summaryrefslogtreecommitdiffstats
path: root/include/uapi/linux/kvm.h
diff options
context:
space:
mode:
authorSteve Rutherford <srutherford@google.com>2015-07-29 23:21:41 -0700
committerPaolo Bonzini <pbonzini@redhat.com>2015-10-01 15:06:27 +0200
commit7543a635aa09eb138b2cbf60ac3ff19503ae6954 (patch)
tree94d181962c2a3f64019f182900ed216a2f0c3e73 /include/uapi/linux/kvm.h
parent49df6397edfc5a8ba8ca813b51fb9729d8e94b40 (diff)
downloadlinux-7543a635aa09eb138b2cbf60ac3ff19503ae6954.tar.gz
linux-7543a635aa09eb138b2cbf60ac3ff19503ae6954.tar.bz2
linux-7543a635aa09eb138b2cbf60ac3ff19503ae6954.zip
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 'include/uapi/linux/kvm.h')
-rw-r--r--include/uapi/linux/kvm.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index ed00f8fc9ea2..12e3afbf0f47 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -183,6 +183,7 @@ struct kvm_s390_skeys {
#define KVM_EXIT_EPR 23
#define KVM_EXIT_SYSTEM_EVENT 24
#define KVM_EXIT_S390_STSI 25
+#define KVM_EXIT_IOAPIC_EOI 26
/* For KVM_EXIT_INTERNAL_ERROR */
/* Emulate instruction failed. */
@@ -333,6 +334,10 @@ struct kvm_run {
__u8 sel1;
__u16 sel2;
} s390_stsi;
+ /* KVM_EXIT_IOAPIC_EOI */
+ struct {
+ __u8 vector;
+ } eoi;
/* Fix the size of the union. */
char padding[256];
};