linux

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Brijesh Singh 9b788f32be x86/efi: Access EFI MMIO data as unencrypted when SEV is active

SEV guest fails to update the UEFI runtime variables stored in the
flash.

The following commit:

  1379edd59673 ("x86/efi: Access EFI data as encrypted when SEV is active")

unconditionally maps all the UEFI runtime data as 'encrypted' (C=1).

When SEV is active the UEFI runtime data marked as EFI_MEMORY_MAPPED_IO
should be mapped as 'unencrypted' so that both guest and hypervisor can
access the data.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Cc: <stable@vger.kernel.org> # 4.15.x
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Fixes: 1379edd59673 ("x86/efi: Access EFI data as encrypted ...")
Link: http://lkml.kernel.org/r/20180720012846.23560-2-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2018-07-22 14:10:38 +02:00

atom

x86/platform/atom: Re-use DEFINE_SHOW_ATTRIBUTE() macro

2018-02-16 10:10:14 +01:00

ce4100

x86/init: Remove i8042_detect() from platform ops

2016-12-19 11:34:15 +01:00

efi

x86/efi: Access EFI MMIO data as unencrypted when SEV is active

2018-07-22 14:10:38 +02:00

geode

x86/platform: Make platform/geode/net5501.c explicitly non-modular