From: "Daniel P. Berrangé" <berrange@redhat.com>
To: Gao Shiyuan <gaoshiyuan@baidu.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
Marcel Apfelbaum <marcel.apfelbaum@gmail.com>,
zuoboqun@baidu.com, david@redhat.com, qemu-devel@nongnu.org,
Junjie Mao <junjie.mao@hotmail.com>,
wangliang44@baidu.com
Subject: Re: [PATCH v3 1/1] virtio-pci: fix memory_region_find for VirtIOPCIRegion's MR
Date: Wed, 30 Oct 2024 14:11:46 +0000 [thread overview]
Message-ID: <ZyI-ohjzBP7vYXnQ@redhat.com> (raw)
In-Reply-To: <20241030131324.34144-1-gaoshiyuan@baidu.com>
On Wed, Oct 30, 2024 at 09:13:24PM +0800, Gao Shiyuan wrote:
> As shown below, if a virtio PCI device is attached under a pci-bridge, the MR
> of VirtIOPCIRegion does not belong to any address space. So memory_region_find
> cannot be used to search for this MR.
>
> Introduce the virtio-pci and pci_bridge address spaces to solve this problem.
>
> Before:
> memory-region: pci_bridge_pci
> 0000000000000000-ffffffffffffffff (prio 0, i/o): pci_bridge_pci
> 00000000fe840000-00000000fe840fff (prio 1, i/o): virtio-net-pci-msix
> 00000000fe840000-00000000fe84003f (prio 0, i/o): msix-table
> 00000000fe840800-00000000fe840807 (prio 0, i/o): msix-pba
> 0000380000000000-0000380000003fff (prio 1, i/o): virtio-pci
> 0000380000000000-0000380000000fff (prio 0, i/o): virtio-pci-common-virtio-net
> 0000380000001000-0000380000001fff (prio 0, i/o): virtio-pci-isr-virtio-net
> 0000380000002000-0000380000002fff (prio 0, i/o): virtio-pci-device-virtio-net
> 0000380000003000-0000380000003fff (prio 0, i/o): virtio-pci-notify-virtio-net
>
> After:
> address-space: virtio-pci-cfg-mem-as
> 0000380000000000-0000380000003fff (prio 1, i/o): virtio-pci
> 0000380000000000-0000380000000fff (prio 0, i/o): virtio-pci-common-virtio-net
> 0000380000001000-0000380000001fff (prio 0, i/o): virtio-pci-isr-virtio-net
> 0000380000002000-0000380000002fff (prio 0, i/o): virtio-pci-device-virtio-net
> 0000380000003000-0000380000003fff (prio 0, i/o): virtio-pci-notify-virtio-net
>
> address-space: pci_bridge_pci_mem
> 0000000000000000-ffffffffffffffff (prio 0, i/o): pci_bridge_pci
> 00000000fe840000-00000000fe840fff (prio 1, i/o): virtio-net-pci-msix
> 00000000fe840000-00000000fe84003f (prio 0, i/o): msix-table
> 00000000fe840800-00000000fe840807 (prio 0, i/o): msix-pba
> 0000380000000000-0000380000003fff (prio 1, i/o): virtio-pci
> 0000380000000000-0000380000000fff (prio 0, i/o): virtio-pci-common-virtio-net
> 0000380000001000-0000380000001fff (prio 0, i/o): virtio-pci-isr-virtio-net
> 0000380000002000-0000380000002fff (prio 0, i/o): virtio-pci-device-virtio-net
> 0000380000003000-0000380000003fff (prio 0, i/o): virtio-pci-notify-virtio-net
>
> Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2576
> Fixes: ffa8a3e3b2e6 ("virtio-pci: Add lookup subregion of VirtIOPCIRegion MR")
> Co-developed-by: Zuo Boqun <zuoboqun@baidu.com>
> Signed-off-by: Zuo Boqun <zuoboqun@baidu.com>
> Co-developed-by: Wang Liang <wangliang44@baidu.com>
> Signed-off-by: Wang Liang <wangliang44@baidu.com>
> Signed-off-by: Gao Shiyuan <gaoshiyuan@baidu.com>
> ---
> hw/pci/pci_bridge.c | 5 ++++
> hw/virtio/virtio-pci.c | 10 +++++++
> include/hw/pci/pci_bridge.h | 2 ++
> include/hw/virtio/virtio-pci.h | 3 +++
> tests/qtest/fuzz-virtio-balloon-test.c | 37 ++++++++++++++++++++++++++
> tests/qtest/meson.build | 1 +
> 6 files changed, 58 insertions(+)
> create mode 100644 tests/qtest/fuzz-virtio-balloon-test.c
>
> v2 -> v3:
> * add qtest for the issue
> * fix a bug, only when enable modern_pio, destroy modern_cfg_io_as
>
> v1 -> v2:
> * modify commit message
> * add address space for port I/O notification config region
Tested-by: Daniel P. Berrangé <berrange@redhat.com>
With regards,
Daniel
--
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prev parent reply other threads:[~2024-10-30 14:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-30 13:13 [PATCH v3 1/1] virtio-pci: fix memory_region_find for VirtIOPCIRegion's MR Gao Shiyuan via
2024-10-30 14:11 ` Daniel P. Berrangé [this message]
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