6.12-stable review patch. If anyone has any objections, please let me know.
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From: Tom Lendacky thomas.lendacky@amd.com
commit 3ee9cebd0a5e7ea47eb35cec95eaa1a866af982d upstream.
In order to support future versions of the SVSM_CORE_PVALIDATE call, all reserved fields within a PVALIDATE entry must be set to zero as an SVSM should be ensuring all reserved fields are zero in order to support future usage of reserved areas based on the protocol version.
Fixes: fcd042e86422 ("x86/sev: Perform PVALIDATE using the SVSM when not at VMPL0") Signed-off-by: Tom Lendacky thomas.lendacky@amd.com Signed-off-by: Borislav Petkov (AMD) bp@alien8.de Reviewed-by: Joerg Roedel joerg.roedel@amd.com Cc: stable@kernel.org Link: https://lore.kernel.org/7cde412f8b057ea13a646fb166b1ca023f6a5031.1755098819.... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/x86/coco/sev/shared.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/arch/x86/coco/sev/shared.c +++ b/arch/x86/coco/sev/shared.c @@ -1285,6 +1285,7 @@ static void svsm_pval_4k_page(unsigned l pc->entry[0].page_size = RMP_PG_SIZE_4K; pc->entry[0].action = validate; pc->entry[0].ignore_cf = 0; + pc->entry[0].rsvd = 0; pc->entry[0].pfn = paddr >> PAGE_SHIFT;
/* Protocol 0, Call ID 1 */ @@ -1373,6 +1374,7 @@ static u64 svsm_build_ca_from_pfn_range( pe->page_size = RMP_PG_SIZE_4K; pe->action = action; pe->ignore_cf = 0; + pe->rsvd = 0; pe->pfn = pfn;
pe++; @@ -1403,6 +1405,7 @@ static int svsm_build_ca_from_psc_desc(s pe->page_size = e->pagesize ? RMP_PG_SIZE_2M : RMP_PG_SIZE_4K; pe->action = e->operation == SNP_PAGE_STATE_PRIVATE; pe->ignore_cf = 0; + pe->rsvd = 0; pe->pfn = e->gfn;
pe++;