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ioapic: kvm: Skip route updates for masked pins

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Masked entries will not generate interrupt messages, thus do no need to
be routed by KVM. This is a cosmetic cleanup, just avoiding warnings of
the kind

qemu-system-x86_64: vtd_irte_get: detected non-present IRTE (index=0, high=0xff00, low=0x100)

if the masked entry happens to reference a non-present IRTE.

Cc: qemu-stable@nongnu.org
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <a84b7e03-f9a8-b577-be27-4d93d1caa1c9@siemens.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
Jan Kiszka 2019-06-02 13:42:13 +02:00 committed by Michael S. Tsirkin
parent 21e2acd583
commit be1927c97e
1 changed files with 5 additions and 3 deletions
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8
hw/intc/ioapic.c
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@ -197,9 +197,11 @@ static void ioapic_update_kvm_routes(IOAPICCommonState *s)
MSIMessage msg;
struct ioapic_entry_info info;
ioapic_entry_parse(s->ioredtbl[i], &info);
msg.address = info.addr;
msg.data = info.data;
kvm_irqchip_update_msi_route(kvm_state, i, msg, NULL);
if (!info.masked) {
msg.address = info.addr;
msg.data = info.data;
kvm_irqchip_update_msi_route(kvm_state, i, msg, NULL);
}
}
kvm_irqchip_commit_routes(kvm_state);
}