Thread (83 messages) 83 messages, 3 authors, 2020-09-08
STALE1963d
Revisions (6)
  1. v2 [diff vs current]
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  5. v6 [diff vs current]
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[PATCH v7 56/72] x86/sev-es: Handle INVD Events

From: Joerg Roedel <joro@8bytes.org>
Date: 2020-09-07 17:26:53
Also in: kvm, lkml
Subsystem: the rest, x86 architecture (32-bit and 64-bit) · Maintainers: Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen

From: Tom Lendacky <thomas.lendacky@amd.com>

Implement a handler for #VC exceptions caused by INVD instructions.
Since Linux should never use INVD, just mark it as unsupported.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
[ jroedel@suse.de: Adapt to #VC handling infrastructure ]
Co-developed-by: Joerg Roedel <redacted>
Signed-off-by: Joerg Roedel <redacted>
---
 arch/x86/kernel/sev-es.c | 4 ++++
 1 file changed, 4 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 2ee600f3184b..7fb17e71ff05 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -892,6 +892,10 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
 	case SVM_EXIT_RDPMC:
 		result = vc_handle_rdpmc(ghcb, ctxt);
 		break;
+	case SVM_EXIT_INVD:
+		pr_err_ratelimited("#VC exception for INVD??? Seriously???\n");
+		result = ES_UNSUPPORTED;
+		break;
 	case SVM_EXIT_CPUID:
 		result = vc_handle_cpuid(ghcb, ctxt);
 		break;
-- 
2.28.0

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