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-rw-r--r--MAINTAINERS1
-rw-r--r--arch/s390/Kconfig8
-rw-r--r--arch/s390/Kconfig.debug12
-rw-r--r--arch/s390/crypto/aes_s390.c4
-rw-r--r--arch/s390/include/asm/asm-extable.h91
-rw-r--r--arch/s390/include/asm/kexec.h2
-rw-r--r--arch/s390/include/asm/processor.h6
-rw-r--r--arch/s390/include/asm/stacktrace.h11
-rw-r--r--arch/s390/include/asm/uaccess.h217
-rw-r--r--arch/s390/kernel/Makefile2
-rw-r--r--arch/s390/kernel/asm-offsets.c26
-rw-r--r--arch/s390/kernel/early.c5
-rw-r--r--arch/s390/kernel/earlypgm.S (renamed from arch/s390/kernel/base.S)33
-rw-r--r--arch/s390/kernel/entry.S23
-rw-r--r--arch/s390/kernel/entry.h2
-rw-r--r--arch/s390/kernel/perf_event.c2
-rw-r--r--arch/s390/mm/extable.c39
-rw-r--r--arch/s390/mm/gmap.c14
-rw-r--r--arch/s390/mm/pgtable.c2
19 files changed, 289 insertions, 211 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index 9516861da194..81506da30425 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -21057,6 +21057,7 @@ F: include/uapi/linux/virtio_crypto.h
VIRTIO DRIVERS FOR S390
M: Cornelia Huck <cohuck@redhat.com>
M: Halil Pasic <pasic@linux.ibm.com>
+M: Eric Farman <farman@linux.ibm.com>
L: linux-s390@vger.kernel.org
L: virtualization@lists.linux-foundation.org
L: kvm@vger.kernel.org
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index b17239ae7bd4..b1a88f6cc349 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -732,11 +732,11 @@ config VFIO_AP
depends on S390_AP_IOMMU && VFIO_MDEV && KVM
depends on ZCRYPT
help
- This driver grants access to Adjunct Processor (AP) devices
- via the VFIO mediated device interface.
+ This driver grants access to Adjunct Processor (AP) devices
+ via the VFIO mediated device interface.
- To compile this driver as a module, choose M here: the module
- will be called vfio_ap.
+ To compile this driver as a module, choose M here: the module
+ will be called vfio_ap.
endmenu
diff --git a/arch/s390/Kconfig.debug b/arch/s390/Kconfig.debug
index e94a2a7f6bf4..c4300ea4abf8 100644
--- a/arch/s390/Kconfig.debug
+++ b/arch/s390/Kconfig.debug
@@ -14,9 +14,9 @@ config DEBUG_ENTRY
If unsure, say N.
config CIO_INJECT
- bool "CIO Inject interfaces"
- depends on DEBUG_KERNEL && DEBUG_FS
- help
- This option provides a debugging facility to inject certain artificial events
- and instruction responses to the CIO layer of Linux kernel. The newly created
- debugfs user-interfaces will be at /sys/kernel/debug/s390/cio/*
+ bool "CIO Inject interfaces"
+ depends on DEBUG_KERNEL && DEBUG_FS
+ help
+ This option provides a debugging facility to inject certain artificial events
+ and instruction responses to the CIO layer of Linux kernel. The newly created
+ debugfs user-interfaces will be at /sys/kernel/debug/s390/cio/*
diff --git a/arch/s390/crypto/aes_s390.c b/arch/s390/crypto/aes_s390.c
index 54c7536f2482..1023e9d43d44 100644
--- a/arch/s390/crypto/aes_s390.c
+++ b/arch/s390/crypto/aes_s390.c
@@ -701,7 +701,7 @@ static inline void _gcm_sg_unmap_and_advance(struct gcm_sg_walk *gw,
unsigned int nbytes)
{
gw->walk_bytes_remain -= nbytes;
- scatterwalk_unmap(&gw->walk);
+ scatterwalk_unmap(gw->walk_ptr);
scatterwalk_advance(&gw->walk, nbytes);
scatterwalk_done(&gw->walk, 0, gw->walk_bytes_remain);
gw->walk_ptr = NULL;
@@ -776,7 +776,7 @@ static int gcm_out_walk_go(struct gcm_sg_walk *gw, unsigned int minbytesneeded)
goto out;
}
- scatterwalk_unmap(&gw->walk);
+ scatterwalk_unmap(gw->walk_ptr);
gw->walk_ptr = NULL;
gw->ptr = gw->buf;
diff --git a/arch/s390/include/asm/asm-extable.h b/arch/s390/include/asm/asm-extable.h
index f24d9591aaed..b74f1070ddb2 100644
--- a/arch/s390/include/asm/asm-extable.h
+++ b/arch/s390/include/asm/asm-extable.h
@@ -3,12 +3,24 @@
#define __ASM_EXTABLE_H
#include <linux/stringify.h>
+#include <linux/bits.h>
#include <asm/asm-const.h>
-#define EX_TYPE_NONE 0
-#define EX_TYPE_FIXUP 1
-#define EX_TYPE_BPF 2
-#define EX_TYPE_UACCESS 3
+#define EX_TYPE_NONE 0
+#define EX_TYPE_FIXUP 1
+#define EX_TYPE_BPF 2
+#define EX_TYPE_UA_STORE 3
+#define EX_TYPE_UA_LOAD_MEM 4
+#define EX_TYPE_UA_LOAD_REG 5
+
+#define EX_DATA_REG_ERR_SHIFT 0
+#define EX_DATA_REG_ERR GENMASK(3, 0)
+
+#define EX_DATA_REG_ADDR_SHIFT 4
+#define EX_DATA_REG_ADDR GENMASK(7, 4)
+
+#define EX_DATA_LEN_SHIFT 8
+#define EX_DATA_LEN GENMASK(11, 8)
#define __EX_TABLE(_section, _fault, _target, _type) \
stringify_in_c(.section _section,"a";) \
@@ -19,35 +31,58 @@
stringify_in_c(.short 0;) \
stringify_in_c(.previous)
-#define __EX_TABLE_UA(_section, _fault, _target, _type, _reg) \
- stringify_in_c(.section _section,"a";) \
- stringify_in_c(.align 4;) \
- stringify_in_c(.long (_fault) - .;) \
- stringify_in_c(.long (_target) - .;) \
- stringify_in_c(.short (_type);) \
- stringify_in_c(.macro extable_reg reg;) \
- stringify_in_c(.set .Lfound, 0;) \
- stringify_in_c(.set .Lregnr, 0;) \
- stringify_in_c(.irp rs,r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,r13,r14,r15;) \
- stringify_in_c(.ifc "\reg", "%%\rs";) \
- stringify_in_c(.set .Lfound, 1;) \
- stringify_in_c(.short .Lregnr;) \
- stringify_in_c(.endif;) \
- stringify_in_c(.set .Lregnr, .Lregnr+1;) \
- stringify_in_c(.endr;) \
- stringify_in_c(.ifne (.Lfound != 1);) \
- stringify_in_c(.error "extable_reg: bad register argument";) \
- stringify_in_c(.endif;) \
- stringify_in_c(.endm;) \
- stringify_in_c(extable_reg _reg;) \
- stringify_in_c(.purgem extable_reg;) \
+#define __EX_TABLE_UA(_section, _fault, _target, _type, _regerr, _regaddr, _len)\
+ stringify_in_c(.section _section,"a";) \
+ stringify_in_c(.align 4;) \
+ stringify_in_c(.long (_fault) - .;) \
+ stringify_in_c(.long (_target) - .;) \
+ stringify_in_c(.short (_type);) \
+ stringify_in_c(.macro extable_reg regerr, regaddr;) \
+ stringify_in_c(.set .Lfound, 0;) \
+ stringify_in_c(.set .Lcurr, 0;) \
+ stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \
+ stringify_in_c( .ifc "\regerr", "%%r\rs";) \
+ stringify_in_c( .set .Lfound, 1;) \
+ stringify_in_c( .set .Lregerr, .Lcurr;) \
+ stringify_in_c( .endif;) \
+ stringify_in_c( .set .Lcurr, .Lcurr+1;) \
+ stringify_in_c(.endr;) \
+ stringify_in_c(.ifne (.Lfound != 1);) \
+ stringify_in_c( .error "extable_reg: bad register argument1";) \
+ stringify_in_c(.endif;) \
+ stringify_in_c(.set .Lfound, 0;) \
+ stringify_in_c(.set .Lcurr, 0;) \
+ stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \
+ stringify_in_c( .ifc "\regaddr", "%%r\rs";) \
+ stringify_in_c( .set .Lfound, 1;) \
+ stringify_in_c( .set .Lregaddr, .Lcurr;) \
+ stringify_in_c( .endif;) \
+ stringify_in_c( .set .Lcurr, .Lcurr+1;) \
+ stringify_in_c(.endr;) \
+ stringify_in_c(.ifne (.Lfound != 1);) \
+ stringify_in_c( .error "extable_reg: bad register argument2";) \
+ stringify_in_c(.endif;) \
+ stringify_in_c(.short .Lregerr << EX_DATA_REG_ERR_SHIFT | \
+ .Lregaddr << EX_DATA_REG_ADDR_SHIFT | \
+ _len << EX_DATA_LEN_SHIFT;) \
+ stringify_in_c(.endm;) \
+ stringify_in_c(extable_reg _regerr,_regaddr;) \
+ stringify_in_c(.purgem extable_reg;) \
stringify_in_c(.previous)
#define EX_TABLE(_fault, _target) \
__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FIXUP)
+
#define EX_TABLE_AMODE31(_fault, _target) \
__EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP)
-#define EX_TABLE_UA(_fault, _target, _reg) \
- __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UACCESS, _reg)
+
+#define EX_TABLE_UA_STORE(_fault, _target, _regerr) \
+ __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_STORE, _regerr, _regerr, 0)
+
+#define EX_TABLE_UA_LOAD_MEM(_fault, _target, _regerr, _regmem, _len) \
+ __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_MEM, _regerr, _regmem, _len)
+
+#define EX_TABLE_UA_LOAD_REG(_fault, _target, _regerr, _regzero) \
+ __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REG, _regerr, _regzero, 0)
#endif /* __ASM_EXTABLE_H */
diff --git a/arch/s390/include/asm/kexec.h b/arch/s390/include/asm/kexec.h
index 63098df81c9f..649ecdcc8734 100644
--- a/arch/s390/include/asm/kexec.h
+++ b/arch/s390/include/asm/kexec.h
@@ -31,7 +31,7 @@
#define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)
/* Allocate control page with GFP_DMA */
-#define KEXEC_CONTROL_MEMORY_GFP GFP_DMA
+#define KEXEC_CONTROL_MEMORY_GFP (GFP_DMA | __GFP_NORETRY)
/* Maximum address we can use for the crash control pages */
#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index add764a2be8c..bd66f8e34949 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -304,12 +304,6 @@ static __always_inline void __noreturn disabled_wait(void)
while (1);
}
-/*
- * Basic Program Check Handler.
- */
-extern void s390_base_pgm_handler(void);
-extern void (*s390_base_pgm_handler_fn)(struct pt_regs *regs);
-
#define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL
extern int memcpy_real(void *, unsigned long, size_t);
diff --git a/arch/s390/include/asm/stacktrace.h b/arch/s390/include/asm/stacktrace.h
index f8500191993d..b23c658dce77 100644
--- a/arch/s390/include/asm/stacktrace.h
+++ b/arch/s390/include/asm/stacktrace.h
@@ -39,8 +39,15 @@ static inline bool on_stack(struct stack_info *info,
* Kernel uses the packed stack layout (-mpacked-stack).
*/
struct stack_frame {
- unsigned long empty1[5];
- unsigned int empty2[8];
+ union {
+ unsigned long empty[9];
+ struct {
+ unsigned long sie_control_block;
+ unsigned long sie_savearea;
+ unsigned long sie_reason;
+ unsigned long sie_flags;
+ };
+ };
unsigned long gprs[10];
unsigned long back_chain;
};
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index 1f150a7cfb3d..f4511e21d646 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -3,7 +3,7 @@
* S390 version
* Copyright IBM Corp. 1999, 2000
* Author(s): Hartmut Penner (hp@de.ibm.com),
- * Martin Schwidefsky (schwidefsky@de.ibm.com)
+ * Martin Schwidefsky (schwidefsky@de.ibm.com)
*
* Derived from "include/asm-i386/uaccess.h"
*/
@@ -55,9 +55,6 @@ copy_to_user_key(void __user *to, const void *from, unsigned long n, unsigned lo
return n;
}
-int __put_user_bad(void) __attribute__((noreturn));
-int __get_user_bad(void) __attribute__((noreturn));
-
union oac {
unsigned int val;
struct {
@@ -80,8 +77,14 @@ union oac {
};
};
-#define __put_get_user_asm(to, from, size, oac_spec) \
+int __noreturn __put_user_bad(void);
+
+#define __put_user_asm(to, from, size) \
({ \
+ union oac __oac_spec = { \
+ .oac1.as = PSW_BITS_AS_SECONDARY, \
+ .oac1.a = 1, \
+ }; \
int __rc; \
\
asm volatile( \
@@ -89,26 +92,15 @@ union oac {
"0: mvcos %[_to],%[_from],%[_size]\n" \
"1: xr %[rc],%[rc]\n" \
"2:\n" \
- EX_TABLE_UA(0b,2b,%[rc]) EX_TABLE_UA(1b,2b,%[rc]) \
+ EX_TABLE_UA_STORE(0b, 2b, %[rc]) \
+ EX_TABLE_UA_STORE(1b, 2b, %[rc]) \
: [rc] "=&d" (__rc), [_to] "+Q" (*(to)) \
: [_size] "d" (size), [_from] "Q" (*(from)), \
- [spec] "d" (oac_spec.val) \
+ [spec] "d" (__oac_spec.val) \
: "cc", "0"); \
__rc; \
})
-#define __put_user_asm(to, from, size) \
- __put_get_user_asm(to, from, size, ((union oac) { \
- .oac1.as = PSW_BITS_AS_SECONDARY, \
- .oac1.a = 1 \
- }))
-
-#define __get_user_asm(to, from, size) \
- __put_get_user_asm(to, from, size, ((union oac) { \
- .oac2.as = PSW_BITS_AS_SECONDARY, \
- .oac2.a = 1 \
- })) \
-
static __always_inline int __put_user_fn(void *x, void __user *ptr, unsigned long size)
{
int rc;
@@ -141,6 +133,31 @@ static __always_inline int __put_user_fn(void *x, void __user *ptr, unsigned lon
return rc;
}
+int __noreturn __get_user_bad(void);
+
+#define __get_user_asm(to, from, size) \
+({ \
+ union oac __oac_spec = { \
+ .oac2.as = PSW_BITS_AS_SECONDARY, \
+ .oac2.a = 1, \
+ }; \
+ int __rc; \
+ \
+ asm volatile( \
+ " lr 0,%[spec]\n" \
+ "0: mvcos 0(%[_to]),%[_from],%[_size]\n" \
+ "1: xr %[rc],%[rc]\n" \
+ "2:\n" \
+ EX_TABLE_UA_LOAD_MEM(0b, 2b, %[rc], %[_to], %[_ksize]) \
+ EX_TABLE_UA_LOAD_MEM(1b, 2b, %[rc], %[_to], %[_ksize]) \
+ : [rc] "=&d" (__rc), "=Q" (*(to)) \
+ : [_size] "d" (size), [_from] "Q" (*(from)), \
+ [spec] "d" (__oac_spec.val), [_to] "a" (to), \
+ [_ksize] "K" (size) \
+ : "cc", "0"); \
+ __rc; \
+})
+
static __always_inline int __get_user_fn(void *x, const void __user *ptr, unsigned long size)
{
int rc;
@@ -177,77 +194,77 @@ static __always_inline int __get_user_fn(void *x, const void __user *ptr, unsign
* These are the main single-value transfer routines. They automatically
* use the right size if we just have the right pointer type.
*/
-#define __put_user(x, ptr) \
-({ \
- __typeof__(*(ptr)) __x = (x); \
- int __pu_err = -EFAULT; \
- __chk_user_ptr(ptr); \
- switch (sizeof (*(ptr))) { \
- case 1: \
- case 2: \
- case 4: \
- case 8: \
- __pu_err = __put_user_fn(&__x, ptr, \
- sizeof(*(ptr))); \
- break; \
- default: \
- __put_user_bad(); \
- break; \
- } \
- __builtin_expect(__pu_err, 0); \
+#define __put_user(x, ptr) \
+({ \
+ __typeof__(*(ptr)) __x = (x); \
+ int __pu_err = -EFAULT; \
+ \
+ __chk_user_ptr(ptr); \
+ switch (sizeof(*(ptr))) { \
+ case 1: \
+ case 2: \
+ case 4: \
+ case 8: \
+ __pu_err = __put_user_fn(&__x, ptr, sizeof(*(ptr))); \
+ break; \
+ default: \
+ __put_user_bad(); \
+ break; \
+ } \
+ __builtin_expect(__pu_err, 0); \
})
-#define put_user(x, ptr) \
-({ \
- might_fault(); \
- __put_user(x, ptr); \
+#define put_user(x, ptr) \
+({ \
+ might_fault(); \
+ __put_user(x, ptr); \
})
-
-#define __get_user(x, ptr) \
-({ \
- int __gu_err = -EFAULT; \
- __chk_user_ptr(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: { \
- unsigned char __x = 0; \
- __gu_err = __get_user_fn(&__x, ptr, \
- sizeof(*(ptr))); \
- (x) = *(__force __typeof__(*(ptr)) *) &__x; \
- break; \
- }; \
- case 2: { \
- unsigned short __x = 0; \
- __gu_err = __get_user_fn(&__x, ptr, \
- sizeof(*(ptr))); \
- (x) = *(__force __typeof__(*(ptr)) *) &__x; \
- break; \
- }; \
- case 4: { \
- unsigned int __x = 0; \
- __gu_err = __get_user_fn(&__x, ptr, \
- sizeof(*(ptr))); \
- (x) = *(__force __typeof__(*(ptr)) *) &__x; \
- break; \
- }; \
- case 8: { \
- unsigned long long __x = 0; \
- __gu_err = __get_user_fn(&__x, ptr, \
- sizeof(*(ptr))); \
- (x) = *(__force __typeof__(*(ptr)) *) &__x; \
- break; \
- }; \
- default: \
- __get_user_bad(); \
- break; \
- } \
- __builtin_expect(__gu_err, 0); \
+#define __get_user(x, ptr) \
+({ \
+ int __gu_err = -EFAULT; \
+ \
+ __chk_user_ptr(ptr); \
+ switch (sizeof(*(ptr))) { \
+ case 1: { \
+ unsigned char __x; \
+ \
+ __gu_err = __get_user_fn(&__x, ptr, sizeof(*(ptr))); \
+ (x) = *(__force __typeof__(*(ptr)) *)&__x; \
+ break; \
+ }; \
+ case 2: { \
+ unsigned short __x; \
+ \
+ __gu_err = __get_user_fn(&__x, ptr, sizeof(*(ptr))); \
+ (x) = *(__force __typeof__(*(ptr)) *)&__x; \
+ break; \
+ }; \
+ case 4: { \
+ unsigned int __x; \
+ \
+ __gu_err = __get_user_fn(&__x, ptr, sizeof(*(ptr))); \
+ (x) = *(__force __typeof__(*(ptr)) *)&__x; \
+ break; \
+ }; \
+ case 8: { \
+ unsigned long __x; \
+ \
+ __gu_err = __get_user_fn(&__x, ptr, sizeof(*(ptr))); \
+ (x) = *(__force __typeof__(*(ptr)) *)&__x; \
+ break; \
+ }; \
+ default: \
+ __get_user_bad(); \
+ break; \
+ } \
+ __builtin_expect(__gu_err, 0); \
})
-#define get_user(x, ptr) \
-({ \
- might_fault(); \
- __get_user(x, ptr); \
+#define get_user(x, ptr) \
+({ \
+ might_fault(); \
+ __get_user(x, ptr); \
})
/*
@@ -278,19 +295,20 @@ int __noreturn __put_kernel_bad(void);
int __rc; \
\
asm volatile( \
- "0: " insn " %2,%1\n" \
- "1: xr %0,%0\n" \
+ "0: " insn " %[_val],%[_to]\n" \
+ "1: xr %[rc],%[rc]\n" \
"2:\n" \
- EX_TABLE_UA(0b,2b,%0) EX_TABLE_UA(1b,2b,%0) \
- : "=d" (__rc), "+Q" (*(to)) \
- : "d" (val) \
+ EX_TABLE_UA_STORE(0b, 2b, %[rc]) \
+ EX_TABLE_UA_STORE(1b, 2b, %[rc]) \
+ : [rc] "=d" (__rc), [_to] "+Q" (*(to)) \
+ : [_val] "d" (val) \
: "cc"); \
__rc; \
})
#define __put_kernel_nofault(dst, src, type, err_label) \
do { \
- u64 __x = (u64)(*((type *)(src))); \
+ unsigned long __x = (unsigned long)(*((type *)(src))); \
int __pk_err; \
\
switch (sizeof(type)) { \
@@ -321,12 +339,13 @@ int __noreturn __get_kernel_bad(void);
int __rc; \
\
asm volatile( \
- "0: " insn " %1,%2\n" \
- "1: xr %0,%0\n" \
+ "0: " insn " %[_val],%[_from]\n" \
+ "1: xr %[rc],%[rc]\n" \
"2:\n" \
- EX_TABLE_UA(0b,2b,%0) EX_TABLE_UA(1b,2b,%0) \
- : "=d" (__rc), "+d" (val) \
- : "Q" (*(from)) \
+ EX_TABLE_UA_LOAD_REG(0b, 2b, %[rc], %[_val]) \
+ EX_TABLE_UA_LOAD_REG(1b, 2b, %[rc], %[_val]) \
+ : [rc] "=d" (__rc), [_val] "=d" (val) \
+ : [_from] "Q" (*(from)) \
: "cc"); \
__rc; \
})
@@ -337,28 +356,28 @@ do { \
\
switch (sizeof(type)) { \
case 1: { \
- u8 __x = 0; \
+ unsigned char __x; \
\
__gk_err = __get_kernel_asm(__x, (type *)(src), "ic"); \
*((type *)(dst)) = (type)__x; \
break; \
}; \
case 2: { \
- u16 __x = 0; \
+ unsigned short __x; \
\
__gk_err = __get_kernel_asm(__x, (type *)(src), "lh"); \
*((type *)(dst)) = (type)__x; \
break; \
}; \
case 4: { \
- u32 __x = 0; \
+ unsigned int __x; \
\
__gk_err = __get_kernel_asm(__x, (type *)(src), "l"); \
*((type *)(dst)) = (type)__x; \
break; \
}; \
case 8: { \
- u64 __x = 0; \
+ unsigned long __x; \
\
__gk_err = __get_kernel_asm(__x, (type *)(src), "lg"); \
*((type *)(dst)) = (type)__x; \
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 5851041bb214..27d6b3c7aa06 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -33,7 +33,7 @@ CFLAGS_stacktrace.o += -fno-optimize-sibling-calls
CFLAGS_dumpstack.o += -fno-optimize-sibling-calls
CFLAGS_unwind_bc.o += -fno-optimize-sibling-calls
-obj-y := traps.o time.o process.o base.o early.o setup.o idle.o vtime.o
+obj-y := traps.o time.o process.o earlypgm.o early.o setup.o idle.o vtime.o
obj-y += processor.o syscall.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o
obj-y += debug.o irq.o ipl.o dis.o diag.o vdso.o
obj-y += sysinfo.o lgr.o os_info.o machine_kexec.o
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index 7c74f0e17e5a..d8ce965c0a97 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -32,6 +32,22 @@ int main(void)
/* pt_regs offsets */
OFFSET(__PT_PSW, pt_regs, psw);
OFFSET(__PT_GPRS, pt_regs, gprs);
+ OFFSET(__PT_R0, pt_regs, gprs[0]);
+ OFFSET(__PT_R1, pt_regs, gprs[1]);
+ OFFSET(__PT_R2, pt_regs, gprs[2]);
+ OFFSET(__PT_R3, pt_regs, gprs[3]);
+ OFFSET(__PT_R4, pt_regs, gprs[4]);
+ OFFSET(__PT_R5, pt_regs, gprs[5]);
+ OFFSET(__PT_R6, pt_regs, gprs[6]);
+ OFFSET(__PT_R7, pt_regs, gprs[7]);
+ OFFSET(__PT_R8, pt_regs, gprs[8]);
+ OFFSET(__PT_R9, pt_regs, gprs[9]);
+ OFFSET(__PT_R10, pt_regs, gprs[10]);
+ OFFSET(__PT_R11, pt_regs, gprs[11]);
+ OFFSET(__PT_R12, pt_regs, gprs[12]);
+ OFFSET(__PT_R13, pt_regs, gprs[13]);
+ OFFSET(__PT_R14, pt_regs, gprs[14]);
+ OFFSET(__PT_R15, pt_regs, gprs[15]);
OFFSET(__PT_ORIG_GPR2, pt_regs, orig_gpr2);
OFFSET(__PT_FLAGS, pt_regs, flags);
OFFSET(__PT_CR1, pt_regs, cr1);
@@ -41,11 +57,11 @@ int main(void)
/* stack_frame offsets */
OFFSET(__SF_BACKCHAIN, stack_frame, back_chain);
OFFSET(__SF_GPRS, stack_frame, gprs);
- OFFSET(__SF_EMPTY, stack_frame, empty1[0]);
- OFFSET(__SF_SIE_CONTROL, stack_frame, empty1[1]);
- OFFSET(__SF_SIE_SAVEAREA, stack_frame, empty1[2]);
- OFFSET(__SF_SIE_REASON, stack_frame, empty1[3]);
- OFFSET(__SF_SIE_FLAGS, stack_frame, empty1[4]);
+ OFFSET(__SF_EMPTY, stack_frame, empty[0]);
+ OFFSET(__SF_SIE_CONTROL, stack_frame, sie_control_block);
+ OFFSET(__SF_SIE_SAVEAREA, stack_frame, sie_savearea);
+ OFFSET(__SF_SIE_REASON, stack_frame, sie_reason);
+ OFFSET(__SF_SIE_FLAGS, stack_frame, sie_flags);
DEFINE(STACK_FRAME_OVERHEAD, sizeof(struct stack_frame));
BLANK();
/* idle data offsets */
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 08cc86a0db90..432c8c987256 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -149,7 +149,7 @@ static __init void setup_topology(void)
topology_max_mnest = max_mnest;
}
-static void early_pgm_check_handler(struct pt_regs *regs)
+void __do_early_pgm_check(struct pt_regs *regs)
{
if (!fixup_exception(regs))
disabled_wait();
@@ -159,12 +159,11 @@ static noinline __init void setup_lowcore_early(void)
{
psw_t psw;
- psw.addr = (unsigned long)s390_base_pgm_handler;
+ psw.addr = (unsigned long)early_pgm_check_handler;
psw.mask = PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA;
if (IS_ENABLED(CONFIG_KASAN))
psw.mask |= PSW_MASK_DAT;
S390_lowcore.program_new_psw = psw;
- s390_base_pgm_handler_fn = early_pgm_check_handler;
S390_lowcore.preempt_count = INIT_PREEMPT_COUNT;
}
diff --git a/arch/s390/kernel/base.S b/arch/s390/kernel/earlypgm.S
index 172c23c8ca00..f521c6da37b8 100644
--- a/arch/s390/kernel/base.S
+++ b/arch/s390/kernel/earlypgm.S
@@ -1,23 +1,13 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
- * arch/s390/kernel/base.S
- *
* Copyright IBM Corp. 2006, 2007
* Author(s): Michael Holzheu <holzheu@de.ibm.com>
*/
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
-#include <asm/nospec-insn.h>
-#include <asm/ptrace.h>
- GEN_BR_THUNK %r9
- GEN_BR_THUNK %r14
-
-__PT_R0 = __PT_GPRS
-__PT_R8 = __PT_GPRS + 64
-
-ENTRY(s390_base_pgm_handler)
+ENTRY(early_pgm_check_handler)
stmg %r8,%r15,__LC_SAVE_AREA_SYNC
aghi %r15,-(STACK_FRAME_OVERHEAD+__PT_SIZE)
la %r11,STACK_FRAME_OVERHEAD(%r15)
@@ -26,25 +16,8 @@ ENTRY(s390_base_pgm_handler)
mvc __PT_PSW(16,%r11),__LC_PGM_OLD_PSW
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC
lgr %r2,%r11
- larl %r1,s390_base_pgm_handler_fn
- lg %r9,0(%r1)
- ltgr %r9,%r9
- jz 1f
- BASR_EX %r14,%r9
+ brasl %r14,__do_early_pgm_check
mvc __LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
lmg %r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
lpswe __LC_RETURN_PSW
-1: larl %r13,disabled_wait_psw
- lpswe 0(%r13)
-ENDPROC(s390_base_pgm_handler)
-
- .align 8
-disabled_wait_psw:
- .quad 0x0002000180000000,0x0000000000000000 + s390_base_pgm_handler
-
- .section .bss
- .align 8
- .globl s390_base_pgm_handler_fn
-s390_base_pgm_handler_fn:
- .quad 0
- .previous
+ENDPROC(early_pgm_check_handler)
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index df41132ccd06..d2a1f2f4f5b8 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -29,23 +29,6 @@
#include <asm/export.h>
#include <asm/nospec-insn.h>
-__PT_R0 = __PT_GPRS
-__PT_R1 = __PT_GPRS + 8
-__PT_R2 = __PT_GPRS + 16
-__PT_R3 = __PT_GPRS + 24
-__PT_R4 = __PT_GPRS + 32
-__PT_R5 = __PT_GPRS + 40
-__PT_R6 = __PT_GPRS + 48
-__PT_R7 = __PT_GPRS + 56
-__PT_R8 = __PT_GPRS + 64
-__PT_R9 = __PT_GPRS + 72
-__PT_R10 = __PT_GPRS + 80
-__PT_R11 = __PT_GPRS + 88
-__PT_R12 = __PT_GPRS + 96
-__PT_R13 = __PT_GPRS + 104
-__PT_R14 = __PT_GPRS + 112
-__PT_R15 = __PT_GPRS + 120
-
STACK_SHIFT = PAGE_SHIFT + THREAD_SIZE_ORDER
STACK_SIZE = 1 << STACK_SHIFT
STACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
@@ -268,6 +251,10 @@ ENTRY(sie64a)
BPEXIT __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
.Lsie_entry:
sie 0(%r14)
+# Let the next instruction be NOP to avoid triggering a machine check
+# and handling it in a guest as result of the instruction execution.
+ nopr 7
+.Lsie_leave:
BPOFF
BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
.Lsie_skip:
@@ -564,7 +551,7 @@ ENTRY(mcck_int_handler)
jno .Lmcck_panic
#if IS_ENABLED(CONFIG_KVM)
OUTSIDE %r9,.Lsie_gmap,.Lsie_done,6f
- OUTSIDE %r9,.Lsie_entry,.Lsie_skip,4f
+ OUTSIDE %r9,.Lsie_entry,.Lsie_leave,4f
oi __LC_CPU_FLAGS+7, _CIF_MCCK_GUEST
j 5f
4: CHKSTG .Lmcck_panic
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index 56e5e3712fbb..995ec7449feb 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -17,10 +17,12 @@ void ext_int_handler(void);
void io_int_handler(void);
void mcck_int_handler(void);
void restart_int_handler(void);
+void early_pgm_check_handler(void);
void __ret_from_fork(struct task_struct *prev, struct pt_regs *regs);
void __do_pgm_check(struct pt_regs *regs);
void __do_syscall(struct pt_regs *regs, int per_trap);
+void __do_early_pgm_check(struct pt_regs *regs);
void do_protection_exception(struct pt_regs *regs);
void do_dat_exception(struct pt_regs *regs);
diff --git a/arch/s390/kernel/perf_event.c b/arch/s390/kernel/perf_event.c
index ea7729bebaa0..c27321cb0969 100644
--- a/arch/s390/kernel/perf_event.c
+++ b/arch/s390/kernel/perf_event.c
@@ -30,7 +30,7 @@ static struct kvm_s390_sie_block *sie_block(struct pt_regs *regs)
if (!stack)
return NULL;
- return (struct kvm_s390_sie_block *) stack->empty1[0];
+ return (struct kvm_s390_sie_block *)stack->sie_control_block;
}
static bool is_in_guest(struct pt_regs *regs)
diff --git a/arch/s390/mm/extable.c b/arch/s390/mm/extable.c
index 8ac8ad2474a0..1e4d2187541a 100644
--- a/arch/s390/mm/extable.c
+++ b/arch/s390/mm/extable.c
@@ -1,6 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
+#include <linux/bitfield.h>
#include <linux/extable.h>
+#include <linux/string.h>
#include <linux/errno.h>
#include <linux/panic.h>
#include <asm/asm-extable.h>
@@ -24,9 +26,34 @@ static bool ex_handler_fixup(const struct exception_table_entry *ex, struct pt_r
return true;
}
-static bool ex_handler_uaccess(const struct exception_table_entry *ex, struct pt_regs *regs)
+static bool ex_handler_ua_store(const struct exception_table_entry *ex, struct pt_regs *regs)
{
- regs->gprs[ex->data] = -EFAULT;
+ unsigned int reg_err = FIELD_GET(EX_DATA_REG_ERR, ex->data);
+
+ regs->gprs[reg_err] = -EFAULT;
+ regs->psw.addr = extable_fixup(ex);
+ return true;
+}
+
+static bool ex_handler_ua_load_mem(const struct exception_table_entry *ex, struct pt_regs *regs)
+{
+ unsigned int reg_addr = FIELD_GET(EX_DATA_REG_ADDR, ex->data);
+ unsigned int reg_err = FIELD_GET(EX_DATA_REG_ERR, ex->data);
+ size_t len = FIELD_GET(EX_DATA_LEN, ex->data);
+
+ regs->gprs[reg_err] = -EFAULT;
+ memset((void *)regs->gprs[reg_addr], 0, len);
+ regs->psw.addr = extable_fixup(ex);
+ return true;
+}
+
+static bool ex_handler_ua_load_reg(const struct exception_table_entry *ex, struct pt_regs *regs)
+{
+ unsigned int reg_zero = FIELD_GET(EX_DATA_REG_ADDR, ex->data);
+ unsigned int reg_err = FIELD_GET(EX_DATA_REG_ERR, ex->data);
+
+ regs->gprs[reg_err] = -EFAULT;
+ regs->gprs[reg_zero] = 0;
regs->psw.addr = extable_fixup(ex);
return true;
}
@@ -43,8 +70,12 @@ bool fixup_exception(struct pt_regs *regs)
return ex_handler_fixup(ex, regs);
case EX_TYPE_BPF:
return ex_handler_bpf(ex, regs);
- case EX_TYPE_UACCESS:
- return ex_handler_uaccess(ex, regs);
+ case EX_TYPE_UA_STORE:
+ return ex_handler_ua_store(ex, regs);
+ case EX_TYPE_UA_LOAD_MEM:
+ return ex_handler_ua_load_mem(ex, regs);
+ case EX_TYPE_UA_LOAD_REG:
+ return ex_handler_ua_load_reg(ex, regs);
}
panic("invalid exception table entry");
}
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index 1ac73917a8d3..b8ae4a4aa2ba 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -2608,6 +2608,18 @@ static int __s390_enable_skey_pte(pte_t *pte, unsigned long addr,
return 0;
}
+/*
+ * Give a chance to schedule after setting a key to 256 pages.
+ * We only hold the mm lock, which is a rwsem and the kvm srcu.
+ * Both can sleep.
+ */
+static int __s390_enable_skey_pmd(pmd_t *pmd, unsigned long addr,
+ unsigned long next, struct mm_walk *walk)
+{
+ cond_resched();
+ return 0;
+}
+
static int __s390_enable_skey_hugetlb(pte_t *pte, unsigned long addr,
unsigned long hmask, unsigned long next,
struct mm_walk *walk)
@@ -2630,12 +2642,14 @@ static int __s390_enable_skey_hugetlb(pte_t *pte, unsigned long addr,
end = start + HPAGE_SIZE - 1;
__storage_key_init_range(start, end);
set_bit(PG_arch_1, &page->flags);
+ cond_resched();
return 0;
}
static const struct mm_walk_ops enable_skey_walk_ops = {
.hugetlb_entry = __s390_enable_skey_hugetlb,
.pte_entry = __s390_enable_skey_pte,
+ .pmd_entry = __s390_enable_skey_pmd,
};
int s390_enable_skey(void)
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 697df02362af..4909dcd762e8 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -748,7 +748,7 @@ void ptep_zap_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
pgste_val(pgste) |= PGSTE_GR_BIT | PGSTE_GC_BIT;
ptev = pte_val(*ptep);
if (!(ptev & _PAGE_INVALID) && (ptev & _PAGE_WRITE))
- page_set_storage_key(ptev & PAGE_MASK, PAGE_DEFAULT_KEY, 1);
+ page_set_storage_key(ptev & PAGE_MASK, PAGE_DEFAULT_KEY, 0);
pgste_set_unlock(ptep, pgste);
preempt_enable();
}
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-29 19:02:19 +0000