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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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