From: Cornelia Huck <cornelia.huck@de.ibm.com>
To: Jason Wang <jasowang@redhat.com>
Cc: gleb@kernel.org, pbonzini@redhat.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, mst@redhat.com,
stable@vger.kernel.org
Subject: Re: [PATCH V6 4/6] kvm: fix zero length mmio searching
Date: Tue, 15 Sep 2015 09:52:35 +0200 [thread overview]
Message-ID: <20150915095235.1333ab5f.cornelia.huck@de.ibm.com> (raw)
In-Reply-To: <1442299319-5253-5-git-send-email-jasowang@redhat.com>
On Tue, 15 Sep 2015 14:41:57 +0800
Jason Wang <jasowang@redhat.com> wrote:
> Currently, if we had a zero length mmio eventfd assigned on
> KVM_MMIO_BUS. It will never be found by kvm_io_bus_cmp() since it
> always compares the kvm_io_range() with the length that guest
> wrote. This will cause e.g for vhost, kick will be trapped by qemu
> userspace instead of vhost. Fixing this by using zero length if an
> iodevice is zero length.
>
> 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/kvm_main.c | 19 +++++++++++++++++--
> 1 file changed, 17 insertions(+), 2 deletions(-)
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
next prev parent reply other threads:[~2015-09-15 7:52 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 ` [PATCH V6 1/6] kvm: don't try to register to KVM_FAST_MMIO_BUS for non mmio eventfd Jason Wang
2015-09-15 7:05 ` 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 [this message]
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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