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| author | Sebastien Boeuf <sebastien.boeuf@intel.com> | 2022-05-10 20:50:46 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2022-06-03 10:51:26 +0000 |
| commit | bf25f27e0021ae1f37184fa8fc76382599e23012 (patch) | |
| tree | 0472c1ac2e0c4ea325f990c68cc21cde72ada8bc /OvmfPkg/Library/PlatformInitLib | |
| parent | 3129ed374c72cb1dc84ab5467d03ab0180a4d108 (diff) | |
| download | edk2-bf25f27e0021ae1f37184fa8fc76382599e23012.tar.gz edk2-bf25f27e0021ae1f37184fa8fc76382599e23012.tar.bz2 edk2-bf25f27e0021ae1f37184fa8fc76382599e23012.zip | |
OvmfPkg: Don't access A20 gate register on Cloud Hypervisor
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.boeuf@intel.com>
Acked-by: Jiewen Yao <jiewen.yao@intel.com>
Diffstat (limited to 'OvmfPkg/Library/PlatformInitLib')
| -rw-r--r-- | OvmfPkg/Library/PlatformInitLib/Platform.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/OvmfPkg/Library/PlatformInitLib/Platform.c b/OvmfPkg/Library/PlatformInitLib/Platform.c index ee802fd684..c3d34e43af 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
|