x86/sev-es: Handle WBINVD Events

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

diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 391b9c7f73128415702325dd111bf4fc6da535ab..aba27c3c1633589d1fc8512fa80851b71dc52033 100644 (file)
--- 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;