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Re: [Qemu-devel] [PATCH v13 09/13] add check reset mechanism when hotplu
From: |
Alex Williamson |
Subject: |
Re: [Qemu-devel] [PATCH v13 09/13] add check reset mechanism when hotplug vfio device |
Date: |
Mon, 16 Nov 2015 09:05:37 -0700 |
On Mon, 2015-11-16 at 18:18 +0800, Chen Fan wrote:
> Hi Alex,
>
> Thanks for your detailed explanation.
> during my test, I found that maybe there was another problem in vfio
> driver,
> I use a dual-port NIC which address are: 06:00.0 and 06:00.1 two functions.
> then I use aer-inject to inject one error to one function like following:
> AER
> ID 0000:06:00.0
> UNCOR_STATUS DLP
> HEADER_LOG 0 1 2 3
>
> here I boot qemu with one enable aer, one disable aer:
> ./x86_64-softmmu/qemu-system-x86_64 -M q35 -device
> ioh3420,bus=pcie.0,addr=1c.0,port=1,id=bridge1,chassis=1
> -device vfio-pci,host=06:00.1,bus=bridge1,addr=00.1
> -device
> vfio-pci,host=06:00.0,bus=bridge1,addr=00.0,aer=true,multifunction=on
>
> so we expected that the error only sent to the vfio device with host
> address is 06:00.0,
> but I found that all devices (06:00.0 , 06:00.1) receive the signal in
> qemu, which sent by vfio driver
> in vfio_pci_aer_err_detected. then qemu stopped by the device with
> 06:00.1 received the signal.
> is that right?
You would need to know whether the response for the injected AER affects
all devices on the link or is isolated to the function specified. VFIO
is just a passthrough for pci_error_handlers, so if error_detected is
getting called for each host device, it's going to signal each device to
the user. Thanks,
Alex
- [Qemu-devel] [PATCH v13 05/13] vfio: add pcie extanded capability support, (continued)
[Qemu-devel] [PATCH v13 08/13] vfio: add check host bus reset is support or not, Cao jin, 2015/11/11
[Qemu-devel] [PATCH v13 12/13] vfio-pci: pass the aer error to guest, Cao jin, 2015/11/11
[Qemu-devel] [PATCH v13 13/13] vfio: add 'aer' property to expose aercap, Cao jin, 2015/11/11
[Qemu-devel] [PATCH v13 11/13] pcie_aer: expose pcie_aer_msg() interface, Cao jin, 2015/11/11