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authorHuaitong Han <huaitong.han@intel.com>2016-01-12 08:04:20 (GMT)
committerPaolo Bonzini <pbonzini@redhat.com>2016-01-12 10:42:16 (GMT)
commit45bdbcfdf241149642fb6c25ab0c209d59c371b7 (patch)
tree51e626bec2fee316a1e5cd61873c26cb725e1ab0 /arch/x86/kvm
parentac3e5fcae8ca658e7dcc3fdcd50af7e4779f58c1 (diff)
downloadlinux-45bdbcfdf241149642fb6c25ab0c209d59c371b7.tar.xz
kvm: x86: Fix vmwrite to SECONDARY_VM_EXEC_CONTROL
vmx_cpuid_tries to update SECONDARY_VM_EXEC_CONTROL in the VMCS, but it will cause a vmwrite error on older CPUs because the code does not check for the presence of CPU_BASED_ACTIVATE_SECONDARY_CONTROLS. This will get rid of the following trace on e.g. Core2 6600: vmwrite error: reg 401e value 10 (err 12) Call Trace: [<ffffffff8116e2b9>] dump_stack+0x40/0x57 [<ffffffffa020b88d>] vmx_cpuid_update+0x5d/0x150 [kvm_intel] [<ffffffffa01d8fdc>] kvm_vcpu_ioctl_set_cpuid2+0x4c/0x70 [kvm] [<ffffffffa01b8363>] kvm_arch_vcpu_ioctl+0x903/0xfa0 [kvm] Fixes: feda805fe7c4ed9cf78158e73b1218752e3b4314 Cc: stable@vger.kernel.org Reported-by: Zdenek Kaspar <zkaspar82@gmail.com> Signed-off-by: Huaitong Han <huaitong.han@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
-rw-r--r--arch/x86/kvm/vmx.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 62d958a..be3f1735 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -8989,7 +8989,8 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
best->ebx &= ~bit(X86_FEATURE_INVPCID);
}
- vmcs_set_secondary_exec_control(secondary_exec_ctl);
+ if (cpu_has_secondary_exec_ctrls())
+ vmcs_set_secondary_exec_control(secondary_exec_ctl);
if (static_cpu_has(X86_FEATURE_PCOMMIT) && nested) {
if (guest_cpuid_has_pcommit(vcpu))