From 86e841dd964a148b05fe00dde6172c7c6d4395f5 Mon Sep 17 00:00:00 2001
From: Sheng Yang <sheng@linux.intel.com>
Date: Thu, 21 May 2009 17:08:52 -0700
Subject: [PATCH 14/25] kvm: qemu: Fill config with correct VID/DID

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>
Signed-off-by: Avi Kivity <avi@redhat.com>
(cherry picked from commit 9cab9b0cf53314910167b0c2ecc2920d3ed2dedf)
Signed-off-by: Chris Wright <chrisw@redhat.com>
Bugzilla: 498085
Message-Id: <1242950943-30180-15-git-send-email-chrisw@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
RH-Upstream-status: applied
Acked-by: Juan Quintela <quintela@redhat.com>
Acked-by: Marcelo Tosatti <mtosatti@redhat.com>
Acked-by: Don Dutile <ddutile@redhat.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 7226f6a..807652c 100644
--- a/qemu/hw/device-assignment.c
+++ b/qemu/hw/device-assignment.c
@@ -318,7 +318,8 @@ 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);
@@ -430,6 +431,7 @@ 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;
 
@@ -489,6 +491,33 @@ 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;
-- 
1.6.3.rc4.29.g8146