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kvm: ioapic: Lazy update IOAPIC EOI
authorSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Thu, 14 Nov 2019 20:15:19 +0000 (14:15 -0600)
committerPaolo Bonzini <pbonzini@redhat.com>
Wed, 5 Feb 2020 14:17:44 +0000 (15:17 +0100)
commitf458d039db7e8518041db4169d657407e3217008
tree695376329214f1f3bd71da2989a9d837387046fatree | snapshot
parent1ec2405c7cbf3afa7598c6b7546c81aa0cac78dccommit | diff
kvm: ioapic: Lazy update IOAPIC EOI

In-kernel IOAPIC does not receive EOI with AMD SVM AVIC
since the processor accelerate write to APIC EOI register and
does not trap if the interrupt is edge-triggered.

Workaround this by lazy check for pending APIC EOI at the time when
setting new IOPIC irq, and update IOAPIC EOI if no pending APIC EOI.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/ioapic.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git