x86/mm: Allow guest.enc_status_change_prepare() to fail

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[ Upstream commit 3f6819dd19 ]

TDX code is going to provide guest.enc_status_change_prepare() that is
able to fail. TDX will use the call to convert the GPA range from shared
to private. This operation can fail.

Add a way to return an error from the callback.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Link: https://lore.kernel.org/all/20230606095622.1939-2-kirill.shutemov%40linux.intel.com
Stable-dep-of: 195edce08b ("x86/tdx: Fix race between set_memory_encrypted() and load_unaligned_zeropad()")
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Kirill A. Shutemov 2023-06-06 12:56:20 +03:00 • committed by Greg Kroah-Hartman

parent 3e03681f07

commit c598fefef3

4 changed files with 7 additions and 4 deletions

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2

arch/x86/include/asm/x86_init.h

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2

arch/x86/kernel/x86_init.c

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4

arch/x86/mm/mem_encrypt_amd.c

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3

arch/x86/mm/pat/set_memory.c

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