diff options
| author | He, Qing <qing.he@intel.com> | 2007-08-02 15:03:07 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-10-13 12:18:25 +0400 |
| commit | c52fb35a8b5dada749d35fbe15ac1f9857b22896 (patch) | |
| tree | f3df58816b72f208cbf5bc734d3754d9435a632a /drivers/kvm | |
| parent | 6ceb9d791eeeb0a5493958f5d6d4dc7d91e59cf7 (diff) | |
| download | linux-c52fb35a8b5dada749d35fbe15ac1f9857b22896.tar.xz | |
KVM: Bypass irq_pending get/set when using in kernel irqchip
vcpu->irq_pending is saved in get/set_sreg IOCTL, but when in-kernel
local APIC is used, doing this may occasionally overwrite vcpu->apic to
an invalid value, as in the vm restore path.
Signed-off-by: Qing He <qing.he@intel.com>
Diffstat (limited to 'drivers/kvm')
| -rw-r--r-- | drivers/kvm/kvm_main.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 6e2c5f3f33fb..c270e4afd3fd 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -2145,8 +2145,12 @@ static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, sregs->efer = vcpu->shadow_efer; sregs->apic_base = kvm_get_apic_base(vcpu); - memcpy(sregs->interrupt_bitmap, vcpu->irq_pending, - sizeof sregs->interrupt_bitmap); + if (irqchip_in_kernel(vcpu->kvm)) + memset(sregs->interrupt_bitmap, 0, + sizeof sregs->interrupt_bitmap); + else + memcpy(sregs->interrupt_bitmap, vcpu->irq_pending, + sizeof sregs->interrupt_bitmap); vcpu_put(vcpu); @@ -2200,12 +2204,14 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, if (mmu_reset_needed) kvm_mmu_reset_context(vcpu); - memcpy(vcpu->irq_pending, sregs->interrupt_bitmap, - sizeof vcpu->irq_pending); - vcpu->irq_summary = 0; - for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i) - if (vcpu->irq_pending[i]) - __set_bit(i, &vcpu->irq_summary); + if (!irqchip_in_kernel(vcpu->kvm)) { + memcpy(vcpu->irq_pending, sregs->interrupt_bitmap, + sizeof vcpu->irq_pending); + vcpu->irq_summary = 0; + for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i) + if (vcpu->irq_pending[i]) + __set_bit(i, &vcpu->irq_summary); + } set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); |