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| author | Avi Kivity <avi@qumranet.com> | 2007-10-09 14:12:19 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-10-22 14:03:28 +0400 |
| commit | 1b6269db3f83396c2fd2c8d0f3e0f37ac0e6ba05 (patch) | |
| tree | a8e99f6f6690e2024b9a08096a61d884b57dc8bc /drivers | |
| parent | 7f2145ad6f3e7060147a2a4c4db35c641ff61b5c (diff) | |
| download | linux-1b6269db3f83396c2fd2c8d0f3e0f37ac0e6ba05.tar.xz | |
KVM: VMX: Handle NMIs before enabling interrupts and preemption
This makes sure we handle NMI on the current cpu, and that we don't service
maskable interrupts before non-maskable ones.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/kvm/vmx.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index 4f115a8e45ef..bcc1e398a976 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -1760,10 +1760,8 @@ static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary); } - if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) { /* nmi */ - asm ("int $2"); - return 1; - } + if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ + return 1; /* already handled by vmx_vcpu_run() */ if (is_no_device(intr_info)) { vmx_fpu_activate(vcpu); @@ -2196,6 +2194,7 @@ static void vmx_intr_assist(struct kvm_vcpu *vcpu) static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) { struct vcpu_vmx *vmx = to_vmx(vcpu); + u32 intr_info; /* * Loading guest fpu may have cleared host cr0.ts @@ -2322,6 +2321,12 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) asm ("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); vmx->launched = 1; + + intr_info = vmcs_read32(VM_EXIT_INTR_INFO); + + /* We need to handle NMIs before interrupts are enabled */ + if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ + asm("int $2"); } static void vmx_inject_page_fault(struct kvm_vcpu *vcpu, |