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authorLinus Torvalds <torvalds@linux-foundation.org>2022-12-16 13:46:41 -0600
committerLinus Torvalds <torvalds@linux-foundation.org>2022-12-16 13:46:41 -0600
commit77856d911a8c8724ee8e2b09d55979fc1de8f1c0 (patch)
treee895658d3ec29c6892ec20412765698c39ab3aa9 /arch
parentaa4800e31c547ed00681318335ca2298c4bca33a (diff)
parentc0cd1d541704c45030cbb2031612fdd68e8e15d5 (diff)
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon: - Fix Kconfig dependencies to re-allow the enabling of function graph tracer and shadow call stacks at the same time. - Revert the workaround for CPU erratum #2645198 since the CONFIG_ guards were incorrect and the code has therefore not seen any real exposure in -next. * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: Revert "arm64: errata: Workaround possible Cortex-A715 [ESR|FAR]_ELx corruption" ftrace: Allow WITH_ARGS flavour of graph tracer with shadow call stack
Diffstat (limited to 'arch')
-rw-r--r--arch/Kconfig2
-rw-r--r--arch/arm64/Kconfig16
-rw-r--r--arch/arm64/include/asm/hugetlb.h9
-rw-r--r--arch/arm64/include/asm/pgtable.h9
-rw-r--r--arch/arm64/kernel/cpu_errata.c7
-rw-r--r--arch/arm64/mm/hugetlbpage.c21
-rw-r--r--arch/arm64/mm/mmu.c21
-rw-r--r--arch/arm64/tools/cpucaps1
8 files changed, 1 insertions, 85 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index a3c47c2a79cd..12e3ddabac9d 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -638,7 +638,7 @@ config ARCH_SUPPORTS_SHADOW_CALL_STACK
config SHADOW_CALL_STACK
bool "Shadow Call Stack"
depends on ARCH_SUPPORTS_SHADOW_CALL_STACK
- depends on DYNAMIC_FTRACE_WITH_REGS || !FUNCTION_GRAPH_TRACER
+ depends on DYNAMIC_FTRACE_WITH_ARGS || DYNAMIC_FTRACE_WITH_REGS || !FUNCTION_GRAPH_TRACER
help
This option enables the compiler's Shadow Call Stack, which
uses a shadow stack to protect function return addresses from
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index cf6d1cd8b6dc..03934808b2ed 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -972,22 +972,6 @@ config ARM64_ERRATUM_2457168
If unsure, say Y.
-config ARM64_ERRATUM_2645198
- bool "Cortex-A715: 2645198: Workaround possible [ESR|FAR]_ELx corruption"
- default y
- help
- This option adds the workaround for ARM Cortex-A715 erratum 2645198.
-
- If a Cortex-A715 cpu sees a page mapping permissions change from executable
- to non-executable, it may corrupt the ESR_ELx and FAR_ELx registers on the
- next instruction abort caused by permission fault.
-
- Only user-space does executable to non-executable permission transition via
- mprotect() system call. Workaround the problem by doing a break-before-make
- TLB invalidation, for all changes to executable user space mappings.
-
- If unsure, say Y.
-
config CAVIUM_ERRATUM_22375
bool "Cavium erratum 22375, 24313"
default y
diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h
index 6a4a1ab8eb23..d20f5da2d76f 100644
--- a/arch/arm64/include/asm/hugetlb.h
+++ b/arch/arm64/include/asm/hugetlb.h
@@ -49,15 +49,6 @@ extern pte_t huge_ptep_get(pte_t *ptep);
void __init arm64_hugetlb_cma_reserve(void);
-#define huge_ptep_modify_prot_start huge_ptep_modify_prot_start
-extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep);
-
-#define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit
-extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep,
- pte_t old_pte, pte_t new_pte);
-
#include <asm-generic/hugetlb.h>
#endif /* __ASM_HUGETLB_H */
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 6914add66bcf..b4bbeed80fb6 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -1093,15 +1093,6 @@ static inline bool pud_sect_supported(void)
}
-#define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
-#define ptep_modify_prot_start ptep_modify_prot_start
-extern pte_t ptep_modify_prot_start(struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep);
-
-#define ptep_modify_prot_commit ptep_modify_prot_commit
-extern void ptep_modify_prot_commit(struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep,
- pte_t old_pte, pte_t new_pte);
#endif /* !__ASSEMBLY__ */
#endif /* __ASM_PGTABLE_H */
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 307faa2b4395..89ac00084f38 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -661,13 +661,6 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
CAP_MIDR_RANGE_LIST(trbe_write_out_of_range_cpus),
},
#endif
-#ifdef CONFIG_ARM64_ERRATUM_2645198
- {
- .desc = "ARM erratum 2645198",
- .capability = ARM64_WORKAROUND_2645198,
- ERRATA_MIDR_ALL_VERSIONS(MIDR_CORTEX_A715)
- },
-#endif
#ifdef CONFIG_ARM64_ERRATUM_2077057
{
.desc = "ARM erratum 2077057",
diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index cd8d96e1fa1a..35e9a468d13e 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -559,24 +559,3 @@ bool __init arch_hugetlb_valid_size(unsigned long size)
{
return __hugetlb_valid_size(size);
}
-
-pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
- if (IS_ENABLED(CONFIG_ARM64_WORKAROUND_2645198) &&
- cpus_have_const_cap(ARM64_WORKAROUND_2645198)) {
- /*
- * Break-before-make (BBM) is required for all user space mappings
- * when the permission changes from executable to non-executable
- * in cases where cpu is affected with errata #2645198.
- */
- if (pte_user_exec(READ_ONCE(*ptep)))
- return huge_ptep_clear_flush(vma, addr, ptep);
- }
- return huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
-}
-
-void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep,
- pte_t old_pte, pte_t pte)
-{
- set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
-}
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 12915f379c22..14c87e8d69d8 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -1630,24 +1630,3 @@ static int __init prevent_bootmem_remove_init(void)
}
early_initcall(prevent_bootmem_remove_init);
#endif
-
-pte_t ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
- if (IS_ENABLED(CONFIG_ARM64_WORKAROUND_2645198) &&
- cpus_have_const_cap(ARM64_WORKAROUND_2645198)) {
- /*
- * Break-before-make (BBM) is required for all user space mappings
- * when the permission changes from executable to non-executable
- * in cases where cpu is affected with errata #2645198.
- */
- if (pte_user_exec(READ_ONCE(*ptep)))
- return ptep_clear_flush(vma, addr, ptep);
- }
- return ptep_get_and_clear(vma->vm_mm, addr, ptep);
-}
-
-void ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep,
- pte_t old_pte, pte_t pte)
-{
- set_pte_at(vma->vm_mm, addr, ptep, pte);
-}
diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps
index dfeb2c51e257..a86ee376920a 100644
--- a/arch/arm64/tools/cpucaps
+++ b/arch/arm64/tools/cpucaps
@@ -71,7 +71,6 @@ WORKAROUND_2038923
WORKAROUND_2064142
WORKAROUND_2077057
WORKAROUND_2457168
-WORKAROUND_2645198
WORKAROUND_2658417
WORKAROUND_TRBE_OVERWRITE_FILL_MODE
WORKAROUND_TSB_FLUSH_FAILURE