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KVM: Fix guest register corruption on paravirt hypercall 

The hypercall code mixes up the ->cache_regs() and ->decache_regs()
callbacks, resulting in guest register corruption.

Signed-off-by: Dor Laor <dor.laor@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
hifive-unleashed-5.1
Dor Laor 2007-02-19 16:44:49 +02:00 committed by Avi Kivity
parent dc87c3985e
commit 9b22bf5783
1 changed files with 2 additions and 2 deletions
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4
drivers/kvm/kvm_main.c
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@ -1177,7 +1177,7 @@ int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run)
{
unsigned long nr, a0, a1, a2, a3, a4, a5, ret;
kvm_arch_ops->decache_regs(vcpu);
kvm_arch_ops->cache_regs(vcpu);
ret = -KVM_EINVAL;
#ifdef CONFIG_X86_64
if (is_long_mode(vcpu)) {
@ -1204,7 +1204,7 @@ int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run)
;
}
vcpu->regs[VCPU_REGS_RAX] = ret;
kvm_arch_ops->cache_regs(vcpu);
kvm_arch_ops->decache_regs(vcpu);
return 1;
}
EXPORT_SYMBOL_GPL(kvm_hypercall);