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| author | David S. Miller <davem@davemloft.net> | 2014-08-06 05:57:18 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-08-06 05:57:18 +0400 |
| commit | e9011d086674caeedb0ffb6eb5b8bc5920821df3 (patch) | |
| tree | ed5d06353d8dc1fa5f6da349808f8345ca2291a5 /arch/x86/kvm/x86.c | |
| parent | cfcfe22256d5a8a14924a1145d56017b043b554f (diff) | |
| parent | c78f77e20d2ba5d4d5e478e85a6fb42556893e2d (diff) | |
| download | linux-e9011d086674caeedb0ffb6eb5b8bc5920821df3.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Conflicts:
arch/sparc/mm/init_64.c
Conflict was simple non-overlapping additions.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index f6449334ec45..ef432f891d30 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5887,6 +5887,18 @@ static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win) kvm_x86_ops->set_nmi(vcpu); } } else if (kvm_cpu_has_injectable_intr(vcpu)) { + /* + * Because interrupts can be injected asynchronously, we are + * calling check_nested_events again here to avoid a race condition. + * See https://lkml.org/lkml/2014/7/2/60 for discussion about this + * proposal and current concerns. Perhaps we should be setting + * KVM_REQ_EVENT only on certain events and not unconditionally? + */ + if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { + r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); + if (r != 0) + return r; + } if (kvm_x86_ops->interrupt_allowed(vcpu)) { kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), false); |