lkml.org 
[lkml]   [2009]   [Aug]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 16/21] kvm/svm: handle errors in vmrun emulation path appropriatly
Date
If nested svm fails to load the msrpm the vmrun succeeds with the old
msrpm which is not correct. This patch changes the logic to roll back
to host mode in case the msrpm cannot be loaded.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/kvm/svm.c | 14 +++++++++++++-
1 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 63d2f63..cad7582 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1880,6 +1880,7 @@ static int vmsave_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
static int vmrun_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
{
nsvm_printk("VMrun\n");
+
if (nested_svm_check_permissions(svm))
return 1;

@@ -1890,7 +1891,18 @@ static int vmrun_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
return 1;

if (!nested_svm_vmrun_msrpm(svm))
- return 1;
+ goto failed;
+
+ return 1;
+
+failed:
+
+ svm->vmcb->control.exit_code = SVM_EXIT_ERR;
+ svm->vmcb->control.exit_code_hi = 0;
+ svm->vmcb->control.exit_info_1 = 0;
+ svm->vmcb->control.exit_info_2 = 0;
+
+ nested_svm_vmexit(svm);

return 1;
}
--
1.6.3.3



\
 
 \ /
  Last update: 2009-08-07 11:57    [W:0.127 / U:0.664 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site