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Re: [PATCH 2/2] hw/virtio-pci Added AER capability.


From: Yan Vugenfirer
Subject: Re: [PATCH 2/2] hw/virtio-pci Added AER capability.
Date: Mon, 31 Aug 2020 12:29:39 +0300

Ping.

> On 13 Aug 2020, at 10:19 AM, andrew@daynix.com wrote:
> 
> From: Andrew <andrew@daynix.com>
> 
> Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1857668
> Added AER capability for virtio-pci devices.
> Also added property for devices, by default AER is enabled.
> 
> Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
> ---
> hw/virtio/virtio-pci.c | 16 ++++++++++++++++
> hw/virtio/virtio-pci.h |  4 ++++
> 2 files changed, 20 insertions(+)
> 
> diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> index 8e02709605..646dfb8a0d 100644
> --- a/hw/virtio/virtio-pci.c
> +++ b/hw/virtio/virtio-pci.c
> @@ -1806,6 +1806,12 @@ static void virtio_pci_realize(PCIDevice *pci_dev, 
> Error **errp)
>          */
>         pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
> 
> +        if (proxy->flags & VIRTIO_PCI_FLAG_AER) {
> +            pcie_aer_init(pci_dev, PCI_ERR_VER, last_pcie_cap_offset,
> +                          PCI_ERR_SIZEOF, NULL);
> +            last_pcie_cap_offset += PCI_ERR_SIZEOF;
> +        }
> +
>         if (proxy->flags & VIRTIO_PCI_FLAG_INIT_DEVERR) {
>             /* Init error enabling flags */
>             pcie_cap_deverr_init(pci_dev);
> @@ -1847,7 +1853,15 @@ static void virtio_pci_realize(PCIDevice *pci_dev, 
> Error **errp)
> 
> static void virtio_pci_exit(PCIDevice *pci_dev)
> {
> +    VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
> +    bool pcie_port = pci_bus_is_express(pci_get_bus(pci_dev)) &&
> +                     !pci_bus_is_root(pci_get_bus(pci_dev));
> +
>     msix_uninit_exclusive_bar(pci_dev);
> +    if (proxy->flags & VIRTIO_PCI_FLAG_AER && pcie_port &&
> +        pci_is_express(pci_dev)) {
> +        pcie_aer_exit(pci_dev);
> +    }
> }
> 
> static void virtio_pci_reset(DeviceState *qdev)
> @@ -1900,6 +1914,8 @@ static Property virtio_pci_properties[] = {
>                     VIRTIO_PCI_FLAG_INIT_PM_BIT, true),
>     DEFINE_PROP_BIT("x-pcie-flr-init", VirtIOPCIProxy, flags,
>                     VIRTIO_PCI_FLAG_INIT_FLR_BIT, true),
> +    DEFINE_PROP_BIT("aer", VirtIOPCIProxy, flags,
> +                    VIRTIO_PCI_FLAG_AER_BIT, true),
>     DEFINE_PROP_END_OF_LIST(),
> };
> 
> diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h
> index e2eaaa9182..4b2491ff15 100644
> --- a/hw/virtio/virtio-pci.h
> +++ b/hw/virtio/virtio-pci.h
> @@ -45,6 +45,7 @@ enum {
>     VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT,
>     VIRTIO_PCI_FLAG_INIT_PM_BIT,
>     VIRTIO_PCI_FLAG_INIT_FLR_BIT,
> +    VIRTIO_PCI_FLAG_AER_BIT,
> };
> 
> /* Need to activate work-arounds for buggy guests at vmstate load. */
> @@ -84,6 +85,9 @@ enum {
> /* Init Function Level Reset capability */
> #define VIRTIO_PCI_FLAG_INIT_FLR (1 << VIRTIO_PCI_FLAG_INIT_FLR_BIT)
> 
> +/* Advanced Error Reporting capability */
> +#define VIRTIO_PCI_FLAG_AER (1 << VIRTIO_PCI_FLAG_AER_BIT)
> +
> typedef struct {
>     MSIMessage msg;
>     int virq;
> -- 
> 2.27.0
> 
> 




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