From: Sebastien Boeuf <sebastien.bo...@intel.com>
Since Cloud Hypervisor doesn't emulate an A20 gate register on I/O port
0x92, it's better to avoid accessing it when the platform is identified
as Cloud Hypervisor.
Signed-off-by: Sebastien Boeuf <sebastien.bo...@intel.com>
---
OvmfPkg/Library/PlatformInitLib/Platform.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/OvmfPkg/Library/PlatformInitLib/Platform.c
b/OvmfPkg/Library/PlatformInitLib/Platform.c
index cb1a893aef..f2b07dc937 100644
--- a/OvmfPkg/Library/PlatformInitLib/Platform.c
+++ b/OvmfPkg/Library/PlatformInitLib/Platform.c
@@ -314,7 +314,9 @@ PlatformMiscInitialization (
//
// Disable A20 Mask
//
- IoOr8 (0x92, BIT1);
+ if (PlatformInfoHob->HostBridgeDevId != CLOUDHV_DEVICE_ID) {
+ IoOr8 (0x92, BIT1);
+ }
//
// Build the CPU HOB with guest RAM size dependent address width and 16-bits
--
2.32.0
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