[PATCH v7 53/72] x86/sev-es: Handle WBINVD Events

Joerg Roedel
2020-09-07T13:15:54Z

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

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

Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Adapt to #VC handling framework ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
 arch/x86/kernel/sev-es.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 7879fe640dcc..c51cb2673af6 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -847,6 +847,12 @@ static enum es_result vc_handle_dr7_read(struct ghcb *ghcb,
 	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)
@@ -869,6 +875,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
 	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;
--
2.28.0