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


From: andrew
Subject: [PATCH 2/2] hw/virtio-pci Added AER capability.
Date: Thu, 13 Aug 2020 10:19:31 +0300

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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