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[Qemu-devel] [PATCH] virtio: Notice when the system doesn't support MSIx
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH] virtio: Notice when the system doesn't support MSIx at all |
Date: |
Tue, 19 May 2015 13:29:51 -0700 |
And do not issue an error_report in that case.
Signed-off-by: Richard Henderson <address@hidden>
---
hw/virtio/virtio-pci.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
--
This seems to be about the only sane way to test the value of
msi_supported from here. Thoughts?
r~
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 867c9d1..6763872 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -934,11 +934,16 @@ static void virtio_pci_device_plugged(DeviceState *d)
pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
config[PCI_INTERRUPT_PIN] = 1;
- if (proxy->nvectors &&
- msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) {
- error_report("unable to init msix vectors to %" PRIu32,
- proxy->nvectors);
- proxy->nvectors = 0;
+ if (proxy->nvectors) {
+ int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1);
+ if (err) {
+ /* Notice when a system that supports MSIx can't initialize it. */
+ if (err != -ENOTSUP) {
+ error_report("unable to init msix vectors to %" PRIu32,
+ proxy->nvectors);
+ }
+ proxy->nvectors = 0;
+ }
}
proxy->pci_dev.config_write = virtio_write_config;
--
2.1.0
- [Qemu-devel] virtio-pci msix error, Richard Henderson, 2015/05/19
- Re: [Qemu-devel] virtio-pci msix error, Michael S. Tsirkin, 2015/05/20
- Re: [Qemu-devel] virtio-pci msix error, Peter Maydell, 2015/05/20
- Re: [Qemu-devel] virtio-pci msix error, Fam Zheng, 2015/05/20
- Re: [Qemu-devel] virtio-pci msix error, Peter Maydell, 2015/05/20