[Qemu-devel] [RFC v7 05/11] vfio: do hot bus reset when do virtual secondary bus reset

[Chen Fan]

when do virtual secondary bus reset, the vfio device under
this bus need to do host bus reset to reset the device.
so add this case.

Signed-off-by: Chen Fan <chen.fan.f...@cn.fujitsu.com>
---
 hw/vfio/pci.c                 | 12 +++++++++++-
 include/hw/vfio/vfio-common.h |  1 -
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index ff639db..cc169ea 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -169,6 +169,7 @@ typedef struct VFIOPCIDevice {
     bool has_flr;
     bool has_pm_reset;
     bool has_bus_reset;
+    bool needs_bus_reset;
     bool rom_read_failed;
 } VFIOPCIDevice;
 
@@ -3531,7 +3532,8 @@ static void vfio_pci_host_needs_bus_reset(Notifier *n, 
void *opaque)
     VFIOPCIDevice *vdev = container_of(n, VFIOPCIDevice, 
sec_bus_reset_notifier);
     VFIODevice *vbasedev = &vdev->vbasedev;
 
-    vbasedev->needs_bus_reset = true;
+    vdev->needs_bus_reset = true;
+    vbasedev->needs_reset = true;
 }
 
 static void vfio_check_host_bus_reset(VFIODevice *vbasedev)
@@ -3807,6 +3809,14 @@ static void vfio_pci_reset(DeviceState *dev)
 
     trace_vfio_pci_reset(vdev->vbasedev.name);
 
+    if (vdev->has_bus_reset && vdev->needs_bus_reset) {
+        vdev->needs_bus_reset = false;
+        if (vdev->vbasedev.needs_reset) {
+            vfio_pci_hot_reset(vdev, false);
+        }
+        return;
+    }
+
     vfio_pci_pre_reset(vdev);
 
     if (vdev->resetfn && !vdev->resetfn(vdev)) {
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index 5f5691a..0d1fb80 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -102,7 +102,6 @@ typedef struct VFIODevice {
     bool reset_works;
     bool needs_reset;
     bool allow_mmap;
-    bool needs_bus_reset;
     VFIODeviceOps *ops;
     unsigned int num_irqs;
     unsigned int num_regions;
-- 
1.9.3