From: Tom Lendacky <thomas.lendacky@amd.com>
Date: Mon, 7 Sep 2020 15:15:54 +0200
Subject: x86/sev-es: Handle WBINVD Events
Git-commit: a14a92fc4b420ae6713800a8ae8c3686c1a1fa20
Patch-mainline: v5.10-rc1
References: jsc#SLE-14337

Implement a handler for #VC exceptions caused by WBINVD instructions.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
[ jroedel@suse.de: Adapt to #VC handling framework ]
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/20200907131613.12703-54-joro@8bytes.org
---
 arch/x86/kernel/sev-es.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -849,6 +849,12 @@ static enum es_result vc_handle_dr7_read
 	return ES_OK;
 }
 
+static enum es_result vc_handle_wbinvd(struct ghcb *ghcb,
+				       struct es_em_ctxt *ctxt)
+{
+	return sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_WBINVD, 0, 0);
+}
+
 static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
 					 struct ghcb *ghcb,
 					 unsigned long exit_code)
@@ -871,6 +877,9 @@ static enum es_result vc_handle_exitcode
 	case SVM_EXIT_MSR:
 		result = vc_handle_msr(ghcb, ctxt);
 		break;
+	case SVM_EXIT_WBINVD:
+		result = vc_handle_wbinvd(ghcb, ctxt);
+		break;
 	case SVM_EXIT_NPF:
 		result = vc_handle_mmio(ghcb, ctxt);
 		break;