[PATCH 1/8] vfio/igd: fix GTT stolen memory size calculation for gen 7

[Tomita Moeko]

Both intel documentation [1][2] and i915 driver shows GGMS represents
GTT stolen memory size in multiple of 1MB, not 2MB starting from gen 8.

[1] 
https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/3rd-gen-core-desktop-vol-2-datasheet.pdf
[2] 
https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/4th-gen-core-family-desktop-vol-2-datasheet.pdf

Signed-off-by: Tomita Moeko <tomitamoeko@gmail.com>
---
 hw/vfio/igd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/vfio/igd.c b/hw/vfio/igd.c
index 4047f4f071..e40e601026 100644
--- a/hw/vfio/igd.c
+++ b/hw/vfio/igd.c
@@ -268,7 +268,7 @@ static int vfio_igd_gtt_max(VFIOPCIDevice *vdev)
 
     gmch = vfio_pci_read_config(&vdev->pdev, IGD_GMCH, sizeof(gmch));
     ggms = (gmch >> (gen < 8 ? 8 : 6)) & 0x3;
-    if (gen > 6) {
+    if (gen > 7) {
         ggms = 1 << ggms;
     }
 
@@ -678,7 +678,7 @@ void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr)
 
     /* Determine the size of stolen memory needed for GTT */
     ggms_mb = (gmch >> (gen < 8 ? 8 : 6)) & 0x3;
-    if (gen > 6) {
+    if (gen > 7) {
         ggms_mb = 1 << ggms_mb;
     }
 
-- 
2.45.2