From: Tom Lendacky <thomas.lendacky@amd.com>
Date: Mon, 7 Sep 2020 13:15:57 +0000 (+0200)
Subject: x86/sev-es: Handle INVD Events
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8b4ce83707cb2cff5f6d175ea38f751ac4456096;p=linux.git

x86/sev-es: Handle INVD Events

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 <jroedel@suse.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-57-joro@8bytes.org
---

diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index b2d7287a99751..236cfc16f6962 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;