lkml.org 
[lkml]   [2020]   [Feb]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 43/62] x86/sev-es: Handle WBINVD Events
Date
From: Tom Lendacky <thomas.lendacky@amd.com>

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>
---
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 fcd67ab04d2d..491537b770fd 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -266,6 +266,12 @@ static enum es_result handle_dr7_read(struct ghcb *ghcb,
return ES_OK;
}

+static enum es_result handle_wbinvd(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ return ghcb_hv_call(ghcb, ctxt, SVM_EXIT_WBINVD, 0, 0);
+}
+
static enum es_result handle_vc_exception(struct es_em_ctxt *ctxt,
struct ghcb *ghcb,
unsigned long exit_code,
@@ -289,6 +295,9 @@ static enum es_result handle_vc_exception(struct es_em_ctxt *ctxt,
case SVM_EXIT_MSR:
result = handle_msr(ghcb, ctxt);
break;
+ case SVM_EXIT_WBINVD:
+ result = handle_wbinvd(ghcb, ctxt);
+ break;
case SVM_EXIT_NPF:
result = handle_mmio(ghcb, ctxt);
break;
--
2.17.1
\
 
 \ /
  Last update: 2020-02-11 14:56    [W:0.234 / U:3.864 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site