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From:   Joerg Roedel <joro@8bytes.org>
To:     x86@kernel.org
Cc:     Joerg Roedel <joro@8bytes.org>, Joerg Roedel <jroedel@suse.de>,
        Tom Lendacky <thomas.lendacky@amd.com>, hpa@zytor.com,
        Andy Lutomirski <luto@kernel.org>,
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        Cfir Cohen <cfir@google.com>,
        Erdem Aktas <erdemaktas@google.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
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        Martin Radev <martin.b.radev@gmail.com>,
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Subject: [PATCH v4 58/75] x86/sev-es: Handle INVD Events
Date:   Tue, 14 Jul 2020 14:09:00 +0200
Message-Id: <20200714120917.11253-59-joro@8bytes.org>
In-Reply-To: <20200714120917.11253-1-joro@8bytes.org>
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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 <jroedel@suse.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 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 6258bc8074fd..30d6161deada 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -898,6 +898,10 @@ 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;
-- 
2.27.0