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| author | Eddie Dong <eddie.dong@intel.com> | 2007-08-06 16:29:07 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-10-13 10:18:26 +0200 |
| commit | 2a8067f17b8442ecce0b14e134823020ff33b4fa (patch) | |
| tree | e7f65775b3ced0c42de2df8118a84e7ddb9fff7d /drivers/kvm/kvm_main.c | |
| parent | 96ad2cc6132479aa0aea485d0838a13fda765bd5 (diff) | |
| download | lwn-2a8067f17b8442ecce0b14e134823020ff33b4fa.tar.gz lwn-2a8067f17b8442ecce0b14e134823020ff33b4fa.zip | |
KVM: pending irq save/restore
Add in kernel irqchip save/restore support for pending vectors.
[avi: fix compile warning on i386]
[avi: remove printk]
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Qing He <qing.he@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/kvm_main.c')
| -rw-r--r-- | drivers/kvm/kvm_main.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index a012d70d9eff..d56964a6eb80 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -2126,6 +2126,7 @@ static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { struct descriptor_table dt; + int pending_vec; vcpu_load(vcpu); @@ -2155,10 +2156,13 @@ static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, sregs->efer = vcpu->shadow_efer; sregs->apic_base = kvm_get_apic_base(vcpu); - if (irqchip_in_kernel(vcpu->kvm)) + if (irqchip_in_kernel(vcpu->kvm)) { memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); - else + pending_vec = kvm_arch_ops->get_irq(vcpu); + if (pending_vec >= 0) + set_bit(pending_vec, (unsigned long *)sregs->interrupt_bitmap); + } else memcpy(sregs->interrupt_bitmap, vcpu->irq_pending, sizeof sregs->interrupt_bitmap); @@ -2177,7 +2181,7 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { int mmu_reset_needed = 0; - int i; + int i, pending_vec, max_bits; struct descriptor_table dt; vcpu_load(vcpu); @@ -2221,6 +2225,16 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i) if (vcpu->irq_pending[i]) __set_bit(i, &vcpu->irq_summary); + } else { + max_bits = (sizeof sregs->interrupt_bitmap) << 3; + pending_vec = find_first_bit( + (const unsigned long *)sregs->interrupt_bitmap, + max_bits); + /* Only pending external irq is handled here */ + if (pending_vec < max_bits) { + kvm_arch_ops->set_irq(vcpu, pending_vec); + printk("Set back pending irq %d\n", pending_vec); + } } set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |