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x86/sgx: Add hook to error injection address validation

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SGX reserved memory does not appear in the standard address maps.

Add hook to call into the SGX code to check if an address is located
in SGX memory.

There are other challenges in injecting errors into SGX. Update the
documentation with a sequence of operations to inject.

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>
Tested-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lkml.kernel.org/r/20211026220050.697075-7-tony.luck@intel.com
This commit is contained in:
Tony Luck
2021-10-26 15:00:49 -07:00
committed by Dave Hansen
parent 03b122da74
commit c6acb1e7bf
2 changed files with 21 additions and 1 deletions
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3
drivers/acpi/apei/einj.c
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@@ -545,7 +545,8 @@ static int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
((region_intersects(base_addr, size, IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)
!= REGION_INTERSECTS) &&
(region_intersects(base_addr, size, IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY)
!= REGION_INTERSECTS)))
!= REGION_INTERSECTS) &&
!arch_is_platform_page(base_addr)))
return -EINVAL;
inject: