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authorAndrey Smetanin <asmetanin@virtuozzo.com>2015-11-10 15:36:33 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2015-11-25 19:24:21 +0300
commitd62caabb41f33d96333f9ef15e09cd26e1c12760 (patch)
tree44e92d54641d6f6c04fc683175bd39ce563ce6fa /arch/x86/kvm/irq.c
parent6308630bd3dbb6a8a883c4c571ce5e5a759a8a0e (diff)
downloadlinux-d62caabb41f33d96333f9ef15e09cd26e1c12760.tar.xz
kvm/x86: per-vcpu apicv deactivation support
The decision on whether to use hardware APIC virtualization used to be taken globally, based on the availability of the feature in the CPU and the value of a module parameter. However, under certain circumstances we want to control it on per-vcpu basis. In particular, when the userspace activates HyperV synthetic interrupt controller (SynIC), APICv has to be disabled as it's incompatible with SynIC auto-EOI behavior. To achieve that, introduce 'apicv_active' flag on struct kvm_vcpu_arch, and kvm_vcpu_deactivate_apicv() function to turn APICv off. The flag is initialized based on the module parameter and CPU capability, and consulted whenever an APICv-specific action is performed. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> Signed-off-by: Denis V. Lunev <den@openvz.org> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/irq.c')
-rw-r--r--arch/x86/kvm/irq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c
index 097060e33bd6..3982b479bb5f 100644
--- a/arch/x86/kvm/irq.c
+++ b/arch/x86/kvm/irq.c
@@ -76,7 +76,7 @@ int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v)
if (kvm_cpu_has_extint(v))
return 1;
- if (kvm_vcpu_apic_vid_enabled(v))
+ if (kvm_vcpu_apicv_active(v))
return 0;
return kvm_apic_has_interrupt(v) != -1; /* LAPIC */