From: Sheng Yang <[email protected]> Some guest drivers (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 <[email protected]> Signed-off-by: Avi Kivity <[email protected]> diff --git a/qemu/hw/device-assignment.c b/qemu/hw/device-assignment.c index 09e54ae..2cf67bb 100644 --- a/qemu/hw/device-assignment.c +++ b/qemu/hw/device-assignment.c @@ -822,9 +822,6 @@ 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) -- To unsubscribe from this list: send the line "unsubscribe kvm-commits" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
