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EFI fix

GIT PULL Ingo Molnar 1 participant 1 message Jul 30, 2018

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Linus,

Please pull the latest efi-urgent-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git efi-urgent-for-linus

# HEAD: 9b788f32bee6b0b293a4bdfca4ad4bb0206407fb x86/efi: Access EFI MMIO data as unencrypted when SEV is active

An UEFI variables fix for SEV guests.

Thanks,

Ingo

------------------>
Brijesh Singh (1):
x86/efi: Access EFI MMIO data as unencrypted when SEV is active

 arch/x86/platform/efi/efi_64.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
arch/x86/platform/efi/efi_64.c +1 -1
index 77873ce700ae..5f2eb3231607 100644
@@ -417,7 +417,7 @@ static void __init __map_region(efi_memory_desc_t *md, u64 va)
 	if (!(md->attribute & EFI_MEMORY_WB))
 		flags |= _PAGE_PCD;
 
-	if (sev_active())
+	if (sev_active() && md->type != EFI_MEMORY_MAPPED_IO)
 		flags |= _PAGE_ENC;
 
 	pfn = md->phys_addr >> PAGE_SHIFT;