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| author | Avi Kivity <avi@redhat.com> | 2011-03-08 17:09:51 +0300 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2011-03-17 19:08:33 +0300 |
| commit | 831ca6093ca486060721f5c3c74f97b10f3172b9 (patch) | |
| tree | cdd06aaa0b11787f2e579a1e60eadfe4dd94d85a | |
| parent | afc20184b7d24693a934f652e135598a497c9448 (diff) | |
| download | linux-831ca6093ca486060721f5c3c74f97b10f3172b9.tar.xz | |
KVM: SVM: Load %gs earlier if CONFIG_X86_32_LAZY_GS=n
With CONFIG_CC_STACKPROTECTOR, we need a valid %gs at all times, so disable
lazy reload and do an eager reload immediately after the vmexit.
Reported-by: IVAN ANGELOV <ivangotoy@gmail.com>
Acked-By: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/svm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 8d61df4a02c7..6bb15d583e47 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1155,8 +1155,10 @@ static void svm_vcpu_put(struct kvm_vcpu *vcpu) wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs); load_gs_index(svm->host.gs); #else +#ifdef CONFIG_X86_32_LAZY_GS loadsegment(gs, svm->host.gs); #endif +#endif for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]); } @@ -3649,6 +3651,9 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu) wrmsrl(MSR_GS_BASE, svm->host.gs_base); #else loadsegment(fs, svm->host.fs); +#ifndef CONFIG_X86_32_LAZY_GS + loadsegment(gs, svm->host.gs); +#endif #endif reload_tss(vcpu); |