[SeaBIOS] [PATCH 2/5] shadow: Add no-op for make_bios_writable() on virt machine.

[Rob Bradford]

Our BIOS region is alway read-write so there is no need to program the
PAM or any other mechanism to allow the BIOS to continue.

Signed-off-by: Rob Bradford <robert.bradford at intel.com>
---
 src/fw/shadow.c  | 5 +++++
 src/hw/pci_ids.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/src/fw/shadow.c b/src/fw/shadow.c
index 4c627a8..4b909bd 100644
--- a/src/fw/shadow.c
+++ b/src/fw/shadow.c
@@ -142,6 +142,11 @@ make_bios_writable(void)
             ShadowBDF = bdf;
             return;
         }
+        if (vendor == PCI_VENDOR_ID_INTEL
+            && device == PCI_DEVICE_ID_INTEL_VIRT) {
+            ShadowBDF = bdf;
+            return;
+        }
     }
     dprintf(1, "Unable to unlock ram - bridge not found\n");
 }
diff --git a/src/hw/pci_ids.h b/src/hw/pci_ids.h
index 1096461..49c27f2 100644
--- a/src/hw/pci_ids.h
+++ b/src/hw/pci_ids.h
@@ -2528,6 +2528,7 @@
 #define PCI_DEVICE_ID_INTEL_IXP4XX	0x8500
 #define PCI_DEVICE_ID_INTEL_IXP2800	0x9004
 #define PCI_DEVICE_ID_INTEL_S21152BB	0xb152
+#define PCI_DEVICE_ID_INTEL_VIRT 0x0d57
 
 #define PCI_VENDOR_ID_SCALEMP		0x8686
 #define PCI_DEVICE_ID_SCALEMP_VSMP_CTL	0x1010
-- 
2.19.2