From: Jason Wang <jasowang@redhat.com>
To: gleb@kernel.org, pbonzini@redhat.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: mst@redhat.com, cornelia.huck@de.ibm.com,
Jason Wang <jasowang@redhat.com>,
stable@vger.kernel.org
Subject: [PATCH V6 1/6] kvm: don't try to register to KVM_FAST_MMIO_BUS for non mmio eventfd
Date: Tue, 15 Sep 2015 14:41:54 +0800 [thread overview]
Message-ID: <1442299319-5253-2-git-send-email-jasowang@redhat.com> (raw)
In-Reply-To: <1442299319-5253-1-git-send-email-jasowang@redhat.com>
We only want zero length mmio eventfd to be registered on
KVM_FAST_MMIO_BUS. So check this explicitly when arg->len is zero to
make sure this.
Cc: stable@vger.kernel.org
Cc: Gleb Natapov <gleb@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
virt/kvm/eventfd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index 9ff4193..e404806 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -846,7 +846,7 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
/* When length is ignored, MMIO is also put on a separate bus, for
* faster lookups.
*/
- if (!args->len && !(args->flags & KVM_IOEVENTFD_FLAG_PIO)) {
+ if (!args->len && bus_idx == KVM_MMIO_BUS) {
ret = kvm_io_bus_register_dev(kvm, KVM_FAST_MMIO_BUS,
p->addr, 0, &p->dev);
if (ret < 0)
@@ -901,7 +901,7 @@ kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
continue;
kvm_io_bus_unregister_dev(kvm, bus_idx, &p->dev);
- if (!p->length) {
+ if (!p->length && p->bus_idx == KVM_MMIO_BUS) {
kvm_io_bus_unregister_dev(kvm, KVM_FAST_MMIO_BUS,
&p->dev);
}
--
2.1.4
next prev parent reply other threads:[~2015-09-15 6:42 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-15 6:41 [PATCH V6 0/6] Fast mmio eventfd fixes Jason Wang
2015-09-15 6:41 ` Jason Wang [this message]
2015-09-15 7:05 ` [PATCH V6 1/6] kvm: don't try to register to KVM_FAST_MMIO_BUS for non mmio eventfd Cornelia Huck
2015-09-15 6:41 ` [PATCH V6 2/6] kvm: factor out core eventfd assign/deassign logic Jason Wang
2015-09-15 7:07 ` Cornelia Huck
2015-09-15 6:41 ` [PATCH V6 3/6] kvm: fix double free for fast mmio eventfd Jason Wang
2015-09-15 7:13 ` Cornelia Huck
2015-09-15 6:41 ` [PATCH V6 4/6] kvm: fix zero length mmio searching Jason Wang
2015-09-15 7:52 ` Cornelia Huck
2015-09-15 6:41 ` [PATCH V6 5/6] kvm: add tracepoint for fast mmio Jason Wang
2015-09-15 6:41 ` [PATCH V6 6/6] kvm: add fast mmio capabilitiy Jason Wang
2015-09-15 15:07 ` Paolo Bonzini
2015-09-15 16:13 ` Cornelia Huck
2015-09-15 16:29 ` Paolo Bonzini
2015-09-15 16:44 ` Cornelia Huck
2015-09-15 16:47 ` Paolo Bonzini
2015-09-15 15:08 ` [PATCH V6 0/6] Fast mmio eventfd fixes Paolo Bonzini
2015-09-15 19:26 ` Michael S. Tsirkin
2015-09-16 8:11 ` Paolo Bonzini
2015-11-08 17:11 ` Michael S. Tsirkin
2015-11-09 4:35 ` Jason Wang
2015-11-09 20:19 ` Michael S. Tsirkin
2015-11-10 6:25 ` Jason Wang
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