KVM: x86: fix interrupt window handling in split IRQ chip case

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This patch ensures that dm_request_for_irq_injection and
post_kvm_run_save are in sync, avoiding that an endless ping-pong
between userspace (who correctly notices that IF=0) and
the kernel (who insists that userspace handles its request
for the interrupt window).

To synchronize them, it also adds checks for kvm_arch_interrupt_allowed
and !kvm_event_needs_reinjection.  These are always needed, not
just for in-kernel LAPIC.

Signed-off-by: Matt Gingell <gingell@google.com>
[A collage of two patches from Matt. - Paolo]
Fixes: 1c1a9ce973
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Matt Gingell 2015-11-17 17:32:05 +01:00 • committed by Paolo Bonzini

parent 585bb8f9a5

commit 127a457acb

1 changed files with 19 additions and 14 deletions

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arch/x86/kvm/x86.c

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