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linux/arch/x86/platform
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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:

  1379edd596 ("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: 1379edd596 ("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 2016-02-16 09:11:09 +01:00
goldfish x86/platform/goldfish: Prevent unconditional loading 2017-02-15 08:49:58 -08:00
intel x86/platform/intel/iosf_mbi: Add unlocked PMIC bus access notifier unregister 2017-11-10 13:14:02 +01:00
intel-mid x86: Convert x86_platform_ops to timespec64 2018-05-19 14:03:14 +02:00
intel-quark x86/platform/quark: Re-use DEFINE_SHOW_ATTRIBUTE() macro 2018-02-16 10:10:14 +01:00
iris x86: platform: iris: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
olpc License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
scx200 X86: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
sfi x86: Cleanup irq_domain ops 2015-04-24 15:36:55 +02:00
ts5500 x86/platform: Delete extraneous MODULE_* tags fromm ts5500 2016-07-16 22:41:00 +02:00
uv treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00