diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-11 18:03:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-11 18:03:54 -0800 |
| commit | 6b00f7efb5303418c231994c91fb8239f5ada260 (patch) | |
| tree | 1daba87ccda34e632ea39dedc5055391c7e94bdc /arch | |
| parent | b3d6524ff7956c5a898d51a18eaecb62a60a2b84 (diff) | |
| parent | d476d94f180af3f0fca77394651d4a98f4df1c54 (diff) | |
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Catalin Marinas:
"arm64 updates for 3.20:
- reimplementation of the virtual remapping of UEFI Runtime Services
in a way that is stable across kexec
- emulation of the "setend" instruction for 32-bit tasks (user
endianness switching trapped in the kernel, SCTLR_EL1.E0E bit set
accordingly)
- compat_sys_call_table implemented in C (from asm) and made it a
constant array together with sys_call_table
- export CPU cache information via /sys (like other architectures)
- DMA API implementation clean-up in preparation for IOMMU support
- macros clean-up for KVM
- dropped some unnecessary cache+tlb maintenance
- CONFIG_ARM64_CPU_SUSPEND clean-up
- defconfig update (CPU_IDLE)
The EFI changes going via the arm64 tree have been acked by Matt
Fleming. There is also a patch adding sys_*stat64 prototypes to
include/linux/syscalls.h, acked by Andrew Morton"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (47 commits)
arm64: compat: Remove incorrect comment in compat_siginfo
arm64: Fix section mismatch on alloc_init_p[mu]d()
arm64: Avoid breakage caused by .altmacro in fpsimd save/restore macros
arm64: mm: use *_sect to check for section maps
arm64: drop unnecessary cache+tlb maintenance
arm64:mm: free the useless initial page table
arm64: Enable CPU_IDLE in defconfig
arm64: kernel: remove ARM64_CPU_SUSPEND config option
arm64: make sys_call_table const
arm64: Remove asm/syscalls.h
arm64: Implement the compat_sys_call_table in C
syscalls: Declare sys_*stat64 prototypes if __ARCH_WANT_(COMPAT_)STAT64
compat: Declare compat_sys_sigpending and compat_sys_sigprocmask prototypes
arm64: uapi: expose our struct ucontext to the uapi headers
smp, ARM64: Kill SMP single function call interrupt
arm64: Emulate SETEND for AArch32 tasks
arm64: Consolidate hotplug notifier for instruction emulation
arm64: Track system support for mixed endian EL0
arm64: implement generic IOMMU configuration
arm64: Combine coherent and non-coherent swiotlb dma_ops
...
Diffstat (limited to 'arch')
62 files changed, 1334 insertions, 879 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index b1f9a20a3677..d3f7e4941231 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -540,6 +540,21 @@ config CP15_BARRIER_EMULATION If unsure, say Y +config SETEND_EMULATION + bool "Emulate SETEND instruction" + help + The SETEND instruction alters the data-endianness of the + AArch32 EL0, and is deprecated in ARMv8. + + Say Y here to enable software emulation of the instruction + for AArch32 userspace code. + + Note: All the cpus on the system must have mixed endian support at EL0 + for this feature to be enabled. If a new CPU - which doesn't support mixed + endian - is hotplugged in after this feature has been enabled, there could + be unexpected results in the applications. + + If unsure, say Y endif endmenu @@ -627,9 +642,6 @@ source "kernel/power/Kconfig" config ARCH_SUSPEND_POSSIBLE def_bool y -config ARM64_CPU_SUSPEND - def_bool PM_SLEEP - endmenu menu "CPU Power Management" diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug index 5fdd6dce8061..4a8741073c90 100644 --- a/arch/arm64/Kconfig.debug +++ b/arch/arm64/Kconfig.debug @@ -66,4 +66,27 @@ config DEBUG_SET_MODULE_RONX against certain classes of kernel exploits. If in doubt, say "N". +config DEBUG_RODATA + bool "Make kernel text and rodata read-only" + help + If this is set, kernel text and rodata will be made read-only. This + is to help catch accidental or malicious attempts to change the + kernel's executable code. Additionally splits rodata from kernel + text so it can be made explicitly non-executable. + + If in doubt, say Y + +config DEBUG_ALIGN_RODATA + depends on DEBUG_RODATA && !ARM64_64K_PAGES + bool "Align linker sections up to SECTION_SIZE" + help + If this option is enabled, sections that may potentially be marked as + read only or non-executable will be aligned up to the section size of + the kernel. This prevents sections from being split into pages and + avoids a potential TLB penalty. The downside is an increase in + alignment and potentially wasted space. Turn on this option if + performance is more important than memory pressure. + + If in doubt, say N + endmenu diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 066688863920..69ceedc982a5 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -15,8 +15,6 @@ CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET) OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S GZFLAGS :=-9 -LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name) - KBUILD_DEFCONFIG := defconfig KBUILD_CFLAGS += -mgeneral-regs-only @@ -50,7 +48,6 @@ core-$(CONFIG_KVM) += arch/arm64/kvm/ core-$(CONFIG_XEN) += arch/arm64/xen/ core-$(CONFIG_CRYPTO) += arch/arm64/crypto/ libs-y := arch/arm64/lib/ $(libs-y) -libs-y += $(LIBGCC) libs-$(CONFIG_EFI_STUB) += drivers/firmware/efi/libstub/ # Default target when executing plain make diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index 5376d908eabe..66b6cacc3251 100644 --- a/arch/arm64/configs/defconfig +++ b/arch/arm64/configs/defconfig @@ -45,6 +45,8 @@ CONFIG_CMA=y CONFIG_CMDLINE="console=ttyAMA0" # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set CONFIG_COMPAT=y +CONFIG_CPU_IDLE=y +CONFIG_ARM64_CPUIDLE=y CONFIG_NET=y CONFIG_PACKET=y CONFIG_UNIX=y diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index 7ae31a2cc6c0..67d309cc3b6b 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -152,4 +152,9 @@ int set_memory_ro(unsigned long addr, int numpages); int set_memory_rw(unsigned long addr, int numpages); int set_memory_x(unsigned long addr, int numpages); int set_memory_nx(unsigned long addr, int numpages); + +#ifdef CONFIG_DEBUG_RODATA +void mark_rodata_ro(void); +#endif + #endif diff --git a/arch/arm64/include/asm/cachetype.h b/arch/arm64/include/asm/cachetype.h index 4c631a0a3609..da2fc9e3cedd 100644 --- a/arch/arm64/include/asm/cachetype.h +++ b/arch/arm64/include/asm/cachetype.h @@ -39,24 +39,41 @@ extern unsigned long __icache_flags; +/* + * NumSets, bits[27:13] - (Number of sets in cache) - 1 + * Associativity, bits[12:3] - (Associativity of cache) - 1 + * LineSize, bits[2:0] - (Log2(Number of words in cache line)) - 2 + */ +#define CCSIDR_EL1_WRITE_THROUGH BIT(31) +#define CCSIDR_EL1_WRITE_BACK BIT(30) +#define CCSIDR_EL1_READ_ALLOCATE BIT(29) +#define CCSIDR_EL1_WRITE_ALLOCATE BIT(28) #define CCSIDR_EL1_LINESIZE_MASK 0x7 #define CCSIDR_EL1_LINESIZE(x) ((x) & CCSIDR_EL1_LINESIZE_MASK) - +#define CCSIDR_EL1_ASSOCIATIVITY_SHIFT 3 +#define CCSIDR_EL1_ASSOCIATIVITY_MASK 0x3ff +#define CCSIDR_EL1_ASSOCIATIVITY(x) \ + (((x) >> CCSIDR_EL1_ASSOCIATIVITY_SHIFT) & CCSIDR_EL1_ASSOCIATIVITY_MASK) #define CCSIDR_EL1_NUMSETS_SHIFT 13 -#define CCSIDR_EL1_NUMSETS_MASK (0x7fff << CCSIDR_EL1_NUMSETS_SHIFT) +#define CCSIDR_EL1_NUMSETS_MASK 0x7fff #define CCSIDR_EL1_NUMSETS(x) \ - (((x) & CCSIDR_EL1_NUMSETS_MASK) >> CCSIDR_EL1_NUMSETS_SHIFT) + (((x) >> CCSIDR_EL1_NUMSETS_SHIFT) & CCSIDR_EL1_NUMSETS_MASK) + +#define CACHE_LINESIZE(x) (16 << CCSIDR_EL1_LINESIZE(x)) +#define CACHE_NUMSETS(x) (CCSIDR_EL1_NUMSETS(x) + 1) +#define CACHE_ASSOCIATIVITY(x) (CCSIDR_EL1_ASSOCIATIVITY(x) + 1) -extern u64 __attribute_const__ icache_get_ccsidr(void); +extern u64 __attribute_const__ cache_get_ccsidr(u64 csselr); +/* Helpers for Level 1 Instruction cache csselr = 1L */ static inline int icache_get_linesize(void) { - return 16 << CCSIDR_EL1_LINESIZE(icache_get_ccsidr()); + return CACHE_LINESIZE(cache_get_ccsidr(1L)); } static inline int icache_get_numsets(void) { - return 1 + CCSIDR_EL1_NUMSETS(icache_get_ccsidr()); + return CACHE_NUMSETS(cache_get_ccsidr(1L)); } /* diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h index 3fb053fa6e98..7fbed6919b54 100644 --- a/arch/arm64/include/asm/compat.h +++ b/arch/arm64/include/asm/compat.h @@ -161,7 +161,6 @@ typedef struct compat_siginfo { int si_code; union { - /* The padding is the same size as AArch64. */ int _pad[128/sizeof(int) - 3]; /* kill() */ diff --git a/arch/arm64/include/asm/cpu_ops.h b/arch/arm64/include/asm/cpu_ops.h index 6f8e2ef9094a..da301ee7395c 100644 --- a/arch/arm64/include/asm/cpu_ops.h +++ b/arch/arm64/include/asm/cpu_ops.h @@ -28,8 +28,6 @@ struct device_node; * enable-method property. * @cpu_init: Reads any data necessary for a specific enable-method from the * devicetree, for a given cpu node and proposed logical id. - * @cpu_init_idle: Reads any data necessary to initialize CPU idle states from - * devicetree, for a given cpu node and proposed logical id. * @cpu_prepare: Early one-time preparation step for a cpu. If there is a * mechanism for doing so, tests whether it is possible to boot * the given CPU. @@ -42,6 +40,8 @@ struct device_node; * @cpu_die: Makes a cpu leave the kernel. Must not fail. Called from the * cpu being killed. * @cpu_kill: Ensures a cpu has left the kernel. Called from another cpu. + * @cpu_init_idle: Reads any data necessary to initialize CPU idle states from + * devicetree, for a given cpu node and proposed logical id. * @cpu_suspend: Suspends a cpu and saves the required context. May fail owing * to wrong parameters or error conditions. Called from the * CPU being suspended. Must be called with IRQs disabled. @@ -49,7 +49,6 @@ struct device_node; struct cpu_operations { const char *name; int (*cpu_init)(struct device_node *, unsigned int); - int (*cpu_init_idle)(struct device_node *, unsigned int); int (*cpu_prepare)(unsigned int); int (*cpu_boot)(unsigned int); void (*cpu_postboot)(void); @@ -58,7 +57,8 @@ struct cpu_operations { void (*cpu_die)(unsigned int cpu); int (*cpu_kill)(unsigned int cpu); #endif -#ifdef CONFIG_ARM64_CPU_SUSPEND +#ifdef CONFIG_CPU_IDLE + int (*cpu_init_idle)(struct device_node *, unsigned int); int (*cpu_suspend)(unsigned long); #endif }; diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index 07547ccc1f2b..b6c16d5f622f 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -52,6 +52,8 @@ static inline void cpus_set_cap(unsigned int num) } void check_local_cpu_errata(void); +bool cpu_supports_mixed_endian_el0(void); +bool system_supports_mixed_endian_el0(void); #endif /* __ASSEMBLY__ */ diff --git a/arch/arm64/include/asm/cpuidle.h b/arch/arm64/include/asm/cpuidle.h index b52a9932e2b1..0710654631e7 100644 --- a/arch/arm64/include/asm/cpuidle.h +++ b/arch/arm64/include/asm/cpuidle.h @@ -3,11 +3,17 @@ #ifdef CONFIG_CPU_IDLE extern int cpu_init_idle(unsigned int cpu); +extern int cpu_suspend(unsigned long arg); #else static inline int cpu_init_idle(unsigned int cpu) { return -EOPNOTSUPP; } + +static inline int cpu_suspend(unsigned long arg) +{ + return -EOPNOTSUPP; +} #endif #endif diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index 8adb986a3086..a84ec605bed8 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -72,6 +72,18 @@ #define APM_CPU_PART_POTENZA 0x000 +#define ID_AA64MMFR0_BIGENDEL0_SHIFT 16 +#define ID_AA64MMFR0_BIGENDEL0_MASK (0xf << ID_AA64MMFR0_BIGENDEL0_SHIFT) +#define ID_AA64MMFR0_BIGENDEL0(mmfr0) \ + (((mmfr0) & ID_AA64MMFR0_BIGENDEL0_MASK) >> ID_AA64MMFR0_BIGENDEL0_SHIFT) +#define ID_AA64MMFR0_BIGEND_SHIFT 8 +#define ID_AA64MMFR0_BIGEND_MASK (0xf << ID_AA64MMFR0_BIGEND_SHIFT) +#define ID_AA64MMFR0_BIGEND(mmfr0) \ + (((mmfr0) & ID_AA64MMFR0_BIGEND_MASK) >> ID_AA64MMFR0_BIGEND_SHIFT) + +#define SCTLR_EL1_CP15BEN (0x1 << 5) +#define SCTLR_EL1_SED (0x1 << 8) + #ifndef __ASSEMBLY__ /* @@ -104,6 +116,11 @@ static inline u32 __attribute_const__ read_cpuid_cachetype(void) return read_cpuid(CTR_EL0); } +static inline bool id_aa64mmfr0_mixed_endian_el0(u64 mmfr0) +{ + return (ID_AA64MMFR0_BIGEND(mmfr0) == 0x1) || + (ID_AA64MMFR0_BIGENDEL0(mmfr0) == 0x1); +} #endif /* __ASSEMBLY__ */ #endif diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index 9ce3e680ae1c..6932bb57dba0 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -28,8 +28,6 @@ #define DMA_ERROR_CODE (~(dma_addr_t)0) extern struct dma_map_ops *dma_ops; -extern struct dma_map_ops coherent_swiotlb_dma_ops; -extern struct dma_map_ops noncoherent_swiotlb_dma_ops; static inline struct dma_map_ops *__generic_dma_ops(struct device *dev) { @@ -47,23 +45,18 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev) return __generic_dma_ops(dev); } -static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops) -{ - dev->archdata.dma_ops = ops; -} - static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, struct iommu_ops *iommu, bool coherent) { dev->archdata.dma_coherent = coherent; - if (coherent) - set_dma_ops(dev, &coherent_swiotlb_dma_ops); } #define arch_setup_dma_ops arch_setup_dma_ops /* do not use this function in a driver */ static inline bool is_device_dma_coherent(struct device *dev) { + if (!dev) + return false; return dev->archdata.dma_coherent; } diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h index a34fd3b12e2b..ef572206f1c3 100644 --- a/arch/arm64/include/asm/efi.h +++ b/arch/arm64/include/asm/efi.h @@ -6,29 +6,33 @@ #ifdef CONFIG_EFI extern void efi_init(void); -extern void efi_idmap_init(void); #else #define efi_init() -#define efi_idmap_init() #endif #define efi_call_virt(f, ...) \ ({ \ - efi_##f##_t *__f = efi.systab->runtime->f; \ + efi_##f##_t *__f; \ efi_status_t __s; \ \ kernel_neon_begin(); \ + efi_virtmap_load(); \ + __f = efi.systab->runtime->f; \ __s = __f(__VA_ARGS__); \ + efi_virtmap_unload(); \ kernel_neon_end(); \ __s; \ }) #define __efi_call_virt(f, ...) \ ({ \ - efi_##f##_t *__f = efi.systab->runtime->f; \ + efi_##f##_t *__f; \ \ kernel_neon_begin(); \ + efi_virtmap_load(); \ + __f = efi.systab->runtime->f; \ __f(__VA_ARGS__); \ + efi_virtmap_unload(); \ kernel_neon_end(); \ }) @@ -44,4 +48,22 @@ extern void efi_idmap_init(void); #define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__) +#define EFI_ALLOC_ALIGN SZ_64K + +/* + * On ARM systems, virtually remapped UEFI runtime services are set up in two + * distinct stages: + * - The stub retrieves the final version of the memory map from UEFI, populates + * the virt_addr fields and calls the SetVirtualAddressMap() [SVAM] runtime + * service to communicate the new mapping to the firmware (Note that the new + * mapping is not live at this time) + * - During an early initcall(), the EFI system table is permanently remapped + * and the virtual remapping of the UEFI Runtime Services regions is loaded + * into a private set of page tables. If this all succeeds, the Runtime + * Services are enabled and the EFI_RUNTIME_SERVICES bit set. + */ + +void efi_virtmap_load(void); +void efi_virtmap_unload(void); + #endif /* _ASM_EFI_H */ diff --git a/arch/arm64/include/asm/esr.h b/arch/arm64/include/asm/esr.h index 72674f4c3871..62167090937d 100644 --- a/arch/arm64/include/asm/esr.h +++ b/arch/arm64/include/asm/esr.h @@ -18,40 +18,89 @@ #ifndef __ASM_ESR_H #define __ASM_ESR_H -#define ESR_EL1_WRITE (1 << 6) -#define ESR_EL1_CM (1 << 8) -#define ESR_EL1_IL (1 << 25) +#define ESR_ELx_EC_UNKNOWN (0x00) +#define ESR_ELx_EC_WFx (0x01) +/* Unallocated EC: 0x02 */ +#define ESR_ELx_EC_CP15_32 (0x03) +#define ESR_ELx_EC_CP15_64 (0x04) +#define ESR_ELx_EC_CP14_MR (0x05) +#define ESR_ELx_EC_CP14_LS (0x06) +#define ESR_ELx_EC_FP_ASIMD (0x07) +#define ESR_ELx_EC_CP10_ID (0x08) +/* Unallocated EC: 0x09 - 0x0B */ +#define ESR_ELx_EC_CP14_64 (0x0C) +/* Unallocated EC: 0x0d */ +#define ESR_ELx_EC_ILL (0x0E) +/* Unallocated EC: 0x0F - 0x10 */ +#define ESR_ELx_EC_SVC32 (0x11) +#define ESR_ELx_EC_HVC32 (0x12) +#define ESR_ELx_EC_SMC32 (0x13) +/* Unallocated EC: 0x14 */ +#define ESR_ELx_EC_SVC64 (0x15) +#define ESR_ELx_EC_HVC64 (0x16) +#define ESR_ELx_EC_SMC64 (0x17) +#define ESR_ELx_EC_SYS64 (0x18) +/* Unallocated EC: 0x19 - 0x1E */ +#define ESR_ELx_EC_IMP_DEF (0x1f) +#define ESR_ELx_EC_IABT_LOW (0x20) +#define ESR_ELx_EC_IABT_CUR (0x21) +#define ESR_ELx_EC_PC_ALIGN (0x22) +/* Unallocated EC: 0x23 */ +#define ESR_ELx_EC_DABT_LOW (0x24) +#define ESR_ELx_EC_DABT_CUR (0x25) +#define ESR_ELx_EC_SP_ALIGN (0x26) +/* Unallocated EC: 0x27 */ +#define ESR_ELx_EC_FP_EXC32 (0x28) +/* Unallocated EC: 0x29 - 0x2B */ +#define ESR_ELx_EC_FP_EXC64 (0x2C) +/* Unallocated EC: 0x2D - 0x2E */ +#define ESR_ELx_EC_SERROR (0x2F) +#define ESR_ELx_EC_BREAKPT_LOW (0x30) +#define ESR_ELx_EC_BREAKPT_CUR (0x31) +#define ESR_ELx_EC_SOFTSTP_LOW (0x32) +#define ESR_ELx_EC_SOFTSTP_CUR (0x33) +#define ESR_ELx_EC_WATCHPT_LOW (0x34) +#define ESR_ELx_EC_WATCHPT_CUR (0x35) +/* Unallocated EC: 0x36 - 0x37 */ +#define ESR_ELx_EC_BKPT32 (0x38) +/* Unallocated EC: 0x39 */ +#define ESR_ELx_EC_VECTOR32 (0x3A) +/* Unallocted EC: 0x3B */ +#define ESR_ELx_EC_BRK64 (0x3C) +/* Unallocated EC: 0x3D - 0x3F */ +#define ESR_ELx_EC_MAX (0x3F) -#define ESR_EL1_EC_SHIFT (26) -#define ESR_EL1_EC_UNKNOWN (0x00) -#define ESR_EL1_EC_WFI (0x01) -#define ESR_EL1_EC_CP15_32 (0x03) -#define ESR_EL1_EC_CP15_64 (0x04) -#define ESR_EL1_EC_CP14_MR (0x05) -#define ESR_EL1_EC_CP14_LS (0x06) -#define ESR_EL1_EC_FP_ASIMD (0x07) -#define ESR_EL1_EC_CP10_ID (0x08) -#define ESR_EL1_EC_CP14_64 (0x0C) -#define ESR_EL1_EC_ILL_ISS (0x0E) -#define ESR_EL1_EC_SVC32 (0x11) -#define ESR_EL1_EC_SVC64 (0x15) -#define ESR_EL1_EC_SYS64 (0x18) -#define ESR_EL1_EC_IABT_EL0 (0x20) -#define ESR_EL1_EC_IABT_EL1 (0x21) -#define ESR_EL1_EC_PC_ALIGN (0x22) -#define ESR_EL1_EC_DABT_EL0 (0x24) -#define ESR_EL1_EC_DABT_EL1 (0x25) -#define ESR_EL1_EC_SP_ALIGN (0x26) -#define ESR_EL1_EC_FP_EXC32 (0x28) -#define ESR_EL1_EC_FP_EXC64 (0x2C) -#define ESR_EL1_EC_SERROR (0x2F) -#define ESR_EL1_EC_BREAKPT_EL0 (0x30) -#define ESR_EL1_EC_BREAKPT_EL1 (0x31) -#define ESR_EL1_EC_SOFTSTP_EL0 (0x32) -#define ESR_EL1_EC_SOFTSTP_EL1 (0x33) -#define ESR_EL1_EC_WATCHPT_EL0 (0x34) -#define ESR_EL1_EC_WATCHPT_EL1 (0x35) -#define ESR_EL1_EC_BKPT32 (0x38) -#define ESR_EL1_EC_BRK64 (0x3C) +#define ESR_ELx_EC_SHIFT (26) +#define ESR_ELx_EC_MASK (UL(0x3F) << ESR_ELx_EC_SHIFT) + +#define ESR_ELx_IL (UL(1) << 25) +#define ESR_ELx_ISS_MASK (ESR_ELx_IL - 1) +#define ESR_ELx_ISV (UL(1) << 24) +#define ESR_ELx_SAS_SHIFT (22) +#define ESR_ELx_SAS (UL(3) << ESR_ELx_SAS_SHIFT) +#define ESR_ELx_SSE (UL(1) << 21) +#define ESR_ELx_SRT_SHIFT (16) +#define ESR_ELx_SRT_MASK (UL(0x1F) << ESR_ELx_SRT_SHIFT) +#define ESR_ELx_SF (UL(1) << 15) +#define ESR_ELx_AR (UL(1) << 14) +#define ESR_ELx_EA (UL(1) << 9) +#define ESR_ELx_CM (UL(1) << 8) +#define ESR_ELx_S1PTW (UL(1) << 7) +#define ESR_ELx_WNR (UL(1) << 6) +#define ESR_ELx_FSC (0x3F) +#define ESR_ELx_FSC_TYPE (0x3C) +#define ESR_ELx_FSC_EXTABT (0x10) +#define ESR_ELx_FSC_FAULT (0x04) +#define ESR_ELx_FSC_PERM (0x0C) +#define ESR_ELx_CV (UL(1) << 24) +#define ESR_ELx_COND_SHIFT (20) +#define ESR_ELx_COND_MASK (UL(0xF) << ESR_ELx_COND_SHIFT) +#define ESR_ELx_WFx_ISS_WFE (UL(1) << 0) + +#ifndef __ASSEMBLY__ +#include <asm/types.h> + +const char *esr_get_class_string(u32 esr); +#endif /* __ASSEMBLY */ #endif /* __ASM_ESR_H */ diff --git a/arch/arm64/include/asm/fixmap.h b/arch/arm64/include/asm/fixmap.h index 9ef6eca905ca..defa0ff98250 100644 --- a/arch/arm64/include/asm/fixmap.h +++ b/arch/arm64/include/asm/fixmap.h @@ -49,6 +49,7 @@ enum fixed_addresses { FIX_BTMAP_END = __end_of_permanent_fixed_addresses, FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1, + FIX_TEXT_POKE0, __end_of_fixed_addresses }; diff --git a/arch/arm64/include/asm/fpsimdmacros.h b/arch/arm64/include/asm/fpsimdmacros.h index 007618b8188c..a2daf1293028 100644 --- a/arch/arm64/include/asm/fpsimdmacros.h +++ b/arch/arm64/include/asm/fpsimdmacros.h @@ -76,7 +76,6 @@ fpsimd_restore_fpcr x\tmpnr, \state .endm -.altmacro .macro fpsimd_save_partial state, numnr, tmpnr1, tmpnr2 mrs x\tmpnr1, fpsr str w\numnr, [\state, #8] @@ -86,11 +85,22 @@ add \state, \state, x\numnr, lsl #4 sub x\tmpnr1, x\tmpnr1, x\numnr, lsl #1 br x\tmpnr1 - .irp qa, 30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 0 - .irp qb, %(qa + 1) - stp q\qa, q\qb, [\state, # -16 * \qa - 16] - .endr - .endr + stp q30, q31, [\state, #-16 * 30 - 16] + stp q28, q29, [\state, #-16 * 28 - 16] + stp q26, q27, [\state, #-16 * 26 - 16] + stp q24, q25, [\state, #-16 * 24 - 16] + stp q22, q23, [\state, #-16 * 22 - 16] + stp q20, q21, [\state, #-16 * 20 - 16] + stp q18, q19, [\state, #-16 * 18 - 16] + stp q16, q17, [\state, #-16 * 16 - 16] + stp q14, q15, [\state, #-16 * 14 - 16] + stp q12, q13, [\state, #-16 * 12 - 16] + stp q10, q11, [\state, #-16 * 10 - 16] + stp q8, q9, [\state, #-16 * 8 - 16] + stp q6, q7, [\state, #-16 * 6 - 16] + stp q4, q5, [\state, #-16 * 4 - 16] + stp q2, q3, [\state, #-16 * 2 - 16] + stp q0, q1, [\state, #-16 * 0 - 16] 0: .endm @@ -103,10 +113,21 @@ add \state, \state, x\tmpnr2, lsl #4 sub x\tmpnr1, x\tmpnr1, x\tmpnr2, lsl #1 br x\tmpnr1 - .irp qa, 30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 0 - .irp qb, %(qa + 1) - ldp q\qa, q\qb, [\state, # -16 * \qa - 16] - .endr - .endr + ldp q30, q31, [\state, #-16 * 30 - 16] + ldp q28, q29, [\state, #-16 * 28 - 16] + ldp q26, q27, [\state, #-16 * 26 - 16] + ldp q24, q25, [\state, #-16 * 24 - 16] + ldp q22, q23, [\state, #-16 * 22 - 16] + ldp q20, q21, [\state, #-16 * 20 - 16] + ldp q18, q19, [\state, #-16 * 18 - 16] + ldp q16, q17, [\state, #-16 * 16 - 16] + ldp q14, q15, [\state, #-16 * 14 - 16] + ldp q12, q13, [\state, #-16 * 12 - 16] + ldp q10, q11, [\state, #-16 * 10 - 16] + ldp q8, q9, [\state, #-16 * 8 - 16] + ldp q6, q7, [\state, #-16 * 6 - 16] + ldp q4, q5, [\state, #-16 * 4 - 16] + ldp q2, q3, [\state, #-16 * 2 - 16] + ldp q0, q1, [\state, #-16 * 0 - 16] 0: .endm diff --git a/arch/arm64/include/asm/hardirq.h b/arch/arm64/include/asm/hardirq.h index e8a3268a891c..6aae421f4d73 100644 --- a/arch/arm64/include/asm/hardirq.h +++ b/arch/arm64/include/asm/hardirq.h @@ -20,7 +20,7 @@ #include <linux/threads.h> #include <asm/irq.h> -#define NR_IPI 6 +#define NR_IPI 5 typedef struct { unsigned int __softirq_pending; diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h index 949c406d4df4..540f7c0aea82 100644 --- a/arch/arm64/include/asm/io.h +++ b/arch/arm64/include/asm/io.h @@ -26,6 +26,7 @@ #include <asm/byteorder.h> #include <asm/barrier.h> +#include <asm/memory.h> #include <asm/pgtable.h> #include <asm/early_ioremap.h> #include <asm/alternative.h> @@ -145,8 +146,8 @@ static inline u64 __raw_readq(const volatile void __iomem *addr) * I/O port access primitives. */ #define arch_has_dev_port() (1) -#define IO_SPACE_LIMIT (SZ_32M - 1) -#define PCI_IOBASE ((void __iomem *)(MODULES_VADDR - SZ_32M)) +#define IO_SPACE_LIMIT (PCI_IO_SIZE - 1) +#define PCI_IOBASE ((void __iomem *)PCI_IO_START) /* * String version of I/O memory access operations. diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 8afb863f5a9e..94674eb7e7bb 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -18,6 +18,7 @@ #ifndef __ARM64_KVM_ARM_H__ #define __ARM64_KVM_ARM_H__ +#include <asm/esr.h> #include <asm/memory.h> #include <asm/types.h> @@ -184,77 +185,11 @@ #define MDCR_EL2_TPMCR (1 << 5) #define MDCR_EL2_HPMN_MASK (0x1F) -/* Exception Syndrome Register (ESR) bits */ -#define ESR_EL2_EC_SHIFT (26) -#define ESR_EL2_EC (UL(0x3f) << ESR_EL2_EC_SHIFT) -#define ESR_EL2_IL (UL(1) << 25) -#define ESR_EL2_ISS (ESR_EL2_IL - 1) -#define ESR_EL2_ISV_SHIFT (24) -#define ESR_EL2_ISV (UL(1) << ESR_EL2_ISV_SHIFT) -#define ESR_EL2_SAS_SHIFT (22) -#define ESR_EL2_SAS (UL(3) << ESR_EL2_SAS_SHIFT) -#define ESR_EL2_SSE (1 << 21) -#define ESR_EL2_SRT_SHIFT (16) -#define ESR_EL2_SRT_MASK (0x1f << ESR_EL2_SRT_SHIFT) -#define ESR_EL2_SF (1 << 15) -#define ESR_EL2_AR (1 << 14) -#define ESR_EL2_EA (1 << 9) -#define ESR_EL2_CM (1 << 8) -#define ESR_EL2_S1PTW (1 << 7) -#define ESR_EL2_WNR (1 << 6) -#define ESR_EL2_FSC (0x3f) -#define ESR_EL2_FSC_TYPE (0x3c) - -#define ESR_EL2_CV_SHIFT (24) -#define ESR_EL2_CV (UL(1) << ESR_EL2_CV_SHIFT) -#define ESR_EL2_COND_SHIFT (20) -#define ESR_EL2_COND (UL(0xf) << ESR_EL2_COND_SHIFT) - - -#define FSC_FAULT (0x04) -#define FSC_PERM (0x0c) +/* For compatibility with fault code shared with 32-bit */ +#define FSC_FAULT ESR_ELx_FSC_FAULT +#define FSC_PERM ESR_ELx_FSC_PERM /* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */ #define HPFAR_MASK (~UL(0xf)) -#define ESR_EL2_EC_UNKNOWN (0x00) -#define ESR_EL2_EC_WFI (0x01) -#define ESR_EL2_EC_CP15_32 (0x03) -#define ESR_EL2_EC_CP15_64 (0x04) -#define ESR_EL2_EC_CP14_MR (0x05) -#define ESR_EL2_EC_CP14_LS (0x06) -#define ESR_EL2_EC_FP_ASIMD (0x07) -#define ESR_EL2_EC_CP10_ID (0x08) -#define ESR_EL2_EC_CP14_64 (0x0C) -#define ESR_EL2_EC_ILL_ISS (0x0E) -#define ESR_EL2_EC_SVC32 (0x11) -#define ESR_EL2_EC_HVC32 (0x12) -#define ESR_EL2_EC_SMC32 (0x13) -#define ESR_EL2_EC_SVC64 (0x15) -#define ESR_EL2_EC_HVC64 (0x16) -#define ESR_EL2_EC_SMC64 (0x17) -#define ESR_EL2_EC_SYS64 (0x18) -#define ESR_EL2_EC_IABT (0x20) -#define ESR_EL2_EC_IABT_HYP (0x21) -#define ESR_EL2_EC_PC_ALIGN (0x22) -#define ESR_EL2_EC_DABT (0x24) -#define ESR_EL2_EC_DABT_HYP (0x25) -#define ESR_EL2_EC_SP_ALIGN (0x26) -#define ESR_EL2_EC_FP_EXC32 (0x28) -#define ESR_EL2_EC_FP_EXC64 (0x2C) -#define ESR_EL2_EC_SERROR (0x2F) -#define ESR_EL2_EC_BREAKPT (0x30) -#define ESR_EL2_EC_BREAKPT_HYP (0x31) -#define ESR_EL2_EC_SOFTSTP (0x32) -#define ESR_EL2_EC_SOFTSTP_HYP (0x33) -#define ESR_EL2_EC_WATCHPT (0x34) -#define ESR_EL2_EC_WATCHPT_HYP (0x35) -#define ESR_EL2_EC_BKPT32 (0x38) -#define ESR_EL2_EC_VECTOR32 (0x3A) -#define ESR_EL2_EC_BRK64 (0x3C) - -#define ESR_EL2_EC_xABT_xFSR_EXTABT 0x10 - -#define ESR_EL2_EC_WFI_ISS_WFE (1 << 0) - #endif /* __ARM64_KVM_ARM_H__ */ diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index 3cb4c856b10d..0163b5775ca5 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -23,8 +23,10 @@ #define __ARM64_KVM_EMULATE_H__ #include <linux/kvm_host.h> -#include <asm/kvm_asm.h> + +#include <asm/esr.h> #include <asm/kvm_arm.h> +#include <asm/kvm_asm.h> #include <asm/kvm_mmio.h> #include <asm/ptrace.h> @@ -140,63 +142,63 @@ static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu) static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu) { - return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_ISV); + return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV); } static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu) { - return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_WNR); + return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR); } static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu) { - return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SSE); + return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE); } static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu) { - return (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SRT_MASK) >> ESR_EL2_SRT_SHIFT; + return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT; } static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu) { - return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EA); + return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_EA); } static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu) { - return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_S1PTW); + return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW); } static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu) { - return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SAS) >> ESR_EL2_SAS_SHIFT); + return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT); } /* This one is not specific to Data Abort */ static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu) { - return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_IL); + return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL); } static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu) { - return kvm_vcpu_get_hsr(vcpu) >> ESR_EL2_EC_SHIFT; + return kvm_vcpu_get_hsr(vcpu) >> ESR_ELx_EC_SHIFT; } static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu) { - return kvm_vcpu_trap_get_class(vcpu) == ESR_EL2_EC_IABT; + return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW; } static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu) { - return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC; + return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC; } static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu) { - return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC_TYPE; + return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE; } static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu *vcpu) diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index 6486b2bfd562..f800d45ea226 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -33,6 +33,12 @@ #define UL(x) _AC(x, UL) /* + * Size of the PCI I/O space. This must remain a power of two so that + * IO_SPACE_LIMIT acts as a mask for the low bits of I/O addresses. + */ +#define PCI_IO_SIZE SZ_16M + +/* * PAGE_OFFSET - the virtual address of the start of the kernel image (top * (VA_BITS - 1)) * VA_BITS - the maximum number of bits for virtual addresses. @@ -45,7 +51,9 @@ #define PAGE_OFFSET (UL(0xffffffffffffffff) << (VA_BITS - 1)) #define MODULES_END (PAGE_OFFSET) #define MODULES_VADDR (MODULES_END - SZ_64M) -#define FIXADDR_TOP (MODULES_VADDR - SZ_2M - PAGE_SIZE) +#define PCI_IO_END (MODULES_VADDR - SZ_2M) +#define PCI_IO_START (PCI_IO_END - PCI_IO_SIZE) +#define FIXADDR_TOP (PCI_IO_START - SZ_2M) #define TASK_SIZE_64 (UL(1) << VA_BITS) #ifdef CONFIG_COMPAT diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h index c2f006c48bdb..3d311761e3c2 100644 --- a/arch/arm64/include/asm/mmu.h +++ b/arch/arm64/include/asm/mmu.h @@ -31,7 +31,8 @@ extern void paging_init(void); extern void setup_mm_for_reboot(void); extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt); extern void init_mem_pgprot(void); -/* create an identity mapping for memory (or io if map_io is true) */ -extern void create_id_mapping(phys_addr_t addr, phys_addr_t size, int map_io); +extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys, + unsigned long virt, phys_addr_t size, + pgprot_t prot); #endif diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 4c445057169d..cf1d9c86f20a 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -263,6 +263,11 @@ static inline pmd_t pte_pmd(pte_t pte) return __pmd(pte_val(pte)); } +static inline pgprot_t mk_sect_prot(pgprot_t prot) +{ + return __pgprot(pgprot_val(prot) & ~PTE_TABLE_BIT); +} + /* * THP definitions. */ @@ -336,9 +341,12 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, #ifdef CONFIG_ARM64_64K_PAGES #define pud_sect(pud) (0) +#define pud_table(pud) (1) #else #define pud_sect(pud) ((pud_val(pud) & PUD_TYPE_MASK) == \ PUD_TYPE_SECT) +#define pud_table(pud) ((pud_val(pud) & PUD_TYPE_MASK) == \ + PUD_TYPE_TABLE) #endif static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h index 41ed9e13795e..d6dd9fdbc3be 100644 --- a/arch/arm64/include/asm/ptrace.h +++ b/arch/arm64/include/asm/ptrace.h @@ -58,6 +58,13 @@ #define COMPAT_PSR_Z_BIT 0x40000000 #define COMPAT_PSR_N_BIT 0x80000000 #define COMPAT_PSR_IT_MASK 0x0600fc00 /* If-Then execution state mask */ + +#ifdef CONFIG_CPU_BIG_ENDIAN +#define COMPAT_PSR_ENDSTATE COMPAT_PSR_E_BIT +#else +#define COMPAT_PSR_ENDSTATE 0 +#endif + /* * These are 'magic' values for PTRACE_PEEKUSR that return info about where a * process is located in memory. diff --git a/arch/arm64/include/asm/suspend.h b/arch/arm64/include/asm/suspend.h index 456d67c1f0fa..003802f58963 100644 --- a/arch/arm64/include/asm/suspend.h +++ b/arch/arm64/include/asm/suspend.h @@ -23,6 +23,4 @@ struct sleep_save_sp { extern int __cpu_suspend(unsigned long arg, int (*fn)(unsigned long)); extern void cpu_resume(void); -extern int cpu_suspend(unsigned long); - #endif diff --git a/arch/arm64/include/asm/syscalls.h b/arch/arm64/include/asm/syscalls.h deleted file mode 100644 index 48fe7c600e98..000000000000 --- a/arch/arm64/include/asm/syscalls.h +++ /dev/null @@ -1,30 +0,0 @@ -/* - * Copyright (C) 2012 ARM Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ -#ifndef __ASM_SYSCALLS_H -#define __ASM_SYSCALLS_H - -#include <linux/linkage.h> -#include <linux/compiler.h> -#include <linux/signal.h> - -/* - * System call wrappers implemented in kernel/entry.S. - */ -asmlinkage long sys_rt_sigreturn_wrapper(void); - -#include <asm-generic/syscalls.h> - -#endif /* __ASM_SYSCALLS_H */ diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h index 23e9432ac112..3bc498c250dc 100644 --- a/arch/arm64/include/asm/unistd.h +++ b/arch/arm64/include/asm/unistd.h @@ -48,6 +48,9 @@ #endif #define __ARCH_WANT_SYS_CLONE + +#ifndef __COMPAT_SYSCALL_NR #include <uapi/asm/unistd.h> +#endif #define NR_syscalls (__NR_syscalls) diff --git a/arch/arm64/include/uapi/asm/Kbuild b/arch/arm64/include/uapi/asm/Kbuild index 942376d37d22..825b0fe51c2b 100644 --- a/arch/arm64/include/uapi/asm/Kbuild +++ b/arch/arm64/include/uapi/asm/Kbuild @@ -18,4 +18,5 @@ header-y += siginfo.h header-y += signal.h header-y += stat.h header-y += statfs.h +header-y += ucontext.h header-y += unistd.h diff --git a/arch/arm64/include/asm/ucontext.h b/arch/arm64/include/uapi/asm/ucontext.h index 42e04c877428..791de8e89e35 100644 --- a/arch/arm64/include/asm/ucontext.h +++ b/arch/arm64/include/uapi/asm/ucontext.h @@ -13,8 +13,10 @@ * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ -#ifndef __ASM_UCONTEXT_H -#define __ASM_UCONTEXT_H +#ifndef _UAPI__ASM_UCONTEXT_H +#define _UAPI__ASM_UCONTEXT_H + +#include <linux/types.h> struct ucontext { unsigned long uc_flags; @@ -27,4 +29,4 @@ struct ucontext { struct sigcontext uc_mcontext; }; -#endif /* __ASM_UCONTEXT_H */ +#endif /* _UAPI__ASM_UCONTEXT_H */ diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index eaa77ed7766a..bef04afd6031 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -16,10 +16,10 @@ arm64-obj-y := cputable.o debug-monitors.o entry.o irq.o fpsimd.o \ entry-fpsimd.o process.o ptrace.o setup.o signal.o \ sys.o stacktrace.o time.o traps.o io.o vdso.o \ hyp-stub.o psci.o cpu_ops.o insn.o return_address.o \ - cpuinfo.o cpu_errata.o alternative.o + cpuinfo.o cpu_errata.o alternative.o cacheinfo.o arm64-obj-$(CONFIG_COMPAT) += sys32.o kuser32.o signal32.o \ - sys_compat.o \ + sys_compat.o entry32.o \ ../../arm/kernel/opcodes.o arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o @@ -27,7 +27,7 @@ arm64-obj-$(CONFIG_SMP) += smp.o smp_spin_table.o topology.o arm64-obj-$(CONFIG_PERF_EVENTS) += perf_regs.o arm64-obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o arm64-obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o -arm64-obj-$(CONFIG_ARM64_CPU_SUSPEND) += sleep.o suspend.o +arm64-obj-$(CONFIG_CPU_PM) += sleep.o suspend.o arm64-obj-$(CONFIG_CPU_IDLE) += cpuidle.o arm64-obj-$(CONFIG_JUMP_LABEL) += jump_label.o arm64-obj-$(CONFIG_KGDB) += kgdb.o diff --git a/arch/arm64/kernel/armv8_deprecated.c b/arch/arm64/kernel/armv8_deprecated.c index c363671d7509..7922c2e710ca 100644 --- a/arch/arm64/kernel/armv8_deprecated.c +++ b/arch/arm64/kernel/armv8_deprecated.c @@ -19,6 +19,7 @@ #include <asm/system_misc.h> #include <asm/traps.h> #include <asm/uaccess.h> +#include <asm/cpufeature.h> #define CREATE_TRACE_POINTS #include "trace-events-emulation.h" @@ -85,6 +86,57 @@ static void remove_emulation_hooks(struct insn_emulation_ops *ops) pr_notice("Removed %s emulation handler\n", ops->name); } +static void enable_insn_hw_mode(void *data) +{ + struct insn_emulation *insn = (struct insn_emulation *)data; + if (insn->ops->set_hw_mode) + insn->ops->set_hw_mode(true); +} + +static void disable_insn_hw_mode(void *data) +{ + struct insn_emulation *insn = (struct insn_emulation *)data; + if (insn->ops->set_hw_mode) + insn->ops->set_hw_mode(false); +} + +/* Run set_hw_mode(mode) on all active CPUs */ +static int run_all_cpu_set_hw_mode(struct insn_emulation *insn, bool enable) +{ + if (!insn->ops->set_hw_mode) + return -EINVAL; + if (enable) + on_each_cpu(enable_insn_hw_mode, (void *)insn, true); + else + on_each_cpu(disable_insn_hw_mode, (void *)insn, true); + return 0; +} + +/* + * Run set_hw_mode for all insns on a starting CPU. + * Returns: + * 0 - If all the hooks ran successfully. + * -EINVAL - At least one hook is not supported by the CPU. + */ +static int run_all_insn_set_hw_mode(unsigned long cpu) +{ + int rc = 0; + unsigned long flags; + struct insn_emulation *insn; + + raw_spin_lock_irqsave(&insn_emulation_lock, flags); + list_for_each_entry(insn, &insn_emulation, node) { + bool enable = (insn->current_mode == INSN_HW); + if (insn->ops->set_hw_mode && insn->ops->set_hw_mode(enable)) { + pr_warn("CPU[%ld] cannot support the emulation of %s", + cpu, insn->ops->name); + rc = -EINVAL; + } + } + raw_spin_unlock_irqrestore(&insn_emulation_lock, flags); + return rc; +} + static int update_insn_emulation_mode(struct insn_emulation *insn, enum insn_emulation_mode prev) { @@ -97,10 +149,8 @@ static int update_insn_emulation_mode(struct insn_emulation *insn, remove_emulation_hooks(insn->ops); break; case INSN_HW: - if (insn->ops->set_hw_mode) { - insn->ops->set_hw_mode(false); + if (!run_all_cpu_set_hw_mode(insn, false)) pr_notice("Disabled %s support\n", insn->ops->name); - } break; } @@ -111,10 +161,9 @@ static int update_insn_emulation_mode(struct insn_emulation *insn, register_emulation_hooks(insn->ops); break; case INSN_HW: - if (insn->ops->set_hw_mode && insn->ops->set_hw_mode(true)) + ret = run_all_cpu_set_hw_mode(insn, true); + if (!ret) pr_notice("Enabled %s support\n", insn->ops->name); - else - ret = -EINVAL; break; } @@ -133,6 +182,8 @@ static void register_insn_emulation(struct insn_emulation_ops *ops) switch (ops->status) { case INSN_DEPRECATED: insn->current_mode = INSN_EMULATE; + /* Disable the HW mode if it was turned on at early boot time */ + run_all_cpu_set_hw_mode(insn, false); insn->max = INSN_HW; break; case INSN_OBSOLETE: @@ -453,8 +504,6 @@ ret: return 0; } -#define SCTLR_EL1_CP15BEN (1 << 5) - static inline void config_sctlr_el1(u32 clear, u32 set) { u32 val; @@ -465,48 +514,13 @@ static inline void config_sctlr_el1(u32 clear, u32 set) asm volatile("msr sctlr_el1, %0" : : "r" (val)); } -static void enable_cp15_ben(void *info) -{ - config_sctlr_el1(0, SCTLR_EL1_CP15BEN); -} - -static void disable_cp15_ben(void *info) -{ - config_sctlr_el1(SCTLR_EL1_CP15BEN, 0); -} - -static int cpu_hotplug_notify(struct notifier_block *b, - unsigned long action, void *hcpu) -{ - switch (action) { - case CPU_STARTING: - case CPU_STARTING_FROZEN: - enable_cp15_ben(NULL); - return NOTIFY_DONE; - case CPU_DYING: - case CPU_DYING_FROZEN: - disable_cp15_ben(NULL); - return NOTIFY_DONE; - } - - return NOTIFY_OK; -} - -static struct notifier_block cpu_hotplug_notifier = { - .notifier_call = cpu_hotplug_notify, -}; - static int cp15_barrier_set_hw_mode(bool enable) { - if (enable) { - register_cpu_notifier(&cpu_hotplug_notifier); - on_each_cpu(enable_cp15_ben, NULL, true); - } else { - unregister_cpu_notifier(&cpu_hotplug_notifier); - on_each_cpu(disable_cp15_ben, NULL, true); - } - - return true; + if (enable) + config_sctlr_el1(0, SCTLR_EL1_CP15BEN); + else + config_sctlr_el1(SCTLR_EL1_CP15BEN, 0); + return 0; } static struct undef_hook cp15_barrier_hooks[] = { @@ -534,6 +548,93 @@ static struct insn_emulation_ops cp15_barrier_ops = { .set_hw_mode = cp15_barrier_set_hw_mode, }; +static int setend_set_hw_mode(bool enable) +{ + if (!cpu_supports_mixed_endian_el0()) + return -EINVAL; + + if (enable) + config_sctlr_el1(SCTLR_EL1_SED, 0); + else + config_sctlr_el1(0, SCTLR_EL1_SED); + return 0; +} + +static int compat_setend_handler(struct pt_regs *regs, u32 big_endian) +{ + char *insn; + + perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, regs->pc); + + if (big_endian) { + insn = "setend be"; + regs->pstate |= COMPAT_PSR_E_BIT; + } else { + insn = "setend le"; + regs->pstate &= ~COMPAT_PSR_E_BIT; + } + + trace_instruction_emulation(insn, regs->pc); + pr_warn_ratelimited("\"%s\" (%ld) uses deprecated setend instruction at 0x%llx\n", + current->comm, (unsigned long)current->pid, regs->pc); + + return 0; +} + +static int a32_setend_handler(struct pt_regs *regs, u32 instr) +{ + int rc = compat_setend_handler(regs, (instr >> 9) & 1); + regs->pc += 4; + return rc; +} + +static int t16_setend_handler(struct pt_regs *regs, u32 instr) +{ + int rc = compat_setend_handler(regs, (instr >> 3) & 1); + regs->pc += 2; + return rc; +} + +static struct undef_hook setend_hooks[] = { + { + .instr_mask = 0xfffffdff, + .instr_val = 0xf1010000, + .pstate_mask = COMPAT_PSR_MODE_MASK, + .pstate_val = COMPAT_PSR_MODE_USR, + .fn = a32_setend_handler, + }, + { + /* Thumb mode */ + .instr_mask = 0x0000fff7, + .instr_val = 0x0000b650, + .pstate_mask = (COMPAT_PSR_T_BIT | COMPAT_PSR_MODE_MASK), + .pstate_val = (COMPAT_PSR_T_BIT | COMPAT_PSR_MODE_USR), + .fn = t16_setend_handler, + }, + {} +}; + +static struct insn_emulation_ops setend_ops = { + .name = "setend", + .status = INSN_DEPRECATED, + .hooks = setend_hooks, + .set_hw_mode = setend_set_hw_mode, +}; + +static int insn_cpu_hotplug_notify(struct notifier_block *b, + unsigned long action, void *hcpu) +{ + int rc = 0; + if ((action & ~CPU_TASKS_FROZEN) == CPU_STARTING) + rc = run_all_insn_set_hw_mode((unsigned long)hcpu); + + return notifier_from_errno(rc); +} + +static struct notifier_block insn_cpu_hotplug_notifier = { + .notifier_call = insn_cpu_hotplug_notify, +}; + /* * Invoked as late_initcall, since not needed before init spawned. */ @@ -545,6 +646,14 @@ static int __init armv8_deprecated_init(void) if (IS_ENABLED(CONFIG_CP15_BARRIER_EMULATION)) register_insn_emulation(&cp15_barrier_ops); + if (IS_ENABLED(CONFIG_SETEND_EMULATION)) { + if(system_supports_mixed_endian_el0()) + register_insn_emulation(&setend_ops); + else + pr_info("setend instruction emulation is not supported on the system"); + } + + register_cpu_notifier(&insn_cpu_hotplug_notifier); register_insn_emulation_sysctl(ctl_abi); return 0; diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c index 9a9fce090d58..a2ae19403abb 100644 --- a/arch/arm64/kernel/asm-offsets.c +++ b/arch/arm64/kernel/asm-offsets.c @@ -152,7 +152,7 @@ int main(void) DEFINE(KVM_VTTBR, offsetof(struct kvm, arch.vttbr)); DEFINE(KVM_VGIC_VCTRL, offsetof(struct kvm, arch.vgic.vctrl_base)); #endif -#ifdef CONFIG_ARM64_CPU_SUSPEND +#ifdef CONFIG_CPU_PM DEFINE(CPU_SUSPEND_SZ, sizeof(struct cpu_suspend_ctx)); DEFINE(CPU_CTX_SP, offsetof(struct cpu_suspend_ctx, sp)); DEFINE(MPIDR_HASH_MASK, offsetof(struct mpidr_hash, mask)); diff --git a/arch/arm64/kernel/cacheinfo.c b/arch/arm64/kernel/cacheinfo.c new file mode 100644 index 000000000000..b8629d52fba9 --- /dev/null +++ b/arch/arm64/kernel/cacheinfo.c @@ -0,0 +1,128 @@ +/* + * ARM64 cacheinfo support + * + * Copyright (C) 2015 ARM Ltd. + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/bitops.h> +#include <linux/cacheinfo.h> +#include <linux/cpu.h> +#include <linux/compiler.h> +#include <linux/of.h> + +#include <asm/cachetype.h> +#include <asm/processor.h> + +#define MAX_CACHE_LEVEL 7 /* Max 7 level supported */ +/* Ctypen, bits[3(n - 1) + 2 : 3(n - 1)], for n = 1 to 7 */ +#define CLIDR_CTYPE_SHIFT(level) (3 * (level - 1)) +#define CLIDR_CTYPE_MASK(level) (7 << CLIDR_CTYPE_SHIFT(level)) +#define CLIDR_CTYPE(clidr, level) \ + (((clidr) & CLIDR_CTYPE_MASK(level)) >> CLIDR_CTYPE_SHIFT(level)) + +static inline enum cache_type get_cache_type(int level) +{ + u64 clidr; + + if (level > MAX_CACHE_LEVEL) + return CACHE_TYPE_NOCACHE; + asm volatile ("mrs %x0, clidr_el1" : "=r" (clidr)); + return CLIDR_CTYPE(clidr, level); +} + +/* + * Cache Size Selection Register(CSSELR) selects which Cache Size ID + * Register(CCSIDR) is accessible by specifying the required cache + * level and the cache type. We need to ensure that no one else changes + * CSSELR by calling this in non-preemtible context + */ +u64 __attribute_const__ cache_get_ccsidr(u64 csselr) +{ + u64 ccsidr; + + WARN_ON(preemptible()); + + /* Put value into CSSELR */ + asm volatile("msr csselr_el1, %x0" : : "r" (csselr)); + isb(); + /* Read result out of CCSIDR */ + asm volatile("mrs %x0, ccsidr_el1" : "=r" (ccsidr)); + + return ccsidr; +} + +static void ci_leaf_init(struct cacheinfo *this_leaf, + enum cache_type type, unsigned int level) +{ + bool is_icache = type & CACHE_TYPE_INST; + u64 tmp = cache_get_ccsidr((level - 1) << 1 | is_icache); + + this_leaf->level = level; + this_leaf->type = type; + this_leaf->coherency_line_size = CACHE_LINESIZE(tmp); + this_leaf->number_of_sets = CACHE_NUMSETS(tmp); + this_leaf->ways_of_associativity = CACHE_ASSOCIATIVITY(tmp); + this_leaf->size = this_leaf->number_of_sets * + this_leaf->coherency_line_size * this_leaf->ways_of_associativity; + this_leaf->attributes = + ((tmp & CCSIDR_EL1_WRITE_THROUGH) ? CACHE_WRITE_THROUGH : 0) | + ((tmp & CCSIDR_EL1_WRITE_BACK) ? CACHE_WRITE_BACK : 0) | + ((tmp & CCSIDR_EL1_READ_ALLOCATE) ? CACHE_READ_ALLOCATE : 0) | + ((tmp & CCSIDR_EL1_WRITE_ALLOCATE) ? CACHE_WRITE_ALLOCATE : 0); +} + +static int __init_cache_level(unsigned int cpu) +{ + unsigned int ctype, level, leaves; + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + + for (level = 1, leaves = 0; level <= MAX_CACHE_LEVEL; level++) { + ctype = get_cache_type(level); + if (ctype == CACHE_TYPE_NOCACHE) { + level--; + break; + } + /* Separate instruction and data caches */ + leaves += (ctype == CACHE_TYPE_SEPARATE) ? 2 : 1; + } + + this_cpu_ci->num_levels = level; + this_cpu_ci->num_leaves = leaves; + return 0; +} + +static int __populate_cache_leaves(unsigned int cpu) +{ + unsigned int level, idx; + enum cache_type type; + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + struct cacheinfo *this_leaf = this_cpu_ci->info_list; + + for (idx = 0, level = 1; level <= this_cpu_ci->num_levels && + idx < this_cpu_ci->num_leaves; idx++, level++) { + type = get_cache_type(level); + if (type == CACHE_TYPE_SEPARATE) { + ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level); + ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level); + } else { + ci_leaf_init(this_leaf++, type, level); + } + } + return 0; +} + +DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level) +DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves) diff --git a/arch/arm64/kernel/cpuidle.c b/arch/arm64/kernel/cpuidle.c index 19d17f51db37..5c0896647fd1 100644 --- a/arch/arm64/kernel/cpuidle.c +++ b/arch/arm64/kernel/cpuidle.c @@ -29,3 +29,23 @@ int cpu_init_idle(unsigned int cpu) of_node_put(cpu_node); return ret; } + +/** + * cpu_suspend() - function to enter a low-power idle state + * @arg: argument to pass to CPU suspend operations + * + * Return: 0 on success, -EOPNOTSUPP if CPU suspend hook not initialized, CPU + * operations back-end error code otherwise. + */ +int cpu_suspend(unsigned long arg) +{ + int cpu = smp_processor_id(); + + /* + * If cpu_ops have not been registered or suspend + * has not been initialized, cpu_suspend call fails early. + */ + if (!cpu_ops[cpu] || !cpu_ops[cpu]->cpu_suspend) + return -EOPNOTSUPP; + return cpu_ops[cpu]->cpu_suspend(arg); +} diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c index 07d435cf2eea..929855691dae 100644 --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c @@ -35,6 +35,7 @@ */ DEFINE_PER_CPU(struct cpuinfo_arm64, cpu_data); static struct cpuinfo_arm64 boot_cpu_data; +static bool mixed_endian_el0 = true; static char *icache_policy_str[] = { [ICACHE_POLICY_RESERVED] = "RESERVED/UNKNOWN", @@ -68,6 +69,26 @@ static void cpuinfo_detect_icache_policy(struct cpuinfo_arm64 *info) pr_info("Detected %s I-cache on CPU%d\n", icache_policy_str[l1ip], cpu); } +bool cpu_supports_mixed_endian_el0(void) +{ + return id_aa64mmfr0_mixed_endian_el0(read_cpuid(ID_AA64MMFR0_EL1)); +} + +bool system_supports_mixed_endian_el0(void) +{ + return mixed_endian_el0; +} + +static void update_mixed_endian_el0_support(struct cpuinfo_arm64 *info) +{ + mixed_endian_el0 &= id_aa64mmfr0_mixed_endian_el0(info->reg_id_aa64mmfr0); +} + +static void update_cpu_features(struct cpuinfo_arm64 *info) +{ + update_mixed_endian_el0_support(info); +} + static int check_reg_mask(char *name, u64 mask, u64 boot, u64 cur, int cpu) { if ((boot & mask) == (cur & mask)) @@ -215,6 +236,7 @@ static void __cpuinfo_store_cpu(struct cpuinfo_arm64 *info) cpuinfo_detect_icache_policy(info); check_local_cpu_errata(); + update_cpu_features(info); } void cpuinfo_store_cpu(void) @@ -231,15 +253,3 @@ void __init cpuinfo_store_boot_cpu(void) boot_cpu_data = *info; } - -u64 __attribute_const__ icache_get_ccsidr(void) -{ - u64 ccsidr; - - WARN_ON(preemptible()); - - /* Select L1 I-cache and read its size ID register */ - asm("msr csselr_el1, %1; isb; mrs %0, ccsidr_el1" - : "=r"(ccsidr) : "r"(1L)); - return ccsidr; -} diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c index 2bb4347d0edf..b42c7b480e1e 100644 --- a/arch/arm64/kernel/efi.c +++ b/arch/arm64/kernel/efi.c @@ -11,27 +11,46 @@ * */ +#include <linux/atomic.h> #include <linux/dmi.h> #include <linux/efi.h> #include <linux/export.h> #include <linux/memblock.h> +#include <linux/mm_types.h> #include <linux/bootmem.h> #include <linux/of.h> #include <linux/of_fdt.h> +#include <linux/preempt.h> +#include <linux/rbtree.h> +#include <linux/rwsem.h> #include <linux/sched.h> #include <linux/slab.h> +#include <linux/spinlock.h> #include <asm/cacheflush.h> #include <asm/efi.h> #include <asm/tlbflush.h> #include <asm/mmu_context.h> +#include <asm/mmu.h> +#include <asm/pgtable.h> struct efi_memory_map memmap; -static efi_runtime_services_t *runtime; - static u64 efi_system_table; +static pgd_t efi_pgd[PTRS_PER_PGD] __page_aligned_bss; + +static struct mm_struct efi_mm = { + .mm_rb = RB_ROOT, + .pgd = efi_pgd, + .mm_users = ATOMIC_INIT(2), + .mm_count = ATOMIC_INIT(1), + .mmap_sem = __RWSEM_INITIALIZER(efi_mm.mmap_sem), + .page_table_lock = __SPIN_LOCK_UNLOCKED(efi_mm.page_table_lock), + .mmlist = LIST_HEAD_INIT(efi_mm.mmlist), + INIT_MM_CONTEXT(efi_mm) +}; + static int uefi_debug __initdata; static int __init uefi_debug_setup(char *str) { @@ -48,30 +67,33 @@ static int __init is_normal_ram(efi_memory_desc_t *md) return 0; } -static void __init efi_setup_idmap(void) +/* + * Translate a EFI virtual address into a physical address: this is necessary, + * as some data members of the EFI system table are virtually remapped after + * SetVirtualAddressMap() has been called. + */ +static phys_addr_t efi_to_phys(unsigned long addr) { - struct memblock_region *r; efi_memory_desc_t *md; - u64 paddr, npages, size; - for_each_memblock(memory, r) - create_id_mapping(r->base, r->size, 0); - - /* map runtime io spaces */ for_each_efi_memory_desc(&memmap, md) { - if (!(md->attribute & EFI_MEMORY_RUNTIME) || is_normal_ram(md)) + if (!(md->attribute & EFI_MEMORY_RUNTIME)) continue; - paddr = md->phys_addr; - npages = md->num_pages; - memrange_efi_to_native(&paddr, &npages); - size = npages << PAGE_SHIFT; - create_id_mapping(paddr, size, 1); + if (md->virt_addr == 0) + /* no virtual mapping has been installed by the stub */ + break; + if (md->virt_addr <= addr && + (addr - md->virt_addr) < (md->num_pages << EFI_PAGE_SHIFT)) + return md->phys_addr + addr - md->virt_addr; } + return addr; } static int __init uefi_init(void) { efi_char16_t *c16; + void *config_tables; + u64 table_size; char vendor[100] = "unknown"; int i, retval; @@ -99,7 +121,7 @@ static int __init uefi_init(void) efi.systab->hdr.revision & 0xffff); /* Show what we know for posterity */ - c16 = early_memremap(efi.systab->fw_vendor, + c16 = early_memremap(efi_to_phys(efi.systab->fw_vendor), sizeof(vendor)); if (c16) { for (i = 0; i < (int) sizeof(vendor) - 1 && *c16; ++i) @@ -112,8 +134,14 @@ static int __init uefi_init(void) efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, vendor); - retval = efi_config_init(NULL); + table_size = sizeof(efi_config_table_64_t) * efi.systab->nr_tables; + config_tables = early_memremap(efi_to_phys(efi.systab->tables), + table_size); + retval = efi_config_parse_tables(config_tables, efi.systab->nr_tables, + sizeof(efi_config_table_64_t), NULL); + + early_memunmap(config_tables, table_size); out: early_memunmap(efi.systab, sizeof(efi_system_table_t)); return retval; @@ -163,9 +191,7 @@ static __init void reserve_regions(void) if (is_normal_ram(md)) early_init_dt_add_memory_arch(paddr, size); - if (is_reserve_region(md) || - md->type == EFI_BOOT_SERVICES_CODE || - md->type == EFI_BOOT_SERVICES_DATA) { + if (is_reserve_region(md)) { memblock_reserve(paddr, size); if (uefi_debug) pr_cont("*"); @@ -178,123 +204,6 @@ static __init void reserve_regions(void) set_bit(EFI_MEMMAP, &efi.flags); } - -static u64 __init free_one_region(u64 start, u64 end) -{ - u64 size = end - start; - - if (uefi_debug) - pr_info(" EFI freeing: 0x%012llx-0x%012llx\n", start, end - 1); - - free_bootmem_late(start, size); - return size; -} - -static u64 __init free_region(u64 start, u64 end) -{ - u64 map_start, map_end, total = 0; - - if (end <= start) - return total; - - map_start = (u64)memmap.phys_map; - map_end = PAGE_ALIGN(map_start + (memmap.map_end - memmap.map)); - map_start &= PAGE_MASK; - - if (start < map_end && end > map_start) { - /* region overlaps UEFI memmap */ - if (start < map_start) - total += free_one_region(start, map_start); - - if (map_end < end) - total += free_one_region(map_end, end); - } else - total += free_one_region(start, end); - - return total; -} - -static void __init free_boot_services(void) -{ - u64 total_freed = 0; - u64 keep_end, free_start, free_end; - efi_memory_desc_t *md; - - /* - * If kernel uses larger pages than UEFI, we have to be careful - * not to inadvertantly free memory we want to keep if there is - * overlap at the kernel page size alignment. We do not want to - * free is_reserve_region() memory nor the UEFI memmap itself. - * - * The memory map is sorted, so we keep track of the end of - * any previous region we want to keep, remember any region - * we want to free and defer freeing it until we encounter - * the next region we want to keep. This way, before freeing - * it, we can clip it as needed to avoid freeing memory we - * want to keep for UEFI. - */ - - keep_end = 0; - free_start = 0; - - for_each_efi_memory_desc(&memmap, md) { - u64 paddr, npages, size; - - if (is_reserve_region(md)) { - /* - * We don't want to free any memory from this region. - */ - if (free_start) { - /* adjust free_end then free region */ - if (free_end > md->phys_addr) - free_end -= PAGE_SIZE; - total_freed += free_region(free_start, free_end); - free_start = 0; - } - keep_end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT); - continue; - } - - if (md->type != EFI_BOOT_SERVICES_CODE && - md->type != EFI_BOOT_SERVICES_DATA) { - /* no need to free this region */ - continue; - } - - /* - * We want to free memory from this region. - */ - paddr = md->phys_addr; - npages = md->num_pages; - memrange_efi_to_native(&paddr, &npages); - size = npages << PAGE_SHIFT; - - if (free_start) { - if (paddr <= free_end) - free_end = paddr + size; - else { - total_freed += free_region(free_start, free_end); - free_start = paddr; - free_end = paddr + size; - } - } else { - free_start = paddr; - free_end = paddr + size; - } - if (free_start < keep_end) { - free_start += PAGE_SIZE; - if (free_start >= free_end) - free_start = 0; - } - } - if (free_start) - total_freed += free_region(free_start, free_end); - - if (total_freed) - pr_info("Freed 0x%llx bytes of EFI boot services memory", - total_freed); -} - void __init efi_init(void) { struct efi_fdt_params params; @@ -317,159 +226,100 @@ void __init efi_init(void) return; reserve_regions(); + early_memunmap(memmap.map, params.mmap_size); } -void __init efi_idmap_init(void) +static bool __init efi_virtmap_init(void) { - if (!efi_enabled(EFI_BOOT)) - return; - - /* boot time idmap_pg_dir is incomplete, so fill in missing parts */ - efi_setup_idmap(); - early_memunmap(memmap.map, memmap.map_end - memmap.map); -} - -static int __init remap_region(efi_memory_desc_t *md, void **new) -{ - u64 paddr, vaddr, npages, size; - - paddr = md->phys_addr; - npages = md->num_pages; - memrange_efi_to_native(&paddr, &npages); - size = npages << PAGE_SHIFT; + efi_memory_desc_t *md; - if (is_normal_ram(md)) - vaddr = (__force u64)ioremap_cache(paddr, size); - else - vaddr = (__force u64)ioremap(paddr, size); + for_each_efi_memory_desc(&memmap, md) { + u64 paddr, npages, size; + pgprot_t prot; - if (!vaddr) { - pr_err("Unable to remap 0x%llx pages @ %p\n", - npages, (void *)paddr); - return 0; - } + if (!(md->attribute & EFI_MEMORY_RUNTIME)) + continue; + if (md->virt_addr == 0) + return false; - /* adjust for any rounding when EFI and system pagesize differs */ - md->virt_addr = vaddr + (md->phys_addr - paddr); + paddr = md->phys_addr; + npages = md->num_pages; + memrange_efi_to_native(&paddr, &npages); + size = npages << PAGE_SHIFT; - if (uefi_debug) - pr_info(" EFI remap 0x%012llx => %p\n", + pr_info(" EFI remap 0x%016llx => %p\n", md->phys_addr, (void *)md->virt_addr); - memcpy(*new, md, memmap.desc_size); - *new += memmap.desc_size; - - return 1; + /* + * Only regions of type EFI_RUNTIME_SERVICES_CODE need to be + * executable, everything else can be mapped with the XN bits + * set. + */ + if (!is_normal_ram(md)) + prot = __pgprot(PROT_DEVICE_nGnRE); + else if (md->type == EFI_RUNTIME_SERVICES_CODE) + prot = PAGE_KERNEL_EXEC; + else + prot = PAGE_KERNEL; + + create_pgd_mapping(&efi_mm, paddr, md->virt_addr, size, prot); + } + return true; } /* - * Switch UEFI from an identity map to a kernel virtual map + * Enable the UEFI Runtime Services if all prerequisites are in place, i.e., + * non-early mapping of the UEFI system table and virtual mappings for all + * EFI_MEMORY_RUNTIME regions. */ -static int __init arm64_enter_virtual_mode(void) +static int __init arm64_enable_runtime_services(void) { - efi_memory_desc_t *md; - phys_addr_t virtmap_phys; - void *virtmap, *virt_md; - efi_status_t status; u64 mapsize; - int count = 0; - unsigned long flags; if (!efi_enabled(EFI_BOOT)) { pr_info("EFI services will not be available.\n"); return -1; } - mapsize = memmap.map_end - memmap.map; - if (efi_runtime_disabled()) { pr_info("EFI runtime services will be disabled.\n"); return -1; } pr_info("Remapping and enabling EFI services.\n"); - /* replace early memmap mapping with permanent mapping */ + + mapsize = memmap.map_end - memmap.map; memmap.map = (__force void *)ioremap_cache((phys_addr_t)memmap.phys_map, mapsize); - memmap.map_end = memmap.map + mapsize; - - efi.memmap = &memmap; - - /* Map the runtime regions */ - virtmap = kmalloc(mapsize, GFP_KERNEL); - if (!virtmap) { - pr_err("Failed to allocate EFI virtual memmap\n"); + if (!memmap.map) { + pr_err("Failed to remap EFI memory map\n"); return -1; } - virtmap_phys = virt_to_phys(virtmap); - virt_md = virtmap; - - for_each_efi_memory_desc(&memmap, md) { - if (!(md->attribute & EFI_MEMORY_RUNTIME)) - continue; - if (!remap_region(md, &virt_md)) - goto err_unmap; - ++count; - } + memmap.map_end = memmap.map + mapsize; + efi.memmap = &memmap; - efi.systab = (__force void *)efi_lookup_mapped_addr(efi_system_table); + efi.systab = (__force void *)ioremap_cache(efi_system_table, + sizeof(efi_system_table_t)); if (!efi.systab) { - /* - * If we have no virtual mapping for the System Table at this - * point, the memory map doesn't cover the physical offset where - * it resides. This means the System Table will be inaccessible - * to Runtime Services themselves once the virtual mapping is - * installed. - */ - pr_err("Failed to remap EFI System Table -- buggy firmware?\n"); - goto err_unmap; + pr_err("Failed to remap EFI System Table\n"); + return -1; } set_bit(EFI_SYSTEM_TABLES, &efi.flags); - local_irq_save(flags); - cpu_switch_mm(idmap_pg_dir, &init_mm); - - /* Call SetVirtualAddressMap with the physical address of the map */ - runtime = efi.systab->runtime; - efi.set_virtual_address_map = runtime->set_virtual_address_map; - - status = efi.set_virtual_address_map(count * memmap.desc_size, - memmap.desc_size, - memmap.desc_version, - (efi_memory_desc_t *)virtmap_phys); - cpu_set_reserved_ttbr0(); - flush_tlb_all(); - local_irq_restore(flags); - - kfree(virtmap); - - free_boot_services(); - - if (status != EFI_SUCCESS) { - pr_err("Failed to set EFI virtual address map! [%lx]\n", - status); + if (!efi_virtmap_init()) { + pr_err("No UEFI virtual mapping was installed -- runtime services will not be available\n"); return -1; } /* Set up runtime services function pointers */ - runtime = efi.systab->runtime; efi_native_runtime_setup(); set_bit(EFI_RUNTIME_SERVICES, &efi.flags); efi.runtime_version = efi.systab->hdr.revision; return 0; - -err_unmap: - /* unmap all mappings that succeeded: there are 'count' of those */ - for (virt_md = virtmap; count--; virt_md += memmap.desc_size) { - md = virt_md; - iounmap((__force void __iomem *)md->virt_addr); - } - kfree(virtmap); - return -1; } -early_initcall(arm64_enter_virtual_mode); +early_initcall(arm64_enable_runtime_services); static int __init arm64_dmi_init(void) { @@ -484,3 +334,23 @@ static int __init arm64_dmi_init(void) return 0; } core_initcall(arm64_dmi_init); + +static void efi_set_pgd(struct mm_struct *mm) +{ + cpu_switch_mm(mm->pgd, mm); + flush_tlb_all(); + if (icache_is_aivivt()) + __flush_icache_all(); +} + +void efi_virtmap_load(void) +{ + preempt_disable(); + efi_set_pgd(&efi_mm); +} + +void efi_virtmap_unload(void) +{ + efi_set_pgd(current->active_mm); + preempt_enable(); +} diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index fd4fa374e5d2..cf21bb3bf752 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -269,18 +269,18 @@ ENDPROC(el1_error_invalid) el1_sync: kernel_entry 1 mrs x1, esr_el1 // read the syndrome register - lsr x24, x1, #ESR_EL1_EC_SHIFT // exception class - cmp x24, #ESR_EL1_EC_DABT_EL1 // data abort in EL1 + lsr x24, x1, #ESR_ELx_EC_SHIFT // exception class + cmp x24, #ESR_ELx_EC_DABT_CUR // data abort in EL1 b.eq el1_da - cmp x24, #ESR_EL1_EC_SYS64 // configurable trap + cmp x24, #ESR_ELx_EC_SYS64 // configurable trap b.eq el1_undef - cmp x24, #ESR_EL1_EC_SP_ALIGN // stack alignment exception + cmp x24, #ESR_ELx_EC_SP_ALIGN // stack alignment exception b.eq el1_sp_pc - cmp x24, #ESR_EL1_EC_PC_ALIGN // pc alignment exception + cmp x24, #ESR_ELx_EC_PC_ALIGN // pc alignment exception b.eq el1_sp_pc - cmp x24, #ESR_EL1_EC_UNKNOWN // unknown exception in EL1 + cmp x24, #ESR_ELx_EC_UNKNOWN // unknown exception in EL1 b.eq el1_undef - cmp x24, #ESR_EL1_EC_BREAKPT_EL1 // debug exception in EL1 + cmp x24, #ESR_ELx_EC_BREAKPT_CUR // debug exception in EL1 b.ge el1_dbg b el1_inv el1_da: @@ -318,7 +318,7 @@ el1_dbg: /* * Debug exception handling */ - cmp x24, #ESR_EL1_EC_BRK64 // if BRK64 + cmp x24, #ESR_ELx_EC_BRK64 // if BRK64 cinc x24, x24, eq // set bit '0' tbz x24, #0, el1_inv // EL1 only mrs x0, far_el1 @@ -375,26 +375,26 @@ el1_preempt: el0_sync: kernel_entry 0 mrs x25, esr_el1 // read the syndrome register - lsr x24, x25, #ESR_EL1_EC_SHIFT // exception class - cmp x24, #ESR_EL1_EC_SVC64 // SVC in 64-bit state + lsr x24, x25, #ESR_ELx_EC_SHIFT // exception class + cmp x24, #ESR_ELx_EC_SVC64 // SVC in 64-bit state b.eq el0_svc - cmp x24, #ESR_EL1_EC_DABT_EL0 // data abort in EL0 + cmp x24, #ESR_ELx_EC_DABT_LOW // data abort in EL0 b.eq el0_da - cmp x24, #ESR_EL1_EC_IABT_EL0 // instruction abort in EL0 + cmp x24, #ESR_ELx_EC_IABT_LOW // instruction abort in EL0 b.eq el0_ia - cmp x24, #ESR_EL1_EC_FP_ASIMD // FP/ASIMD access + cmp x24, #ESR_ELx_EC_FP_ASIMD // FP/ASIMD access b.eq el0_fpsimd_acc - cmp x24, #ESR_EL1_EC_FP_EXC64 // FP/ASIMD exception + cmp x24, #ESR_ELx_EC_FP_EXC64 // FP/ASIMD exception b.eq el0_fpsimd_exc - cmp x24, #ESR_EL1_EC_SYS64 // configurable trap + cmp x24, #ESR_ELx_EC_SYS64 // configurable trap b.eq el0_undef - cmp x24, #ESR_EL1_EC_SP_ALIGN // stack alignment exception + cmp x24, #ESR_ELx_EC_SP_ALIGN // stack alignment exception b.eq el0_sp_pc - cmp x24, #ESR_EL1_EC_PC_ALIGN // pc alignment exception + cmp x24, #ESR_ELx_EC_PC_ALIGN // pc alignment exception b.eq el0_sp_pc - cmp x24, #ESR_EL1_EC_UNKNOWN // unknown exception in EL0 + cmp x24, #ESR_ELx_EC_UNKNOWN // unknown exception in EL0 b.eq el0_undef - cmp x24, #ESR_EL1_EC_BREAKPT_EL0 // debug exception in EL0 + cmp x24, #ESR_ELx_EC_BREAKPT_LOW // debug exception in EL0 b.ge el0_dbg b el0_inv @@ -403,37 +403,37 @@ el0_sync: el0_sync_compat: kernel_entry 0, 32 mrs x25, esr_el1 // read the syndrome register - lsr x24, x25, #ESR_EL1_EC_SHIFT // exception class - cmp x24, #ESR_EL1_EC_SVC32 // SVC in 32-bit state + lsr x24, x25, #ESR_ELx_EC_SHIFT // exception class + cmp x24, #ESR_ELx_EC_SVC32 // SVC in 32-bit state b.eq el0_svc_compat - cmp x24, #ESR_EL1_EC_DABT_EL0 // data abort in EL0 + cmp x24, #ESR_ELx_EC_DABT_LOW // data abort in EL0 b.eq el0_da - cmp x24, #ESR_EL1_EC_IABT_EL0 // instruction abort in EL0 + cmp x24, #ESR_ELx_EC_IABT_LOW // instruction abort in EL0 b.eq el0_ia - cmp x24, #ESR_EL1_EC_FP_ASIMD // FP/ASIMD access + cmp x24, #ESR_ELx_EC_FP_ASIMD // FP/ASIMD access b.eq el0_fpsimd_acc - cmp x24, #ESR_EL1_EC_FP_EXC32 // FP/ASIMD exception + cmp x24, #ESR_ELx_EC_FP_EXC32 // FP/ASIMD exception b.eq el0_fpsimd_exc - cmp x24, #ESR_EL1_EC_UNKNOWN // unknown exception in EL0 + cmp x24, #ESR_ELx_EC_UNKNOWN // unknown exception in EL0 b.eq el0_undef - cmp x24, #ESR_EL1_EC_CP15_32 // CP15 MRC/MCR trap + cmp x24, #ESR_ELx_EC_CP15_32 // CP15 MRC/MCR trap b.eq el0_undef - cmp x24, #ESR_EL1_EC_CP15_64 // CP15 MRRC/MCRR trap + cmp x24, #ESR_ELx_EC_CP15_64 // CP15 MRRC/MCRR trap b.eq el0_undef - cmp x24, #ESR_EL1_EC_CP14_MR // CP14 MRC/MCR trap + cmp x24, #ESR_ELx_EC_CP14_MR // CP14 MRC/MCR trap b.eq el0_undef - cmp x24, #ESR_EL1_EC_CP14_LS // CP14 LDC/STC trap + cmp x24, #ESR_ELx_EC_CP14_LS // CP14 LDC/STC trap b.eq el0_undef - cmp x24, #ESR_EL1_EC_CP14_64 // CP14 MRRC/MCRR trap + cmp x24, #ESR_ELx_EC_CP14_64 // CP14 MRRC/MCRR trap b.eq el0_undef - cmp x24, #ESR_EL1_EC_BREAKPT_EL0 // debug exception in EL0 + cmp x24, #ESR_ELx_EC_BREAKPT_LOW // debug exception in EL0 b.ge el0_dbg b el0_inv el0_svc_compat: /* * AArch32 syscall handling */ - adr stbl, compat_sys_call_table // load compat syscall table pointer + adrp stbl, compat_sys_call_table // load compat syscall table pointer uxtw scno, w7 // syscall number in w7 (r7) mov sc_nr, #__NR_compat_syscalls b el0_svc_naked diff --git a/arch/arm64/kernel/sys32.S b/arch/arm64/kernel/entry32.S index 423a5b3fc2be..9a8f6ae2530e 100644 --- a/arch/arm64/kernel/sys32.S +++ b/arch/arm64/kernel/entry32.S @@ -27,26 +27,26 @@ * System call wrappers for the AArch32 compatibility layer. */ -compat_sys_sigreturn_wrapper: +ENTRY(compat_sys_sigreturn_wrapper) mov x0, sp mov x27, #0 // prevent syscall restart handling (why) b compat_sys_sigreturn ENDPROC(compat_sys_sigreturn_wrapper) -compat_sys_rt_sigreturn_wrapper: +ENTRY(compat_sys_rt_sigreturn_wrapper) mov x0, sp mov x27, #0 // prevent syscall restart handling (why) b compat_sys_rt_sigreturn ENDPROC(compat_sys_rt_sigreturn_wrapper) -compat_sys_statfs64_wrapper: +ENTRY(compat_sys_statfs64_wrapper) mov w3, #84 cmp w1, #88 csel w1, w3, w1, eq b compat_sys_statfs64 ENDPROC(compat_sys_statfs64_wrapper) -compat_sys_fstatfs64_wrapper: +ENTRY(compat_sys_fstatfs64_wrapper) mov w3, #84 cmp w1, #88 csel w1, w3, w1, eq @@ -58,33 +58,33 @@ ENDPROC(compat_sys_fstatfs64_wrapper) * in registers or that take 32-bit parameters which require sign * extension. */ -compat_sys_pread64_wrapper: +ENTRY(compat_sys_pread64_wrapper) regs_to_64 x3, x4, x5 b sys_pread64 ENDPROC(compat_sys_pread64_wrapper) -compat_sys_pwrite64_wrapper: +ENTRY(compat_sys_pwrite64_wrapper) regs_to_64 x3, x4, x5 b sys_pwrite64 ENDPROC(compat_sys_pwrite64_wrapper) -compat_sys_truncate64_wrapper: +ENTRY(compat_sys_truncate64_wrapper) regs_to_64 x1, x2, x3 b sys_truncate ENDPROC(compat_sys_truncate64_wrapper) -compat_sys_ftruncate64_wrapper: +ENTRY(compat_sys_ftruncate64_wrapper) regs_to_64 x1, x2, x3 b sys_ftruncate ENDPROC(compat_sys_ftruncate64_wrapper) -compat_sys_readahead_wrapper: +ENTRY(compat_sys_readahead_wrapper) regs_to_64 x1, x2, x3 mov w2, w4 b sys_readahead ENDPROC(compat_sys_readahead_wrapper) -compat_sys_fadvise64_64_wrapper: +ENTRY(compat_sys_fadvise64_64_wrapper) mov w6, w1 regs_to_64 x1, x2, x3 regs_to_64 x2, x4, x5 @@ -92,24 +92,14 @@ compat_sys_fadvise64_64_wrapper: b sys_fadvise64_64 ENDPROC(compat_sys_fadvise64_64_wrapper) -compat_sys_sync_file_range2_wrapper: +ENTRY(compat_sys_sync_file_range2_wrapper) regs_to_64 x2, x2, x3 regs_to_64 x3, x4, x5 b sys_sync_file_range2 ENDPROC(compat_sys_sync_file_range2_wrapper) -compat_sys_fallocate_wrapper: +ENTRY(compat_sys_fallocate_wrapper) regs_to_64 x2, x2, x3 regs_to_64 x3, x4, x5 b sys_fallocate ENDPROC(compat_sys_fallocate_wrapper) - -#undef __SYSCALL -#define __SYSCALL(x, y) .quad y // x - -/* - * The system calls table must be 4KB aligned. - */ - .align 12 -ENTRY(compat_sys_call_table) -#include <asm/unistd32.h> diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c index df1cf15377b4..98bbe06e469c 100644 --- a/arch/arm64/kernel/hw_breakpoint.c +++ b/arch/arm64/kernel/hw_breakpoint.c @@ -894,7 +894,7 @@ static struct notifier_block hw_breakpoint_reset_nb = { .notifier_call = hw_breakpoint_reset_notify, }; -#ifdef CONFIG_ARM64_CPU_SUSPEND +#ifdef CONFIG_CPU_PM extern void cpu_suspend_set_dbg_restorer(void (*hw_bp_restore)(void *)); #else static inline void cpu_suspend_set_dbg_restorer(void (*hw_bp_restore)(void *)) diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c index 7e9327a0986d..27d4864577e5 100644 --- a/arch/arm64/kernel/insn.c +++ b/arch/arm64/kernel/insn.c @@ -17,14 +17,19 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/bitops.h> +#include <linux/bug.h> #include <linux/compiler.h> #include <linux/kernel.h> +#include <linux/mm.h> #include <linux/smp.h> +#include <linux/spinlock.h> #include <linux/stop_machine.h> +#include <linux/types.h> #include <linux/uaccess.h> #include <asm/cacheflush.h> #include <asm/debug-monitors.h> +#include <asm/fixmap.h> #include <asm/insn.h> #define AARCH64_INSN_SF_BIT BIT(31) @@ -72,6 +77,29 @@ bool __kprobes aarch64_insn_is_nop(u32 insn) } } +static DEFINE_SPINLOCK(patch_lock); + +static void __kprobes *patch_map(void *addr, int fixmap) +{ + unsigned long uintaddr = (uintptr_t) addr; + bool module = !core_kernel_text(uintaddr); + struct page *page; + + if (module && IS_ENABLED(CONFIG_DEBUG_SET_MODULE_RONX)) + page = vmalloc_to_page(addr); + else + page = virt_to_page(addr); + + BUG_ON(!page); + set_fixmap(fixmap, page_to_phys(page)); + + return (void *) (__fix_to_virt(fixmap) + (uintaddr & ~PAGE_MASK)); +} + +static void __kprobes patch_unmap(int fixmap) +{ + clear_fixmap(fixmap); +} /* * In ARMv8-A, A64 instructions have a fixed length of 32 bits and are always * little-endian. @@ -88,10 +116,27 @@ int __kprobes aarch64_insn_read(void *addr, u32 *insnp) return ret; } +static int __kprobes __aarch64_insn_write(void *addr, u32 insn) +{ + void *waddr = addr; + unsigned long flags = 0; + int ret; + + spin_lock_irqsave(&patch_lock, flags); + waddr = patch_map(addr, FIX_TEXT_POKE0); + + ret = probe_kernel_write(waddr, &insn, AARCH64_INSN_SIZE); + + patch_unmap(FIX_TEXT_POKE0); + spin_unlock_irqrestore(&patch_lock, flags); + + return ret; +} + int __kprobes aarch64_insn_write(void *addr, u32 insn) { insn = cpu_to_le32(insn); - return probe_kernel_write(addr, &insn, AARCH64_INSN_SIZE); + return __aarch64_insn_write(addr, insn); } static bool __kprobes __aarch64_insn_hotpatch_safe(u32 insn) diff --git a/arch/arm64/kernel/psci.c b/arch/arm64/kernel/psci.c index f1dbca7d5c96..3425f311c49e 100644 --- a/arch/arm64/kernel/psci.c +++ b/arch/arm64/kernel/psci.c @@ -540,8 +540,6 @@ const struct cpu_operations cpu_psci_ops = { .name = "psci", #ifdef CONFIG_CPU_IDLE .cpu_init_idle = cpu_psci_cpu_init_idle, -#endif -#ifdef CONFIG_ARM64_CPU_SUSPEND .cpu_suspend = cpu_psci_cpu_suspend, #endif #ifdef CONFIG_SMP diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 20fe2932ad0c..e8420f635bd4 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -40,6 +40,7 @@ #include <linux/fs.h> #include <linux/proc_fs.h> #include <linux/memblock.h> +#include <linux/of_iommu.h> #include <linux/of_fdt.h> #include <linux/of_platform.h> #include <linux/efi.h> @@ -322,25 +323,6 @@ static void __init setup_machine_fdt(phys_addr_t dt_phys) dump_stack_set_arch_desc("%s (DT)", of_flat_dt_get_machine_name()); } -/* - * Limit the memory size that was specified via FDT. - */ -static int __init early_mem(char *p) -{ - phys_addr_t limit; - - if (!p) - return 1; - - limit = memparse(p, &p) & PAGE_MASK; - pr_notice("Memory limited to %lldMB\n", limit >> 20); - - memblock_enforce_memory_limit(limit); - - return 0; -} -early_param("mem", early_mem); - static void __init request_standard_resources(void) { struct memblock_region *region; @@ -401,7 +383,6 @@ void __init setup_arch(char **cmdline_p) paging_init(); request_standard_resources(); - efi_idmap_init(); early_ioremap_reset(); unflatten_device_tree(); @@ -425,6 +406,7 @@ void __init setup_arch(char **cmdline_p) static int __init arm64_device_init(void) { + of_iommu_init(); of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); return 0; } diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c index 5a1ba6e80d4e..e299de396e9b 100644 --- a/arch/arm64/kernel/signal32.c +++ b/arch/arm64/kernel/signal32.c @@ -440,7 +440,7 @@ static void compat_setup_return(struct pt_regs *regs, struct k_sigaction *ka, { compat_ulong_t handler = ptr_to_compat(ka->sa.sa_handler); compat_ulong_t retcode; - compat_ulong_t spsr = regs->pstate & ~PSR_f; + compat_ulong_t spsr = regs->pstate & ~(PSR_f | COMPAT_PSR_E_BIT); int thumb; /* Check if the handler is written for ARM or Thumb */ @@ -454,6 +454,9 @@ static void compat_setup_return(struct pt_regs *regs, struct k_sigaction *ka, /* The IT state must be cleared for both ARM and Thumb-2 */ spsr &= ~COMPAT_PSR_IT_MASK; + /* Restore the original endianness */ + spsr |= COMPAT_PSR_ENDSTATE; + if (ka->sa.sa_flags & SA_RESTORER) { retcode = ptr_to_compat(ka->sa.sa_restorer); } else { @@ -501,7 +504,7 @@ static int compat_setup_sigframe(struct compat_sigframe __user *sf, __put_user_error((compat_ulong_t)0, &sf->uc.uc_mcontext.trap_no, err); /* set the compat FSR WnR */ - __put_user_error(!!(current->thread.fault_code & ESR_EL1_WRITE) << + __put_user_error(!!(current->thread.fault_code & ESR_ELx_WNR) << FSR_WRITE_SHIFT, &sf->uc.uc_mcontext.error_code, err); __put_user_error(current->thread.fault_address, &sf->uc.uc_mcontext.fault_address, err); __put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err); diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 7ae6ee085261..328b8ce4b007 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -65,7 +65,6 @@ struct secondary_data secondary_data; enum ipi_msg_type { IPI_RESCHEDULE, IPI_CALL_FUNC, - IPI_CALL_FUNC_SINGLE, IPI_CPU_STOP, IPI_TIMER, IPI_IRQ_WORK, @@ -483,7 +482,6 @@ static const char *ipi_types[NR_IPI] __tracepoint_string = { #define S(x,s) [x] = s S(IPI_RESCHEDULE, "Rescheduling interrupts"), S(IPI_CALL_FUNC, "Function call interrupts"), - S(IPI_CALL_FUNC_SINGLE, "Single function call interrupts"), S(IPI_CPU_STOP, "CPU stop interrupts"), S(IPI_TIMER, "Timer broadcast interrupts"), S(IPI_IRQ_WORK, "IRQ work interrupts"), @@ -527,7 +525,7 @@ void arch_send_call_function_ipi_mask(const struct cpumask *mask) void arch_send_call_function_single_ipi(int cpu) { - smp_cross_call(cpumask_of(cpu), IPI_CALL_FUNC_SINGLE); + smp_cross_call(cpumask_of(cpu), IPI_CALL_FUNC); } #ifdef CONFIG_IRQ_WORK @@ -585,12 +583,6 @@ void handle_IPI(int ipinr, struct pt_regs *regs) irq_exit(); break; - case IPI_CALL_FUNC_SINGLE: - irq_enter(); - generic_smp_call_function_single_interrupt(); - irq_exit(); - break; - case IPI_CPU_STOP: irq_enter(); ipi_cpu_stop(cpu); diff --git a/arch/arm64/kernel/suspend.c b/arch/arm64/kernel/suspend.c index 2d6b6065fe7f..d7daf45ae7a2 100644 --- a/arch/arm64/kernel/suspend.c +++ b/arch/arm64/kernel/suspend.c @@ -1,7 +1,6 @@ #include <linux/percpu.h> #include <linux/slab.h> #include <asm/cacheflush.h> -#include <asm/cpu_ops.h> #include <asm/debug-monitors.h> #include <asm/pgtable.h> #include <asm/memory.h> @@ -51,26 +50,6 @@ void __init cpu_suspend_set_dbg_restorer(void (*hw_bp_restore)(void *)) hw_breakpoint_restore = hw_bp_restore; } -/** - * cpu_suspend() - function to enter a low-power state - * @arg: argument to pass to CPU suspend operations - * - * Return: 0 on success, -EOPNOTSUPP if CPU suspend hook not initialized, CPU - * operations back-end error code otherwise. - */ -int cpu_suspend(unsigned long arg) -{ - int cpu = smp_processor_id(); - - /* - * If cpu_ops have not been registered or suspend - * has not been initialized, cpu_suspend call fails early. - */ - if (!cpu_ops[cpu] || !cpu_ops[cpu]->cpu_suspend) - return -EOPNOTSUPP; - return cpu_ops[cpu]->cpu_suspend(arg); -} - /* * __cpu_suspend * diff --git a/arch/arm64/kernel/sys.c b/arch/arm64/kernel/sys.c index 3fa98ff14f0e..75151aaf1a52 100644 --- a/arch/arm64/kernel/sys.c +++ b/arch/arm64/kernel/sys.c @@ -39,10 +39,9 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len, /* * Wrappers to pass the pt_regs argument. */ +asmlinkage long sys_rt_sigreturn_wrapper(void); #define sys_rt_sigreturn sys_rt_sigreturn_wrapper -#include <asm/syscalls.h> - #undef __SYSCALL #define __SYSCALL(nr, sym) [nr] = sym, @@ -50,7 +49,7 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len, * The sys_call_table array must be 4K aligned to be accessible from * kernel/entry.S. */ -void *sys_call_table[__NR_syscalls] __aligned(4096) = { +void * const sys_call_table[__NR_syscalls] __aligned(4096) = { [0 ... __NR_syscalls - 1] = sys_ni_syscall, #include <asm/unistd.h> }; diff --git a/arch/arm64/kernel/sys32.c b/arch/arm64/kernel/sys32.c new file mode 100644 index 000000000000..2d5ab3c90b82 --- /dev/null +++ b/arch/arm64/kernel/sys32.c @@ -0,0 +1,51 @@ +/* + * arch/arm64/kernel/sys32.c + * + * Copyright (C) 2015 ARM Ltd. + * + * This program is free software(void); you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http(void);//www.gnu.org/licenses/>. + */ + +/* + * Needed to avoid conflicting __NR_* macros between uapi/asm/unistd.h and + * asm/unistd32.h. + */ +#define __COMPAT_SYSCALL_NR + +#include <linux/compiler.h> +#include <linux/syscalls.h> + +asmlinkage long compat_sys_sigreturn_wrapper(void); +asmlinkage long compat_sys_rt_sigreturn_wrapper(void); +asmlinkage long compat_sys_statfs64_wrapper(void); +asmlinkage long compat_sys_fstatfs64_wrapper(void); +asmlinkage long compat_sys_pread64_wrapper(void); +asmlinkage long compat_sys_pwrite64_wrapper(void); +asmlinkage long compat_sys_truncate64_wrapper(void); +asmlinkage long compat_sys_ftruncate64_wrapper(void); +asmlinkage long compat_sys_readahead_wrapper(void); +asmlinkage long compat_sys_fadvise64_64_wrapper(void); +asmlinkage long compat_sys_sync_file_range2_wrapper(void); +asmlinkage long compat_sys_fallocate_wrapper(void); + +#undef __SYSCALL +#define __SYSCALL(nr, sym) [nr] = sym, + +/* + * The sys_call_table array must be 4K aligned to be accessible from + * kernel/entry.S. + */ +void * const compat_sys_call_table[__NR_compat_syscalls] __aligned(4096) = { + [0 ... __NR_compat_syscalls - 1] = sys_ni_syscall, +#include <asm/unistd32.h> +}; diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 0a801e3743d5..1ef2940df13c 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -33,6 +33,7 @@ #include <asm/atomic.h> #include <asm/debug-monitors.h> +#include <asm/esr.h> #include <asm/traps.h> #include <asm/stacktrace.h> #include <asm/exception.h> @@ -373,6 +374,51 @@ asmlinkage long do_ni_syscall(struct pt_regs *regs) return sys_ni_syscall(); } +static const char *esr_class_str[] = { + [0 ... ESR_ELx_EC_MAX] = "UNRECOGNIZED EC", + [ESR_ELx_EC_UNKNOWN] = "Unknown/Uncategorized", + [ESR_ELx_EC_WFx] = "WFI/WFE", + [ESR_ELx_EC_CP15_32] = "CP15 MCR/MRC", + [ESR_ELx_EC_CP15_64] = "CP15 MCRR/MRRC", + [ESR_ELx_EC_CP14_MR] = "CP14 MCR/MRC", + [ESR_ELx_EC_CP14_LS] = "CP14 LDC/STC", + [ESR_ELx_EC_FP_ASIMD] = "ASIMD", + [ESR_ELx_EC_CP10_ID] = "CP10 MRC/VMRS", + [ESR_ELx_EC_CP14_64] = "CP14 MCRR/MRRC", + [ESR_ELx_EC_ILL] = "PSTATE.IL", + [ESR_ELx_EC_SVC32] = "SVC (AArch32)", + [ESR_ELx_EC_HVC32] = "HVC (AArch32)", + [ESR_ELx_EC_SMC32] = "SMC (AArch32)", + [ESR_ELx_EC_SVC64] = "SVC (AArch64)", + [ESR_ELx_EC_HVC64] = "HVC (AArch64)", + [ESR_ELx_EC_SMC64] = "SMC (AArch64)", + [ESR_ELx_EC_SYS64] = "MSR/MRS (AArch64)", + [ESR_ELx_EC_IMP_DEF] = "EL3 IMP DEF", + [ESR_ELx_EC_IABT_LOW] = "IABT (lower EL)", + [ESR_ELx_EC_IABT_CUR] = "IABT (current EL)", + [ESR_ELx_EC_PC_ALIGN] = "PC Alignment", + [ESR_ELx_EC_DABT_LOW] = "DABT (lower EL)", + [ESR_ELx_EC_DABT_CUR] = "DABT (current EL)", + [ESR_ELx_EC_SP_ALIGN] = "SP Alignment", + [ESR_ELx_EC_FP_EXC32] = "FP (AArch32)", + [ESR_ELx_EC_FP_EXC64] = "FP (AArch64)", + [ESR_ELx_EC_SERROR] = "SError", + [ESR_ELx_EC_BREAKPT_LOW] = "Breakpoint (lower EL)", + [ESR_ELx_EC_BREAKPT_CUR] = "Breakpoint (current EL)", + [ESR_ELx_EC_SOFTSTP_LOW] = "Software Step (lower EL)", + [ESR_ELx_EC_SOFTSTP_CUR] = "Software Step (current EL)", + [ESR_ELx_EC_WATCHPT_LOW] = "Watchpoint (lower EL)", + [ESR_ELx_EC_WATCHPT_CUR] = "Watchpoint (current EL)", + [ESR_ELx_EC_BKPT32] = "BKPT (AArch32)", + [ESR_ELx_EC_VECTOR32] = "Vector catch (AArch32)", + [ESR_ELx_EC_BRK64] = "BRK (AArch64)", +}; + +const char *esr_get_class_string(u32 esr) +{ + return esr_class_str[esr >> ESR_ELx_EC_SHIFT]; +} + /* * bad_mode handles the impossible case in the exception vector. */ @@ -382,8 +428,8 @@ asmlinkage void bad_mode(struct pt_regs *regs, int reason, unsigned int esr) void __user *pc = (void __user *)instruction_pointer(regs); console_verbose(); - pr_crit("Bad mode in %s handler detected, code 0x%08x\n", - handler[reason], esr); + pr_crit("Bad mode in %s handler detected, code 0x%08x -- %s\n", + handler[reason], esr, esr_get_class_string(esr)); __show_regs(regs); info.si_signo = SIGILL; diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index 9965ec87cbec..5d9d2dca530d 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -8,6 +8,7 @@ #include <asm/thread_info.h> #include <asm/memory.h> #include <asm/page.h> +#include <asm/pgtable.h> #include "image.h" @@ -49,6 +50,14 @@ PECOFF_FILE_ALIGNMENT = 0x200; #define PECOFF_EDATA_PADDING #endif +#ifdef CONFIG_DEBUG_ALIGN_RODATA +#define ALIGN_DEBUG_RO . = ALIGN(1<<SECTION_SHIFT); +#define ALIGN_DEBUG_RO_MIN(min) ALIGN_DEBUG_RO +#else +#define ALIGN_DEBUG_RO +#define ALIGN_DEBUG_RO_MIN(min) . = ALIGN(min); +#endif + SECTIONS { /* @@ -71,6 +80,7 @@ SECTIONS _text = .; HEAD_TEXT } + ALIGN_DEBUG_RO .text : { /* Real text segment */ _stext = .; /* Text and read-only data */ __exception_text_start = .; @@ -87,19 +97,22 @@ SECTIONS *(.got) /* Global offset table */ } + ALIGN_DEBUG_RO RO_DATA(PAGE_SIZE) EXCEPTION_TABLE(8) NOTES + ALIGN_DEBUG_RO _etext = .; /* End of text and rodata section */ - . = ALIGN(PAGE_SIZE); + ALIGN_DEBUG_RO_MIN(PAGE_SIZE) __init_begin = .; INIT_TEXT_SECTION(8) .exit.text : { ARM_EXIT_KEEP(EXIT_TEXT) } - . = ALIGN(16); + + ALIGN_DEBUG_RO_MIN(16) .init.data : { INIT_DATA INIT_SETUP(16) diff --git a/arch/arm64/kvm/emulate.c b/arch/arm64/kvm/emulate.c index 124418d17049..f87d8fbaa48d 100644 --- a/arch/arm64/kvm/emulate.c +++ b/arch/arm64/kvm/emulate.c @@ -22,6 +22,7 @@ */ #include <linux/kvm_host.h> +#include <asm/esr.h> #include <asm/kvm_emulate.h> /* @@ -55,8 +56,8 @@ static int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu) { u32 esr = kvm_vcpu_get_hsr(vcpu); - if (esr & ESR_EL2_CV) - return (esr & ESR_EL2_COND) >> ESR_EL2_COND_SHIFT; + if (esr & ESR_ELx_CV) + return (esr & ESR_ELx_COND_MASK) >> ESR_ELx_COND_SHIFT; return -1; } diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c index 34b8bd0711e9..29b184a8f3f8 100644 --- a/arch/arm64/kvm/handle_exit.c +++ b/arch/arm64/kvm/handle_exit.c @@ -21,8 +21,10 @@ #include <linux/kvm.h> #include <linux/kvm_host.h> -#include <asm/kvm_emulate.h> + +#include <asm/esr.h> #include <asm/kvm_coproc.h> +#include <asm/kvm_emulate.h> #include <asm/kvm_mmu.h> #include <asm/kvm_psci.h> @@ -61,7 +63,7 @@ static int handle_smc(struct kvm_vcpu *vcpu, struct kvm_run *run) */ static int kvm_handle_wfx(struct kvm_vcpu *vcpu, struct kvm_run *run) { - if (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EC_WFI_ISS_WFE) + if (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WFx_ISS_WFE) kvm_vcpu_on_spin(vcpu); else kvm_vcpu_block(vcpu); @@ -72,29 +74,30 @@ static int kvm_handle_wfx(struct kvm_vcpu *vcpu, struct kvm_run *run) } static exit_handle_fn arm_exit_handlers[] = { - [ESR_EL2_EC_WFI] = kvm_handle_wfx, - [ESR_EL2_EC_CP15_32] = kvm_handle_cp15_32, - [ESR_EL2_EC_CP15_64] = kvm_handle_cp15_64, - [ESR_EL2_EC_CP14_MR] = kvm_handle_cp14_32, - [ESR_EL2_EC_CP14_LS] = kvm_handle_cp14_load_store, - [ESR_EL2_EC_CP14_64] = kvm_handle_cp14_64, - [ESR_EL2_EC_HVC32] = handle_hvc, - [ESR_EL2_EC_SMC32] = handle_smc, - [ESR_EL2_EC_HVC64] = handle_hvc, - [ESR_EL2_EC_SMC64] = handle_smc, - [ESR_EL2_EC_SYS64] = kvm_handle_sys_reg, - [ESR_EL2_EC_IABT] = kvm_handle_guest_abort, - [ESR_EL2_EC_DABT] = kvm_handle_guest_abort, + [ESR_ELx_EC_WFx] = kvm_handle_wfx, + [ESR_ELx_EC_CP15_32] = kvm_handle_cp15_32, + [ESR_ELx_EC_CP15_64] = kvm_handle_cp15_64, + [ESR_ELx_EC_CP14_MR] = kvm_handle_cp14_32, + [ESR_ELx_EC_CP14_LS] = kvm_handle_cp14_load_store, + [ESR_ELx_EC_CP14_64] = kvm_handle_cp14_64, + [ESR_ELx_EC_HVC32] = handle_hvc, + [ESR_ELx_EC_SMC32] = handle_smc, + [ESR_ELx_EC_HVC64] = handle_hvc, + [ESR_ELx_EC_SMC64] = handle_smc, + [ESR_ELx_EC_SYS64] = kvm_handle_sys_reg, + [ESR_ELx_EC_IABT_LOW] = kvm_handle_guest_abort, + [ESR_ELx_EC_DABT_LOW] = kvm_handle_guest_abort, }; static exit_handle_fn kvm_get_exit_handler(struct kvm_vcpu *vcpu) { - u8 hsr_ec = kvm_vcpu_trap_get_class(vcpu); + u32 hsr = kvm_vcpu_get_hsr(vcpu); + u8 hsr_ec = hsr >> ESR_ELx_EC_SHIFT; if (hsr_ec >= ARRAY_SIZE(arm_exit_handlers) || !arm_exit_handlers[hsr_ec]) { - kvm_err("Unknown exception class: hsr: %#08x\n", - (unsigned int)kvm_vcpu_get_hsr(vcpu)); + kvm_err("Unknown exception class: hsr: %#08x -- %s\n", + hsr, esr_get_class_string(hsr)); BUG(); } diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S index c3ca89c27c6b..9bff671cc561 100644 --- a/arch/arm64/kvm/hyp.S +++ b/arch/arm64/kvm/hyp.S @@ -17,15 +17,16 @@ #include <linux/linkage.h> -#include <asm/assembler.h> -#include <asm/memory.h> #include <asm/asm-offsets.h> +#include <asm/assembler.h> #include <asm/debug-monitors.h> +#include <asm/esr.h> #include <asm/fpsimdmacros.h> #include <asm/kvm.h> -#include <asm/kvm_asm.h> #include <asm/kvm_arm.h> +#include <asm/kvm_asm.h> #include <asm/kvm_mmu.h> +#include <asm/memory.h> #define CPU_GP_REG_OFFSET(x) (CPU_GP_REGS + x) #define CPU_XREG_OFFSET(x) CPU_GP_REG_OFFSET(CPU_USER_PT_REGS + 8*x) @@ -1141,9 +1142,9 @@ el1_sync: // Guest trapped into EL2 push x2, x3 mrs x1, esr_el2 - lsr x2, x1, #ESR_EL2_EC_SHIFT + lsr x2, x1, #ESR_ELx_EC_SHIFT - cmp x2, #ESR_EL2_EC_HVC64 + cmp x2, #ESR_ELx_EC_HVC64 b.ne el1_trap mrs x3, vttbr_el2 // If vttbr is valid, the 64bit guest @@ -1178,13 +1179,13 @@ el1_trap: * x1: ESR * x2: ESR_EC */ - cmp x2, #ESR_EL2_EC_DABT - mov x0, #ESR_EL2_EC_IABT + cmp x2, #ESR_ELx_EC_DABT_LOW + mov x0, #ESR_ELx_EC_IABT_LOW ccmp x2, x0, #4, ne b.ne 1f // Not an abort we care about /* This is an abort. Check for permission fault */ - and x2, x1, #ESR_EL2_FSC_TYPE + and x2, x1, #ESR_ELx_FSC_TYPE cmp x2, #FSC_PERM b.ne 1f // Not a permission fault diff --git a/arch/arm64/kvm/inject_fault.c b/arch/arm64/kvm/inject_fault.c index 81a02a8762b0..f02530e726f6 100644 --- a/arch/arm64/kvm/inject_fault.c +++ b/arch/arm64/kvm/inject_fault.c @@ -118,27 +118,27 @@ static void inject_abt64(struct kvm_vcpu *vcpu, bool is_iabt, unsigned long addr * instruction set. Report an external synchronous abort. */ if (kvm_vcpu_trap_il_is32bit(vcpu)) - esr |= ESR_EL1_IL; + esr |= ESR_ELx_IL; /* * Here, the guest runs in AArch64 mode when in EL1. If we get * an AArch32 fault, it means we managed to trap an EL0 fault. */ if (is_aarch32 || (cpsr & PSR_MODE_MASK) == PSR_MODE_EL0t) - esr |= (ESR_EL1_EC_IABT_EL0 << ESR_EL1_EC_SHIFT); + esr |= (ESR_ELx_EC_IABT_LOW << ESR_ELx_EC_SHIFT); else - esr |= (ESR_EL1_EC_IABT_EL1 << ESR_EL1_EC_SHIFT); + esr |= (ESR_ELx_EC_IABT_CUR << ESR_ELx_EC_SHIFT); if (!is_iabt) - esr |= ESR_EL1_EC_DABT_EL0; + esr |= ESR_ELx_EC_DABT_LOW; - vcpu_sys_reg(vcpu, ESR_EL1) = esr | ESR_EL2_EC_xABT_xFSR_EXTABT; + vcpu_sys_reg(vcpu, ESR_EL1) = esr | ESR_ELx_FSC_EXTABT; } static void inject_undef64(struct kvm_vcpu *vcpu) { unsigned long cpsr = *vcpu_cpsr(vcpu); - u32 esr = (ESR_EL1_EC_UNKNOWN << ESR_EL1_EC_SHIFT); + u32 esr = (ESR_ELx_EC_UNKNOWN << ESR_ELx_EC_SHIFT); *vcpu_spsr(vcpu) = cpsr; *vcpu_elr_el1(vcpu) = *vcpu_pc(vcpu); @@ -151,7 +151,7 @@ static void inject_undef64(struct kvm_vcpu *vcpu) * set. */ if (kvm_vcpu_trap_il_is32bit(vcpu)) - esr |= ESR_EL1_IL; + esr |= ESR_ELx_IL; vcpu_sys_reg(vcpu, ESR_EL1) = esr; } diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index f31e8bb2bc5b..b96afdf6cee4 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -20,17 +20,20 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ -#include <linux/mm.h> #include <linux/kvm_host.h> +#include <linux/mm.h> #include <linux/uaccess.h> -#include <asm/kvm_arm.h> -#include <asm/kvm_host.h> -#include <asm/kvm_emulate.h> -#include <asm/kvm_coproc.h> -#include <asm/kvm_mmu.h> + #include <asm/cacheflush.h> #include <asm/cputype.h> #include <asm/debug-monitors.h> +#include <asm/esr.h> +#include <asm/kvm_arm.h> +#include <asm/kvm_coproc.h> +#include <asm/kvm_emulate.h> +#include <asm/kvm_host.h> +#include <asm/kvm_mmu.h> + #include <trace/events/kvm.h> #include "sys_regs.h" @@ -760,12 +763,12 @@ static void unhandled_cp_access(struct kvm_vcpu *vcpu, int cp; switch(hsr_ec) { - case ESR_EL2_EC_CP15_32: - case ESR_EL2_EC_CP15_64: + case ESR_ELx_EC_CP15_32: + case ESR_ELx_EC_CP15_64: cp = 15; break; - case ESR_EL2_EC_CP14_MR: - case ESR_EL2_EC_CP14_64: + case ESR_ELx_EC_CP14_MR: + case ESR_ELx_EC_CP14_64: cp = 14; break; default: diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index d92094203913..0a24b9b8c698 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -134,16 +134,17 @@ static void __dma_free_coherent(struct device *dev, size_t size, swiotlb_free_coherent(dev, size, vaddr, dma_handle); } -static void *__dma_alloc_noncoherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flags, - struct dma_attrs *attrs) +static void *__dma_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t flags, + struct dma_attrs *attrs) { struct page *page; void *ptr, *coherent_ptr; + bool coherent = is_device_dma_coherent(dev); size = PAGE_ALIGN(size); - if (!(flags & __GFP_WAIT)) { + if (!coherent && !(flags & __GFP_WAIT)) { struct page *page = NULL; void *addr = __alloc_from_pool(size, &page); @@ -151,13 +152,16 @@ static void *__dma_alloc_noncoherent(struct device *dev, size_t size, *dma_handle = phys_to_dma(dev, page_to_phys(page)); return addr; - } ptr = __dma_alloc_coherent(dev, size, dma_handle, flags, attrs); if (!ptr) goto no_mem; + /* no need for non-cacheable mapping if coherent */ + if (coherent) + return ptr; + /* remove any dirty cache lines on the kernel alias */ __dma_flush_range(ptr, ptr + size); @@ -179,15 +183,17 @@ no_mem: return NULL; } -static void __dma_free_noncoherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle, - struct dma_attrs *attrs) +static void __dma_free(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle, + struct dma_attrs *attrs) { void *swiotlb_addr = phys_to_virt(dma_to_phys(dev, dma_handle)); - if (__free_from_pool(vaddr, size)) - return; - vunmap(vaddr); + if (!is_device_dma_coherent(dev)) { + if (__free_from_pool(vaddr, size)) + return; + vunmap(vaddr); + } __dma_free_coherent(dev, size, swiotlb_addr, dma_handle, attrs); } @@ -199,7 +205,8 @@ static dma_addr_t __swiotlb_map_page(struct device *dev, struct page *page, dma_addr_t dev_addr; dev_addr = swiotlb_map_page(dev, page, offset, size, dir, attrs); - __dma_map_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir); + if (!is_device_dma_coherent(dev)) + __dma_map_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir); return dev_addr; } @@ -209,7 +216,8 @@ static void __swiotlb_unmap_page(struct device *dev, dma_addr_t dev_addr, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) { - __dma_unmap_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir); + if (!is_device_dma_coherent(dev)) + __dma_unmap_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir); swiotlb_unmap_page(dev, dev_addr, size, dir, attrs); } @@ -221,9 +229,10 @@ static int __swiotlb_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int i, ret; ret = swiotlb_map_sg_attrs(dev, sgl, nelems, dir, attrs); - for_each_sg(sgl, sg, ret, i) - __dma_map_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)), - sg->length, dir); + if (!is_device_dma_coherent(dev)) + for_each_sg(sgl, sg, ret, i) + __dma_map_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)), + sg->length, dir); return ret; } @@ -236,9 +245,10 @@ static void __swiotlb_unmap_sg_attrs(struct device *dev, struct scatterlist *sg; int i; - for_each_sg(sgl, sg, nelems, i) - __dma_unmap_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)), - sg->length, dir); + if (!is_device_dma_coherent(dev)) + for_each_sg(sgl, sg, nelems, i) + __dma_unmap_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)), + sg->length, dir); swiotlb_unmap_sg_attrs(dev, sgl, nelems, dir, attrs); } @@ -246,7 +256,8 @@ static void __swiotlb_sync_single_for_cpu(struct device *dev, dma_addr_t dev_addr, size_t size, enum dma_data_direction dir) { - __dma_unmap_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir); + if (!is_device_dma_coherent(dev)) + __dma_unmap_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir); swiotlb_sync_single_for_cpu(dev, dev_addr, size, dir); } @@ -255,7 +266,8 @@ static void __swiotlb_sync_single_for_device(struct device *dev, enum dma_data_direction dir) { swiotlb_sync_single_for_device(dev, dev_addr, size, dir); - __dma_map_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir); + if (!is_device_dma_coherent(dev)) + __dma_map_area(phys_to_virt(dma_to_phys(dev, dev_addr)), size, dir); } static void __swiotlb_sync_sg_for_cpu(struct device *dev, @@ -265,9 +277,10 @@ static void __swiotlb_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg; int i; - for_each_sg(sgl, sg, nelems, i) - __dma_unmap_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)), - sg->length, dir); + if (!is_device_dma_coherent(dev)) + for_each_sg(sgl, sg, nelems, i) + __dma_unmap_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)), + sg->length, dir); swiotlb_sync_sg_for_cpu(dev, sgl, nelems, dir); } @@ -279,9 +292,10 @@ static void __swiotlb_sync_sg_for_device(struct device *dev, int i; swiotlb_sync_sg_for_device(dev, sgl, nelems, dir); - for_each_sg(sgl, sg, nelems, i) - __dma_map_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)), - sg->length, dir); + if (!is_device_dma_coherent(dev)) + for_each_sg(sgl, sg, nelems, i) + __dma_map_area(phys_to_virt(dma_to_phys(dev, sg->dma_address)), + sg->length, dir); } /* vma->vm_page_prot must be set appropriately before calling this function */ @@ -308,28 +322,20 @@ static int __dma_common_mmap(struct device *dev, struct vm_area_struct *vma, return ret; } -static int __swiotlb_mmap_noncoherent(struct device *dev, - struct vm_area_struct *vma, - void *cpu_addr, dma_addr_t dma_addr, size_t size, - struct dma_attrs *attrs) -{ - vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot, false); - return __dma_common_mmap(dev, vma, cpu_addr, dma_addr, size); -} - -static int __swiotlb_mmap_coherent(struct device *dev, - struct vm_area_struct *vma, - void *cpu_addr, dma_addr_t dma_addr, size_t size, - struct dma_attrs *attrs) +static int __swiotlb_mmap(struct device *dev, + struct vm_area_struct *vma, + void *cpu_addr, dma_addr_t dma_addr, size_t size, + struct dma_attrs *attrs) { - /* Just use whatever page_prot attributes were specified */ + vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot, + is_device_dma_coherent(dev)); return __dma_common_mmap(dev, vma, cpu_addr, dma_addr, size); } -struct dma_map_ops noncoherent_swiotlb_dma_ops = { - .alloc = __dma_alloc_noncoherent, - .free = __dma_free_noncoherent, - .mmap = __swiotlb_mmap_noncoherent, +static struct dma_map_ops swiotlb_dma_ops = { + .alloc = __dma_alloc, + .free = __dma_free, + .mmap = __swiotlb_mmap, .map_page = __swiotlb_map_page, .unmap_page = __swiotlb_unmap_page, .map_sg = __swiotlb_map_sg_attrs, @@ -341,24 +347,6 @@ struct dma_map_ops noncoherent_swiotlb_dma_ops = { .dma_supported = swiotlb_dma_supported, .mapping_error = swiotlb_dma_mapping_error, }; -EXPORT_SYMBOL(noncoherent_swiotlb_dma_ops); - -struct dma_map_ops coherent_swiotlb_dma_ops = { - .alloc = __dma_alloc_coherent, - .free = __dma_free_coherent, - .mmap = __swiotlb_mmap_coherent, - .map_page = swiotlb_map_page, - .unmap_page = swiotlb_unmap_page, - .map_sg = swiotlb_map_sg_attrs, - .unmap_sg = swiotlb_unmap_sg_attrs, - .sync_single_for_cpu = swiotlb_sync_single_for_cpu, - .sync_single_for_device = swiotlb_sync_single_for_device, - .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, - .sync_sg_for_device = swiotlb_sync_sg_for_device, - .dma_supported = swiotlb_dma_supported, - .mapping_error = swiotlb_dma_mapping_error, -}; -EXPORT_SYMBOL(coherent_swiotlb_dma_ops); extern int swiotlb_late_init_with_default_size(size_t default_size); @@ -427,7 +415,7 @@ static int __init swiotlb_late_init(void) { size_t swiotlb_size = min(SZ_64M, MAX_ORDER_NR_PAGES << PAGE_SHIFT); - dma_ops = &noncoherent_swiotlb_dma_ops; + dma_ops = &swiotlb_dma_ops; return swiotlb_late_init_with_default_size(swiotlb_size); } diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c index d54dc9ac4b70..74c256744b25 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -14,14 +14,18 @@ * of the License. */ #include <linux/debugfs.h> +#include <linux/errno.h> #include <linux/fs.h> #include <linux/io.h> +#include <linux/init.h> #include <linux/mm.h> #include <linux/sched.h> #include <linux/seq_file.h> #include <asm/fixmap.h> +#include <asm/memory.h> #include <asm/pgtable.h> +#include <asm/pgtable-hwdef.h> #define LOWEST_ADDR (UL(0xffffffffffffffff) << VA_BITS) @@ -37,10 +41,10 @@ enum address_markers_idx { VMEMMAP_START_NR, VMEMMAP_END_NR, #endif - PCI_START_NR, - PCI_END_NR, FIXADDR_START_NR, FIXADDR_END_NR, + PCI_START_NR, + PCI_END_NR, MODULES_START_NR, MODUELS_END_NR, KERNEL_SPACE_NR, @@ -53,10 +57,10 @@ static struct addr_marker address_markers[] = { { 0, "vmemmap start" }, { 0, "vmemmap end" }, #endif - { (unsigned long) PCI_IOBASE, "PCI I/O start" }, - { (unsigned long) PCI_IOBASE + SZ_16M, "PCI I/O end" }, { FIXADDR_START, "Fixmap start" }, { FIXADDR_TOP, "Fixmap end" }, + { PCI_IO_START, "PCI I/O start" }, + { PCI_IO_END, "PCI I/O end" }, { MODULES_VADDR, "Modules start" }, { MODULES_END, "Modules end" }, { PAGE_OFFSET, "Kernel Mapping" }, @@ -246,10 +250,12 @@ static void walk_pmd(struct pg_state *st, pud_t *pud, unsigned long start) for (i = 0; i < PTRS_PER_PMD; i++, pmd++) { addr = start + i * PMD_SIZE; - if (pmd_none(*pmd) || pmd_sect(*pmd) || pmd_bad(*pmd)) + if (pmd_none(*pmd) || pmd_sect(*pmd)) { note_page(st, addr, 3, pmd_val(*pmd)); - else + } else { + BUG_ON(pmd_bad(*pmd)); walk_pte(st, pmd, addr); + } } } @@ -261,10 +267,12 @@ static void walk_pud(struct pg_state *st, pgd_t *pgd, unsigned long start) for (i = 0; i < PTRS_PER_PUD; i++, pud++) { addr = start + i * PUD_SIZE; - if (pud_none(*pud) || pud_sect(*pud) || pud_bad(*pud)) + if (pud_none(*pud) || pud_sect(*pud)) { note_page(st, addr, 2, pud_val(*pud)); - else + } else { + BUG_ON(pud_bad(*pud)); walk_pmd(st, pud, addr); + } } } @@ -276,10 +284,12 @@ static void walk_pgd(struct pg_state *st, struct mm_struct *mm, unsigned long st for (i = 0; i < PTRS_PER_PGD; i++, pgd++) { addr = start + i * PGDIR_SIZE; - if (pgd_none(*pgd) || pgd_bad(*pgd)) + if (pgd_none(*pgd)) { note_page(st, addr, 1, pgd_val(*pgd)); - else + } else { + BUG_ON(pgd_bad(*pgd)); walk_pud(st, pgd, addr); + } } } diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index c11cd27ca8f5..96da13167d4a 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -219,7 +219,7 @@ static int __kprobes do_page_fault(unsigned long addr, unsigned int esr, if (esr & ESR_LNX_EXEC) { vm_flags = VM_EXEC; - } else if ((esr & ESR_EL1_WRITE) && !(esr & ESR_EL1_CM)) { + } else if ((esr & ESR_ELx_WNR) && !(esr & ESR_ELx_CM)) { vm_flags = VM_WRITE; mm_flags |= FAULT_FLAG_WRITE; } diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index c95464a33f36..71145f952070 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -35,6 +35,7 @@ #include <linux/efi.h> #include <asm/fixmap.h> +#include <asm/memory.h> #include <asm/sections.h> #include <asm/setup.h> #include <asm/sizes.h> @@ -136,10 +137,29 @@ static void arm64_memory_present(void) } #endif +static phys_addr_t memory_limit = (phys_addr_t)ULLONG_MAX; + +/* + * Limit the memory size that was specified via FDT. + */ +static int __init early_mem(char *p) +{ + if (!p) + return 1; + + memory_limit = memparse(p, &p) & PAGE_MASK; + pr_notice("Memory limited to %lldMB\n", memory_limit >> 20); + + return 0; +} +early_param("mem", early_mem); + void __init arm64_memblock_init(void) { phys_addr_t dma_phys_limit = 0; + memblock_enforce_memory_limit(memory_limit); + /* * Register the kernel text, kernel data, initrd, and initial * pagetables with memblock. @@ -277,8 +297,8 @@ void __init mem_init(void) " vmemmap : 0x%16lx - 0x%16lx (%6ld GB maximum)\n" " 0x%16lx - 0x%16lx (%6ld MB actual)\n" #endif - " PCI I/O : 0x%16lx - 0x%16lx (%6ld MB)\n" " fixed : 0x%16lx - 0x%16lx (%6ld KB)\n" + " PCI I/O : 0x%16lx - 0x%16lx (%6ld MB)\n" " modules : 0x%16lx - 0x%16lx (%6ld MB)\n" " memory : 0x%16lx - 0x%16lx (%6ld MB)\n" " .init : 0x%p" " - 0x%p" " (%6ld KB)\n" @@ -291,8 +311,8 @@ void __init mem_init(void) MLM((unsigned long)virt_to_page(PAGE_OFFSET), (unsigned long)virt_to_page(high_memory)), #endif - MLM((unsigned long)PCI_IOBASE, (unsigned long)PCI_IOBASE + SZ_16M), MLK(FIXADDR_START, FIXADDR_TOP), + MLM(PCI_IO_START, PCI_IO_END), MLM(MODULES_VADDR, MODULES_END), MLM(PAGE_OFFSET, (unsigned long)high_memory), MLK_ROUNDUP(__init_begin, __init_end), @@ -325,6 +345,7 @@ void __init mem_init(void) void free_initmem(void) { + fixup_init(); free_initmem_default(0); free_alternatives_memory(); } diff --git a/arch/arm64/mm/ioremap.c b/arch/arm64/mm/ioremap.c index cbb99c8f1e04..01e88c8bcab0 100644 --- a/arch/arm64/mm/ioremap.c +++ b/arch/arm64/mm/ioremap.c @@ -62,6 +62,7 @@ static void __iomem *__ioremap_caller(phys_addr_t phys_addr, size_t size, if (!area) return NULL; addr = (unsigned long)area->addr; + area->phys_addr = phys_addr; err = ioremap_page_range(addr, addr + size, phys_addr, prot); if (err) { diff --git a/arch/arm64/mm/mm.h b/arch/arm64/mm/mm.h index 50c3351df9c7..ef47d99b5cbc 100644 --- a/arch/arm64/mm/mm.h +++ b/arch/arm64/mm/mm.h @@ -1 +1,3 @@ extern void __init bootmem_init(void); + +void fixup_init(void); diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 6032f3e3056a..c6daaf6c6f97 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -26,6 +26,8 @@ #include <linux/memblock.h> #include <linux/fs.h> #include <linux/io.h> +#include <linux/slab.h> +#include <linux/stop_machine.h> #include <asm/cputype.h> #include <asm/fixmap.h> @@ -45,80 +47,6 @@ struct page *empty_zero_page; EXPORT_SYMBOL(empty_zero_page); -struct cachepolicy { - const char policy[16]; - u64 mair; - u64 tcr; -}; - -static struct cachepolicy cache_policies[] __initdata = { - { - .policy = "uncached", - .mair = 0x44, /* inner, outer non-cacheable */ - .tcr = TCR_IRGN_NC | TCR_ORGN_NC, - }, { - .policy = "writethrough", - .mair = 0xaa, /* inner, outer write-through, read-allocate */ - .tcr = TCR_IRGN_WT | TCR_ORGN_WT, - }, { - .policy = "writeback", - .mair = 0xee, /* inner, outer write-back, read-allocate */ - .tcr = TCR_IRGN_WBnWA | TCR_ORGN_WBnWA, - } -}; - -/* - * These are useful for identifying cache coherency problems by allowing the - * cache or the cache and writebuffer to be turned off. It changes the Normal - * memory caching attributes in the MAIR_EL1 register. - */ -static int __init early_cachepolicy(char *p) -{ - int i; - u64 tmp; - - for (i = 0; i < ARRAY_SIZE(cache_policies); i++) { - int len = strlen(cache_policies[i].policy); - - if (memcmp(p, cache_policies[i].policy, len) == 0) - break; - } - if (i == ARRAY_SIZE(cache_policies)) { - pr_err("ERROR: unknown or unsupported cache policy: %s\n", p); - return 0; - } - - flush_cache_all(); - - /* - * Modify MT_NORMAL attributes in MAIR_EL1. - */ - asm volatile( - " mrs %0, mair_el1\n" - " bfi %0, %1, %2, #8\n" - " msr mair_el1, %0\n" - " isb\n" - : "=&r" (tmp) - : "r" (cache_policies[i].mair), "i" (MT_NORMAL * 8)); - - /* - * Modify TCR PTW cacheability attributes. - */ - asm volatile( - " mrs %0, tcr_el1\n" - " bic %0, %0, %2\n" - " orr %0, %0, %1\n" - " msr tcr_el1, %0\n" - " isb\n" - : "=&r" (tmp) - : "r" (cache_policies[i].tcr), "r" (TCR_IRGN_MASK | TCR_ORGN_MASK)); - - flush_cache_all(); - - return 0; -} -early_param("cachepolicy", early_cachepolicy); - pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, pgprot_t vma_prot) { @@ -133,19 +61,42 @@ EXPORT_SYMBOL(phys_mem_access_prot); static void __init *early_alloc(unsigned long sz) { void *ptr = __va(memblock_alloc(sz, sz)); + BUG_ON(!ptr); memset(ptr, 0, sz); return ptr; } -static void __init alloc_init_pte(pmd_t *pmd, unsigned long addr, +/* + * remap a PMD into pages + */ +static void split_pmd(pmd_t *pmd, pte_t *pte) +{ + unsigned long pfn = pmd_pfn(*pmd); + int i = 0; + + do { + /* + * Need to have the least restrictive permissions available + * permissions will be fixed up later + */ + set_pte(pte, pfn_pte(pfn, PAGE_KERNEL_EXEC)); + pfn++; + } while (pte++, i++, i < PTRS_PER_PTE); +} + +static void alloc_init_pte(pmd_t *pmd, unsigned long addr, unsigned long end, unsigned long pfn, - pgprot_t prot) + pgprot_t prot, + void *(*alloc)(unsigned long size)) { pte_t *pte; - if (pmd_none(*pmd)) { - pte = early_alloc(PTRS_PER_PTE * sizeof(pte_t)); + if (pmd_none(*pmd) || pmd_sect(*pmd)) { + pte = alloc(PTRS_PER_PTE * sizeof(pte_t)); + if (pmd_sect(*pmd)) + split_pmd(pmd, pte); __pmd_populate(pmd, __pa(pte), PMD_TYPE_TABLE); + flush_tlb_all(); } BUG_ON(pmd_bad(*pmd)); @@ -156,30 +107,42 @@ static void __init alloc_init_pte(pmd_t *pmd, unsigned long addr, } while (pte++, addr += PAGE_SIZE, addr != end); } -static void __init alloc_init_pmd(pud_t *pud, unsigned long addr, - unsigned long end, phys_addr_t phys, - int map_io) +void split_pud(pud_t *old_pud, pmd_t *pmd) +{ + unsigned long addr = pud_pfn(*old_pud) << PAGE_SHIFT; + pgprot_t prot = __pgprot(pud_val(*old_pud) ^ addr); + int i = 0; + + do { + set_pmd(pmd, __pmd(addr | prot)); + addr += PMD_SIZE; + } while (pmd++, i++, i < PTRS_PER_PMD); +} + +static void alloc_init_pmd(struct mm_struct *mm, pud_t *pud, + unsigned long addr, unsigned long end, + phys_addr_t phys, pgprot_t prot, + void *(*alloc)(unsigned long size)) { pmd_t *pmd; unsigned long next; - pmdval_t prot_sect; - pgprot_t prot_pte; - - if (map_io) { - prot_sect = PROT_SECT_DEVICE_nGnRE; - prot_pte = __pgprot(PROT_DEVICE_nGnRE); - } else { - prot_sect = PROT_SECT_NORMAL_EXEC; - prot_pte = PAGE_KERNEL_EXEC; - } /* * Check for initial section mappings in the pgd/pud and remove them. */ - if (pud_none(*pud) || pud_bad(*pud)) { - pmd = early_alloc(PTRS_PER_PMD * sizeof(pmd_t)); - pud_populate(&init_mm, pud, pmd); + if (pud_none(*pud) || pud_sect(*pud)) { + pmd = alloc(PTRS_PER_PMD * sizeof(pmd_t)); + if (pud_sect(*pud)) { + /* + * need to have the 1G of mappings continue to be + * present + */ + split_pud(pud, pmd); + } + pud_populate(mm, pud, pmd); + flush_tlb_all(); } + BUG_ON(pud_bad(*pud)); pmd = pmd_offset(pud, addr); do { @@ -187,31 +150,51 @@ static void __init alloc_init_pmd(pud_t *pud, unsigned long addr, /* try section mapping first */ if (((addr | next | phys) & ~SECTION_MASK) == 0) { pmd_t old_pmd =*pmd; - set_pmd(pmd, __pmd(phys | prot_sect)); + set_pmd(pmd, __pmd(phys | + pgprot_val(mk_sect_prot(prot)))); /* * Check for previous table entries created during * boot (__create_page_tables) and flush them. */ - if (!pmd_none(old_pmd)) + if (!pmd_none(old_pmd)) { flush_tlb_all(); + if (pmd_table(old_pmd)) { + phys_addr_t table = __pa(pte_offset_map(&old_pmd, 0)); + if (!WARN_ON_ONCE(slab_is_available())) + memblock_free(table, PAGE_SIZE); + } + } } else { alloc_init_pte(pmd, addr, next, __phys_to_pfn(phys), - prot_pte); + prot, alloc); } phys += next - addr; } while (pmd++, addr = next, addr != end); } -static void __init alloc_init_pud(pgd_t *pgd, unsigned long addr, - unsigned long end, phys_addr_t phys, - int map_io) +static inline bool use_1G_block(unsigned long addr, unsigned long next, + unsigned long phys) +{ + if (PAGE_SHIFT != 12) + return false; + + if (((addr | next | phys) & ~PUD_MASK) != 0) + return false; + + return true; +} + +static void alloc_init_pud(struct mm_struct *mm, pgd_t *pgd, + unsigned long addr, unsigned long end, + phys_addr_t phys, pgprot_t prot, + void *(*alloc)(unsigned long size)) { pud_t *pud; unsigned long next; if (pgd_none(*pgd)) { - pud = early_alloc(PTRS_PER_PUD * sizeof(pud_t)); - pgd_populate(&init_mm, pgd, pud); + pud = alloc(PTRS_PER_PUD * sizeof(pud_t)); + pgd_populate(mm, pgd, pud); } BUG_ON(pgd_bad(*pgd)); @@ -222,10 +205,10 @@ static void __init alloc_init_pud(pgd_t *pgd, unsigned long addr, /* * For 4K granule only, attempt to put down a 1GB block */ - if (!map_io && (PAGE_SHIFT == 12) && - ((addr | next | phys) & ~PUD_MASK) == 0) { + if (use_1G_block(addr, next, phys)) { pud_t old_pud = *pud; - set_pud(pud, __pud(phys | PROT_SECT_NORMAL_EXEC)); + set_pud(pud, __pud(phys | + pgprot_val(mk_sect_prot(prot)))); /* * If we have an old value for a pud, it will @@ -235,12 +218,15 @@ static void __init alloc_init_pud(pgd_t *pgd, unsigned long addr, * Look up the old pmd table and free it. */ if (!pud_none(old_pud)) { - phys_addr_t table = __pa(pmd_offset(&old_pud, 0)); - memblock_free(table, PAGE_SIZE); flush_tlb_all(); + if (pud_table(old_pud)) { + phys_addr_t table = __pa(pmd_offset(&old_pud, 0)); + if (!WARN_ON_ONCE(slab_is_available())) + memblock_free(table, PAGE_SIZE); + } } } else { - alloc_init_pmd(pud, addr, next, phys, map_io); + alloc_init_pmd(mm, pud, addr, next, phys, prot, alloc); } phys += next - addr; } while (pud++, addr = next, addr != end); @@ -250,9 +236,10 @@ static void __init alloc_init_pud(pgd_t *pgd, unsigned long addr, * Create the page directory entries and any necessary page tables for the * mapping specified by 'md'. */ -static void __init __create_mapping(pgd_t *pgd, phys_addr_t phys, - unsigned long virt, phys_addr_t size, - int map_io) +static void __create_mapping(struct mm_struct *mm, pgd_t *pgd, + phys_addr_t phys, unsigned long virt, + phys_addr_t size, pgprot_t prot, + void *(*alloc)(unsigned long size)) { unsigned long addr, length, end, next; @@ -262,31 +249,95 @@ static void __init __create_mapping(pgd_t *pgd, phys_addr_t phys, end = addr + length; do { next = pgd_addr_end(addr, end); - alloc_init_pud(pgd, addr, next, phys, map_io); + alloc_init_pud(mm, pgd, addr, next, phys, prot, alloc); phys += next - addr; } while (pgd++, addr = next, addr != end); } -static void __init create_mapping(phys_addr_t phys, unsigned long virt, - phys_addr_t size) +static void *late_alloc(unsigned long size) +{ + void *ptr; + + BUG_ON(size > PAGE_SIZE); + ptr = (void *)__get_free_page(PGALLOC_GFP); + BUG_ON(!ptr); + return ptr; +} + +static void __ref create_mapping(phys_addr_t phys, unsigned long virt, + phys_addr_t size, pgprot_t prot) { if (virt < VMALLOC_START) { pr_warn("BUG: not creating mapping for %pa at 0x%016lx - outside kernel range\n", &phys, virt); return; } - __create_mapping(pgd_offset_k(virt & PAGE_MASK), phys, virt, size, 0); + __create_mapping(&init_mm, pgd_offset_k(virt & PAGE_MASK), phys, virt, + size, prot, early_alloc); +} + +void __init create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys, + unsigned long virt, phys_addr_t size, + pgprot_t prot) +{ + __create_mapping(mm, pgd_offset(mm, virt), phys, virt, size, prot, + late_alloc); } -void __init create_id_mapping(phys_addr_t addr, phys_addr_t size, int map_io) +static void create_mapping_late(phys_addr_t phys, unsigned long virt, + phys_addr_t size, pgprot_t prot) { - if ((addr >> PGDIR_SHIFT) >= ARRAY_SIZE(idmap_pg_dir)) { - pr_warn("BUG: not creating id mapping for %pa\n", &addr); + if (virt < VMALLOC_START) { + pr_warn("BUG: not creating mapping for %pa at 0x%016lx - outside kernel range\n", + &phys, virt); return; } - __create_mapping(&idmap_pg_dir[pgd_index(addr)], - addr, addr, size, map_io); + + return __create_mapping(&init_mm, pgd_offset_k(virt & PAGE_MASK), + phys, virt, size, prot, late_alloc); +} + +#ifdef CONFIG_DEBUG_RODATA +static void __init __map_memblock(phys_addr_t start, phys_addr_t end) +{ + /* + * Set up the executable regions using the existing section mappings + * for now. This will get more fine grained later once all memory + * is mapped + */ + unsigned long kernel_x_start = round_down(__pa(_stext), SECTION_SIZE); + unsigned long kernel_x_end = round_up(__pa(__init_end), SECTION_SIZE); + + if (end < kernel_x_start) { + create_mapping(start, __phys_to_virt(start), + end - start, PAGE_KERNEL); + } else if (start >= kernel_x_end) { + create_mapping(start, __phys_to_virt(start), + end - start, PAGE_KERNEL); + } else { + if (start < kernel_x_start) + create_mapping(start, __phys_to_virt(start), + kernel_x_start - start, + PAGE_KERNEL); + create_mapping(kernel_x_start, + __phys_to_virt(kernel_x_start), + kernel_x_end - kernel_x_start, + PAGE_KERNEL_EXEC); + if (kernel_x_end < end) + create_mapping(kernel_x_end, + __phys_to_virt(kernel_x_end), + end - kernel_x_end, + PAGE_KERNEL); + } + } +#else +static void __init __map_memblock(phys_addr_t start, phys_addr_t end) +{ + create_mapping(start, __phys_to_virt(start), end - start, + PAGE_KERNEL_EXEC); +} +#endif static void __init map_mem(void) { @@ -332,14 +383,53 @@ static void __init map_mem(void) memblock_set_current_limit(limit); } #endif - - create_mapping(start, __phys_to_virt(start), end - start); + __map_memblock(start, end); } /* Limit no longer required. */ memblock_set_current_limit(MEMBLOCK_ALLOC_ANYWHERE); } +void __init fixup_executable(void) +{ +#ifdef CONFIG_DEBUG_RODATA + /* now that we are actually fully mapped, make the start/end more fine grained */ + if (!IS_ALIGNED((unsigned long)_stext, SECTION_SIZE)) { + unsigned long aligned_start = round_down(__pa(_stext), + SECTION_SIZE); + + create_mapping(aligned_start, __phys_to_virt(aligned_start), + __pa(_stext) - aligned_start, + PAGE_KERNEL); + } + + if (!IS_ALIGNED((unsigned long)__init_end, SECTION_SIZE)) { + unsigned long aligned_end = round_up(__pa(__init_end), + SECTION_SIZE); + create_mapping(__pa(__init_end), (unsigned long)__init_end, + aligned_end - __pa(__init_end), + PAGE_KERNEL); + } +#endif +} + +#ifdef CONFIG_DEBUG_RODATA +void mark_rodata_ro(void) +{ + create_mapping_late(__pa(_stext), (unsigned long)_stext, + (unsigned long)_etext - (unsigned long)_stext, + PAGE_KERNEL_EXEC | PTE_RDONLY); + +} +#endif + +void fixup_init(void) +{ + create_mapping_late(__pa(__init_begin), (unsigned long)__init_begin, + (unsigned long)__init_end - (unsigned long)__init_begin, + PAGE_KERNEL); +} + /* * paging_init() sets up the page tables, initialises the zone memory * maps and sets up the zero page. @@ -349,13 +439,7 @@ void __init paging_init(void) void *zero_page; map_mem(); - - /* - * Finally flush the caches and tlb to ensure that we're in a - * consistent state. - */ - flush_cache_all(); - flush_tlb_all(); + fixup_executable(); /* allocate the zero page. */ zero_page = early_alloc(PAGE_SIZE); diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index 4e778b13291b..28eebfb6af76 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -102,7 +102,7 @@ ENTRY(cpu_do_idle) ret ENDPROC(cpu_do_idle) -#ifdef CONFIG_ARM64_CPU_SUSPEND +#ifdef CONFIG_CPU_PM /** * cpu_do_suspend - save CPU registers context * @@ -244,14 +244,18 @@ ENTRY(__cpu_setup) ENDPROC(__cpu_setup) /* + * We set the desired value explicitly, including those of the + * reserved bits. The values of bits EE & E0E were set early in + * el2_setup, which are left untouched below. + * * n n T * U E WT T UD US IHBS * CE0 XWHW CZ ME TEEA S * .... .IEE .... NEAI TE.I ..AD DEN0 ACAM - * 0011 0... 1101 ..0. ..0. 10.. .... .... < hardware reserved - * .... .1.. .... 01.1 11.1 ..01 0001 1101 < software settings + * 0011 0... 1101 ..0. ..0. 10.. .0.. .... < hardware reserved + * .... .1.. .... 01.1 11.1 ..01 0.01 1101 < software settings */ .type crval, #object crval: - .word 0x000802e2 // clear - .word 0x0405d11d // set + .word 0xfcffffff // clear + .word 0x34d5d91d // set |