[PATCH 2/3] KVM: Fill config with correct VID/DID

Sheng Yang
2009-03-04T07:54:33Z

SRIOV's virtual function didn't show correct Vendor ID/Device ID in config, so
we have to fill them manually according to device/vendor file in sysfs.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
---
qemu/hw/device-assignment.c | 31 ++++++++++++++++++++++++++++++-
1 files changed, 30 insertions(+), 1 deletions(-)

diff --git a/qemu/hw/device-assignment.c b/qemu/hw/device-assignment.c
index 7f9c789..867229d 100644
--- a/qemu/hw/device-assignment.c
+++ b/qemu/hw/device-assignment.c
@@ -317,7 +317,8 @@ static uint32_t assigned_dev_pci_read_config(PCIDevice *d, uint32_t address,
ssize_t ret;
AssignedDevice *pci_dev = container_of(d, AssignedDevice, dev);

- if ((address >= 0x10 && address <= 0x24) || address == 0x34 ||
+ if (address < 0x4 ||
+ (address >= 0x10 && address <= 0x24) || address == 0x34 ||
address == 0x3c || address == 0x3d ||
pci_access_cap_config(d, address, len)) {
val = pci_default_read_config(d, address, len);
@@ -429,6 +430,7 @@ static int get_real_device(AssignedDevice *pci_dev, uint8_t r_bus,
int fd, r = 0;
FILE *f;
unsigned long long start, end, size, flags;
+ unsigned long id;
PCIRegion *rp;
PCIDevRegions *dev = &pci_dev->real_device;

@@ -488,6 +490,33 @@ again:
DEBUG("region %d size %d start 0x%llx type %d resource_fd %d\n",
r, rp->size, start, rp->type, rp->resource_fd);
}
+
+ fclose(f);
+
+ /* read and fill device ID */
+ snprintf(name, sizeof(name), "%svendor", dir);
+ f = fopen(name, "r");
+ if (f == NULL) {
+ fprintf(stderr, "%s: %s: %m\n", __func__, name);
+ return 1;
+ }
+ if (fscanf(f, "%li\n", &id) == 1) {
+ pci_dev->dev.config[0] = id & 0xff;
+ pci_dev->dev.config[1] = (id & 0xff00) >> 8;
+ }
+ fclose(f);
+
+ /* read and fill vendor ID */
+ snprintf(name, sizeof(name), "%sdevice", dir);
+ f = fopen(name, "r");
+ if (f == NULL) {
+ fprintf(stderr, "%s: %s: %m\n", __func__, name);
+ return 1;
+ }
+ if (fscanf(f, "%li\n", &id) == 1) {
+ pci_dev->dev.config[2] = id & 0xff;
+ pci_dev->dev.config[3] = (id & 0xff00) >> 8;
+ }
fclose(f);

dev->region_number = r;
--
1.5.4.5