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[Qemu-devel] [PULL 08/12] hw/virtio: enable common virtio feature for mm
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PULL 08/12] hw/virtio: enable common virtio feature for mmio device |
Date: |
Mon, 7 Jul 2014 15:40:32 +0300 |
From: Ming Lei <address@hidden>
Both 'indirect_desc' and 'event_idx' are bus independent features,
and they should be enabled for mmio devices too.
On arm64 quad core VM(qemu-kvm), the patch can increase block I/O
performance a lot with latest linux tree:
- without the patch: 14K IOPS
- with the patch: 34K IOPS
fio script:
[global]
direct=1
bsrange=4k-4k
timeout=10
numjobs=4
ioengine=libaio
iodepth=64
filename=/dev/vdc
group_reporting=1
[f1]
rw=randread
Cc: Peter Maydell <address@hidden>
Signed-off-by: Ming Lei <address@hidden>
Acked-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
hw/virtio/virtio-mmio.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c
index 8829eb0..18c6e5b 100644
--- a/hw/virtio/virtio-mmio.c
+++ b/hw/virtio/virtio-mmio.c
@@ -369,10 +369,16 @@ static void virtio_mmio_realizefn(DeviceState *d, Error
**errp)
sysbus_init_mmio(sbd, &proxy->iomem);
}
+static Property virtio_mmio_properties[] = {
+ DEFINE_VIRTIO_COMMON_FEATURES(VirtIOMMIOProxy, host_features),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
static void virtio_mmio_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
+ dc->props = virtio_mmio_properties;
dc->realize = virtio_mmio_realizefn;
dc->reset = virtio_mmio_reset;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
--
MST
- [Qemu-devel] [PULL 00/12] pc,vhost,virtio fixes, test, Michael S. Tsirkin, 2014/07/07
- [Qemu-devel] [PULL 01/12] qtest: enable vhost-user-test, Michael S. Tsirkin, 2014/07/07
- [Qemu-devel] [PULL 02/12] numa: check for busy memory backend, Michael S. Tsirkin, 2014/07/07
- [Qemu-devel] [PULL 03/12] pc-dimm: error out if memory hotplug is not enabled, Michael S. Tsirkin, 2014/07/07
- [Qemu-devel] [PULL 12/12] qemu-char: add chr_add_watch support in mux chardev, Michael S. Tsirkin, 2014/07/07
- [Qemu-devel] [PULL 10/12] qdev: Fix crash when using non-device class name on -global, Michael S. Tsirkin, 2014/07/07
- [Qemu-devel] [PULL 06/12] pci: assign devfn to pci_dev before calling pci_device_iommu_address_space(), Michael S. Tsirkin, 2014/07/07
- [Qemu-devel] [PULL 08/12] hw/virtio: enable common virtio feature for mmio device,
Michael S. Tsirkin <=
- [Qemu-devel] [PULL 07/12] acpi: fix typo in memory hotplug MMIO region name, Michael S. Tsirkin, 2014/07/07
- [Qemu-devel] [PULL 05/12] Handle G_IO_HUP in tcp_chr_read for tcp chardev, Michael S. Tsirkin, 2014/07/07
- [Qemu-devel] [PULL 11/12] virtio-pci: fix MSI memory region use after free, Michael S. Tsirkin, 2014/07/07
- [Qemu-devel] [PULL 09/12] qdev: Don't abort() in case globals can't be set, Michael S. Tsirkin, 2014/07/07
- [Qemu-devel] [PULL 04/12] virtio: move common virtio properties to bus class device, Michael S. Tsirkin, 2014/07/07
- Re: [Qemu-devel] [PULL 00/12] pc,vhost,virtio fixes, test, Peter Maydell, 2014/07/07