diff options
| -rw-r--r-- | arch/x86/include/asm/processor.h | 8 | ||||
| -rw-r--r-- | arch/x86/include/asm/set_memory.h | 4 | ||||
| -rw-r--r-- | include/linux/mm.h | 13 | ||||
| -rw-r--r-- | mm/memory-failure.c | 19 |
4 files changed, 38 insertions, 6 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 355d38c0cf60..2c5f12ae7d04 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -855,4 +855,12 @@ enum mds_mitigations { MDS_MITIGATION_VMWERV, }; +#ifdef CONFIG_X86_SGX +int arch_memory_failure(unsigned long pfn, int flags); +#define arch_memory_failure arch_memory_failure + +bool arch_is_platform_page(u64 paddr); +#define arch_is_platform_page arch_is_platform_page +#endif + #endif /* _ASM_X86_PROCESSOR_H */ diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h index 872617542bbc..ff0f2d90338a 100644 --- a/arch/x86/include/asm/set_memory.h +++ b/arch/x86/include/asm/set_memory.h @@ -2,6 +2,7 @@ #ifndef _ASM_X86_SET_MEMORY_H #define _ASM_X86_SET_MEMORY_H +#include <linux/mm.h> #include <asm/page.h> #include <asm-generic/set_memory.h> @@ -99,6 +100,9 @@ static inline int set_mce_nospec(unsigned long pfn, bool unmap) unsigned long decoy_addr; int rc; + /* SGX pages are not in the 1:1 map */ + if (arch_is_platform_page(pfn << PAGE_SHIFT)) + return 0; /* * We would like to just call: * set_memory_XX((unsigned long)pfn_to_kaddr(pfn), 1); diff --git a/include/linux/mm.h b/include/linux/mm.h index a7e4a9e7d807..57f1aa2a33b6 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3231,6 +3231,19 @@ extern void shake_page(struct page *p); extern atomic_long_t num_poisoned_pages __read_mostly; extern int soft_offline_page(unsigned long pfn, int flags); +#ifndef arch_memory_failure +static inline int arch_memory_failure(unsigned long pfn, int flags) +{ + return -ENXIO; +} +#endif + +#ifndef arch_is_platform_page +static inline bool arch_is_platform_page(u64 paddr) +{ + return false; +} +#endif /* * Error handlers for various types of pages. diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 07c875fdeaf0..fddee33bc6cb 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1651,21 +1651,28 @@ int memory_failure(unsigned long pfn, int flags) if (!sysctl_memory_failure_recovery) panic("Memory failure on page %lx", pfn); + mutex_lock(&mf_mutex); + p = pfn_to_online_page(pfn); if (!p) { + res = arch_memory_failure(pfn, flags); + if (res == 0) + goto unlock_mutex; + if (pfn_valid(pfn)) { pgmap = get_dev_pagemap(pfn, NULL); - if (pgmap) - return memory_failure_dev_pagemap(pfn, flags, - pgmap); + if (pgmap) { + res = memory_failure_dev_pagemap(pfn, flags, + pgmap); + goto unlock_mutex; + } } pr_err("Memory failure: %#lx: memory outside kernel control\n", pfn); - return -ENXIO; + res = -ENXIO; + goto unlock_mutex; } - mutex_lock(&mf_mutex); - try_again: if (PageHuge(p)) { res = memory_failure_hugetlb(pfn, flags); |