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authorAvi Kivity <avi@qumranet.com>2007-02-28 13:46:53 -0500
committerAvi Kivity <avi@qumranet.com>2007-05-03 03:52:23 -0400
commit06465c5a3aa9948a7b00af49cd22ed8f235cdb0f (patch)
tree2a21941ae6f28445abbb3cc80dd3416cf2241b8d /drivers/kvm/vmx.c
parent46fc1477887c41c8e900f2c95485e222b9a54822 (diff)
KVM: Handle cpuid in the kernel instead of punting to userspace
KVM used to handle cpuid by letting userspace decide what values to return to the guest. We now handle cpuid completely in the kernel. We still let userspace decide which values the guest will see by having userspace set up the value table beforehand (this is necessary to allow management software to set the cpu features to the least common denominator, so that live migration can work). The motivation for the change is that kvm kernel code can be impacted by cpuid features, for example the x86 emulator. Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/vmx.c')
-rw-r--r--drivers/kvm/vmx.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 4d5f40fcb651..71410a65bb90 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1585,8 +1585,8 @@ static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1585 1585
1586static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) 1586static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1587{ 1587{
1588 kvm_run->exit_reason = KVM_EXIT_CPUID; 1588 kvm_emulate_cpuid(vcpu);
1589 return 0; 1589 return 1;
1590} 1590}
1591 1591
1592static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) 1592static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)