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x86/sgx: Hook arch_memory_failure() into mainline code

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Add a call inside memory_failure() to call the arch specific code
to check if the address is an SGX EPC page and handle it.

Note the SGX EPC pages do not have a "struct page" entry, so the hook
goes in at the same point as the device mapping hook.

Pull the call to acquire the mutex earlier so the SGX errors are also
protected.

Make set_mce_nospec() skip SGX pages when trying to adjust
the 1:1 map.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Tested-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lkml.kernel.org/r/20211026220050.697075-6-tony.luck@intel.com
This commit is contained in:
Tony Luck 2021-10-26 15:00:48 -07:00 • committed by Dave Hansen
parent a495cbdffa
commit 03b122da74
4 changed files with 38 additions and 6 deletions
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8
arch/x86/include/asm/processor.h
View file

@ -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 */