[PATCH 1/5] qemu-kvm: device assignment: Reset MSI-X table mask bit as set

Sheng Yang
2010-11-11T07:51:33Z

According to the PCI spec, mask bit of MSI-X table should be set after reset.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
---
hw/device-assignment.c | 12 ++++++++----
1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/hw/device-assignment.c b/hw/device-assignment.c
index 2605bd1..dfca764 100644
--- a/hw/device-assignment.c
+++ b/hw/device-assignment.c
@@ -1106,6 +1106,8 @@ static void assigned_dev_update_msi(PCIDevice *pci_dev, unsigned int ctrl_pos)
#endif

#ifdef KVM_CAP_DEVICE_MSIX
+
+#define PCI_MSIX_CTRL_MASKBIT 1ul
static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
{
AssignedDevice *adev = container_of(pci_dev, AssignedDevice, dev);
@@ -1128,9 +1130,8 @@ 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);
- memcpy(&msg_data, va + i * 16 + 8, 4);
/* Ignore unused entry even it's unmasked */
- if (msg_data == 0)
+ if (msg_ctrl & PCI_MSIX_CTRL_MASKBIT)
continue;
entries_nr ++;
}
@@ -1163,10 +1164,10 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
if (entries_nr >= msix_nr.entry_nr)
break;
memcpy(&msg_ctrl, va + i * 16 + 12, 4);
- memcpy(&msg_data, va + i * 16 + 8, 4);
- if (msg_data == 0)
+ if (msg_ctrl & PCI_MSIX_CTRL_MASKBIT)
continue;

+ memcpy(&msg_data, va + i * 16 + 8, 4);
memcpy(&msg_addr, va + i * 16, 4);
memcpy(&msg_upper_addr, va + i * 16 + 4, 4);

@@ -1398,6 +1399,7 @@ static CPUReadMemoryFunc *msix_mmio_read[] = {

static int assigned_dev_register_msix_mmio(AssignedDevice *dev)
{
+ int i;
dev->msix_table_page = mmap(NULL, 0x1000,
PROT_READ|PROT_WRITE,
MAP_ANONYMOUS|MAP_PRIVATE, 0, 0);
@@ -1407,6 +1409,8 @@ static int assigned_dev_register_msix_mmio(AssignedDevice *dev)
return -EFAULT;
}
memset(dev->msix_table_page, 0, 0x1000);
+ for (i = 0; i < 0x1000; i += 0x10)
+ *(uint32_t *)(dev->msix_table_page + i + 0xc) = 1;
dev->mmio_index = cpu_register_io_memory(
msix_mmio_read, msix_mmio_write, dev);
return 0;
--
1.7.0.1