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| author | James Sullivan <sullivan.james.f@gmail.com> | 2015-03-19 02:26:04 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-05-07 11:29:45 +0200 |
| commit | d1ebdbf99a3ce90f3b886c2cf0dfd7da17703d2a (patch) | |
| tree | dc8aeb229f4347806c72a48473e5f18cfc43831b /arch/x86/kvm/lapic.c | |
| parent | kvm: x86: Extended struct kvm_lapic_irq with msi_redir_hint for MSI delivery (diff) | |
| download | linux-d1ebdbf99a3ce90f3b886c2cf0dfd7da17703d2a.tar.xz linux-d1ebdbf99a3ce90f3b886c2cf0dfd7da17703d2a.zip | |
kvm: x86: Deliver MSI IRQ to only lowest prio cpu if msi_redir_hint is true
An MSI interrupt should only be delivered to the lowest priority CPU
when it has RH=1, regardless of the delivery mode. Modified
kvm_is_dm_lowest_prio() to check for either irq->delivery_mode == APIC_DM_LOWPRI
or irq->msi_redir_hint.
Moved kvm_is_dm_lowest_prio() into lapic.h and renamed to
kvm_lowest_prio_delivery().
Changed a check in kvm_irq_delivery_to_apic_fast() from
irq->delivery_mode == APIC_DM_LOWPRI to kvm_is_dm_lowest_prio().
Signed-off-by: James Sullivan <sullivan.james.f@gmail.com>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/lapic.c')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 2573b29bbbb3..dc5b57bb1f76 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -728,7 +728,7 @@ bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src, dst = map->logical_map[cid]; - if (irq->delivery_mode == APIC_DM_LOWEST) { + if (kvm_lowest_prio_delivery(irq)) { int l = -1; for_each_set_bit(i, &bitmap, 16) { if (!dst[i]) |