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Re: [Qemu-devel] [PATCH v10 07/10] pci: introduce function validation ch
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH v10 07/10] pci: introduce function validation check during hotplug |
Date: |
Mon, 28 Nov 2016 04:36:56 +0200 |
On Sun, Nov 27, 2016 at 07:32:30PM +0800, Cao jin wrote:
> From: Chen Fan <address@hidden>
>
> PCI hotplug requires that function 0 is added last to close the
> slot. Since vfio-pci supporting AER, we require that the VM bus
> contains the same set of devices as the host bus to support AER,
> we can perform an AER validation test whenever the function 0 is
> hot-added into VM.
>
> Signed-off-by: Chen Fan <address@hidden>
> Signed-off-by: Dou Liyang <address@hidden>
> Signed-off-by: Cao jin <address@hidden>
I'm fine with this interface.
Reviewed-by: Michael S. Tsirkin <address@hidden>
> ---
> hw/pci/pci.c | 29 +++++++++++++++++++++++++++++
> include/hw/pci/pci.h | 1 +
> 2 files changed, 30 insertions(+)
>
> diff --git a/hw/pci/pci.c b/hw/pci/pci.c
> index 24fae16..26eaf4c 100644
> --- a/hw/pci/pci.c
> +++ b/hw/pci/pci.c
> @@ -1942,6 +1942,20 @@ PCIDevice *pci_find_device(PCIBus *bus, int bus_num,
> uint8_t devfn)
> return bus->devices[devfn];
> }
>
> +static void pci_function_is_valid(PCIBus *bus, PCIDevice *d, void *opaque)
> +{
> + PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(d);
> + Error **errp = opaque;
> +
> + if (*errp) {
> + return;
> + }
> +
> + if (pc->is_valid_func) {
> + pc->is_valid_func(d, errp);
> + }
> +}
> +
> static void pci_qdev_realize(DeviceState *qdev, Error **errp)
> {
> PCIDevice *pci_dev = (PCIDevice *)qdev;
> @@ -1984,6 +1998,21 @@ static void pci_qdev_realize(DeviceState *qdev, Error
> **errp)
> pci_qdev_unrealize(DEVICE(pci_dev), NULL);
> return;
> }
> +
> + /*
> + * Hot-added function number 0 indicates the closure of the slot, it is
> + * time to check whether all functions under the same bus is valid.
> + */
> + if (DEVICE(pci_dev)->hotplugged &&
> + pci_get_function_0(pci_dev) == pci_dev) {
> + pci_for_each_device(bus, pci_bus_num(bus),
> + pci_function_is_valid, &local_err);
> + if (local_err) {
> + error_propagate(errp, local_err);
> + pci_qdev_unrealize(DEVICE(pci_dev), NULL);
> + return;
> + }
> + }
> }
>
> static void pci_default_realize(PCIDevice *dev, Error **errp)
> diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
> index 772692f..678f305 100644
> --- a/include/hw/pci/pci.h
> +++ b/include/hw/pci/pci.h
> @@ -205,6 +205,7 @@ typedef struct PCIDeviceClass {
>
> void (*realize)(PCIDevice *dev, Error **errp);
> int (*init)(PCIDevice *dev);/* TODO convert to realize() and remove */
> + void (*is_valid_func)(PCIDevice *dev, Error **errp);
> PCIUnregisterFunc *exit;
> PCIConfigReadFunc *config_read;
> PCIConfigWriteFunc *config_write;
> --
> 1.8.3.1
>
>
- [Qemu-devel] [PATCH v10 00/10] vfio-pci: pass the aer error to guest, Cao jin, 2016/11/27
- [Qemu-devel] [PATCH v10 01/10] vfio: extract vfio_get_hot_reset_info as a single function, Cao jin, 2016/11/27
- [Qemu-devel] [PATCH v10 02/10] vfio: squeeze out vfio_pci_do_hot_reset to support bus reset, Cao jin, 2016/11/27
- [Qemu-devel] [PATCH v10 03/10] pcie_aer: support configurable AER capa version, Cao jin, 2016/11/27
- [Qemu-devel] [PATCH v10 05/10] vfio: refine function vfio_pci_host_match, Cao jin, 2016/11/27
- [Qemu-devel] [PATCH v10 04/10] vfio: new function to init aer cap for vfio device, Cao jin, 2016/11/27
- [Qemu-devel] [PATCH v10 08/10] vfio: check aer functionality for hotplugged device, Cao jin, 2016/11/27
- [Qemu-devel] [PATCH v10 07/10] pci: introduce function validation check during hotplug, Cao jin, 2016/11/27
- Re: [Qemu-devel] [PATCH v10 07/10] pci: introduce function validation check during hotplug,
Michael S. Tsirkin <=
- [Qemu-devel] [PATCH v10 06/10] vfio: add check host bus reset is support or not, Cao jin, 2016/11/27
- [Qemu-devel] [PATCH v10 10/10] vfio: add 'aer' property to expose aercap, Cao jin, 2016/11/27
- [Qemu-devel] [PATCH v10 09/10] vfio-pci: pass the aer error to guest, Cao jin, 2016/11/27
- Re: [Qemu-devel] [PATCH v10 00/10] vfio-pci: pass the aer error to guest, no-reply, 2016/11/29