linux-kernel - [tip: x86/seves] x86/sev-es: Handle INVD Events

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Message-ID: <159972972887.20229.4347569173529097534.tip-bot2@tip-bot2>
Date:   Thu, 10 Sep 2020 09:22:08 -0000
From:   "tip-bot2 for Tom Lendacky" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Tom Lendacky <thomas.lendacky@....com>,
        Joerg Roedel <jroedel@...e.de>, Borislav Petkov <bp@...e.de>,
        x86 <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [tip: x86/seves] x86/sev-es: Handle INVD Events

The following commit has been merged into the x86/seves branch of tip:

Commit-ID:     8b4ce83707cb2cff5f6d175ea38f751ac4456096
Gitweb:        https://git.kernel.org/tip/8b4ce83707cb2cff5f6d175ea38f751ac4456096
Author:        Tom Lendacky <thomas.lendacky@....com>
AuthorDate:    Mon, 07 Sep 2020 15:15:57 +02:00
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Wed, 09 Sep 2020 11:33:20 +02:00

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@....com>
[ jroedel@...e.de: Adapt to #VC handling infrastructure ]
Co-developed-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-57-joro@8bytes.org
---
 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 b2d7287..236cfc1 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;