x86/sev: Introduce an SNP leaked pages list

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Pages are unsafe to be released back to the page-allocator if they
have been transitioned to firmware/guest state and can't be reclaimed
or transitioned back to hypervisor/shared state. In this case, add them
to an internal leaked pages list to ensure that they are not freed or
touched/accessed to cause fatal page faults.

  [ mdr: Relocate to arch/x86/virt/svm/sev.c ]

Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Link: https://lore.kernel.org/r/20240126041126.1927228-16-michael.roth@amd.com

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Ashish Kalra 2024-01-25 22:11:15 -06:00 • committed by Borislav Petkov (AMD)

parent 18085ac2f2

commit 8dac642999

2 changed files with 39 additions and 0 deletions

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arch/x86/include/asm/sev.h

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37

arch/x86/virt/svm/sev.c

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