diff options
| author | Longpeng(Mike) <longpeng2@huawei.com> | 2022-02-22 22:11:16 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-03-15 11:26:20 +0100 |
| commit | def4c5570c44cc775c47e6d8503e4d12868f53aa (patch) | |
| tree | b880ea2ed1c6c7e15a9ccb020f083806ed65e63d /target/i386 | |
| parent | 9568690868e2bcd8e35e449ac5013ca1d08968ac (diff) | |
kvm/msi: do explicit commit when adding msi routes
We invoke the kvm_irqchip_commit_routes() for each addition to MSI route
table, which is not efficient if we are adding lots of routes in some cases.
This patch lets callers invoke the kvm_irqchip_commit_routes(), so the
callers can decide how to optimize.
[1] https://lists.gnu.org/archive/html/qemu-devel/2021-11/msg00967.html
Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20220222141116.2091-3-longpeng2@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target/i386')
| -rw-r--r-- | target/i386/kvm/kvm.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 83d0988302..31d467b535 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -4940,16 +4940,18 @@ void kvm_arch_init_irq_routing(KVMState *s) kvm_gsi_routing_allowed = true; if (kvm_irqchip_is_split()) { + KVMRouteChange c = kvm_irqchip_begin_route_changes(s); int i; /* If the ioapic is in QEMU and the lapics are in KVM, reserve MSI routes for signaling interrupts to the local apics. */ for (i = 0; i < IOAPIC_NUM_PINS; i++) { - if (kvm_irqchip_add_msi_route(s, 0, NULL) < 0) { + if (kvm_irqchip_add_msi_route(&c, 0, NULL) < 0) { error_report("Could not enable split IRQ mode."); exit(1); } } + kvm_irqchip_commit_route_changes(&c); } } |