Reset the vcpu->run->flags at the beginning of kvm_arch_vcpu_ioctl_run.
It can avoid every thunk of code that needs to set the flag clear it,
which increases the odds of missing a case and ending up with a flag in
an undefined state.
Signed-off-by: Chenyi Qiang <chenyi.qiang@xxxxxxxxx>
---
arch/x86/kvm/x86.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f5ede41bf9e6..bd239cab0a1a 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8119,12 +8119,14 @@ static void post_kvm_run_save(struct kvm_vcpu *vcpu)
struct kvm_run *kvm_run = vcpu->run;
kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
- kvm_run->flags = is_smm(vcpu) ? KVM_RUN_X86_SMM : 0;
kvm_run->cr8 = kvm_get_cr8(vcpu);
kvm_run->apic_base = kvm_get_apic_base(vcpu);
kvm_run->ready_for_interrupt_injection =
pic_in_kernel(vcpu->kvm) ||
kvm_vcpu_ready_for_interrupt_injection(vcpu);
+
+ if (is_smm(vcpu))
+ kvm_run->flags |= KVM_RUN_X86_SMM;
}
static void update_cr8_intercept(struct kvm_vcpu *vcpu)
@@ -9216,6 +9218,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
vcpu_load(vcpu);
kvm_sigset_activate(vcpu);
+ kvm_run->flags = 0;
kvm_load_guest_fpu(vcpu);
if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
--
2.17.1
