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Re: [Qemu-block] [Qemu-devel] [PATCH 6/6] virtio-pci: use ioeventfd even
From: |
Fam Zheng |
Subject: |
Re: [Qemu-block] [Qemu-devel] [PATCH 6/6] virtio-pci: use ioeventfd even when KVM is disabled |
Date: |
Thu, 29 Jun 2017 16:57:36 +0800 |
User-agent: |
Mutt/1.8.0 (2017-02-23) |
On Wed, 06/28 19:47, Stefan Hajnoczi wrote:
> Old kvm.ko versions only supported a tiny number of ioeventfds so
> virtio-pci avoids ioeventfds when kvm_has_many_ioeventfds() returns 0.
>
> Do not check kvm_has_many_ioeventfds() when KVM is disabled since it
> always returns 0. Since commit 8c56c1a592b5092d91da8d8943c17777d6462a6f
> ("memory: emulate ioeventfd") it has been possible to use ioeventfds in
> qtest or TCG mode.
>
> This patch makes -device virtio-blk-pci,iothread=iothread0 work even
> when KVM is disabled.
>
> I have tested that virtio-blk-pci works under TCG both with and without
> iothread.
>
> This patch fixes qemu-iotests 068, which was accidentally merged early
> despite the dependency on ioeventfd.
>
> Cc: Michael S. Tsirkin <address@hidden>
> Signed-off-by: Stefan Hajnoczi <address@hidden>
> Reviewed-by: Michael S. Tsirkin <address@hidden>
> Message-id: address@hidden
> Signed-off-by: Stefan Hajnoczi <address@hidden>
Reviewed-by: Fam Zheng <address@hidden>
- Re: [Qemu-block] [Qemu-devel] [PATCH 1/6] libqos: fix typo in virtio.h QVirtQueue->used comment, (continued)
- [Qemu-block] [PATCH 2/6] libqos: add virtio used ring support, Stefan Hajnoczi, 2017/06/28
- [Qemu-block] [PATCH 3/6] tests: fix virtio-scsi-test ISR dependence, Stefan Hajnoczi, 2017/06/28
- [Qemu-block] [PATCH 4/6] tests: fix virtio-blk-test ISR dependence, Stefan Hajnoczi, 2017/06/28
- [Qemu-block] [PATCH 5/6] tests: fix virtio-net-test ISR dependence, Stefan Hajnoczi, 2017/06/28
- [Qemu-block] [PATCH 6/6] virtio-pci: use ioeventfd even when KVM is disabled, Stefan Hajnoczi, 2017/06/28
- Re: [Qemu-block] [Qemu-devel] [PATCH 6/6] virtio-pci: use ioeventfd even when KVM is disabled,
Fam Zheng <=
- Re: [Qemu-block] [Qemu-devel] [PATCH 0/6] virtio: use ioeventfd in TCG and qtest mode, Eric Blake, 2017/06/28
- Re: [Qemu-block] [PATCH 0/6] virtio: use ioeventfd in TCG and qtest mode, Michael S. Tsirkin, 2017/06/29
- Re: [Qemu-block] [PATCH 0/6] virtio: use ioeventfd in TCG and qtest mode, Stefan Hajnoczi, 2017/06/30