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| author | Maxime Ripard <mripard@kernel.org> | 2025-08-20 16:08:49 +0200 |
|---|---|---|
| committer | Maxime Ripard <mripard@kernel.org> | 2025-08-20 16:08:49 +0200 |
| commit | 1a2cf179e2973f6801c67397ecc987391b084bcf (patch) | |
| tree | 9212405e147d9750d493f9f785afdb2769a263c7 /arch/x86/coco/sev/core.c | |
| parent | 3271faf42d135bcf569c3ff6af55c21858eec212 (diff) | |
| parent | c17b750b3ad9f45f2b6f7e6f7f4679844244f0b9 (diff) | |
Merge drm/drm-fixes into drm-misc-fixes
Update drm-misc-fixes to -rc2.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Diffstat (limited to 'arch/x86/coco/sev/core.c')
| -rw-r--r-- | arch/x86/coco/sev/core.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c index fc59ce78c477..14ef5908fb27 100644 --- a/arch/x86/coco/sev/core.c +++ b/arch/x86/coco/sev/core.c @@ -227,6 +227,7 @@ static u64 svsm_build_ca_from_pfn_range(u64 pfn, u64 pfn_end, bool action, pe->page_size = RMP_PG_SIZE_4K; pe->action = action; pe->ignore_cf = 0; + pe->rsvd = 0; pe->pfn = pfn; pe++; @@ -257,6 +258,7 @@ static int svsm_build_ca_from_psc_desc(struct snp_psc_desc *desc, unsigned int d 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++; @@ -358,10 +360,31 @@ static void svsm_pval_pages(struct snp_psc_desc *desc) static void pvalidate_pages(struct snp_psc_desc *desc) { + struct psc_entry *e; + unsigned int i; + if (snp_vmpl) svsm_pval_pages(desc); else pval_pages(desc); + + /* + * If not affected by the cache-coherency vulnerability there is no need + * to perform the cache eviction mitigation. + */ + if (cpu_feature_enabled(X86_FEATURE_COHERENCY_SFW_NO)) + return; + + for (i = 0; i <= desc->hdr.end_entry; i++) { + e = &desc->entries[i]; + + /* + * If validating memory (making it private) perform the cache + * eviction mitigation. + */ + if (e->operation == SNP_PAGE_STATE_PRIVATE) + sev_evict_cache(pfn_to_kaddr(e->gfn), e->pagesize ? 512 : 1); + } } static int vmgexit_psc(struct ghcb *ghcb, struct snp_psc_desc *desc) |