Some driver(e.g. bnx2) do the following to enable MSI-X:
1. Mask all vectors.
2. Write the msg data and address.
3. Enable MSI-X
4. Unmask all the vectors.
For this, check per-vector mask bit before enable MSI-X would cause device
fail to enable MSI-X. So now we only determine the availability of vector
by if msg_data is zero.
Signed-off-by: Sheng Yang <sheng@xxxxxxxxxxxxxxx>
---
qemu/hw/device-assignment.c | 3 ---
1 files changed, 0 insertions(+), 3 deletions(-)
diff --git a/qemu/hw/device-assignment.c b/qemu/hw/device-assignment.c
index f33ce3c..1f0a1a7 100644
--- a/qemu/hw/device-assignment.c
+++ b/qemu/hw/device-assignment.c
@@ -823,9 +823,6 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
/* Get the usable entry number for allocating */
for (i = 0; i < entries_max_nr; i++) {
memcpy(&msg_ctrl, va + i * 16 + 12, 4);
- /* 0x1 is mask bit for per vector */
- if (msg_ctrl & 0x1)
- continue;
memcpy(&msg_data, va + i * 16 + 8, 4);
/* Ignore unused entry even it's unmasked */
if (msg_data == 0)
--
1.5.4.5
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
