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| author | Steve Rutherford <srutherford@google.com> | 2015-07-29 23:21:41 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-10-01 15:06:27 +0200 |
| commit | 7543a635aa09eb138b2cbf60ac3ff19503ae6954 (patch) | |
| tree | 94d181962c2a3f64019f182900ed216a2f0c3e73 /arch/x86/include/asm | |
| parent | 49df6397edfc5a8ba8ca813b51fb9729d8e94b40 (diff) | |
| download | op-kernel-dev-7543a635aa09eb138b2cbf60ac3ff19503ae6954.zip op-kernel-dev-7543a635aa09eb138b2cbf60ac3ff19503ae6954.tar.gz | |
KVM: x86: Add KVM exit for IOAPIC EOIs
Adds KVM_EXIT_IOAPIC_EOI which allows the kernel to EOI
level-triggered IOAPIC interrupts.
Uses a per VCPU exit bitmap to decide whether or not the IOAPIC needs
to be informed (which is identical to the EOI_EXIT_BITMAP field used
by modern x86 processors, but can also be used to elide kvm IOAPIC EOI
exits on older processors).
[Note: A prototype using ResampleFDs found that decoupling the EOI
from the VCPU's thread made it possible for the VCPU to not see a
recent EOI after reentering the guest. This does not match real
hardware.]
Compile tested for Intel x86.
Signed-off-by: Steve Rutherford <srutherford@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index befcf55..af09fa1 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -574,6 +574,8 @@ struct kvm_vcpu_arch { struct { bool pv_unhalted; } pv; + + int pending_ioapic_eoi; }; struct kvm_lpage_info { |
