1 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
2 From: Tom Lendacky <thomas.lendacky@amd.com>
3 Date: Wed, 20 Dec 2017 10:55:47 +0000
4 Subject: [PATCH] x86/svm: Add code to clobber the RSB on VM exit
6 Content-Type: text/plain; charset=UTF-8
7 Content-Transfer-Encoding: 8bit
12 Add code to overwrite the local CPU RSB entries from the previous less
15 Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
16 Signed-off-by: Andy Whitcroft <apw@canonical.com>
17 Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
18 (cherry picked from commit 9392e24469b71ff665cdbc3d81db215f9383219d)
19 Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
21 arch/x86/kvm/svm.c | 2 ++
22 1 file changed, 2 insertions(+)
24 diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
25 index fade4869856a..e99bdfcc6b01 100644
26 --- a/arch/x86/kvm/svm.c
27 +++ b/arch/x86/kvm/svm.c
28 @@ -5008,6 +5008,8 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
29 wrmsrl(MSR_IA32_SPEC_CTRL, FEATURE_ENABLE_IBRS);
35 wrmsrl(MSR_GS_BASE, svm->host.gs_base);