diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-08-28 17:22:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-08-28 17:22:39 -0700 |
| commit | e5b7ca09e9aa4d483ab84c5f2ba88f0cc7c66540 (patch) | |
| tree | 02ed6d69a7b8b1a6cea74963d6046c91f7fb9e6c /arch/s390 | |
| parent | 97efd28334e271a7e1112ac4dca24d3feea8404b (diff) | |
| parent | dedf98dd1cfb61cfc74be9248b90a49b42c6dead (diff) | |
Merge tag 's390-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Heiko Carstens:
- Add vfio-ap support to pass-through crypto devices to secure
execution guests
- Add API ordinal 6 support to zcrypt_ep11misc device drive, which is
required to handle key generate and key derive (e.g. secure key to
protected key) correctly
- Add missing secure/has_secure sysfs files for the case where it is
not possible to figure where a system has been booted from. Existing
user space relies on that these files are always present
- Fix DCSS block device driver list corruption, caused by incorrect
error handling
- Convert virt_to_pfn() and pfn_to_virt() from defines to static inline
functions to enforce type checking
- Cleanups, improvements, and minor fixes to the kernel mapping setup
- Fix various virtual vs physical address confusions
- Move pfault code to separate file, since it has nothing to do with
regular fault handling
- Move s390 documentation to Documentation/arch/ like it has been done
for other architectures already
- Add HAVE_FUNCTION_GRAPH_RETVAL support
- Factor out the s390_hypfs filesystem and add a new config option for
it. The filesystem is deprecated and as soon as all users are gone it
can be removed some time in the not so near future
- Remove support for old CEX2 and CEX3 crypto cards from zcrypt device
driver
- Add support for user-defined certificates: receive user-defined
certificates with a diagnose call and provide them via 'cert_store'
keyring to user space
- Couple of other small fixes and improvements all over the place
* tag 's390-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (66 commits)
s390/pci: use builtin_misc_device macro to simplify the code
s390/vfio-ap: make sure nib is shared
KVM: s390: export kvm_s390_pv*_is_protected functions
s390/uv: export uv_pin_shared for direct usage
s390/vfio-ap: check for TAPQ response codes 0x35 and 0x36
s390/vfio-ap: handle queue state change in progress on reset
s390/vfio-ap: use work struct to verify queue reset
s390/vfio-ap: store entire AP queue status word with the queue object
s390/vfio-ap: remove upper limit on wait for queue reset to complete
s390/vfio-ap: allow deconfigured queue to be passed through to a guest
s390/vfio-ap: wait for response code 05 to clear on queue reset
s390/vfio-ap: clean up irq resources if possible
s390/vfio-ap: no need to check the 'E' and 'I' bits in APQSW after TAPQ
s390/ipl: refactor deprecated strncpy
s390/ipl: fix virtual vs physical address confusion
s390/zcrypt_ep11misc: support API ordinal 6 with empty pin-blob
s390/paes: fix PKEY_TYPE_EP11_AES handling for secure keyblobs
s390/pkey: fix PKEY_TYPE_EP11_AES handling for sysfs attributes
s390/pkey: fix PKEY_TYPE_EP11_AES handling in PKEY_VERIFYKEY2 IOCTL
s390/pkey: fix PKEY_TYPE_EP11_AES handling in PKEY_KBLOB2PROTK[23]
...
Diffstat (limited to 'arch/s390')
58 files changed, 2024 insertions, 981 deletions
diff --git a/arch/s390/Kbuild b/arch/s390/Kbuild index 76e362277179..8e4d74f51115 100644 --- a/arch/s390/Kbuild +++ b/arch/s390/Kbuild @@ -3,7 +3,7 @@ obj-y += kernel/ obj-y += mm/ obj-$(CONFIG_KVM) += kvm/ obj-y += crypto/ -obj-$(CONFIG_S390_HYPFS_FS) += hypfs/ +obj-$(CONFIG_S390_HYPFS) += hypfs/ obj-$(CONFIG_APPLDATA_BASE) += appldata/ obj-y += net/ obj-$(CONFIG_PCI) += pci/ diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 5b39918b7042..18bf754e1fad 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -174,6 +174,7 @@ config S390 select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_ARG_ACCESS_API select HAVE_FUNCTION_ERROR_INJECTION + select HAVE_FUNCTION_GRAPH_RETVAL select HAVE_FUNCTION_GRAPH_TRACER select HAVE_FUNCTION_TRACER select HAVE_GCC_PLUGINS @@ -512,6 +513,17 @@ config KEXEC_SIG verification for the corresponding kernel image type being loaded in order for this to work. +config CERT_STORE + bool "Get user certificates via DIAG320" + depends on KEYS + select CRYPTO_LIB_SHA256 + help + Enable this option if you want to access user-provided secure boot + certificates via DIAG 0x320. + + These certificates will be made available via the keyring named + 'cert_store'. + config KERNEL_NOBP def_bool n prompt "Enable modified branch prediction for the kernel by default" @@ -743,9 +755,9 @@ config CRASH_DUMP Crash dump kernels are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec. - Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this. + Refer to <file:Documentation/arch/s390/zfcpdump.rst> for more details on this. This option also enables s390 zfcpdump. - See also <file:Documentation/s390/zfcpdump.rst> + See also <file:Documentation/arch/s390/zfcpdump.rst> endmenu @@ -867,13 +879,24 @@ config APPLDATA_NET_SUM This can also be compiled as a module, which will be called appldata_net_sum.o. -config S390_HYPFS_FS +config S390_HYPFS def_bool y + prompt "s390 hypervisor information" + help + This provides several binary files at (debugfs)/s390_hypfs/ to + provide accounting information in an s390 hypervisor environment. + +config S390_HYPFS_FS + def_bool n prompt "s390 hypervisor file system support" select SYS_HYPERVISOR + depends on S390_HYPFS help This is a virtual file system intended to provide accounting - information in an s390 hypervisor environment. + information in an s390 hypervisor environment. This file system + is deprecated and should not be used. + + Say N if you are unsure. source "arch/s390/kvm/Kconfig" diff --git a/arch/s390/Makefile b/arch/s390/Makefile index 5ed242897b0d..a53a36ee0731 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -119,7 +119,6 @@ export KBUILD_CFLAGS_DECOMPRESSOR OBJCOPYFLAGS := -O binary libs-y += arch/s390/lib/ -drivers-y += drivers/s390/ boot := arch/s390/boot syscalls := arch/s390/kernel/syscalls diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c index 64bd7ac3e35d..b9681cb22753 100644 --- a/arch/s390/boot/startup.c +++ b/arch/s390/boot/startup.c @@ -27,6 +27,7 @@ struct page *__bootdata_preserved(vmemmap); unsigned long __bootdata_preserved(vmemmap_size); unsigned long __bootdata_preserved(MODULES_VADDR); unsigned long __bootdata_preserved(MODULES_END); +unsigned long __bootdata_preserved(max_mappable); unsigned long __bootdata(ident_map_size); u64 __bootdata_preserved(stfle_fac_list[16]); @@ -176,6 +177,7 @@ static unsigned long setup_kernel_memory_layout(void) unsigned long asce_limit; unsigned long rte_size; unsigned long pages; + unsigned long vsize; unsigned long vmax; pages = ident_map_size / PAGE_SIZE; @@ -183,19 +185,19 @@ static unsigned long setup_kernel_memory_layout(void) vmemmap_size = SECTION_ALIGN_UP(pages) * sizeof(struct page); /* choose kernel address space layout: 4 or 3 levels. */ - vmemmap_start = round_up(ident_map_size, _REGION3_SIZE); - if (IS_ENABLED(CONFIG_KASAN) || - vmalloc_size > _REGION2_SIZE || - vmemmap_start + vmemmap_size + vmalloc_size + MODULES_LEN > - _REGION2_SIZE) { + vsize = round_up(ident_map_size, _REGION3_SIZE) + vmemmap_size + + MODULES_LEN + MEMCPY_REAL_SIZE + ABS_LOWCORE_MAP_SIZE; + vsize = size_add(vsize, vmalloc_size); + if (IS_ENABLED(CONFIG_KASAN) || (vsize > _REGION2_SIZE)) { asce_limit = _REGION1_SIZE; rte_size = _REGION2_SIZE; } else { asce_limit = _REGION2_SIZE; rte_size = _REGION3_SIZE; } + /* - * forcing modules and vmalloc area under the ultravisor + * Forcing modules and vmalloc area under the ultravisor * secure storage limit, so that any vmalloc allocation * we do could be used to back secure guest storage. */ @@ -204,7 +206,7 @@ static unsigned long setup_kernel_memory_layout(void) /* force vmalloc and modules below kasan shadow */ vmax = min(vmax, KASAN_SHADOW_START); #endif - __memcpy_real_area = round_down(vmax - PAGE_SIZE, PAGE_SIZE); + __memcpy_real_area = round_down(vmax - MEMCPY_REAL_SIZE, PAGE_SIZE); __abs_lowcore = round_down(__memcpy_real_area - ABS_LOWCORE_MAP_SIZE, sizeof(struct lowcore)); MODULES_END = round_down(__abs_lowcore, _SEGMENT_SIZE); @@ -220,8 +222,9 @@ static unsigned long setup_kernel_memory_layout(void) pages = SECTION_ALIGN_UP(pages); /* keep vmemmap_start aligned to a top level region table entry */ vmemmap_start = round_down(VMALLOC_START - pages * sizeof(struct page), rte_size); - /* vmemmap_start is the future VMEM_MAX_PHYS, make sure it is within MAX_PHYSMEM */ vmemmap_start = min(vmemmap_start, 1UL << MAX_PHYSMEM_BITS); + /* maximum mappable address as seen by arch_get_mappable_range() */ + max_mappable = vmemmap_start; /* make sure identity map doesn't overlay with vmemmap */ ident_map_size = min(ident_map_size, vmemmap_start); vmemmap_size = SECTION_ALIGN_UP(ident_map_size / PAGE_SIZE) * sizeof(struct page); @@ -286,8 +289,9 @@ void startup_kernel(void) setup_lpp(); safe_addr = mem_safe_offset(); + /* - * reserve decompressor memory together with decompression heap, buffer and + * Reserve decompressor memory together with decompression heap, buffer and * memory which might be occupied by uncompressed kernel at default 1Mb * position (if KASLR is off or failed). */ diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig index 3a6a9a88bd38..af2fbe48e16c 100644 --- a/arch/s390/configs/debug_defconfig +++ b/arch/s390/configs/debug_defconfig @@ -835,6 +835,7 @@ CONFIG_RCU_CPU_STALL_TIMEOUT=300 # CONFIG_RCU_TRACE is not set CONFIG_LATENCYTOP=y CONFIG_BOOTTIME_TRACING=y +CONFIG_FUNCTION_GRAPH_RETVAL=y CONFIG_FPROBE=y CONFIG_FUNCTION_PROFILER=y CONFIG_STACK_TRACER=y diff --git a/arch/s390/configs/defconfig b/arch/s390/configs/defconfig index b13a5a0d99d2..3f263b767a4c 100644 --- a/arch/s390/configs/defconfig +++ b/arch/s390/configs/defconfig @@ -787,6 +787,7 @@ CONFIG_RCU_REF_SCALE_TEST=m CONFIG_RCU_CPU_STALL_TIMEOUT=60 CONFIG_LATENCYTOP=y CONFIG_BOOTTIME_TRACING=y +CONFIG_FUNCTION_GRAPH_RETVAL=y CONFIG_FPROBE=y CONFIG_FUNCTION_PROFILER=y CONFIG_STACK_TRACER=y diff --git a/arch/s390/crypto/paes_s390.c b/arch/s390/crypto/paes_s390.c index 38349150c96e..8b541e44151d 100644 --- a/arch/s390/crypto/paes_s390.c +++ b/arch/s390/crypto/paes_s390.c @@ -35,7 +35,7 @@ * and padding is also possible, the limits need to be generous. */ #define PAES_MIN_KEYSIZE 16 -#define PAES_MAX_KEYSIZE 320 +#define PAES_MAX_KEYSIZE MAXEP11AESKEYBLOBSIZE static u8 *ctrblk; static DEFINE_MUTEX(ctrblk_lock); diff --git a/arch/s390/hypfs/Makefile b/arch/s390/hypfs/Makefile index 06f601509ce9..c34854d298f8 100644 --- a/arch/s390/hypfs/Makefile +++ b/arch/s390/hypfs/Makefile @@ -3,7 +3,12 @@ # Makefile for the linux hypfs filesystem routines. # -obj-$(CONFIG_S390_HYPFS_FS) += s390_hypfs.o +obj-$(CONFIG_S390_HYPFS) += hypfs_dbfs.o +obj-$(CONFIG_S390_HYPFS) += hypfs_diag.o +obj-$(CONFIG_S390_HYPFS) += hypfs_diag0c.o +obj-$(CONFIG_S390_HYPFS) += hypfs_sprp.o +obj-$(CONFIG_S390_HYPFS) += hypfs_vm.o -s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o hypfs_dbfs.o hypfs_sprp.o -s390_hypfs-objs += hypfs_diag0c.o +obj-$(CONFIG_S390_HYPFS_FS) += hypfs_diag_fs.o +obj-$(CONFIG_S390_HYPFS_FS) += hypfs_vm_fs.o +obj-$(CONFIG_S390_HYPFS_FS) += inode.o diff --git a/arch/s390/hypfs/hypfs.h b/arch/s390/hypfs/hypfs.h index 05f3f9aee5fc..65f4036fd541 100644 --- a/arch/s390/hypfs/hypfs.h +++ b/arch/s390/hypfs/hypfs.h @@ -46,6 +46,15 @@ void hypfs_diag0c_exit(void); void hypfs_sprp_init(void); void hypfs_sprp_exit(void); +int __hypfs_fs_init(void); + +static inline int hypfs_fs_init(void) +{ + if (IS_ENABLED(CONFIG_S390_HYPFS_FS)) + return __hypfs_fs_init(); + return 0; +} + /* debugfs interface */ struct hypfs_dbfs_file; @@ -69,7 +78,6 @@ struct hypfs_dbfs_file { struct dentry *dentry; }; -extern void hypfs_dbfs_init(void); extern void hypfs_dbfs_exit(void); extern void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df); extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df); diff --git a/arch/s390/hypfs/hypfs_dbfs.c b/arch/s390/hypfs/hypfs_dbfs.c index f4c7dbfaf8ee..4024599eb448 100644 --- a/arch/s390/hypfs/hypfs_dbfs.c +++ b/arch/s390/hypfs/hypfs_dbfs.c @@ -90,12 +90,33 @@ void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df) debugfs_remove(df->dentry); } -void hypfs_dbfs_init(void) +static int __init hypfs_dbfs_init(void) { - dbfs_dir = debugfs_create_dir("s390_hypfs", NULL); -} + int rc = -ENODATA; -void hypfs_dbfs_exit(void) -{ + dbfs_dir = debugfs_create_dir("s390_hypfs", NULL); + if (hypfs_diag_init()) + goto fail_dbfs_exit; + if (hypfs_vm_init()) + goto fail_hypfs_diag_exit; + hypfs_sprp_init(); + if (hypfs_diag0c_init()) + goto fail_hypfs_sprp_exit; + rc = hypfs_fs_init(); + if (rc) + goto fail_hypfs_diag0c_exit; + return 0; + +fail_hypfs_diag0c_exit: + hypfs_diag0c_exit(); +fail_hypfs_sprp_exit: + hypfs_sprp_exit(); + hypfs_vm_exit(); +fail_hypfs_diag_exit: + hypfs_diag_exit(); + pr_err("Initialization of hypfs failed with rc=%i\n", rc); +fail_dbfs_exit: debugfs_remove(dbfs_dir); + return rc; } +device_initcall(hypfs_dbfs_init) diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c index c3be533c4cd3..279b7bba4d43 100644 --- a/arch/s390/hypfs/hypfs_diag.c +++ b/arch/s390/hypfs/hypfs_diag.c @@ -18,188 +18,27 @@ #include <linux/mm.h> #include <asm/diag.h> #include <asm/ebcdic.h> +#include "hypfs_diag.h" #include "hypfs.h" -#define TMP_SIZE 64 /* size of temporary buffers */ - #define DBFS_D204_HDR_VERSION 0 -static char *diag224_cpu_names; /* diag 224 name table */ static enum diag204_sc diag204_store_sc; /* used subcode for store */ static enum diag204_format diag204_info_type; /* used diag 204 data format */ static void *diag204_buf; /* 4K aligned buffer for diag204 data */ -static void *diag204_buf_vmalloc; /* vmalloc pointer for diag204 data */ static int diag204_buf_pages; /* number of pages for diag204 data */ static struct dentry *dbfs_d204_file; -/* - * DIAG 204 member access functions. - * - * Since we have two different diag 204 data formats for old and new s390 - * machines, we do not access the structs directly, but use getter functions for - * each struct member instead. This should make the code more readable. - */ - -/* Time information block */ - -static inline int info_blk_hdr__size(enum diag204_format type) -{ - if (type == DIAG204_INFO_SIMPLE) - return sizeof(struct diag204_info_blk_hdr); - else /* DIAG204_INFO_EXT */ - return sizeof(struct diag204_x_info_blk_hdr); -} - -static inline __u8 info_blk_hdr__npar(enum diag204_format type, void *hdr) -{ - if (type == DIAG204_INFO_SIMPLE) - return ((struct diag204_info_blk_hdr *)hdr)->npar; - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_info_blk_hdr *)hdr)->npar; -} - -static inline __u8 info_blk_hdr__flags(enum diag204_format type, void *hdr) -{ - if (type == DIAG204_INFO_SIMPLE) - return ((struct diag204_info_blk_hdr *)hdr)->flags; - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_info_blk_hdr *)hdr)->flags; -} - -/* Partition header */ - -static inline int part_hdr__size(enum diag204_format type) -{ - if (type == DIAG204_INFO_SIMPLE) - return sizeof(struct diag204_part_hdr); - else /* DIAG204_INFO_EXT */ - return sizeof(struct diag204_x_part_hdr); -} - -static inline __u8 part_hdr__rcpus(enum diag204_format type, void *hdr) -{ - if (type == DIAG204_INFO_SIMPLE) - return ((struct diag204_part_hdr *)hdr)->cpus; - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_part_hdr *)hdr)->rcpus; -} - -static inline void part_hdr__part_name(enum diag204_format type, void *hdr, - char *name) -{ - if (type == DIAG204_INFO_SIMPLE) - memcpy(name, ((struct diag204_part_hdr *)hdr)->part_name, - DIAG204_LPAR_NAME_LEN); - else /* DIAG204_INFO_EXT */ - memcpy(name, ((struct diag204_x_part_hdr *)hdr)->part_name, - DIAG204_LPAR_NAME_LEN); - EBCASC(name, DIAG204_LPAR_NAME_LEN); - name[DIAG204_LPAR_NAME_LEN] = 0; - strim(name); -} - -/* CPU info block */ - -static inline int cpu_info__size(enum diag204_format type) -{ - if (type == DIAG204_INFO_SIMPLE) - return sizeof(struct diag204_cpu_info); - else /* DIAG204_INFO_EXT */ - return sizeof(struct diag204_x_cpu_info); -} - -static inline __u8 cpu_info__ctidx(enum diag204_format type, void *hdr) -{ - if (type == DIAG204_INFO_SIMPLE) - return ((struct diag204_cpu_info *)hdr)->ctidx; - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_cpu_info *)hdr)->ctidx; -} - -static inline __u16 cpu_info__cpu_addr(enum diag204_format type, void *hdr) +enum diag204_format diag204_get_info_type(void) { - if (type == DIAG204_INFO_SIMPLE) - return ((struct diag204_cpu_info *)hdr)->cpu_addr; - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_cpu_info *)hdr)->cpu_addr; + return diag204_info_type; } -static inline __u64 cpu_info__acc_time(enum diag204_format type, void *hdr) +static void diag204_set_info_type(enum diag204_format type) { - if (type == DIAG204_INFO_SIMPLE) - return ((struct diag204_cpu_info *)hdr)->acc_time; - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_cpu_info *)hdr)->acc_time; -} - -static inline __u64 cpu_info__lp_time(enum diag204_format type, void *hdr) -{ - if (type == DIAG204_INFO_SIMPLE) - return ((struct diag204_cpu_info *)hdr)->lp_time; - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_cpu_info *)hdr)->lp_time; -} - -static inline __u64 cpu_info__online_time(enum diag204_format type, void *hdr) -{ - if (type == DIAG204_INFO_SIMPLE) - return 0; /* online_time not available in simple info */ - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_cpu_info *)hdr)->online_time; -} - -/* Physical header */ - -static inline int phys_hdr__size(enum diag204_format type) -{ - if (type == DIAG204_INFO_SIMPLE) - return sizeof(struct diag204_phys_hdr); - else /* DIAG204_INFO_EXT */ - return sizeof(struct diag204_x_phys_hdr); -} - -static inline __u8 phys_hdr__cpus(enum diag204_format type, void *hdr) -{ - if (type == DIAG204_INFO_SIMPLE) - return ((struct diag204_phys_hdr *)hdr)->cpus; - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_phys_hdr *)hdr)->cpus; -} - -/* Physical CPU info block */ - -static inline int phys_cpu__size(enum diag204_format type) -{ - if (type == DIAG204_INFO_SIMPLE) - return sizeof(struct diag204_phys_cpu); - else /* DIAG204_INFO_EXT */ - return sizeof(struct diag204_x_phys_cpu); -} - -static inline __u16 phys_cpu__cpu_addr(enum diag204_format type, void *hdr) -{ - if (type == DIAG204_INFO_SIMPLE) - return ((struct diag204_phys_cpu *)hdr)->cpu_addr; - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_phys_cpu *)hdr)->cpu_addr; -} - -static inline __u64 phys_cpu__mgm_time(enum diag204_format type, void *hdr) -{ - if (type == DIAG204_INFO_SIMPLE) - return ((struct diag204_phys_cpu *)hdr)->mgm_time; - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_phys_cpu *)hdr)->mgm_time; -} - -static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr) -{ - if (type == DIAG204_INFO_SIMPLE) - return ((struct diag204_phys_cpu *)hdr)->ctidx; - else /* DIAG204_INFO_EXT */ - return ((struct diag204_x_phys_cpu *)hdr)->ctidx; + diag204_info_type = type; } /* Diagnose 204 functions */ @@ -212,43 +51,11 @@ static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr) static void diag204_free_buffer(void) { - if (!diag204_buf) - return; - if (diag204_buf_vmalloc) { - vfree(diag204_buf_vmalloc); - diag204_buf_vmalloc = NULL; - } else { - free_pages((unsigned long) diag204_buf, 0); - } + vfree(diag204_buf); diag204_buf = NULL; } -static void *page_align_ptr(void *ptr) -{ - return (void *) PAGE_ALIGN((unsigned long) ptr); -} - -static void *diag204_alloc_vbuf(int pages) -{ - /* The buffer has to be page aligned! */ - diag204_buf_vmalloc = vmalloc(array_size(PAGE_SIZE, (pages + 1))); - if (!diag204_buf_vmalloc) - return ERR_PTR(-ENOMEM); - diag204_buf = page_align_ptr(diag204_buf_vmalloc); - diag204_buf_pages = pages; - return diag204_buf; -} - -static void *diag204_alloc_rbuf(void) -{ - diag204_buf = (void*)__get_free_pages(GFP_KERNEL,0); - if (!diag204_buf) - return ERR_PTR(-ENOMEM); - diag204_buf_pages = 1; - return diag204_buf; -} - -static void *diag204_get_buffer(enum diag204_format fmt, int *pages) +void *diag204_get_buffer(enum diag204_format fmt, int *pages) { if (diag204_buf) { *pages = diag204_buf_pages; @@ -256,15 +63,19 @@ static void *diag204_get_buffer(enum diag204_format fmt, int *pages) } if (fmt == DIAG204_INFO_SIMPLE) { *pages = 1; - return diag204_alloc_rbuf(); } else {/* DIAG204_INFO_EXT */ *pages = diag204((unsigned long)DIAG204_SUBC_RSI | (unsigned long)DIAG204_INFO_EXT, 0, NULL); if (*pages <= 0) - return ERR_PTR(-ENOSYS); - else - return diag204_alloc_vbuf(*pages); + return ERR_PTR(-EOPNOTSUPP); } + diag204_buf = __vmalloc_node(array_size(*pages, PAGE_SIZE), + PAGE_SIZE, GFP_KERNEL, NUMA_NO_NODE, + __builtin_return_address(0)); + if (!diag204_buf) + return ERR_PTR(-ENOMEM); + diag204_buf_pages = *pages; + return diag204_buf; } /* @@ -291,13 +102,13 @@ static int diag204_probe(void) if (diag204((unsigned long)DIAG204_SUBC_STIB7 | (unsigned long)DIAG204_INFO_EXT, pages, buf) >= 0) { diag204_store_sc = DIAG204_SUBC_STIB7; - diag204_info_type = DIAG204_INFO_EXT; + diag204_set_info_type(DIAG204_INFO_EXT); goto out; } if (diag204((unsigned long)DIAG204_SUBC_STIB6 | (unsigned long)DIAG204_INFO_EXT, pages, buf) >= 0) { diag204_store_sc = DIAG204_SUBC_STIB6; - diag204_info_type = DIAG204_INFO_EXT; + diag204_set_info_type(DIAG204_INFO_EXT); goto out; } diag204_free_buffer(); @@ -313,10 +124,10 @@ static int diag204_probe(void) if (diag204((unsigned long)DIAG204_SUBC_STIB4 | (unsigned long)DIAG204_INFO_SIMPLE, pages, buf) >= 0) { diag204_store_sc = DIAG204_SUBC_STIB4; - diag204_info_type = DIAG204_INFO_SIMPLE; + diag204_set_info_type(DIAG204_INFO_SIMPLE); goto out; } else { - rc = -ENOSYS; + rc = -EOPNOTSUPP; goto fail_store; } out: @@ -327,58 +138,13 @@ fail_alloc: return rc; } -static int diag204_do_store(void *buf, int pages) +int diag204_store(void *buf, int pages) { int rc; - rc = diag204((unsigned long) diag204_store_sc | - (unsigned long) diag204_info_type, pages, buf); - return rc < 0 ? -ENOSYS : 0; -} - -static void *diag204_store(void) -{ - void *buf; - int pages, rc; - - buf = diag204_get_buffer(diag204_info_type, &pages); - if (IS_ERR(buf)) - goto out; - rc = diag204_do_store(buf, pages); - if (rc) - return ERR_PTR(rc); -out: - return buf; -} - -/* Diagnose 224 functions */ - -static int diag224_get_name_table(void) -{ - /* memory must be below 2GB */ - diag224_cpu_names = (char *) __get_free_page(GFP_KERNEL | GFP_DMA); - if (!diag224_cpu_names) - return -ENOMEM; - if (diag224(diag224_cpu_names)) { - free_page((unsigned long) diag224_cpu_names); - return -EOPNOTSUPP; - } - EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16); - return 0; -} - -static void diag224_delete_name_table(void) -{ - free_page((unsigned long) diag224_cpu_names); -} - -static int diag224_idx2name(int index, char *name) -{ - memcpy(name, diag224_cpu_names + ((index + 1) * DIAG204_CPU_NAME_LEN), - DIAG204_CPU_NAME_LEN); - name[DIAG204_CPU_NAME_LEN] = 0; - strim(name); - return 0; + rc = diag204((unsigned long)diag204_store_sc | + (unsigned long)diag204_get_info_type(), pages, buf); + return rc < 0 ? -EOPNOTSUPP : 0; } struct dbfs_d204_hdr { @@ -403,8 +169,8 @@ static int dbfs_d204_create(void **data, void **data_free_ptr, size_t *size) base = vzalloc(buf_size); if (!base) return -ENOMEM; - d204 = page_align_ptr(base + sizeof(d204->hdr)) - sizeof(d204->hdr); - rc = diag204_do_store(d204->buf, diag204_buf_pages); + d204 = PTR_ALIGN(base + sizeof(d204->hdr), PAGE_SIZE) - sizeof(d204->hdr); + rc = diag204_store(d204->buf, diag204_buf_pages); if (rc) { vfree(base); return rc; @@ -433,176 +199,21 @@ __init int hypfs_diag_init(void) return -ENODATA; } - if (diag204_info_type == DIAG204_INFO_EXT) + if (diag204_get_info_type() == DIAG204_INFO_EXT) hypfs_dbfs_create_file(&dbfs_file_d204); - if (MACHINE_IS_LPAR) { - rc = diag224_get_name_table(); - if (rc) { - pr_err("The hardware system does not provide all " - "functions required by hypfs\n"); - debugfs_remove(dbfs_d204_file); - return rc; - } + rc = hypfs_diag_fs_init(); + if (rc) { + pr_err("The hardware system does not provide all functions required by hypfs\n"); + debugfs_remove(dbfs_d204_file); } - return 0; + return rc; } void hypfs_diag_exit(void) { debugfs_remove(dbfs_d204_file); - diag224_delete_name_table(); + hypfs_diag_fs_exit(); diag204_free_buffer(); hypfs_dbfs_remove_file(&dbfs_file_d204); } - -/* - * Functions to create the directory structure - * ******************************************* - */ - -static int hypfs_create_cpu_files(struct dentry *cpus_dir, void *cpu_info) -{ - struct dentry *cpu_dir; - char buffer[TMP_SIZE]; - void *rc; - - snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_info_type, - cpu_info)); - cpu_dir = hypfs_mkdir(cpus_dir, buffer); - rc = hypfs_create_u64(cpu_dir, "mgmtime", - cpu_info__acc_time(diag204_info_type, cpu_info) - - cpu_info__lp_time(diag204_info_type, cpu_info)); - if (IS_ERR(rc)) - return PTR_ERR(rc); - rc = hypfs_create_u64(cpu_dir, "cputime", - cpu_info__lp_time(diag204_info_type, cpu_info)); - if (IS_ERR(rc)) - return PTR_ERR(rc); - if (diag204_info_type == DIAG204_INFO_EXT) { - rc = hypfs_create_u64(cpu_dir, "onlinetime", - cpu_info__online_time(diag204_info_type, - cpu_info)); - if (IS_ERR(rc)) - return PTR_ERR(rc); - } - diag224_idx2name(cpu_info__ctidx(diag204_info_type, cpu_info), buffer); - rc = hypfs_create_str(cpu_dir, "type", buffer); - return PTR_ERR_OR_ZERO(rc); -} - -static void *hypfs_create_lpar_files(struct dentry *systems_dir, void *part_hdr) -{ - struct dentry *cpus_dir; - struct dentry *lpar_dir; - char lpar_name[DIAG204_LPAR_NAME_LEN + 1]; - void *cpu_info; - int i; - - part_hdr__part_name(diag204_info_type, part_hdr, lpar_name); - lpar_name[DIAG204_LPAR_NAME_LEN] = 0; - lpar_dir = hypfs_mkdir(systems_dir, lpar_name); - if (IS_ERR(lpar_dir)) - return lpar_dir; - cpus_dir = hypfs_mkdir(lpar_dir, "cpus"); - if (IS_ERR(cpus_dir)) - return cpus_dir; - cpu_info = part_hdr + part_hdr__size(diag204_info_type); - for (i = 0; i < part_hdr__rcpus(diag204_info_type, part_hdr); i++) { - int rc; - rc = hypfs_create_cpu_files(cpus_dir, cpu_info); - if (rc) - return ERR_PTR(rc); - cpu_info += cpu_info__size(diag204_info_type); - } - return cpu_info; -} - -static int hypfs_create_phys_cpu_files(struct dentry *cpus_dir, void *cpu_info) -{ - struct dentry *cpu_dir; - char buffer[TMP_SIZE]; - void *rc; - - snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_info_type, - cpu_info)); - cpu_dir = hypfs_mkdir(cpus_dir, buffer); - if (IS_ERR(cpu_dir)) - return PTR_ERR(cpu_dir); - rc = hypfs_create_u64(cpu_dir, "mgmtime", - phys_cpu__mgm_time(diag204_info_type, cpu_info)); - if (IS_ERR(rc)) - return PTR_ERR(rc); - diag224_idx2name(phys_cpu__ctidx(diag204_info_type, cpu_info), buffer); - rc = hypfs_create_str(cpu_dir, "type", buffer); - return PTR_ERR_OR_ZERO(rc); -} - -static void *hypfs_create_phys_files(struct dentry *parent_dir, void *phys_hdr) -{ - int i; - void *cpu_info; - struct dentry *cpus_dir; - - cpus_dir = hypfs_mkdir(parent_dir, "cpus"); - if (IS_ERR(cpus_dir)) - return cpus_dir; - cpu_info = phys_hdr + phys_hdr__size(diag204_info_type); - for (i = 0; i < phys_hdr__cpus(diag204_info_type, phys_hdr); i++) { - int rc; - rc = hypfs_create_phys_cpu_files(cpus_dir, cpu_info); - if (rc) - return ERR_PTR(rc); - cpu_info += phys_cpu__size(diag204_info_type); - } - return cpu_info; -} - -int hypfs_diag_create_files(struct dentry *root) -{ - struct dentry *systems_dir, *hyp_dir; - void *time_hdr, *part_hdr; - int i, rc; - void *buffer, *ptr; - - buffer = diag204_store(); - if (IS_ERR(buffer)) - return PTR_ERR(buffer); - - systems_dir = hypfs_mkdir(root, "systems"); - if (IS_ERR(systems_dir)) { - rc = PTR_ERR(systems_dir); - goto err_out; - } - time_hdr = (struct x_info_blk_hdr *)buffer; - part_hdr = time_hdr + info_blk_hdr__size(diag204_info_type); - for (i = 0; i < info_blk_hdr__npar(diag204_info_type, time_hdr); i++) { - part_hdr = hypfs_create_lpar_files(systems_dir, part_hdr); - if (IS_ERR(part_hdr)) { - rc = PTR_ERR(part_hdr); - goto err_out; - } - } - if (info_blk_hdr__flags(diag204_info_type, time_hdr) & - DIAG204_LPAR_PHYS_FLG) { - ptr = hypfs_create_phys_files(root, part_hdr); - if (IS_ERR(ptr)) { - rc = PTR_ERR(ptr); - goto err_out; - } - } - hyp_dir = hypfs_mkdir(root, "hyp"); - if (IS_ERR(hyp_dir)) { - rc = PTR_ERR(hyp_dir); - goto err_out; - } - ptr = hypfs_create_str(hyp_dir, "type", "LPAR Hypervisor"); - if (IS_ERR(ptr)) { - rc = PTR_ERR(ptr); - goto err_out; - } - rc = 0; - -err_out: - return rc; -} diff --git a/arch/s390/hypfs/hypfs_diag.h b/arch/s390/hypfs/hypfs_diag.h new file mode 100644 index 000000000000..7090eff27fef --- /dev/null +++ b/arch/s390/hypfs/hypfs_diag.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Hypervisor filesystem for Linux on s390. Diag 204 and 224 + * implementation. + * + * Copyright IBM Corp. 2006, 2008 + * Author(s): Michael Holzheu <holzheu@de.ibm.com> + */ + +#ifndef _S390_HYPFS_DIAG_H_ +#define _S390_HYPFS_DIAG_H_ + +#include <asm/diag.h> + +enum diag204_format diag204_get_info_type(void); +void *diag204_get_buffer(enum diag204_format fmt, int *pages); +int diag204_store(void *buf, int pages); + +int __hypfs_diag_fs_init(void); +void __hypfs_diag_fs_exit(void); + +static inline int hypfs_diag_fs_init(void) +{ + if (IS_ENABLED(CONFIG_S390_HYPFS_FS)) + return __hypfs_diag_fs_init(); + return 0; +} + +static inline void hypfs_diag_fs_exit(void) +{ + if (IS_ENABLED(CONFIG_S390_HYPFS_FS)) + __hypfs_diag_fs_exit(); +} + +#endif /* _S390_HYPFS_DIAG_H_ */ diff --git a/arch/s390/hypfs/hypfs_diag_fs.c b/arch/s390/hypfs/hypfs_diag_fs.c new file mode 100644 index 000000000000..00a6d370a280 --- /dev/null +++ b/arch/s390/hypfs/hypfs_diag_fs.c @@ -0,0 +1,393 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Hypervisor filesystem for Linux on s390. Diag 204 and 224 + * implementation. + * + * Copyright IBM Corp. 2006, 2008 + * Author(s): Michael Holzheu <holzheu@de.ibm.com> + */ + +#define KMSG_COMPONENT "hypfs" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/vmalloc.h> +#include <linux/mm.h> +#include <asm/diag.h> +#include <asm/ebcdic.h> +#include "hypfs_diag.h" +#include "hypfs.h" + +#define TMP_SIZE 64 /* size of temporary buffers */ + +static char *diag224_cpu_names; /* diag 224 name table */ +static int diag224_idx2name(int index, char *name); + +/* + * DIAG 204 member access functions. + * + * Since we have two different diag 204 data formats for old and new s390 + * machines, we do not access the structs directly, but use getter functions for + * each struct member instead. This should make the code more readable. + */ + +/* Time information block */ + +static inline int info_blk_hdr__size(enum diag204_format type) +{ + if (type == DIAG204_INFO_SIMPLE) + return sizeof(struct diag204_info_blk_hdr); + else /* DIAG204_INFO_EXT */ + return sizeof(struct diag204_x_info_blk_hdr); +} + +static inline __u8 info_blk_hdr__npar(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return ((struct diag204_info_blk_hdr *)hdr)->npar; + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_info_blk_hdr *)hdr)->npar; +} + +static inline __u8 info_blk_hdr__flags(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return ((struct diag204_info_blk_hdr *)hdr)->flags; + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_info_blk_hdr *)hdr)->flags; +} + +/* Partition header */ + +static inline int part_hdr__size(enum diag204_format type) +{ + if (type == DIAG204_INFO_SIMPLE) + return sizeof(struct diag204_part_hdr); + else /* DIAG204_INFO_EXT */ + return sizeof(struct diag204_x_part_hdr); +} + +static inline __u8 part_hdr__rcpus(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return ((struct diag204_part_hdr *)hdr)->cpus; + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_part_hdr *)hdr)->rcpus; +} + +static inline void part_hdr__part_name(enum diag204_format type, void *hdr, + char *name) +{ + if (type == DIAG204_INFO_SIMPLE) + memcpy(name, ((struct diag204_part_hdr *)hdr)->part_name, + DIAG204_LPAR_NAME_LEN); + else /* DIAG204_INFO_EXT */ + memcpy(name, ((struct diag204_x_part_hdr *)hdr)->part_name, + DIAG204_LPAR_NAME_LEN); + EBCASC(name, DIAG204_LPAR_NAME_LEN); + name[DIAG204_LPAR_NAME_LEN] = 0; + strim(name); +} + +/* CPU info block */ + +static inline int cpu_info__size(enum diag204_format type) +{ + if (type == DIAG204_INFO_SIMPLE) + return sizeof(struct diag204_cpu_info); + else /* DIAG204_INFO_EXT */ + return sizeof(struct diag204_x_cpu_info); +} + +static inline __u8 cpu_info__ctidx(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return ((struct diag204_cpu_info *)hdr)->ctidx; + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_cpu_info *)hdr)->ctidx; +} + +static inline __u16 cpu_info__cpu_addr(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return ((struct diag204_cpu_info *)hdr)->cpu_addr; + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_cpu_info *)hdr)->cpu_addr; +} + +static inline __u64 cpu_info__acc_time(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return ((struct diag204_cpu_info *)hdr)->acc_time; + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_cpu_info *)hdr)->acc_time; +} + +static inline __u64 cpu_info__lp_time(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return ((struct diag204_cpu_info *)hdr)->lp_time; + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_cpu_info *)hdr)->lp_time; +} + +static inline __u64 cpu_info__online_time(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return 0; /* online_time not available in simple info */ + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_cpu_info *)hdr)->online_time; +} + +/* Physical header */ + +static inline int phys_hdr__size(enum diag204_format type) +{ + if (type == DIAG204_INFO_SIMPLE) + return sizeof(struct diag204_phys_hdr); + else /* DIAG204_INFO_EXT */ + return sizeof(struct diag204_x_phys_hdr); +} + +static inline __u8 phys_hdr__cpus(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return ((struct diag204_phys_hdr *)hdr)->cpus; + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_phys_hdr *)hdr)->cpus; +} + +/* Physical CPU info block */ + +static inline int phys_cpu__size(enum diag204_format type) +{ + if (type == DIAG204_INFO_SIMPLE) + return sizeof(struct diag204_phys_cpu); + else /* DIAG204_INFO_EXT */ + return sizeof(struct diag204_x_phys_cpu); +} + +static inline __u16 phys_cpu__cpu_addr(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return ((struct diag204_phys_cpu *)hdr)->cpu_addr; + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_phys_cpu *)hdr)->cpu_addr; +} + +static inline __u64 phys_cpu__mgm_time(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return ((struct diag204_phys_cpu *)hdr)->mgm_time; + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_phys_cpu *)hdr)->mgm_time; +} + +static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr) +{ + if (type == DIAG204_INFO_SIMPLE) + return ((struct diag204_phys_cpu *)hdr)->ctidx; + else /* DIAG204_INFO_EXT */ + return ((struct diag204_x_phys_cpu *)hdr)->ctidx; +} + +/* + * Functions to create the directory structure + * ******************************************* + */ + +static int hypfs_create_cpu_files(struct dentry *cpus_dir, void *cpu_info) +{ + struct dentry *cpu_dir; + char buffer[TMP_SIZE]; + void *rc; + + snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_get_info_type(), + cpu_info)); + cpu_dir = hypfs_mkdir(cpus_dir, buffer); + rc = hypfs_create_u64(cpu_dir, "mgmtime", + cpu_info__acc_time(diag204_get_info_type(), cpu_info) - + cpu_info__lp_time(diag204_get_info_type(), cpu_info)); + if (IS_ERR(rc)) + return PTR_ERR(rc); + rc = hypfs_create_u64(cpu_dir, "cputime", + cpu_info__lp_time(diag204_get_info_type(), cpu_info)); + if (IS_ERR(rc)) + return PTR_ERR(rc); + if (diag204_get_info_type() == DIAG204_INFO_EXT) { + rc = hypfs_create_u64(cpu_dir, "onlinetime", + cpu_info__online_time(diag204_get_info_type(), + cpu_info)); + if (IS_ERR(rc)) + return PTR_ERR(rc); + } + diag224_idx2name(cpu_info__ctidx(diag204_get_info_type(), cpu_info), buffer); + rc = hypfs_create_str(cpu_dir, "type", buffer); + return PTR_ERR_OR_ZERO(rc); +} + +static void *hypfs_create_lpar_files(struct dentry *systems_dir, void *part_hdr) +{ + struct dentry *cpus_dir; + struct dentry *lpar_dir; + char lpar_name[DIAG204_LPAR_NAME_LEN + 1]; + void *cpu_info; + int i; + + part_hdr__part_name(diag204_get_info_type(), part_hdr, lpar_name); + lpar_name[DIAG204_LPAR_NAME_LEN] = 0; + lpar_dir = hypfs_mkdir(systems_dir, lpar_name); + if (IS_ERR(lpar_dir)) + return lpar_dir; + cpus_dir = hypfs_mkdir(lpar_dir, "cpus"); + if (IS_ERR(cpus_dir)) + return cpus_dir; + cpu_info = part_hdr + part_hdr__size(diag204_get_info_type()); + for (i = 0; i < part_hdr__rcpus(diag204_get_info_type(), part_hdr); i++) { + int rc; + + rc = hypfs_create_cpu_files(cpus_dir, cpu_info); + if (rc) + return ERR_PTR(rc); + cpu_info += cpu_info__size(diag204_get_info_type()); + } + return cpu_info; +} + +static int hypfs_create_phys_cpu_files(struct dentry *cpus_dir, void *cpu_info) +{ + struct dentry *cpu_dir; + char buffer[TMP_SIZE]; + void *rc; + + snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_get_info_type(), + cpu_info)); + cpu_dir = hypfs_mkdir(cpus_dir, buffer); + if (IS_ERR(cpu_dir)) + return PTR_ERR(cpu_dir); + rc = hypfs_create_u64(cpu_dir, "mgmtime", + phys_cpu__mgm_time(diag204_get_info_type(), cpu_info)); + if (IS_ERR(rc)) + return PTR_ERR(rc); + diag224_idx2name(phys_cpu__ctidx(diag204_get_info_type(), cpu_info), buffer); + rc = hypfs_create_str(cpu_dir, "type", buffer); + return PTR_ERR_OR_ZERO(rc); +} + +static void *hypfs_create_phys_files(struct dentry *parent_dir, void *phys_hdr) +{ + int i; + void *cpu_info; + struct dentry *cpus_dir; + + cpus_dir = hypfs_mkdir(parent_dir, "cpus"); + if (IS_ERR(cpus_dir)) + return cpus_dir; + cpu_info = phys_hdr + phys_hdr__size(diag204_get_info_type()); + for (i = 0; i < phys_hdr__cpus(diag204_get_info_type(), phys_hdr); i++) { + int rc; + + rc = hypfs_create_phys_cpu_files(cpus_dir, cpu_info); + if (rc) + return ERR_PTR(rc); + cpu_info += phys_cpu__size(diag204_get_info_type()); + } + return cpu_info; +} + +int hypfs_diag_create_files(struct dentry *root) +{ + struct dentry *systems_dir, *hyp_dir; + void *time_hdr, *part_hdr; + void *buffer, *ptr; + int i, rc, pages; + + buffer = diag204_get_buffer(diag204_get_info_type(), &pages); + if (IS_ERR(buffer)) + return PTR_ERR(buffer); + rc = diag204_store(buffer, pages); + if (rc) + return rc; + + systems_dir = hypfs_mkdir(root, "systems"); + if (IS_ERR(systems_dir)) { + rc = PTR_ERR(systems_dir); + goto err_out; + } + time_hdr = (struct x_info_blk_hdr *)buffer; + part_hdr = time_hdr + info_blk_hdr__size(diag204_get_info_type()); + for (i = 0; i < info_blk_hdr__npar(diag204_get_info_type(), time_hdr); i++) { + part_hdr = hypfs_create_lpar_files(systems_dir, part_hdr); + if (IS_ERR(part_hdr)) { + rc = PTR_ERR(part_hdr); + goto err_out; + } + } + if (info_blk_hdr__flags(diag204_get_info_type(), time_hdr) & + DIAG204_LPAR_PHYS_FLG) { + ptr = hypfs_create_phys_files(root, part_hdr); + if (IS_ERR(ptr)) { + rc = PTR_ERR(ptr); + goto err_out; + } + } + hyp_dir = hypfs_mkdir(root, "hyp"); + if (IS_ERR(hyp_dir)) { + rc = PTR_ERR(hyp_dir); + goto err_out; + } + ptr = hypfs_create_str(hyp_dir, "type", "LPAR Hypervisor"); + if (IS_ERR(ptr)) { + rc = PTR_ERR(ptr); + goto err_out; + } + rc = 0; + +err_out: + return rc; +} + +/* Diagnose 224 functions */ + +static int diag224_idx2name(int index, char *name) +{ + memcpy(name, diag224_cpu_names + ((index + 1) * DIAG204_CPU_NAME_LEN), + DIAG204_CPU_NAME_LEN); + name[DIAG204_CPU_NAME_LEN] = 0; + strim(name); + return 0; +} + +static int diag224_get_name_table(void) +{ + /* memory must be below 2GB */ + diag224_cpu_names = (char *)__get_free_page(GFP_KERNEL | GFP_DMA); + if (!diag224_cpu_names) + return -ENOMEM; + if (diag224(diag224_cpu_names)) { + free_page((unsigned long)diag224_cpu_names); + return -EOPNOTSUPP; + } + EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16); + return 0; +} + +static void diag224_delete_name_table(void) +{ + free_page((unsigned long)diag224_cpu_names); +} + +int __init __hypfs_diag_fs_init(void) +{ + if (MACHINE_IS_LPAR) + return diag224_get_name_table(); + return 0; +} + +void __hypfs_diag_fs_exit(void) +{ + diag224_delete_name_table(); +} diff --git a/arch/s390/hypfs/hypfs_vm.c b/arch/s390/hypfs/hypfs_vm.c index a3d881ca0a98..3db40ad853e0 100644 --- a/arch/s390/hypfs/hypfs_vm.c +++ b/arch/s390/hypfs/hypfs_vm.c @@ -14,47 +14,15 @@ #include <asm/diag.h> #include <asm/ebcdic.h> #include <asm/timex.h> +#include "hypfs_vm.h" #include "hypfs.h" -#define NAME_LEN 8 #define DBFS_D2FC_HDR_VERSION 0 static char local_guest[] = " "; static char all_guests[] = "* "; static char *all_groups = all_guests; -static char *guest_query; - -struct diag2fc_data { - __u32 version; - __u32 flags; - __u64 used_cpu; - __u64 el_time; - __u64 mem_min_kb; - __u64 mem_max_kb; - __u64 mem_share_kb; - __u64 mem_used_kb; - __u32 pcpus; - __u32 lcpus; - __u32 vcpus; - __u32 ocpus; - __u32 cpu_max; - __u32 cpu_shares; - __u32 cpu_use_samp; - __u32 cpu_delay_samp; - __u32 page_wait_samp; - __u32 idle_samp; - __u32 other_samp; - __u32 total_samp; - char guest_name[NAME_LEN]; -}; - -struct diag2fc_parm_list { - char userid[NAME_LEN]; - char aci_grp[NAME_LEN]; - __u64 addr; - __u32 size; - __u32 fmt; -}; +char *diag2fc_guest_query; static int diag2fc(int size, char* query, void *addr) { @@ -62,10 +30,10 @@ static int diag2fc(int size, char* query, void *addr) unsigned long rc; struct diag2fc_parm_list parm_list; - memcpy(parm_list.userid, query, NAME_LEN); - ASCEBC(parm_list.userid, NAME_LEN); - memcpy(parm_list.aci_grp, all_groups, NAME_LEN); - ASCEBC(parm_list.aci_grp, NAME_LEN); + memcpy(parm_list.userid, query, DIAG2FC_NAME_LEN); + ASCEBC(parm_list.userid, DIAG2FC_NAME_LEN); + memcpy(parm_list.aci_grp, all_groups, DIAG2FC_NAME_LEN); + ASCEBC(parm_list.aci_grp, DIAG2FC_NAME_LEN); parm_list.addr = (unsigned long)addr; parm_list.size = size; parm_list.fmt = 0x02; @@ -87,7 +55,7 @@ static int diag2fc(int size, char* query, void *addr) /* * Allocate buffer for "query" and store diag 2fc at "offset" */ -static void *diag2fc_store(char *query, unsigned int *count, int offset) +void *diag2fc_store(char *query, unsigned int *count, int offset) { void *data; int size; @@ -108,132 +76,11 @@ static void *diag2fc_store(char *query, unsigned int *count, int offset) return data; } -static void diag2fc_free(const void *data) +void diag2fc_free(const void *data) { vfree(data); } -#define ATTRIBUTE(dir, name, member) \ -do { \ - void *rc; \ - rc = hypfs_create_u64(dir, name, member); \ - if (IS_ERR(rc)) \ - return PTR_ERR(rc); \ -} while(0) - -static int hypfs_vm_create_guest(struct dentry *systems_dir, - struct diag2fc_data *data) -{ - char guest_name[NAME_LEN + 1] = {}; - struct dentry *guest_dir, *cpus_dir, *samples_dir, *mem_dir; - int dedicated_flag, capped_value; - - capped_value = (data->flags & 0x00000006) >> 1; - dedicated_flag = (data->flags & 0x00000008) >> 3; - - /* guest dir */ - memcpy(guest_name, data->guest_name, NAME_LEN); - EBCASC(guest_name, NAME_LEN); - strim(guest_name); - guest_dir = hypfs_mkdir(systems_dir, guest_name); - if (IS_ERR(guest_dir)) - return PTR_ERR(guest_dir); - ATTRIBUTE(guest_dir, "onlinetime_us", data->el_time); - - /* logical cpu information */ - cpus_dir = hypfs_mkdir(guest_dir, "cpus"); - if (IS_ERR(cpus_dir)) - return PTR_ERR(cpus_dir); - ATTRIBUTE(cpus_dir, "cputime_us", data->used_cpu); - ATTRIBUTE(cpus_dir, "capped", capped_value); - ATTRIBUTE(cpus_dir, "dedicated", dedicated_flag); - ATTRIBUTE(cpus_dir, "count", data->vcpus); - /* - * Note: The "weight_min" attribute got the wrong name. - * The value represents the number of non-stopped (operating) - * CPUS. - */ - ATTRIBUTE(cpus_dir, "weight_min", data->ocpus); - ATTRIBUTE(cpus_dir, "weight_max", data->cpu_max); - ATTRIBUTE(cpus_dir, "weight_cur", data->cpu_shares); - - /* memory information */ - mem_dir = hypfs_mkdir(guest_dir, "mem"); - if (IS_ERR(mem_dir)) - return PTR_ERR(mem_dir); - ATTRIBUTE(mem_dir, "min_KiB", data->mem_min_kb); - ATTRIBUTE(mem_dir, "max_KiB", data->mem_max_kb); - ATTRIBUTE(mem_dir, "used_KiB", data->mem_used_kb); - ATTRIBUTE(mem_dir, "share_KiB", data->mem_share_kb); - - /* samples */ - samples_dir = hypfs_mkdir(guest_dir, "samples"); - if (IS_ERR(samples_dir)) - return PTR_ERR(samples_dir); - ATTRIBUTE(samples_dir, "cpu_using", data->cpu_use_samp); - ATTRIBUTE(samples_dir, "cpu_delay", data->cpu_delay_samp); - ATTRIBUTE(samples_dir, "mem_delay", data->page_wait_samp); - ATTRIBUTE(samples_dir, "idle", data->idle_samp); - ATTRIBUTE(samples_dir, "other", data->other_samp); - ATTRIBUTE(samples_dir, "total", data->total_samp); - return 0; -} - -int hypfs_vm_create_files(struct dentry *root) -{ - struct dentry *dir, *file; - struct diag2fc_data *data; - unsigned int count = 0; - int rc, i; - - data = diag2fc_store(guest_query, &count, 0); - if (IS_ERR(data)) - return PTR_ERR(data); - - /* Hypervisor Info */ - dir = hypfs_mkdir(root, "hyp"); - if (IS_ERR(dir)) { - rc = PTR_ERR(dir); - goto failed; - } - file = hypfs_create_str(dir, "type", "z/VM Hypervisor"); - if (IS_ERR(file)) { - rc = PTR_ERR(file); - goto failed; - } - - /* physical cpus */ - dir = hypfs_mkdir(root, "cpus"); - if (IS_ERR(dir)) { - rc = PTR_ERR(dir); - goto failed; - } - file = hypfs_create_u64(dir, "count", data->lcpus); - if (IS_ERR(file)) { - rc = PTR_ERR(file); - goto failed; - } - - /* guests */ - dir = hypfs_mkdir(root, "systems"); - if (IS_ERR(dir)) { - rc = PTR_ERR(dir); - goto failed; - } - - for (i = 0; i < count; i++) { - rc = hypfs_vm_create_guest(dir, &(data[i])); - if (rc) - goto failed; - } - diag2fc_free(data); - return 0; - -failed: - diag2fc_free(data); - return rc; -} - struct dbfs_d2fc_hdr { u64 len; /* Length of d2fc buffer without header */ u16 version; /* Version of header */ @@ -252,7 +99,7 @@ static int dbfs_diag2fc_create(void **data, void **data_free_ptr, size_t *size) struct dbfs_d2fc *d2fc; unsigned int count; - d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr)); + d2fc = diag2fc_store(diag2fc_guest_query, &count, sizeof(d2fc->hdr)); if (IS_ERR(d2fc)) return PTR_ERR(d2fc); store_tod_clock_ext(&d2fc->hdr.tod_ext); @@ -277,9 +124,9 @@ int hypfs_vm_init(void) if (!MACHINE_IS_VM) return 0; if (diag2fc(0, all_guests, NULL) > 0) - guest_query = all_guests; + diag2fc_guest_query = all_guests; else if (diag2fc(0, local_guest, NULL) > 0) - guest_query = local_guest; + diag2fc_guest_query = local_guest; else return -EACCES; hypfs_dbfs_create_file(&dbfs_file_2fc); diff --git a/arch/s390/hypfs/hypfs_vm.h b/arch/s390/hypfs/hypfs_vm.h new file mode 100644 index 000000000000..fe2e5851addd --- /dev/null +++ b/arch/s390/hypfs/hypfs_vm.h @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Hypervisor filesystem for Linux on s390. z/VM implementation. + * + * Copyright IBM Corp. 2006 + * Author(s): Michael Holzheu <holzheu@de.ibm.com> + */ + +#ifndef _S390_HYPFS_VM_H_ +#define _S390_HYPFS_VM_H_ + +#define DIAG2FC_NAME_LEN 8 + +struct diag2fc_data { + __u32 version; + __u32 flags; + __u64 used_cpu; + __u64 el_time; + __u64 mem_min_kb; + __u64 mem_max_kb; + __u64 mem_share_kb; + __u64 mem_used_kb; + __u32 pcpus; + __u32 lcpus; + __u32 vcpus; + __u32 ocpus; + __u32 cpu_max; + __u32 cpu_shares; + __u32 cpu_use_samp; + __u32 cpu_delay_samp; + __u32 page_wait_samp; + __u32 idle_samp; + __u32 other_samp; + __u32 total_samp; + char guest_name[DIAG2FC_NAME_LEN]; +}; + +struct diag2fc_parm_list { + char userid[DIAG2FC_NAME_LEN]; + char aci_grp[DIAG2FC_NAME_LEN]; + __u64 addr; + __u32 size; + __u32 fmt; +}; + +void *diag2fc_store(char *query, unsigned int *count, int offset); +void diag2fc_free(const void *data); +extern char *diag2fc_guest_query; + +#endif /* _S390_HYPFS_VM_H_ */ diff --git a/arch/s390/hypfs/hypfs_vm_fs.c b/arch/s390/hypfs/hypfs_vm_fs.c new file mode 100644 index 000000000000..6011289afa8c --- /dev/null +++ b/arch/s390/hypfs/hypfs_vm_fs.c @@ -0,0 +1,139 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Hypervisor filesystem for Linux on s390. z/VM implementation. + * + * Copyright IBM Corp. 2006 + * Author(s): Michael Holzheu <holzheu@de.ibm.com> + */ + +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/vmalloc.h> +#include <asm/extable.h> +#include <asm/diag.h> +#include <asm/ebcdic.h> +#include <asm/timex.h> +#include "hypfs_vm.h" +#include "hypfs.h" + +#define ATTRIBUTE(dir, name, member) \ +do { \ + void *rc; \ + rc = hypfs_create_u64(dir, name, member); \ + if (IS_ERR(rc)) \ + return PTR_ERR(rc); \ +} while (0) + +static int hypfs_vm_create_guest(struct dentry *systems_dir, + struct diag2fc_data *data) +{ + char guest_name[DIAG2FC_NAME_LEN + 1] = {}; + struct dentry *guest_dir, *cpus_dir, *samples_dir, *mem_dir; + int dedicated_flag, capped_value; + + capped_value = (data->flags & 0x00000006) >> 1; + dedicated_flag = (data->flags & 0x00000008) >> 3; + + /* guest dir */ + memcpy(guest_name, data->guest_name, DIAG2FC_NAME_LEN); + EBCASC(guest_name, DIAG2FC_NAME_LEN); + strim(guest_name); + guest_dir = hypfs_mkdir(systems_dir, guest_name); + if (IS_ERR(guest_dir)) + return PTR_ERR(guest_dir); + ATTRIBUTE(guest_dir, "onlinetime_us", data->el_time); + + /* logical cpu information */ + cpus_dir = hypfs_mkdir(guest_dir, "cpus"); + if (IS_ERR(cpus_dir)) + return PTR_ERR(cpus_dir); + ATTRIBUTE(cpus_dir, "cputime_us", data->used_cpu); + ATTRIBUTE(cpus_dir, "capped", capped_value); + ATTRIBUTE(cpus_dir, "dedicated", dedicated_flag); + ATTRIBUTE(cpus_dir, "count", data->vcpus); + /* + * Note: The "weight_min" attribute got the wrong name. + * The value represents the number of non-stopped (operating) + * CPUS. + */ + ATTRIBUTE(cpus_dir, "weight_min", data->ocpus); + ATTRIBUTE(cpus_dir, "weight_max", data->cpu_max); + ATTRIBUTE(cpus_dir, "weight_cur", data->cpu_shares); + + /* memory information */ + mem_dir = hypfs_mkdir(guest_dir, "mem"); + if (IS_ERR(mem_dir)) + return PTR_ERR(mem_dir); + ATTRIBUTE(mem_dir, "min_KiB", data->mem_min_kb); + ATTRIBUTE(mem_dir, "max_KiB", data->mem_max_kb); + ATTRIBUTE(mem_dir, "used_KiB", data->mem_used_kb); + ATTRIBUTE(mem_dir, "share_KiB", data->mem_share_kb); + + /* samples */ + samples_dir = hypfs_mkdir(guest_dir, "samples"); + if (IS_ERR(samples_dir)) + return PTR_ERR(samples_dir); + ATTRIBUTE(samples_dir, "cpu_using", data->cpu_use_samp); + ATTRIBUTE(samples_dir, "cpu_delay", data->cpu_delay_samp); + ATTRIBUTE(samples_dir, "mem_delay", data->page_wait_samp); + ATTRIBUTE(samples_dir, "idle", data->idle_samp); + ATTRIBUTE(samples_dir, "other", data->other_samp); + ATTRIBUTE(samples_dir, "total", data->total_samp); + return 0; +} + +int hypfs_vm_create_files(struct dentry *root) +{ + struct dentry *dir, *file; + struct diag2fc_data *data; + unsigned int count = 0; + int rc, i; + + data = diag2fc_store(diag2fc_guest_query, &count, 0); + if (IS_ERR(data)) + return PTR_ERR(data); + + /* Hypervisor Info */ + dir = hypfs_mkdir(root, "hyp"); + if (IS_ERR(dir)) { + rc = PTR_ERR(dir); + goto failed; + } + file = hypfs_create_str(dir, "type", "z/VM Hypervisor"); + if (IS_ERR(file)) { + rc = PTR_ERR(file); + goto failed; + } + + /* physical cpus */ + dir = hypfs_mkdir(root, "cpus"); + if (IS_ERR(dir)) { + rc = PTR_ERR(dir); + goto failed; + } + file = hypfs_create_u64(dir, "count", data->lcpus); + if (IS_ERR(file)) { + rc = PTR_ERR(file); + goto failed; + } + + /* guests */ + dir = hypfs_mkdir(root, "systems"); + if (IS_ERR(dir)) { + rc = PTR_ERR(dir); + goto failed; + } + + for (i = 0; i < count; i++) { + rc = hypfs_vm_create_guest(dir, &data[i]); + if (rc) + goto failed; + } + diag2fc_free(data); + return 0; + +failed: + diag2fc_free(data); + return rc; +} diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c index 5feef8da406b..ada83149932f 100644 --- a/arch/s390/hypfs/inode.c +++ b/arch/s390/hypfs/inode.c @@ -460,45 +460,18 @@ static const struct super_operations hypfs_s_ops = { .show_options = hypfs_show_options, }; -static int __init hypfs_init(void) +int __init __hypfs_fs_init(void) { int rc; - hypfs_dbfs_init(); - - if (hypfs_diag_init()) { - rc = -ENODATA; - goto fail_dbfs_exit; - } - if (hypfs_vm_init()) { - rc = -ENODATA; - goto fail_hypfs_diag_exit; - } - hypfs_sprp_init(); - if (hypfs_diag0c_init()) { - rc = -ENODATA; - goto fail_hypfs_sprp_exit; - } rc = sysfs_create_mount_point(hypervisor_kobj, "s390"); if (rc) - goto fail_hypfs_diag0c_exit; + return rc; rc = register_filesystem(&hypfs_type); if (rc) - goto fail_filesystem; + goto fail; return 0; - -fail_filesystem: +fail: sysfs_remove_mount_point(hypervisor_kobj, "s390"); -fail_hypfs_diag0c_exit: - hypfs_diag0c_exit(); -fail_hypfs_sprp_exit: - hypfs_sprp_exit(); - hypfs_vm_exit(); -fail_hypfs_diag_exit: - hypfs_diag_exit(); - pr_err("Initialization of hypfs failed with rc=%i\n", rc); -fail_dbfs_exit: - hypfs_dbfs_exit(); return rc; } -device_initcall(hypfs_init) diff --git a/arch/s390/include/asm/Kbuild b/arch/s390/include/asm/Kbuild index 1a18d7b82f86..4b904110d27c 100644 --- a/arch/s390/include/asm/Kbuild +++ b/arch/s390/include/asm/Kbuild @@ -5,6 +5,5 @@ generated-y += syscall_table.h generated-y += unistd_nr.h generic-y += asm-offsets.h -generic-y += export.h generic-y += kvm_types.h generic-y += mcs_spinlock.h diff --git a/arch/s390/include/asm/debug.h b/arch/s390/include/asm/debug.h index ac665b9670c5..ccd4e148b5ed 100644 --- a/arch/s390/include/asm/debug.h +++ b/arch/s390/include/asm/debug.h @@ -222,7 +222,7 @@ static inline debug_entry_t *debug_text_event(debug_info_t *id, int level, /* * IMPORTANT: Use "%s" in sprintf format strings with care! Only pointers are - * stored in the s390dbf. See Documentation/s390/s390dbf.rst for more details! + * stored in the s390dbf. See Documentation/arch/s390/s390dbf.rst for more details! */ extern debug_entry_t * __debug_sprintf_event(debug_info_t *id, int level, char *string, ...) @@ -350,7 +350,7 @@ static inline debug_entry_t *debug_text_exception(debug_info_t *id, int level, /* * IMPORTANT: Use "%s" in sprintf format strings with care! Only pointers are - * stored in the s390dbf. See Documentation/s390/s390dbf.rst for more details! + * stored in the s390dbf. See Documentation/arch/s390/s390dbf.rst for more details! */ extern debug_entry_t * __debug_sprintf_exception(debug_info_t *id, int level, char *string, ...) diff --git a/arch/s390/include/asm/diag.h b/arch/s390/include/asm/diag.h index 902e0330dd91..bed804137537 100644 --- a/arch/s390/include/asm/diag.h +++ b/arch/s390/include/asm/diag.h @@ -36,6 +36,7 @@ enum diag_stat_enum { DIAG_STAT_X304, DIAG_STAT_X308, DIAG_STAT_X318, + DIAG_STAT_X320, DIAG_STAT_X500, NR_DIAG_STAT }; @@ -108,6 +109,8 @@ enum diag204_sc { DIAG204_SUBC_STIB7 = 7 }; +#define DIAG204_SUBCODE_MASK 0xffff + /* The two available diag 204 data formats */ enum diag204_format { DIAG204_INFO_SIMPLE = 0, diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h index e5c5cb1207e2..5a82b08f03cd 100644 --- a/arch/s390/include/asm/ftrace.h +++ b/arch/s390/include/asm/ftrace.h @@ -54,6 +54,23 @@ static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs * return NULL; } +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +struct fgraph_ret_regs { + unsigned long gpr2; + unsigned long fp; +}; + +static __always_inline unsigned long fgraph_ret_regs_return_value(struct fgraph_ret_regs *ret_regs) +{ + return ret_regs->gpr2; +} + +static __always_inline unsigned long fgraph_ret_regs_frame_pointer(struct fgraph_ret_regs *ret_regs) +{ + return ret_regs->fp; +} +#endif /* CONFIG_FUNCTION_GRAPH_TRACER */ + static __always_inline unsigned long ftrace_regs_get_instruction_pointer(const struct ftrace_regs *fregs) { diff --git a/arch/s390/include/asm/kfence.h b/arch/s390/include/asm/kfence.h index d55ba878378b..e47fd8cbe701 100644 --- a/arch/s390/include/asm/kfence.h +++ b/arch/s390/include/asm/kfence.h @@ -35,7 +35,7 @@ static __always_inline void kfence_split_mapping(void) static inline bool kfence_protect_page(unsigned long addr, bool protect) { - __kernel_map_pages(virt_to_page(addr), 1, !protect); + __kernel_map_pages(virt_to_page((void *)addr), 1, !protect); return true; } diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 2bbc3d54959d..91bfecb91321 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -1028,6 +1028,9 @@ static inline int sie64a(struct kvm_s390_sie_block *sie_block, u64 *rsa) extern char sie_exit; +bool kvm_s390_pv_is_protected(struct kvm *kvm); +bool kvm_s390_pv_cpu_is_protected(struct kvm_vcpu *vcpu); + extern int kvm_s390_gisc_register(struct kvm *kvm, u32 gisc); extern int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc); diff --git a/arch/s390/include/asm/maccess.h b/arch/s390/include/asm/maccess.h index cfec3141fdba..50225940d971 100644 --- a/arch/s390/include/asm/maccess.h +++ b/arch/s390/include/asm/maccess.h @@ -4,6 +4,9 @@ #include <linux/types.h> +#define MEMCPY_REAL_SIZE PAGE_SIZE +#define MEMCPY_REAL_MASK PAGE_MASK + struct iov_iter; extern unsigned long __memcpy_real_area; diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index a9c138fcd2ad..cfec0743314e 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -191,8 +191,16 @@ int arch_make_page_accessible(struct page *page); #define phys_to_page(phys) pfn_to_page(phys_to_pfn(phys)) #define page_to_phys(page) pfn_to_phys(page_to_pfn(page)) -#define pfn_to_virt(pfn) __va(pfn_to_phys(pfn)) -#define virt_to_pfn(kaddr) (phys_to_pfn(__pa(kaddr))) +static inline void *pfn_to_virt(unsigned long pfn) +{ + return __va(pfn_to_phys(pfn)); +} + +static inline unsigned long virt_to_pfn(const void *kaddr) +{ + return phys_to_pfn(__pa(kaddr)); +} + #define pfn_to_kaddr(pfn) pfn_to_virt(pfn) #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) diff --git a/arch/s390/include/asm/pfault.h b/arch/s390/include/asm/pfault.h new file mode 100644 index 000000000000..a1bee4a1e470 --- /dev/null +++ b/arch/s390/include/asm/pfault.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright IBM Corp. 1999, 2023 + */ +#ifndef _ASM_S390_PFAULT_H +#define _ASM_S390_PFAULT_H + +#include <linux/errno.h> + +int __pfault_init(void); +void __pfault_fini(void); + +static inline int pfault_init(void) +{ + if (IS_ENABLED(CONFIG_PFAULT)) + return __pfault_init(); + return -EOPNOTSUPP; +} + +static inline void pfault_fini(void) +{ + if (IS_ENABLED(CONFIG_PFAULT)) + __pfault_fini(); +} + +#endif /* _ASM_S390_PFAULT_H */ diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index c55f3c3365af..30909fe27c24 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -89,8 +89,6 @@ extern unsigned long __bootdata_preserved(VMALLOC_END); extern struct page *__bootdata_preserved(vmemmap); extern unsigned long __bootdata_preserved(vmemmap_size); -#define VMEM_MAX_PHYS ((unsigned long) vmemmap) - extern unsigned long __bootdata_preserved(MODULES_VADDR); extern unsigned long __bootdata_preserved(MODULES_END); #define MODULES_VADDR MODULES_VADDR diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h index dac7da88f61f..5742d23bba13 100644 --- a/arch/s390/include/asm/sclp.h +++ b/arch/s390/include/asm/sclp.h @@ -86,6 +86,7 @@ struct sclp_info { unsigned char has_kss : 1; unsigned char has_gisaf : 1; unsigned char has_diag318 : 1; + unsigned char has_diag320 : 1; unsigned char has_sipl : 1; unsigned char has_sipl_eckd : 1; unsigned char has_dirq : 1; diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h index f191255c60db..b30fe91166e3 100644 --- a/arch/s390/include/asm/setup.h +++ b/arch/s390/include/asm/setup.h @@ -74,6 +74,7 @@ extern unsigned int zlib_dfltcc_support; extern int noexec_disabled; extern unsigned long ident_map_size; +extern unsigned long max_mappable; /* The Write Back bit position in the physaddr is given by the SLPC PCI */ extern unsigned long mio_wb_bit_mask; @@ -117,14 +118,6 @@ extern unsigned int console_irq; #define SET_CONSOLE_VT220 do { console_mode = 4; } while (0) #define SET_CONSOLE_HVC do { console_mode = 5; } while (0) -#ifdef CONFIG_PFAULT -extern int pfault_init(void); -extern void pfault_fini(void); -#else /* CONFIG_PFAULT */ -#define pfault_init() ({-1;}) -#define pfault_fini() do { } while (0) -#endif /* CONFIG_PFAULT */ - #ifdef CONFIG_VMCP void vmcp_cma_reserve(void); #else diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h index d6bb2f4f78d1..d2cd42bb2c26 100644 --- a/arch/s390/include/asm/uv.h +++ b/arch/s390/include/asm/uv.h @@ -463,6 +463,7 @@ static inline int is_prot_virt_host(void) return prot_virt_host; } +int uv_pin_shared(unsigned long paddr); int gmap_make_secure(struct gmap *gmap, unsigned long gaddr, void *uvcb); int gmap_destroy_page(struct gmap *gmap, unsigned long gaddr); int uv_destroy_owned_page(unsigned long paddr); @@ -475,6 +476,11 @@ void setup_uv(void); #define is_prot_virt_host() 0 static inline void setup_uv(void) {} +static inline int uv_pin_shared(unsigned long paddr) +{ + return 0; +} + static inline int uv_destroy_owned_page(unsigned long paddr) { return 0; diff --git a/arch/s390/include/uapi/asm/pkey.h b/arch/s390/include/uapi/asm/pkey.h index 5faf0a1d2c16..5ad76471e73f 100644 --- a/arch/s390/include/uapi/asm/pkey.h +++ b/arch/s390/include/uapi/asm/pkey.h @@ -26,7 +26,7 @@ #define MAXCLRKEYSIZE 32 /* a clear key value may be up to 32 bytes */ #define MAXAESCIPHERKEYSIZE 136 /* our aes cipher keys have always 136 bytes */ #define MINEP11AESKEYBLOBSIZE 256 /* min EP11 AES key blob size */ -#define MAXEP11AESKEYBLOBSIZE 320 /* max EP11 AES key blob size */ +#define MAXEP11AESKEYBLOBSIZE 336 /* max EP11 AES key blob size */ /* Minimum size of a key blob */ #define MINKEYBLOBSIZE SECKEYBLOBSIZE diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index 6b2a051e1f8a..0df2b88cc0da 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -37,9 +37,9 @@ CFLAGS_unwind_bc.o += -fno-optimize-sibling-calls obj-y := head64.o traps.o time.o process.o earlypgm.o early.o setup.o idle.o vtime.o obj-y += processor.o syscall.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o obj-y += debug.o irq.o ipl.o dis.o diag.o vdso.o cpufeature.o -obj-y += sysinfo.o lgr.o os_info.o machine_kexec.o +obj-y += sysinfo.o lgr.o os_info.o obj-y += runtime_instr.o cache.o fpu.o dumpstack.o guarded_storage.o sthyi.o -obj-y += entry.o reipl.o relocate_kernel.o kdebugfs.o alternative.o +obj-y += entry.o reipl.o kdebugfs.o alternative.o obj-y += nospec-branch.o ipl_vmparm.o machine_kexec_reloc.o unwind_bc.o obj-y += smp.o text_amode31.o stacktrace.o abs_lowcore.o @@ -63,12 +63,13 @@ obj-$(CONFIG_RETHOOK) += rethook.o obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o obj-$(CONFIG_FUNCTION_TRACER) += mcount.o obj-$(CONFIG_CRASH_DUMP) += crash_dump.o +obj-$(CONFIG_KEXEC_CORE) += machine_kexec.o relocate_kernel.o obj-$(CONFIG_UPROBES) += uprobes.o obj-$(CONFIG_JUMP_LABEL) += jump_label.o obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file.o kexec_image.o obj-$(CONFIG_KEXEC_FILE) += kexec_elf.o - +obj-$(CONFIG_CERT_STORE) += cert_store.o obj-$(CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT) += ima_arch.o obj-$(CONFIG_PERF_EVENTS) += perf_event.o diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c index 81cf72088041..fa5f6885c74a 100644 --- a/arch/s390/kernel/asm-offsets.c +++ b/arch/s390/kernel/asm-offsets.c @@ -12,6 +12,7 @@ #include <linux/sched.h> #include <linux/purgatory.h> #include <linux/pgtable.h> +#include <linux/ftrace.h> #include <asm/idle.h> #include <asm/gmap.h> #include <asm/stacktrace.h> @@ -177,5 +178,13 @@ int main(void) DEFINE(OLDMEM_SIZE, PARMAREA + offsetof(struct parmarea, oldmem_size)); DEFINE(COMMAND_LINE, PARMAREA + offsetof(struct parmarea, command_line)); DEFINE(MAX_COMMAND_LINE_SIZE, PARMAREA + offsetof(struct parmarea, max_command_line_size)); +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + /* function graph return value tracing */ + OFFSET(__FGRAPH_RET_GPR2, fgraph_ret_regs, gpr2); + OFFSET(__FGRAPH_RET_FP, fgraph_ret_regs, fp); + DEFINE(__FGRAPH_RET_SIZE, sizeof(struct fgraph_ret_regs)); +#endif + OFFSET(__FTRACE_REGS_PT_REGS, ftrace_regs, regs); + DEFINE(__FTRACE_REGS_SIZE, sizeof(struct ftrace_regs)); return 0; } diff --git a/arch/s390/kernel/cert_store.c b/arch/s390/kernel/cert_store.c new file mode 100644 index 000000000000..3986a044eb36 --- /dev/null +++ b/arch/s390/kernel/cert_store.c @@ -0,0 +1,811 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * DIAG 0x320 support and certificate store handling + * + * Copyright IBM Corp. 2023 + * Author(s): Anastasia Eskova <anastasia.eskova@ibm.com> + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/fs.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/key-type.h> +#include <linux/key.h> +#include <linux/keyctl.h> +#include <linux/kobject.h> +#include <linux/module.h> +#include <linux/seq_file.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <crypto/sha2.h> +#include <keys/user-type.h> +#include <asm/debug.h> +#include <asm/diag.h> +#include <asm/ebcdic.h> +#include <asm/sclp.h> + +#define DIAG_MAX_RETRIES 10 + +#define VCE_FLAGS_VALID_MASK 0x80 + +#define ISM_LEN_DWORDS 4 +#define VCSSB_LEN_BYTES 128 +#define VCSSB_LEN_NO_CERTS 4 +#define VCB_LEN_NO_CERTS 64 +#define VC_NAME_LEN_BYTES 64 + +#define CERT_STORE_KEY_TYPE_NAME "cert_store_key" +#define CERT_STORE_KEYRING_NAME "cert_store" + +static debug_info_t *cert_store_dbf; +static debug_info_t *cert_store_hexdump; + +#define pr_dbf_msg(fmt, ...) \ + debug_sprintf_event(cert_store_dbf, 3, fmt "\n", ## __VA_ARGS__) + +enum diag320_subcode { + DIAG320_SUBCODES = 0, + DIAG320_STORAGE = 1, + DIAG320_CERT_BLOCK = 2, +}; + +enum diag320_rc { + DIAG320_RC_OK = 0x0001, + DIAG320_RC_CS_NOMATCH = 0x0306, +}; + +/* Verification Certificates Store Support Block (VCSSB). */ +struct vcssb { + u32 vcssb_length; + u8 pad_0x04[3]; + u8 version; + u8 pad_0x08[8]; + u32 cs_token; + u8 pad_0x14[12]; + u16 total_vc_index_count; + u16 max_vc_index_count; + u8 pad_0x24[28]; + u32 max_vce_length; + u32 max_vcxe_length; + u8 pad_0x48[8]; + u32 max_single_vcb_length; + u32 total_vcb_length; + u32 max_single_vcxb_length; + u32 total_vcxb_length; + u8 pad_0x60[32]; +} __packed __aligned(8); + +/* Verification Certificate Entry (VCE) Header. */ +struct vce_header { + u32 vce_length; + u8 flags; + u8 key_type; + u16 vc_index; + u8 vc_name[VC_NAME_LEN_BYTES]; /* EBCDIC */ + u8 vc_format; + u8 pad_0x49; + u16 key_id_length; + u8 pad_0x4c; + u8 vc_hash_type; + u16 vc_hash_length; + u8 pad_0x50[4]; + u32 vc_length; + u8 pad_0x58[8]; + u16 vc_hash_offset; + u16 vc_offset; + u8 pad_0x64[28]; +} __packed __aligned(4); + +/* Verification Certificate Block (VCB) Header. */ +struct vcb_header { + u32 vcb_input_length; + u8 pad_0x04[4]; + u16 first_vc_index; + u16 last_vc_index; + u32 pad_0x0c; + u32 cs_token; + u8 pad_0x14[12]; + u32 vcb_output_length; + u8 pad_0x24[3]; + u8 version; + u16 stored_vc_count; + u16 remaining_vc_count; + u8 pad_0x2c[20]; +} __packed __aligned(4); + +/* Verification Certificate Block (VCB). */ +struct vcb { + struct vcb_header vcb_hdr; + u8 vcb_buf[]; +} __packed __aligned(4); + +/* Verification Certificate Entry (VCE). */ +struct vce { + struct vce_header vce_hdr; + u8 cert_data_buf[]; +} __packed __aligned(4); + +static void cert_store_key_describe(const struct key *key, struct seq_file *m) +{ + char ascii[VC_NAME_LEN_BYTES + 1]; + + /* + * First 64 bytes of the key description is key name in EBCDIC CP 500. + * Convert it to ASCII for displaying in /proc/keys. + */ + strscpy(ascii, key->description, sizeof(ascii)); + EBCASC_500(ascii, VC_NAME_LEN_BYTES); + seq_puts(m, ascii); + + seq_puts(m, &key->description[VC_NAME_LEN_BYTES]); + if (key_is_positive(key)) + seq_printf(m, ": %u", key->datalen); +} + +/* + * Certificate store key type takes over properties of + * user key but cannot be updated. + */ +static struct key_type key_type_cert_store_key = { + .name = CERT_STORE_KEY_TYPE_NAME, + .preparse = user_preparse, + .free_preparse = user_free_preparse, + .instantiate = generic_key_instantiate, + .revoke = user_revoke, + .destroy = user_destroy, + .describe = cert_store_key_describe, + .read = user_read, +}; + +/* Logging functions. */ +static void pr_dbf_vcb(const struct vcb *b) +{ + pr_dbf_msg("VCB Header:"); + pr_dbf_msg("vcb_input_length: %d", b->vcb_hdr.vcb_input_length); + pr_dbf_msg("first_vc_index: %d", b->vcb_hdr.first_vc_index); + pr_dbf_msg("last_vc_index: %d", b->vcb_hdr.last_vc_index); + pr_dbf_msg("cs_token: %d", b->vcb_hdr.cs_token); + pr_dbf_msg("vcb_output_length: %d", b->vcb_hdr.vcb_output_length); + pr_dbf_msg("version: %d", b->vcb_hdr.version); + pr_dbf_msg("stored_vc_count: %d", b->vcb_hdr.stored_vc_count); + pr_dbf_msg("remaining_vc_count: %d", b->vcb_hdr.remaining_vc_count); +} + +static void pr_dbf_vce(const struct vce *e) +{ + unsigned char vc_name[VC_NAME_LEN_BYTES + 1]; + char log_string[VC_NAME_LEN_BYTES + 40]; + + pr_dbf_msg("VCE Header:"); + pr_dbf_msg("vce_hdr.vce_length: %d", e->vce_hdr.vce_length); + pr_dbf_msg("vce_hdr.flags: %d", e->vce_hdr.flags); + pr_dbf_msg("vce_hdr.key_type: %d", e->vce_hdr.key_type); + pr_dbf_msg("vce_hdr.vc_index: %d", e->vce_hdr.vc_index); + pr_dbf_msg("vce_hdr.vc_format: %d", e->vce_hdr.vc_format); + pr_dbf_msg("vce_hdr.key_id_length: %d", e->vce_hdr.key_id_length); + pr_dbf_msg("vce_hdr.vc_hash_type: %d", e->vce_hdr.vc_hash_type); + pr_dbf_msg("vce_hdr.vc_hash_length: %d", e->vce_hdr.vc_hash_length); + pr_dbf_msg("vce_hdr.vc_hash_offset: %d", e->vce_hdr.vc_hash_offset); + pr_dbf_msg("vce_hdr.vc_length: %d", e->vce_hdr.vc_length); + pr_dbf_msg("vce_hdr.vc_offset: %d", e->vce_hdr.vc_offset); + + /* Certificate name in ASCII. */ + memcpy(vc_name, e->vce_hdr.vc_name, VC_NAME_LEN_BYTES); + EBCASC_500(vc_name, VC_NAME_LEN_BYTES); + vc_name[VC_NAME_LEN_BYTES] = '\0'; + + snprintf(log_string, sizeof(log_string), + "index: %d vce_hdr.vc_name (ASCII): %s", + e->vce_hdr.vc_index, vc_name); + debug_text_event(cert_store_hexdump, 3, log_string); + + /* Certificate data. */ + debug_text_event(cert_store_hexdump, 3, "VCE: Certificate data start"); + debug_event(cert_store_hexdump, 3, (u8 *)e->cert_data_buf, 128); + debug_text_event(cert_store_hexdump, 3, "VCE: Certificate data end"); + debug_event(cert_store_hexdump, 3, + (u8 *)e->cert_data_buf + e->vce_hdr.vce_length - 128, 128); +} + +static void pr_dbf_vcssb(const struct vcssb *s) +{ + debug_text_event(cert_store_hexdump, 3, "DIAG320 Subcode1"); + debug_event(cert_store_hexdump, 3, (u8 *)s, VCSSB_LEN_BYTES); + + pr_dbf_msg("VCSSB:"); + pr_dbf_msg("vcssb_length: %u", s->vcssb_length); + pr_dbf_msg("version: %u", s->version); + pr_dbf_msg("cs_token: %u", s->cs_token); + pr_dbf_msg("total_vc_index_count: %u", s->total_vc_index_count); + pr_dbf_msg("max_vc_index_count: %u", s->max_vc_index_count); + pr_dbf_msg("max_vce_length: %u", s->max_vce_length); + pr_dbf_msg("max_vcxe_length: %u", s->max_vce_length); + pr_dbf_msg("max_single_vcb_length: %u", s->max_single_vcb_length); + pr_dbf_msg("total_vcb_length: %u", s->total_vcb_length); + pr_dbf_msg("max_single_vcxb_length: %u", s->max_single_vcxb_length); + pr_dbf_msg("total_vcxb_length: %u", s->total_vcxb_length); +} + +static int __diag320(unsigned long subcode, void *addr) +{ + union register_pair rp = { .even = (unsigned long)addr, }; + + asm volatile( + " diag %[rp],%[subcode],0x320\n" + "0: nopr %%r7\n" + EX_TABLE(0b, 0b) + : [rp] "+d" (rp.pair) + : [subcode] "d" (subcode) + : "cc", "memory"); + + return rp.odd; +} + +static int diag320(unsigned long subcode, void *addr) +{ + diag_stat_inc(DIAG_STAT_X320); + + return __diag320(subcode, addr); +} + +/* + * Calculate SHA256 hash of the VCE certificate and compare it to hash stored in + * VCE. Return -EINVAL if hashes don't match. + */ +static int check_certificate_hash(const struct vce *vce) +{ + u8 hash[SHA256_DIGEST_SIZE]; + u16 vc_hash_length; + u8 *vce_hash; + + vce_hash = (u8 *)vce + vce->vce_hdr.vc_hash_offset; + vc_hash_length = vce->vce_hdr.vc_hash_length; + sha256((u8 *)vce + vce->vce_hdr.vc_offset, vce->vce_hdr.vc_length, hash); + if (memcmp(vce_hash, hash, vc_hash_length) == 0) + return 0; + + pr_dbf_msg("SHA256 hash of received certificate does not match"); + debug_text_event(cert_store_hexdump, 3, "VCE hash:"); + debug_event(cert_store_hexdump, 3, vce_hash, SHA256_DIGEST_SIZE); + debug_text_event(cert_store_hexdump, 3, "Calculated hash:"); + debug_event(cert_store_hexdump, 3, hash, SHA256_DIGEST_SIZE); + + return -EINVAL; +} + +static int check_certificate_valid(const struct vce *vce) +{ + if (!(vce->vce_hdr.flags & VCE_FLAGS_VALID_MASK)) { + pr_dbf_msg("Certificate entry is invalid"); + return -EINVAL; + } + if (vce->vce_hdr.vc_format != 1) { + pr_dbf_msg("Certificate format is not supported"); + return -EINVAL; + } + if (vce->vce_hdr.vc_hash_type != 1) { + pr_dbf_msg("Hash type is not supported"); + return -EINVAL; + } + + return check_certificate_hash(vce); +} + +static struct key *get_user_session_keyring(void) +{ + key_ref_t us_keyring_ref; + + us_keyring_ref = lookup_user_key(KEY_SPEC_USER_SESSION_KEYRING, + KEY_LOOKUP_CREATE, KEY_NEED_LINK); + if (IS_ERR(us_keyring_ref)) { + pr_dbf_msg("Couldn't get user session keyring: %ld", + PTR_ERR(us_keyring_ref)); + return ERR_PTR(-ENOKEY); + } + key_ref_put(us_keyring_ref); + return key_ref_to_ptr(us_keyring_ref); +} + +/* Invalidate all keys from cert_store keyring. */ +static int invalidate_keyring_keys(struct key *keyring) +{ + unsigned long num_keys, key_index; + size_t keyring_payload_len; + key_serial_t *key_array; + struct key *current_key; + int rc; + + keyring_payload_len = key_type_keyring.read(keyring, NULL, 0); + num_keys = keyring_payload_len / sizeof(key_serial_t); + key_array = kcalloc(num_keys, sizeof(key_serial_t), GFP_KERNEL); + if (!key_array) + return -ENOMEM; + + rc = key_type_keyring.read(keyring, (char *)key_array, keyring_payload_len); + if (rc != keyring_payload_len) { + pr_dbf_msg("Couldn't read keyring payload"); + goto out; + } + + for (key_index = 0; key_index < num_keys; key_index++) { + current_key = key_lookup(key_array[key_index]); + pr_dbf_msg("Invalidating key %08x", current_key->serial); + + key_invalidate(current_key); + key_put(current_key); + rc = key_unlink(keyring, current_key); + if (rc) { + pr_dbf_msg("Couldn't unlink key %08x: %d", current_key->serial, rc); + break; + } + } +out: + kfree(key_array); + return rc; +} + +static struct key *find_cs_keyring(void) +{ + key_ref_t cs_keyring_ref; + struct key *cs_keyring; + + cs_keyring_ref = keyring_search(make_key_ref(get_user_session_keyring(), true), + &key_type_keyring, CERT_STORE_KEYRING_NAME, + false); + if (!IS_ERR(cs_keyring_ref)) { + cs_keyring = key_ref_to_ptr(cs_keyring_ref); + key_ref_put(cs_keyring_ref); + goto found; + } + /* Search default locations: thread, process, session keyrings */ + cs_keyring = request_key(&key_type_keyring, CERT_STORE_KEYRING_NAME, NULL); + if (IS_ERR(cs_keyring)) + return NULL; + key_put(cs_keyring); +found: + return cs_keyring; +} + +static void cleanup_cs_keys(void) +{ + struct key *cs_keyring; + + cs_keyring = find_cs_keyring(); + if (!cs_keyring) + return; + + pr_dbf_msg("Found cert_store keyring. Purging..."); + /* + * Remove cert_store_key_type in case invalidation + * of old cert_store keys failed (= severe error). + */ + if (invalidate_keyring_keys(cs_keyring)) + unregister_key_type(&key_type_cert_store_key); + + keyring_clear(cs_keyring); + key_invalidate(cs_keyring); + key_put(cs_keyring); + key_unlink(get_user_session_keyring(), cs_keyring); +} + +static struct key *create_cs_keyring(void) +{ + static struct key *cs_keyring; + + /* Cleanup previous cs_keyring and all associated keys if any. */ + cleanup_cs_keys(); + cs_keyring = keyring_alloc(CERT_STORE_KEYRING_NAME, GLOBAL_ROOT_UID, + GLOBAL_ROOT_GID, current_cred(), + (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW | KEY_USR_READ, + KEY_ALLOC_NOT_IN_QUOTA | KEY_ALLOC_SET_KEEP, + NULL, get_user_session_keyring()); + if (IS_ERR(cs_keyring)) { + pr_dbf_msg("Can't allocate cert_store keyring"); + return NULL; + } + + pr_dbf_msg("Successfully allocated cert_store keyring: %08x", cs_keyring->serial); + + /* + * In case a previous clean-up ran into an + * error and unregistered key type. + */ + register_key_type(&key_type_cert_store_key); + + return cs_keyring; +} + +/* + * Allocate memory and create key description in format + * [key name in EBCDIC]:[VCE index]:[CS token]. + * Return a pointer to key description or NULL if memory + * allocation failed. Memory should be freed by caller. + */ +static char *get_key_description(struct vcssb *vcssb, const struct vce *vce) +{ + size_t len, name_len; + u32 cs_token; + char *desc; + + cs_token = vcssb->cs_token; + /* Description string contains "%64s:%04u:%08u\0". */ + name_len = sizeof(vce->vce_hdr.vc_name); + len = name_len + 1 + 4 + 1 + 8 + 1; + desc = kmalloc(len, GFP_KERNEL); + if (!desc) + return NULL; + + memcpy(desc, vce->vce_hdr.vc_name, name_len); + sprintf(desc + name_len, ":%04u:%08u", vce->vce_hdr.vc_index, cs_token); + + return desc; +} + +/* + * Create a key of type "cert_store_key" using the data from VCE for key + * payload and key description. Link the key to "cert_store" keyring. + */ +static int create_key_from_vce(struct vcssb *vcssb, struct vce *vce, + struct key *keyring) +{ + key_ref_t newkey; + char *desc; + int rc; + + desc = get_key_description(vcssb, vce); + if (!desc) + return -ENOMEM; + + newkey = key_create_or_update( + make_key_ref(keyring, true), CERT_STORE_KEY_TYPE_NAME, + desc, (u8 *)vce + vce->vce_hdr.vc_offset, + vce->vce_hdr.vc_length, + (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW | KEY_USR_READ, + KEY_ALLOC_NOT_IN_QUOTA); + + rc = PTR_ERR_OR_ZERO(newkey); + if (rc) { + pr_dbf_msg("Couldn't create a key from Certificate Entry (%d)", rc); + rc = -ENOKEY; + goto out; + } + + key_ref_put(newkey); +out: + kfree(desc); + return rc; +} + +/* Get Verification Certificate Storage Size block with DIAG320 subcode2. */ +static int get_vcssb(struct vcssb *vcssb) +{ + int diag320_rc; + + memset(vcssb, 0, sizeof(*vcssb)); + vcssb->vcssb_length = VCSSB_LEN_BYTES; + diag320_rc = diag320(DIAG320_STORAGE, vcssb); + pr_dbf_vcssb(vcssb); + + if (diag320_rc != DIAG320_RC_OK) { + pr_dbf_msg("Diag 320 Subcode 1 returned bad RC: %04x", diag320_rc); + return -EIO; + } + if (vcssb->vcssb_length == VCSSB_LEN_NO_CERTS) { + pr_dbf_msg("No certificates available for current configuration"); + return -ENOKEY; + } + + return 0; +} + +static u32 get_4k_mult_vcb_size(struct vcssb *vcssb) +{ + return round_up(vcssb->max_single_vcb_length, PAGE_SIZE); +} + +/* Fill input fields of single-entry VCB that will be read by LPAR. */ +static void fill_vcb_input(struct vcssb *vcssb, struct vcb *vcb, u16 index) +{ + memset(vcb, 0, sizeof(*vcb)); + vcb->vcb_hdr.vcb_input_length = get_4k_mult_vcb_size(vcssb); + vcb->vcb_hdr.cs_token = vcssb->cs_token; + + /* Request single entry. */ + vcb->vcb_hdr.first_vc_index = index; + vcb->vcb_hdr.last_vc_index = index; +} + +static void extract_vce_from_sevcb(struct vcb *vcb, struct vce *vce) +{ + struct vce *extracted_vce; + + extracted_vce = (struct vce *)vcb->vcb_buf; + memcpy(vce, vcb->vcb_buf, extracted_vce->vce_hdr.vce_length); + pr_dbf_vce(vce); +} + +static int get_sevcb(struct vcssb *vcssb, u16 index, struct vcb *vcb) +{ + int rc, diag320_rc; + + fill_vcb_input(vcssb, vcb, index); + + diag320_rc = diag320(DIAG320_CERT_BLOCK, vcb); + pr_dbf_msg("Diag 320 Subcode2 RC %2x", diag320_rc); + pr_dbf_vcb(vcb); + + switch (diag320_rc) { + case DIAG320_RC_OK: + rc = 0; + if (vcb->vcb_hdr.vcb_output_length == VCB_LEN_NO_CERTS) { + pr_dbf_msg("No certificate entry for index %u", index); + rc = -ENOKEY; + } else if (vcb->vcb_hdr.remaining_vc_count != 0) { + /* Retry on insufficient space. */ + pr_dbf_msg("Couldn't get all requested certificates"); + rc = -EAGAIN; + } + break; + case DIAG320_RC_CS_NOMATCH: + pr_dbf_msg("Certificate Store token mismatch"); + rc = -EAGAIN; + break; + default: + pr_dbf_msg("Diag 320 Subcode2 returned bad rc (0x%4x)", diag320_rc); + rc = -EINVAL; + break; + } + + return rc; +} + +/* + * Allocate memory for single-entry VCB, get VCB via DIAG320 subcode 2 call, + * extract VCE and create a key from its' certificate. + */ +static int create_key_from_sevcb(struct vcssb *vcssb, u16 index, + struct key *keyring) +{ + struct vcb *vcb; + struct vce *vce; + int rc; + + rc = -ENOMEM; + vcb = vmalloc(get_4k_mult_vcb_size(vcssb)); + vce = vmalloc(vcssb->max_single_vcb_length - sizeof(vcb->vcb_hdr)); + if (!vcb || !vce) + goto out; + + rc = get_sevcb(vcssb, index, vcb); + if (rc) + goto out; + + extract_vce_from_sevcb(vcb, vce); + rc = check_certificate_valid(vce); + if (rc) + goto out; + + rc = create_key_from_vce(vcssb, vce, keyring); + if (rc) + goto out; + + pr_dbf_msg("Successfully created key from Certificate Entry %d", index); +out: + vfree(vce); + vfree(vcb); + return rc; +} + +/* + * Request a single-entry VCB for each VCE available for the partition. + * Create a key from it and link it to cert_store keyring. If no keys + * could be created (i.e. VCEs were invalid) return -ENOKEY. + */ +static int add_certificates_to_keyring(struct vcssb *vcssb, struct key *keyring) +{ + int rc, index, count, added; + + count = 0; + added = 0; + /* Certificate Store entries indices start with 1 and have no gaps. */ + for (index = 1; index < vcssb->total_vc_index_count + 1; index++) { + pr_dbf_msg("Creating key from VCE %u", index); + rc = create_key_from_sevcb(vcssb, index, keyring); + count++; + + if (rc == -EAGAIN) + return rc; + + if (rc) + pr_dbf_msg("Creating key from VCE %u failed (%d)", index, rc); + else + added++; + } + + if (added == 0) { + pr_dbf_msg("Processed %d entries. No keys created", count); + return -ENOKEY; + } + + pr_info("Added %d of %d keys to cert_store keyring", added, count); + + /* + * Do not allow to link more keys to certificate store keyring after all + * the VCEs were processed. + */ + rc = keyring_restrict(make_key_ref(keyring, true), NULL, NULL); + if (rc) + pr_dbf_msg("Failed to set restriction to cert_store keyring (%d)", rc); + + return 0; +} + +/* + * Check which DIAG320 subcodes are installed. + * Return -ENOENT if subcodes 1 or 2 are not available. + */ +static int query_diag320_subcodes(void) +{ + unsigned long ism[ISM_LEN_DWORDS]; + int rc; + + rc = diag320(0, ism); + if (rc != DIAG320_RC_OK) { + pr_dbf_msg("DIAG320 subcode query returned %04x", rc); + return -ENOENT; + } + + debug_text_event(cert_store_hexdump, 3, "DIAG320 Subcode 0"); + debug_event(cert_store_hexdump, 3, ism, sizeof(ism)); + + if (!test_bit_inv(1, ism) || !test_bit_inv(2, ism)) { + pr_dbf_msg("Not all required DIAG320 subcodes are installed"); + return -ENOENT; + } + + return 0; +} + +/* + * Check if Certificate Store is supported by the firmware and DIAG320 subcodes + * 1 and 2 are installed. Create cert_store keyring and link all certificates + * available for the current partition to it as "cert_store_key" type + * keys. On refresh or error invalidate cert_store keyring and destroy + * all keys of "cert_store_key" type. + */ +static int fill_cs_keyring(void) +{ + struct key *cs_keyring; + struct vcssb *vcssb; + int rc; + + rc = -ENOMEM; + vcssb = kmalloc(VCSSB_LEN_BYTES, GFP_KERNEL); + if (!vcssb) + goto cleanup_keys; + + rc = -ENOENT; + if (!sclp.has_diag320) { + pr_dbf_msg("Certificate Store is not supported"); + goto cleanup_keys; + } + + rc = query_diag320_subcodes(); + if (rc) + goto cleanup_keys; + + rc = get_vcssb(vcssb); + if (rc) + goto cleanup_keys; + + rc = -ENOMEM; + cs_keyring = create_cs_keyring(); + if (!cs_keyring) + goto cleanup_keys; + + rc = add_certificates_to_keyring(vcssb, cs_keyring); + if (rc) + goto cleanup_cs_keyring; + + goto out; + +cleanup_cs_keyring: + key_put(cs_keyring); +cleanup_keys: + cleanup_cs_keys(); +out: + kfree(vcssb); + return rc; +} + +static DEFINE_MUTEX(cs_refresh_lock); +static int cs_status_val = -1; + +static ssize_t cs_status_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + if (cs_status_val == -1) + return sysfs_emit(buf, "uninitialized\n"); + else if (cs_status_val == 0) + return sysfs_emit(buf, "ok\n"); + + return sysfs_emit(buf, "failed (%d)\n", cs_status_val); +} + +static struct kobj_attribute cs_status_attr = __ATTR_RO(cs_status); + +static ssize_t refresh_store(struct kobject *kobj, struct kobj_attribute *attr, + const char *buf, size_t count) +{ + int rc, retries; + + pr_dbf_msg("Refresh certificate store information requested"); + rc = mutex_lock_interruptible(&cs_refresh_lock); + if (rc) + return rc; + + for (retries = 0; retries < DIAG_MAX_RETRIES; retries++) { + /* Request certificates from certificate store. */ + rc = fill_cs_keyring(); + if (rc) + pr_dbf_msg("Failed to refresh certificate store information (%d)", rc); + if (rc != -EAGAIN) + break; + } + cs_status_val = rc; + mutex_unlock(&cs_refresh_lock); + + return rc ?: count; +} + +static struct kobj_attribute refresh_attr = __ATTR_WO(refresh); + +static const struct attribute *cert_store_attrs[] __initconst = { + &cs_status_attr.attr, + &refresh_attr.attr, + NULL, +}; + +static struct kobject *cert_store_kobj; + +static int __init cert_store_init(void) +{ + int rc = -ENOMEM; + + cert_store_dbf = debug_register("cert_store_msg", 10, 1, 64); + if (!cert_store_dbf) + goto cleanup_dbf; + + cert_store_hexdump = debug_register("cert_store_hexdump", 3, 1, 128); + if (!cert_store_hexdump) + goto cleanup_dbf; + + debug_register_view(cert_store_hexdump, &debug_hex_ascii_view); + debug_register_view(cert_store_dbf, &debug_sprintf_view); + + /* Create directory /sys/firmware/cert_store. */ + cert_store_kobj = kobject_create_and_add("cert_store", firmware_kobj); + if (!cert_store_kobj) + goto cleanup_dbf; + + rc = sysfs_create_files(cert_store_kobj, cert_store_attrs); + if (rc) + goto cleanup_kobj; + + register_key_type(&key_type_cert_store_key); + + return rc; + +cleanup_kobj: + kobject_put(cert_store_kobj); +cleanup_dbf: + debug_unregister(cert_store_dbf); + debug_unregister(cert_store_hexdump); + + return rc; +} +device_initcall(cert_store_init); diff --git a/arch/s390/kernel/diag.c b/arch/s390/kernel/diag.c index 82079f2d8583..f9f06cd8fcee 100644 --- a/arch/s390/kernel/diag.c +++ b/arch/s390/kernel/diag.c @@ -11,6 +11,7 @@ #include <linux/cpu.h> #include <linux/seq_file.h> #include <linux/debugfs.h> +#include <linux/vmalloc.h> #include <asm/asm-extable.h> #include <asm/diag.h> #include <asm/trace/diag.h> @@ -50,6 +51,7 @@ static const struct diag_desc diag_map[NR_DIAG_STAT] = { [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" }, [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" }, [DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" }, + [DIAG_STAT_X320] = { .code = 0x320, .name = "Certificate Store" }, [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" }, }; @@ -167,8 +169,29 @@ static inline int __diag204(unsigned long *subcode, unsigned long size, void *ad return rp.odd; } +/** + * diag204() - Issue diagnose 204 call. + * @subcode: Subcode of diagnose 204 to be executed. + * @size: Size of area in pages which @area points to, if given. + * @addr: Vmalloc'ed memory area where the result is written to. + * + * Execute diagnose 204 with the given subcode and write the result to the + * memory area specified with @addr. For subcodes which do not write a + * result to memory both @size and @addr must be zero. If @addr is + * specified it must be page aligned and must have been allocated with + * vmalloc(). Conversion to real / physical addresses will be handled by + * this function if required. + */ int diag204(unsigned long subcode, unsigned long size, void *addr) { + if (addr) { + if (WARN_ON_ONCE(!is_vmalloc_addr(addr))) + return -1; + if (WARN_ON_ONCE(!IS_ALIGNED((unsigned long)addr, PAGE_SIZE))) + return -1; + } + if ((subcode & DIAG204_SUBCODE_MASK) == DIAG204_SUBC_STIB4) + addr = (void *)pfn_to_phys(vmalloc_to_pfn(addr)); diag_stat_inc(DIAG_STAT_X204); size = __diag204(&subcode, size, addr); if (subcode) @@ -200,7 +223,7 @@ int diag210(struct diag210 *addr) EXPORT_SYMBOL(diag210); /* - * Diagnose 210: Get information about a virtual device + * Diagnose 8C: Access 3270 Display Device Information */ int diag8c(struct diag8c *addr, struct ccw_dev_id *devno) { diff --git a/arch/s390/kernel/ebcdic.c b/arch/s390/kernel/ebcdic.c index 7f8246c9be08..0e51fa537262 100644 --- a/arch/s390/kernel/ebcdic.c +++ b/arch/s390/kernel/ebcdic.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * ECBDIC -> ASCII, ASCII -> ECBDIC, + * EBCDIC -> ASCII, ASCII -> EBCDIC, * upper to lower case (EBCDIC) conversion tables. * * S390 version diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index a660f4b6d654..49a11f6dd7ae 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -8,6 +8,7 @@ * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com), */ +#include <linux/export.h> #include <linux/init.h> #include <linux/linkage.h> #include <asm/asm-extable.h> @@ -26,7 +27,6 @@ #include <asm/vx-insn.h> #include <asm/setup.h> #include <asm/nmi.h> -#include <asm/export.h> #include <asm/nospec-insn.h> _LPP_OFFSET = __LC_LPP diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index 85a00d97a314..05e51666db03 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -266,7 +266,7 @@ static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ struct kobj_attribute *attr, \ const char *buf, size_t len) \ { \ - strncpy(_value, buf, sizeof(_value) - 1); \ + strscpy(_value, buf, sizeof(_value)); \ strim(_value); \ return len; \ } \ @@ -557,15 +557,12 @@ static struct kobj_attribute sys_ipl_ccw_loadparm_attr = __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); static struct attribute *ipl_fcp_attrs[] = { - &sys_ipl_type_attr.attr, &sys_ipl_device_attr.attr, &sys_ipl_fcp_wwpn_attr.attr, &sys_ipl_fcp_lun_attr.attr, &sys_ipl_fcp_bootprog_attr.attr, &sys_ipl_fcp_br_lba_attr.attr, &sys_ipl_ccw_loadparm_attr.attr, - &sys_ipl_secure_attr.attr, - &sys_ipl_has_secure_attr.attr, NULL, }; @@ -575,14 +572,11 @@ static struct attribute_group ipl_fcp_attr_group = { }; static struct attribute *ipl_nvme_attrs[] = { - &sys_ipl_type_attr.attr, &sys_ipl_nvme_fid_attr.attr, &sys_ipl_nvme_nsid_attr.attr, &sys_ipl_nvme_bootprog_attr.attr, &sys_ipl_nvme_br_lba_attr.attr, &sys_ipl_ccw_loadparm_attr.attr, - &sys_ipl_secure_attr.attr, - &sys_ipl_has_secure_attr.attr, NULL, }; @@ -592,13 +586,10 @@ static struct attribute_group ipl_nvme_attr_group = { }; static struct attribute *ipl_eckd_attrs[] = { - &sys_ipl_type_attr.attr, &sys_ipl_eckd_bootprog_attr.attr, &sys_ipl_eckd_br_chr_attr.attr, &sys_ipl_ccw_loadparm_attr.attr, &sys_ipl_device_attr.attr, - &sys_ipl_secure_attr.attr, - &sys_ipl_has_secure_attr.attr, NULL, }; @@ -610,21 +601,15 @@ static struct attribute_group ipl_eckd_attr_group = { /* CCW ipl device attributes */ static struct attribute *ipl_ccw_attrs_vm[] = { - &sys_ipl_type_attr.attr, &sys_ipl_device_attr.attr, &sys_ipl_ccw_loadparm_attr.attr, &sys_ipl_vm_parm_attr.attr, - &sys_ipl_secure_attr.attr, - &sys_ipl_has_secure_attr.attr, NULL, }; static struct attribute *ipl_ccw_attrs_lpar[] = { - &sys_ipl_type_attr.attr, &sys_ipl_device_attr.attr, &sys_ipl_ccw_loadparm_attr.attr, - &sys_ipl_secure_attr.attr, - &sys_ipl_has_secure_attr.attr, NULL, }; @@ -636,15 +621,15 @@ static struct attribute_group ipl_ccw_attr_group_lpar = { .attrs = ipl_ccw_attrs_lpar }; -/* UNKNOWN ipl device attributes */ - -static struct attribute *ipl_unknown_attrs[] = { +static struct attribute *ipl_common_attrs[] = { &sys_ipl_type_attr.attr, + &sys_ipl_secure_attr.attr, + &sys_ipl_has_secure_attr.attr, NULL, }; -static struct attribute_group ipl_unknown_attr_group = { - .attrs = ipl_unknown_attrs, +static struct attribute_group ipl_common_attr_group = { + .attrs = ipl_common_attrs, }; static struct kset *ipl_kset; @@ -668,6 +653,9 @@ static int __init ipl_init(void) rc = -ENOMEM; goto out; } + rc = sysfs_create_group(&ipl_kset->kobj, &ipl_common_attr_group); + if (rc) + goto out; switch (ipl_info.type) { case IPL_TYPE_CCW: if (MACHINE_IS_VM) @@ -689,8 +677,6 @@ static int __init ipl_init(void) rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group); break; default: - rc = sysfs_create_group(&ipl_kset->kobj, - &ipl_unknown_attr_group); break; } out: diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c index 6d9276c096a6..12a2bd4fc88c 100644 --- a/arch/s390/kernel/machine_kexec.c +++ b/arch/s390/kernel/machine_kexec.c @@ -13,6 +13,7 @@ #include <linux/reboot.h> #include <linux/ftrace.h> #include <linux/debug_locks.h> +#include <asm/pfault.h> #include <asm/cio.h> #include <asm/setup.h> #include <asm/smp.h> diff --git a/arch/s390/kernel/machine_kexec_file.c b/arch/s390/kernel/machine_kexec_file.c index 2df94d32140c..8d207b82d9fe 100644 --- a/arch/s390/kernel/machine_kexec_file.c +++ b/arch/s390/kernel/machine_kexec_file.c @@ -188,7 +188,7 @@ static int kexec_file_add_ipl_report(struct kimage *image, data->memsz = ALIGN(data->memsz, PAGE_SIZE); buf.mem = data->memsz; - ptr = (void *)ipl_cert_list_addr; + ptr = __va(ipl_cert_list_addr); end = ptr + ipl_cert_list_size; ncerts = 0; while (ptr < end) { @@ -200,7 +200,7 @@ static int kexec_file_add_ipl_report(struct kimage *image, addr = data->memsz + data->report->size; addr += ncerts * sizeof(struct ipl_rb_certificate_entry); - ptr = (void *)ipl_cert_list_addr; + ptr = __va(ipl_cert_list_addr); while (ptr < end) { len = *(unsigned int *)ptr; ptr += sizeof(len); diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S index dbece2803c50..ae4d4fd9afcd 100644 --- a/arch/s390/kernel/mcount.S +++ b/arch/s390/kernel/mcount.S @@ -9,15 +9,20 @@ #include <asm/ftrace.h> #include <asm/nospec-insn.h> #include <asm/ptrace.h> -#include <asm/export.h> +#define STACK_FRAME_SIZE_PTREGS (STACK_FRAME_OVERHEAD + __PT_SIZE) +#define STACK_PTREGS (STACK_FRAME_OVERHEAD) +#define STACK_PTREGS_GPRS (STACK_PTREGS + __PT_GPRS) +#define STACK_PTREGS_PSW (STACK_PTREGS + __PT_PSW) + +#define STACK_FRAME_SIZE_FREGS (STACK_FRAME_OVERHEAD + __FTRACE_REGS_SIZE) +#define STACK_FREGS (STACK_FRAME_OVERHEAD) +#define STACK_FREGS_PTREGS (STACK_FRAME_OVERHEAD + __FTRACE_REGS_PT_REGS) +#define STACK_FREGS_PTREGS_GPRS (STACK_FREGS_PTREGS + __PT_GPRS) +#define STACK_FREGS_PTREGS_PSW (STACK_FREGS_PTREGS + __PT_PSW) +#define STACK_FREGS_PTREGS_ORIG_GPR2 (STACK_FREGS_PTREGS + __PT_ORIG_GPR2) +#define STACK_FREGS_PTREGS_FLAGS (STACK_FREGS_PTREGS + __PT_FLAGS) -#define STACK_FRAME_SIZE (STACK_FRAME_OVERHEAD + __PT_SIZE) -#define STACK_PTREGS (STACK_FRAME_OVERHEAD) -#define STACK_PTREGS_GPRS (STACK_PTREGS + __PT_GPRS) -#define STACK_PTREGS_PSW (STACK_PTREGS + __PT_PSW) -#define STACK_PTREGS_ORIG_GPR2 (STACK_PTREGS + __PT_ORIG_GPR2) -#define STACK_PTREGS_FLAGS (STACK_PTREGS + __PT_FLAGS) /* packed stack: allocate just enough for r14, r15 and backchain */ #define TRACED_FUNC_FRAME_SIZE 24 @@ -53,23 +58,23 @@ SYM_CODE_END(ftrace_stub_direct_tramp) stg %r1,__SF_BACKCHAIN(%r15) stg %r0,(__SF_GPRS+8*8)(%r15) stg %r15,(__SF_GPRS+9*8)(%r15) - # allocate pt_regs and stack frame for ftrace_trace_function - aghi %r15,-STACK_FRAME_SIZE - stg %r1,(STACK_PTREGS_GPRS+15*8)(%r15) - xc STACK_PTREGS_ORIG_GPR2(8,%r15),STACK_PTREGS_ORIG_GPR2(%r15) + # allocate ftrace_regs and stack frame for ftrace_trace_function + aghi %r15,-STACK_FRAME_SIZE_FREGS + stg %r1,(STACK_FREGS_PTREGS_GPRS+15*8)(%r15) + xc STACK_FREGS_PTREGS_ORIG_GPR2(8,%r15),STACK_FREGS_PTREGS_ORIG_GPR2(%r15) .if \allregs == 1 - stg %r14,(STACK_PTREGS_PSW)(%r15) - mvghi STACK_PTREGS_FLAGS(%r15),_PIF_FTRACE_FULL_REGS + stg %r14,(STACK_FREGS_PTREGS_PSW)(%r15) + mvghi STACK_FREGS_PTREGS_FLAGS(%r15),_PIF_FTRACE_FULL_REGS .else - xc STACK_PTREGS_FLAGS(8,%r15),STACK_PTREGS_FLAGS(%r15) + xc STACK_FREGS_PTREGS_FLAGS(8,%r15),STACK_FREGS_PTREGS_FLAGS(%r15) .endif lg %r14,(__SF_GPRS+8*8)(%r1) # restore original return address aghi %r1,-TRACED_FUNC_FRAME_SIZE stg %r1,__SF_BACKCHAIN(%r15) - stg %r0,(STACK_PTREGS_PSW+8)(%r15) - stmg %r2,%r14,(STACK_PTREGS_GPRS+2*8)(%r15) + stg %r0,(STACK_FREGS_PTREGS_PSW+8)(%r15) + stmg %r2,%r14,(STACK_FREGS_PTREGS_GPRS+2*8)(%r15) .endm SYM_CODE_START(ftrace_regs_caller) @@ -96,30 +101,30 @@ SYM_CODE_START(ftrace_common) lg %r1,0(%r1) #endif lgr %r3,%r14 - la %r5,STACK_PTREGS(%r15) + la %r5,STACK_FREGS(%r15) BASR_EX %r14,%r1 #ifdef CONFIG_FUNCTION_GRAPH_TRACER # The j instruction gets runtime patched to a nop instruction. # See ftrace_enable_ftrace_graph_caller. SYM_INNER_LABEL(ftrace_graph_caller, SYM_L_GLOBAL) j .Lftrace_graph_caller_end - lmg %r2,%r3,(STACK_PTREGS_GPRS+14*8)(%r15) - lg %r4,(STACK_PTREGS_PSW+8)(%r15) + lmg %r2,%r3,(STACK_FREGS_PTREGS_GPRS+14*8)(%r15) + lg %r4,(STACK_FREGS_PTREGS_PSW+8)(%r15) brasl %r14,prepare_ftrace_return - stg %r2,(STACK_PTREGS_GPRS+14*8)(%r15) + stg %r2,(STACK_FREGS_PTREGS_GPRS+14*8)(%r15) .Lftrace_graph_caller_end: #endif - lg %r0,(STACK_PTREGS_PSW+8)(%r15) + lg %r0,(STACK_FREGS_PTREGS_PSW+8)(%r15) #ifdef CONFIG_HAVE_MARCH_Z196_FEATURES - ltg %r1,STACK_PTREGS_ORIG_GPR2(%r15) + ltg %r1,STACK_FREGS_PTREGS_ORIG_GPR2(%r15) locgrz %r1,%r0 #else - lg %r1,STACK_PTREGS_ORIG_GPR2(%r15) + lg %r1,STACK_FREGS_PTREGS_ORIG_GPR2(%r15) ltgr %r1,%r1 jnz 0f lgr %r1,%r0 #endif -0: lmg %r2,%r15,(STACK_PTREGS_GPRS+2*8)(%r15) +0: lmg %r2,%r15,(STACK_FREGS_PTREGS_GPRS+2*8)(%r15) BR_EX %r1 SYM_CODE_END(ftrace_common) @@ -128,10 +133,14 @@ SYM_CODE_END(ftrace_common) SYM_FUNC_START(return_to_handler) stmg %r2,%r5,32(%r15) lgr %r1,%r15 - aghi %r15,-STACK_FRAME_OVERHEAD + aghi %r15,-(STACK_FRAME_OVERHEAD+__FGRAPH_RET_SIZE) stg %r1,__SF_BACKCHAIN(%r15) + la %r3,STACK_FRAME_OVERHEAD(%r15) + stg %r1,__FGRAPH_RET_FP(%r3) + stg %r2,__FGRAPH_RET_GPR2(%r3) + lgr %r2,%r3 brasl %r14,ftrace_return_to_handler - aghi %r15,STACK_FRAME_OVERHEAD + aghi %r15,STACK_FRAME_OVERHEAD+__FGRAPH_RET_SIZE lgr %r14,%r2 lmg %r2,%r5,32(%r15) BR_EX %r14 @@ -160,11 +169,11 @@ SYM_CODE_END(ftrace_shared_hotpatch_trampoline_exrl) SYM_CODE_START(arch_rethook_trampoline) stg %r14,(__SF_GPRS+8*8)(%r15) - lay %r15,-STACK_FRAME_SIZE(%r15) + lay %r15,-STACK_FRAME_SIZE_PTREGS(%r15) stmg %r0,%r14,STACK_PTREGS_GPRS(%r15) # store original stack pointer in backchain and pt_regs - lay %r7,STACK_FRAME_SIZE(%r15) + lay %r7,STACK_FRAME_SIZE_PTREGS(%r15) stg %r7,__SF_BACKCHAIN(%r15) stg %r7,STACK_PTREGS_GPRS+(15*8)(%r15) diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 00d76448319d..c744104e4a9c 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -146,6 +146,7 @@ static u32 __amode31_ref *__ctl_linkage_stack = __ctl_linkage_stack_amode31; static u32 __amode31_ref *__ctl_duct = __ctl_duct_amode31; int __bootdata(noexec_disabled); +unsigned long __bootdata_preserved(max_mappable); unsigned long __bootdata(ident_map_size); struct physmem_info __bootdata(physmem_info); @@ -874,7 +875,7 @@ static void __init log_component_list(void) pr_info("Linux is running with Secure-IPL enabled\n"); else pr_info("Linux is running with Secure-IPL disabled\n"); - ptr = (void *) early_ipl_comp_list_addr; + ptr = __va(early_ipl_comp_list_addr); end = (void *) ptr + early_ipl_comp_list_size; pr_info("The IPL report contains the following components:\n"); while (ptr < end) { diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index f9a2b755f510..a4edb7ea66ea 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -37,6 +37,7 @@ #include <linux/crash_dump.h> #include <linux/kprobes.h> #include <asm/asm-offsets.h> +#include <asm/pfault.h> #include <asm/diag.h> #include <asm/switch_to.h> #include <asm/facility.h> @@ -252,8 +253,9 @@ static void pcpu_free_lowcore(struct pcpu *pcpu) static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu) { - struct lowcore *lc = lowcore_ptr[cpu]; + struct lowcore *lc, *abs_lc; + lc = lowcore_ptr[cpu]; cpumask_set_cpu(cpu, &init_mm.context.cpu_attach_mask); cpumask_set_cpu(cpu, mm_cpumask(&init_mm)); lc->cpu_nr = cpu; @@ -266,7 +268,9 @@ static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu) lc->machine_flags = S390_lowcore.machine_flags; lc->user_timer = lc->system_timer = lc->steal_timer = lc->avg_steal_timer = 0; - __ctl_store(lc->cregs_save_area, 0, 15); + abs_lc = get_abs_lowcore(); + memcpy(lc->cregs_save_area, abs_lc->cregs_save_area, sizeof(lc->cregs_save_area)); + put_abs_lowcore(abs_lc); lc->cregs_save_area[1] = lc->kernel_asce; lc->cregs_save_area[7] = lc->user_asce; save_access_regs((unsigned int *) lc->access_regs_save_area); @@ -606,8 +610,8 @@ void smp_ctl_set_clear_bit(int cr, int bit, bool set) ctlreg = (ctlreg & parms.andval) | parms.orval; abs_lc->cregs_save_area[cr] = ctlreg; put_abs_lowcore(abs_lc); - spin_unlock(&ctl_lock); on_each_cpu(smp_ctl_bit_callback, &parms, 1); + spin_unlock(&ctl_lock); } EXPORT_SYMBOL(smp_ctl_set_clear_bit); @@ -927,12 +931,18 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle) rc = pcpu_alloc_lowcore(pcpu, cpu); if (rc) return rc; + /* + * Make sure global control register contents do not change + * until new CPU has initialized control registers. + */ + spin_lock(&ctl_lock); pcpu_prepare_secondary(pcpu, cpu); pcpu_attach_task(pcpu, tidle); pcpu_start_fn(pcpu, smp_start_secondary, NULL); /* Wait until cpu puts itself in the online & active maps */ while (!cpu_online(cpu)) cpu_relax(); + spin_unlock(&ctl_lock); return 0; } diff --git a/arch/s390/kernel/sthyi.c b/arch/s390/kernel/sthyi.c index 2ea7f208f0e7..30bb20461db4 100644 --- a/arch/s390/kernel/sthyi.c +++ b/arch/s390/kernel/sthyi.c @@ -317,7 +317,9 @@ static void fill_diag(struct sthyi_sctns *sctns) if (pages <= 0) return; - diag204_buf = vmalloc(array_size(pages, PAGE_SIZE)); + diag204_buf = __vmalloc_node(array_size(pages, PAGE_SIZE), + PAGE_SIZE, GFP_KERNEL, NUMA_NO_NODE, + __builtin_return_address(0)); if (!diag204_buf) return; diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index 66f0eb1c872b..b771f1b4cdd1 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -88,7 +88,7 @@ fail: * Requests the Ultravisor to pin the page in the shared state. This will * cause an intercept when the guest attempts to unshare the pinned page. */ -static int uv_pin_shared(unsigned long paddr) +int uv_pin_shared(unsigned long paddr) { struct uv_cb_cfs uvcb = { .header.cmd = UVC_CMD_PIN_PAGE_SHARED, @@ -100,6 +100,7 @@ static int uv_pin_shared(unsigned long paddr) return -EINVAL; return 0; } +EXPORT_SYMBOL_GPL(uv_pin_shared); /* * Requests the Ultravisor to destroy a guest page and make it diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 0261d42c7d01..a7ea80cfa445 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -270,18 +270,6 @@ static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu) return vcpu->arch.pv.handle; } -static inline bool kvm_s390_pv_is_protected(struct kvm *kvm) -{ - lockdep_assert_held(&kvm->lock); - return !!kvm_s390_pv_get_handle(kvm); -} - -static inline bool kvm_s390_pv_cpu_is_protected(struct kvm_vcpu *vcpu) -{ - lockdep_assert_held(&vcpu->mutex); - return !!kvm_s390_pv_cpu_get_handle(vcpu); -} - /* implemented in interrupt.c */ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); diff --git a/arch/s390/kvm/pv.c b/arch/s390/kvm/pv.c index bf1fdc7bf89e..8d3f39a8a11e 100644 --- a/arch/s390/kvm/pv.c +++ b/arch/s390/kvm/pv.c @@ -18,6 +18,20 @@ #include <linux/mmu_notifier.h> #include "kvm-s390.h" +bool kvm_s390_pv_is_protected(struct kvm *kvm) +{ + lockdep_assert_held(&kvm->lock); + return !!kvm_s390_pv_get_handle(kvm); +} +EXPORT_SYMBOL_GPL(kvm_s390_pv_is_protected); + +bool kvm_s390_pv_cpu_is_protected(struct kvm_vcpu *vcpu) +{ + lockdep_assert_held(&vcpu->mutex); + return !!kvm_s390_pv_cpu_get_handle(vcpu); +} +EXPORT_SYMBOL_GPL(kvm_s390_pv_cpu_is_protected); + /** * struct pv_vm_to_be_destroyed - Represents a protected VM that needs to * be destroyed diff --git a/arch/s390/lib/mem.S b/arch/s390/lib/mem.S index 5a9a55de2e10..08f60a42b9a6 100644 --- a/arch/s390/lib/mem.S +++ b/arch/s390/lib/mem.S @@ -5,8 +5,8 @@ * Copyright IBM Corp. 2012 */ +#include <linux/export.h> #include <linux/linkage.h> -#include <asm/export.h> #include <asm/nospec-insn.h> GEN_BR_THUNK %r14 diff --git a/arch/s390/lib/tishift.S b/arch/s390/lib/tishift.S index de33cf02cfd2..96214f51f49b 100644 --- a/arch/s390/lib/tishift.S +++ b/arch/s390/lib/tishift.S @@ -1,8 +1,8 @@ /* SPDX-License-Identifier: GPL-2.0 */ +#include <linux/export.h> #include <linux/linkage.h> #include <asm/nospec-insn.h> -#include <asm/export.h> .section .noinstr.text, "ax" diff --git a/arch/s390/mm/Makefile b/arch/s390/mm/Makefile index d90db06a8af5..352ff520fd94 100644 --- a/arch/s390/mm/Makefile +++ b/arch/s390/mm/Makefile @@ -10,3 +10,4 @@ obj-$(CONFIG_CMM) += cmm.o obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o obj-$(CONFIG_PTDUMP_CORE) += dump_pagetables.o obj-$(CONFIG_PGSTE) += gmap.o +obj-$(CONFIG_PFAULT) += pfault.o diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c index 5300c6867d5e..f47515313226 100644 --- a/arch/s390/mm/cmm.c +++ b/arch/s390/mm/cmm.c @@ -90,7 +90,7 @@ static long cmm_alloc_pages(long nr, long *counter, } else free_page((unsigned long) npa); } - diag10_range(virt_to_pfn(addr), 1); + diag10_range(virt_to_pfn((void *)addr), 1); pa->pages[pa->index++] = addr; (*counter)++; spin_unlock(&cmm_lock); diff --git a/arch/s390/mm/dump_pagetables.c b/arch/s390/mm/dump_pagetables.c index ba5f80268878..afa5db750d92 100644 --- a/arch/s390/mm/dump_pagetables.c +++ b/arch/s390/mm/dump_pagetables.c @@ -297,7 +297,7 @@ static int pt_dump_init(void) address_markers[ABS_LOWCORE_NR].start_address = __abs_lowcore; address_markers[ABS_LOWCORE_END_NR].start_address = __abs_lowcore + ABS_LOWCORE_MAP_SIZE; address_markers[MEMCPY_REAL_NR].start_address = __memcpy_real_area; - address_markers[MEMCPY_REAL_END_NR].start_address = __memcpy_real_area + PAGE_SIZE; + address_markers[MEMCPY_REAL_END_NR].start_address = __memcpy_real_area + MEMCPY_REAL_SIZE; address_markers[VMEMMAP_NR].start_address = (unsigned long) vmemmap; address_markers[VMEMMAP_END_NR].start_address = (unsigned long)vmemmap + vmemmap_size; address_markers[VMALLOC_NR].start_address = VMALLOC_START; diff --git a/arch/s390/mm/extmem.c b/arch/s390/mm/extmem.c index 1bc42ce26599..e41869f5cc95 100644 --- a/arch/s390/mm/extmem.c +++ b/arch/s390/mm/extmem.c @@ -640,10 +640,13 @@ void segment_warning(int rc, char *seg_name) pr_err("There is not enough memory to load or query " "DCSS %s\n", seg_name); break; - case -ERANGE: - pr_err("DCSS %s exceeds the kernel mapping range (%lu) " - "and cannot be loaded\n", seg_name, VMEM_MAX_PHYS); + case -ERANGE: { + struct range mhp_range = arch_get_mappable_range(); + + pr_err("DCSS %s exceeds the kernel mapping range (%llu) " + "and cannot be loaded\n", seg_name, mhp_range.end + 1); break; + } default: break; } diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index 2f123429a291..b5e1bea9194c 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -43,8 +43,6 @@ #include "../kernel/entry.h" #define __FAIL_ADDR_MASK -4096L -#define __SUBCODE_MASK 0x0600 -#define __PF_RES_FIELD 0x8000000000000000ULL /* * Allocate private vm_fault_reason from top. Please make sure it won't @@ -583,232 +581,6 @@ void do_dat_exception(struct pt_regs *regs) } NOKPROBE_SYMBOL(do_dat_exception); -#ifdef CONFIG_PFAULT -/* - * 'pfault' pseudo page faults routines. - */ -static int pfault_disable; - -static int __init nopfault(char *str) -{ - pfault_disable = 1; - return 1; -} - -__setup("nopfault", nopfault); - -struct pfault_refbk { - u16 refdiagc; - u16 reffcode; - u16 refdwlen; - u16 refversn; - u64 refgaddr; - u64 refselmk; - u64 refcmpmk; - u64 reserved; -} __attribute__ ((packed, aligned(8))); - -static struct pfault_refbk pfault_init_refbk = { - .refdiagc = 0x258, - .reffcode = 0, - .refdwlen = 5, - .refversn = 2, - .refgaddr = __LC_LPP, - .refselmk = 1ULL << 48, - .refcmpmk = 1ULL << 48, - .reserved = __PF_RES_FIELD -}; - -int pfault_init(void) -{ - int rc; - - if (pfault_disable) - return -1; - diag_stat_inc(DIAG_STAT_X258); - asm volatile( - " diag %1,%0,0x258\n" - "0: j 2f\n" - "1: la %0,8\n" - "2:\n" - EX_TABLE(0b,1b) - : "=d" (rc) - : "a" (&pfault_init_refbk), "m" (pfault_init_refbk) : "cc"); - return rc; -} - -static struct pfault_refbk pfault_fini_refbk = { - .refdiagc = 0x258, - .reffcode = 1, - .refdwlen = 5, - .refversn = 2, -}; - -void pfault_fini(void) -{ - - if (pfault_disable) - return; - diag_stat_inc(DIAG_STAT_X258); - asm volatile( - " diag %0,0,0x258\n" - "0: nopr %%r7\n" - EX_TABLE(0b,0b) - : : "a" (&pfault_fini_refbk), "m" (pfault_fini_refbk) : "cc"); -} - -static DEFINE_SPINLOCK(pfault_lock); -static LIST_HEAD(pfault_list); - -#define PF_COMPLETE 0x0080 - -/* - * The mechanism of our pfault code: if Linux is running as guest, runs a user - * space process and the user space process accesses a page that the host has - * paged out we get a pfault interrupt. - * - * This allows us, within the guest, to schedule a different process. Without - * this mechanism the host would have to suspend the whole virtual cpu until - * the page has been paged in. - * - * So when we get such an interrupt then we set the state of the current task - * to uninterruptible and also set the need_resched flag. Both happens within - * interrupt context(!). If we later on want to return to user space we - * recognize the need_resched flag and then call schedule(). It's not very - * obvious how this works... - * - * Of course we have a lot of additional fun with the completion interrupt (-> - * host signals that a page of a process has been paged in and the process can - * continue to run). This interrupt can arrive on any cpu and, since we have - * virtual cpus, actually appear before the interrupt that signals that a page - * is missing. - */ -static void pfault_interrupt(struct ext_code ext_code, - unsigned int param32, unsigned long param64) -{ - struct task_struct *tsk; - __u16 subcode; - pid_t pid; - - /* - * Get the external interruption subcode & pfault initial/completion - * signal bit. VM stores this in the 'cpu address' field associated - * with the external interrupt. - */ - subcode = ext_code.subcode; - if ((subcode & 0xff00) != __SUBCODE_MASK) - return; - inc_irq_stat(IRQEXT_PFL); - /* Get the token (= pid of the affected task). */ - pid = param64 & LPP_PID_MASK; - rcu_read_lock(); - tsk = find_task_by_pid_ns(pid, &init_pid_ns); - if (tsk) - get_task_struct(tsk); - rcu_read_unlock(); - if (!tsk) - return; - spin_lock(&pfault_lock); - if (subcode & PF_COMPLETE) { - /* signal bit is set -> a page has been swapped in by VM */ - if (tsk->thread.pfault_wait == 1) { - /* Initial interrupt was faster than the completion - * interrupt. pfault_wait is valid. Set pfault_wait - * back to zero and wake up the process. This can - * safely be done because the task is still sleeping - * and can't produce new pfaults. */ - tsk->thread.pfault_wait = 0; - list_del(&tsk->thread.list); - wake_up_process(tsk); - put_task_struct(tsk); - } else { - /* Completion interrupt was faster than initial - * interrupt. Set pfault_wait to -1 so the initial - * interrupt doesn't put the task to sleep. - * If the task is not running, ignore the completion - * interrupt since it must be a leftover of a PFAULT - * CANCEL operation which didn't remove all pending - * completion interrupts. */ - if (task_is_running(tsk)) - tsk->thread.pfault_wait = -1; - } - } else { - /* signal bit not set -> a real page is missing. */ - if (WARN_ON_ONCE(tsk != current)) - goto out; - if (tsk->thread.pfault_wait == 1) { - /* Already on the list with a reference: put to sleep */ - goto block; - } else if (tsk->thread.pfault_wait == -1) { - /* Completion interrupt was faster than the initial - * interrupt (pfault_wait == -1). Set pfault_wait - * back to zero and exit. */ - tsk->thread.pfault_wait = 0; - } else { - /* Initial interrupt arrived before completion - * interrupt. Let the task sleep. - * An extra task reference is needed since a different - * cpu may set the task state to TASK_RUNNING again - * before the scheduler is reached. */ - get_task_struct(tsk); - tsk->thread.pfault_wait = 1; - list_add(&tsk->thread.list, &pfault_list); -block: - /* Since this must be a userspace fault, there - * is no kernel task state to trample. Rely on the - * return to userspace schedule() to block. */ - __set_current_state(TASK_UNINTERRUPTIBLE); - set_tsk_need_resched(tsk); - set_preempt_need_resched(); - } - } -out: - spin_unlock(&pfault_lock); - put_task_struct(tsk); -} - -static int pfault_cpu_dead(unsigned int cpu) -{ - struct thread_struct *thread, *next; - struct task_struct *tsk; - - spin_lock_irq(&pfault_lock); - list_for_each_entry_safe(thread, next, &pfault_list, list) { - thread->pfault_wait = 0; - list_del(&thread->list); - tsk = container_of(thread, struct task_struct, thread); - wake_up_process(tsk); - put_task_struct(tsk); - } - spin_unlock_irq(&pfault_lock); - return 0; -} - -static int __init pfault_irq_init(void) -{ - int rc; - - rc = register_external_irq(EXT_IRQ_CP_SERVICE, pfault_interrupt); - if (rc) - goto out_extint; - rc = pfault_init() == 0 ? 0 : -EOPNOTSUPP; - if (rc) - goto out_pfault; - irq_subclass_register(IRQ_SUBCLASS_SERVICE_SIGNAL); - cpuhp_setup_state_nocalls(CPUHP_S390_PFAULT_DEAD, "s390/pfault:dead", - NULL, pfault_cpu_dead); - return 0; - -out_pfault: - unregister_external_irq(EXT_IRQ_CP_SERVICE, pfault_interrupt); -out_extint: - pfault_disable = 1; - return rc; -} -early_initcall(pfault_irq_init); - -#endif /* CONFIG_PFAULT */ - #if IS_ENABLED(CONFIG_PGSTE) void do_secure_storage_access(struct pt_regs *regs) diff --git a/arch/s390/mm/maccess.c b/arch/s390/mm/maccess.c index cbe1df1e9c18..c805b3e2592b 100644 --- a/arch/s390/mm/maccess.c +++ b/arch/s390/mm/maccess.c @@ -86,11 +86,12 @@ size_t memcpy_real_iter(struct iov_iter *iter, unsigned long src, size_t count) void *chunk; pte_t pte; + BUILD_BUG_ON(MEMCPY_REAL_SIZE != PAGE_SIZE); while (count) { - phys = src & PAGE_MASK; - offset = src & ~PAGE_MASK; + phys = src & MEMCPY_REAL_MASK; + offset = src & ~MEMCPY_REAL_MASK; chunk = (void *)(__memcpy_real_area + offset); - len = min(count, PAGE_SIZE - offset); + len = min(count, MEMCPY_REAL_SIZE - offset); pte = mk_pte_phys(phys, PAGE_KERNEL_RO); mutex_lock(&memcpy_real_mutex); diff --git a/arch/s390/mm/pfault.c b/arch/s390/mm/pfault.c new file mode 100644 index 000000000000..1aac13bb8f53 --- /dev/null +++ b/arch/s390/mm/pfault.c @@ -0,0 +1,248 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright IBM Corp. 1999, 2023 + */ + +#include <linux/cpuhotplug.h> +#include <linux/sched/task.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/irq.h> +#include <asm/asm-extable.h> +#include <asm/pfault.h> +#include <asm/diag.h> + +#define __SUBCODE_MASK 0x0600 +#define __PF_RES_FIELD 0x8000000000000000UL + +/* + * 'pfault' pseudo page faults routines. + */ +static int pfault_disable; + +static int __init nopfault(char *str) +{ + pfault_disable = 1; + return 1; +} +early_param("nopfault", nopfault); + +struct pfault_refbk { + u16 refdiagc; + u16 reffcode; + u16 refdwlen; + u16 refversn; + u64 refgaddr; + u64 refselmk; + u64 refcmpmk; + u64 reserved; +}; + +static struct pfault_refbk pfault_init_refbk = { + .refdiagc = 0x258, + .reffcode = 0, + .refdwlen = 5, + .refversn = 2, + .refgaddr = __LC_LPP, + .refselmk = 1UL << 48, + .refcmpmk = 1UL << 48, + .reserved = __PF_RES_FIELD +}; + +int __pfault_init(void) +{ + int rc = -EOPNOTSUPP; + + if (pfault_disable) + return rc; + diag_stat_inc(DIAG_STAT_X258); + asm volatile( + " diag %[refbk],%[rc],0x258\n" + "0: nopr %%r7\n" + EX_TABLE(0b, 0b) + : [rc] "+d" (rc) + : [refbk] "a" (&pfault_init_refbk), "m" (pfault_init_refbk) + : "cc"); + return rc; +} + +static struct pfault_refbk pfault_fini_refbk = { + .refdiagc = 0x258, + .reffcode = 1, + .refdwlen = 5, + .refversn = 2, +}; + +void __pfault_fini(void) +{ + if (pfault_disable) + return; + diag_stat_inc(DIAG_STAT_X258); + asm volatile( + " diag %[refbk],0,0x258\n" + "0: nopr %%r7\n" + EX_TABLE(0b, 0b) + : + : [refbk] "a" (&pfault_fini_refbk), "m" (pfault_fini_refbk) + : "cc"); +} + +static DEFINE_SPINLOCK(pfault_lock); +static LIST_HEAD(pfault_list); + +#define PF_COMPLETE 0x0080 + +/* + * The mechanism of our pfault code: if Linux is running as guest, runs a user + * space process and the user space process accesses a page that the host has + * paged out we get a pfault interrupt. + * + * This allows us, within the guest, to schedule a different process. Without + * this mechanism the host would have to suspend the whole virtual cpu until + * the page has been paged in. + * + * So when we get such an interrupt then we set the state of the current task + * to uninterruptible and also set the need_resched flag. Both happens within + * interrupt context(!). If we later on want to return to user space we + * recognize the need_resched flag and then call schedule(). It's not very + * obvious how this works... + * + * Of course we have a lot of additional fun with the completion interrupt (-> + * host signals that a page of a process has been paged in and the process can + * continue to run). This interrupt can arrive on any cpu and, since we have + * virtual cpus, actually appear before the interrupt that signals that a page + * is missing. + */ +static void pfault_interrupt(struct ext_code ext_code, + unsigned int param32, unsigned long param64) +{ + struct task_struct *tsk; + __u16 subcode; + pid_t pid; + + /* + * Get the external interruption subcode & pfault initial/completion + * signal bit. VM stores this in the 'cpu address' field associated + * with the external interrupt. + */ + subcode = ext_code.subcode; + if ((subcode & 0xff00) != __SUBCODE_MASK) + return; + inc_irq_stat(IRQEXT_PFL); + /* Get the token (= pid of the affected task). */ + pid = param64 & LPP_PID_MASK; + rcu_read_lock(); + tsk = find_task_by_pid_ns(pid, &init_pid_ns); + if (tsk) + get_task_struct(tsk); + rcu_read_unlock(); + if (!tsk) + return; + spin_lock(&pfault_lock); + if (subcode & PF_COMPLETE) { + /* signal bit is set -> a page has been swapped in by VM */ + if (tsk->thread.pfault_wait == 1) { + /* + * Initial interrupt was faster than the completion + * interrupt. pfault_wait is valid. Set pfault_wait + * back to zero and wake up the process. This can + * safely be done because the task is still sleeping + * and can't produce new pfaults. + */ + tsk->thread.pfault_wait = 0; + list_del(&tsk->thread.list); + wake_up_process(tsk); + put_task_struct(tsk); + } else { + /* + * Completion interrupt was faster than initial + * interrupt. Set pfault_wait to -1 so the initial + * interrupt doesn't put the task to sleep. + * If the task is not running, ignore the completion + * interrupt since it must be a leftover of a PFAULT + * CANCEL operation which didn't remove all pending + * completion interrupts. + */ + if (task_is_running(tsk)) + tsk->thread.pfault_wait = -1; + } + } else { + /* signal bit not set -> a real page is missing. */ + if (WARN_ON_ONCE(tsk != current)) + goto out; + if (tsk->thread.pfault_wait == 1) { + /* Already on the list with a reference: put to sleep */ + goto block; + } else if (tsk->thread.pfault_wait == -1) { + /* + * Completion interrupt was faster than the initial + * interrupt (pfault_wait == -1). Set pfault_wait + * back to zero and exit. + */ + tsk->thread.pfault_wait = 0; + } else { + /* + * Initial interrupt arrived before completion + * interrupt. Let the task sleep. + * An extra task reference is needed since a different + * cpu may set the task state to TASK_RUNNING again + * before the scheduler is reached. + */ + get_task_struct(tsk); + tsk->thread.pfault_wait = 1; + list_add(&tsk->thread.list, &pfault_list); +block: + /* + * Since this must be a userspace fault, there + * is no kernel task state to trample. Rely on the + * return to userspace schedule() to block. + */ + __set_current_state(TASK_UNINTERRUPTIBLE); + set_tsk_need_resched(tsk); + set_preempt_need_resched(); + } + } +out: + spin_unlock(&pfault_lock); + put_task_struct(tsk); +} + +static int pfault_cpu_dead(unsigned int cpu) +{ + struct thread_struct *thread, *next; + struct task_struct *tsk; + + spin_lock_irq(&pfault_lock); + list_for_each_entry_safe(thread, next, &pfault_list, list) { + thread->pfault_wait = 0; + list_del(&thread->list); + tsk = container_of(thread, struct task_struct, thread); + wake_up_process(tsk); + put_task_struct(tsk); + } + spin_unlock_irq(&pfault_lock); + return 0; +} + +static int __init pfault_irq_init(void) +{ + int rc; + + rc = register_external_irq(EXT_IRQ_CP_SERVICE, pfault_interrupt); + if (rc) + goto out_extint; + rc = pfault_init() == 0 ? 0 : -EOPNOTSUPP; + if (rc) + goto out_pfault; + irq_subclass_register(IRQ_SUBCLASS_SERVICE_SIGNAL); + cpuhp_setup_state_nocalls(CPUHP_S390_PFAULT_DEAD, "s390/pfault:dead", + NULL, pfault_cpu_dead); + return 0; + +out_pfault: + unregister_external_irq(EXT_IRQ_CP_SERVICE, pfault_interrupt); +out_extint: + pfault_disable = 1; + return rc; +} +early_initcall(pfault_irq_init); diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index 24a66670f5c3..e44243b9c0a4 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -36,7 +36,7 @@ static void vmem_free_pages(unsigned long addr, int order) { /* We don't expect boot memory to be removed ever. */ if (!slab_is_available() || - WARN_ON_ONCE(PageReserved(virt_to_page(addr)))) + WARN_ON_ONCE(PageReserved(virt_to_page((void *)addr)))) return; free_pages(addr, order); } @@ -531,7 +531,7 @@ struct range arch_get_mappable_range(void) struct range mhp_range; mhp_range.start = 0; - mhp_range.end = VMEM_MAX_PHYS - 1; + mhp_range.end = max_mappable - 1; return mhp_range; } diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c index ee367798e388..ee90a91ed888 100644 --- a/arch/s390/pci/pci_clp.c +++ b/arch/s390/pci/pci_clp.c @@ -666,9 +666,4 @@ static struct miscdevice clp_misc_device = { .fops = &clp_misc_fops, }; -static int __init clp_misc_init(void) -{ - return misc_register(&clp_misc_device); -} - -device_initcall(clp_misc_init); +builtin_misc_device(clp_misc_device); |