diff options
| -rw-r--r-- | OvmfPkg/OvmfPkgIa32.dsc | 4 | ||||
| -rw-r--r-- | OvmfPkg/OvmfPkgIa32X64.dsc | 4 | ||||
| -rw-r--r-- | OvmfPkg/OvmfPkgX64.dsc | 4 | ||||
| -rw-r--r-- | OvmfPkg/PlatformPei/MemDetect.c | 2 | ||||
| -rw-r--r-- | OvmfPkg/PlatformPei/Platform.c | 43 | ||||
| -rw-r--r-- | OvmfPkg/PlatformPei/Platform.h | 2 | ||||
| -rw-r--r-- | OvmfPkg/PlatformPei/PlatformPei.inf | 1 |
7 files changed, 59 insertions, 1 deletions
diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc index ed43c45144..d913030522 100644 --- a/OvmfPkg/OvmfPkgIa32.dsc +++ b/OvmfPkg/OvmfPkgIa32.dsc @@ -488,6 +488,10 @@ gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|FALSE
gEfiMdeModulePkgTokenSpaceGuid.PcdPropertiesTableEnable|FALSE
+ # UefiCpuPkg PCDs related to initial AP bringup and general AP management.
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber|64
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuApInitTimeOutInMicroSeconds|50000
+
################################################################################
#
# Components Section - list of all EDK II Modules needed by this Platform.
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc index ccd156d923..8143ea9c28 100644 --- a/OvmfPkg/OvmfPkgIa32X64.dsc +++ b/OvmfPkg/OvmfPkgIa32X64.dsc @@ -496,6 +496,10 @@ gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|FALSE
gEfiMdeModulePkgTokenSpaceGuid.PcdPropertiesTableEnable|FALSE
+ # UefiCpuPkg PCDs related to initial AP bringup and general AP management.
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber|64
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuApInitTimeOutInMicroSeconds|50000
+
################################################################################
#
# Components Section - list of all EDK II Modules needed by this Platform.
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc index 012ce85462..d48d603d33 100644 --- a/OvmfPkg/OvmfPkgX64.dsc +++ b/OvmfPkg/OvmfPkgX64.dsc @@ -495,6 +495,10 @@ gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|FALSE
gEfiMdeModulePkgTokenSpaceGuid.PcdPropertiesTableEnable|FALSE
+ # UefiCpuPkg PCDs related to initial AP bringup and general AP management.
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber|64
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuApInitTimeOutInMicroSeconds|50000
+
################################################################################
#
# Components Section - list of all EDK II Modules needed by this Platform.
diff --git a/OvmfPkg/PlatformPei/MemDetect.c b/OvmfPkg/PlatformPei/MemDetect.c index d00a570d43..af96a04d19 100644 --- a/OvmfPkg/PlatformPei/MemDetect.c +++ b/OvmfPkg/PlatformPei/MemDetect.c @@ -358,7 +358,7 @@ PublishPeiMemory ( //
if (mS3Supported) {
mS3AcpiReservedMemorySize = SIZE_512KB +
- PcdGet32 (PcdCpuMaxLogicalProcessorNumber) *
+ mMaxCpuCount *
PcdGet32 (PcdCpuApStackSize);
mS3AcpiReservedMemoryBase = LowerMemorySize - mS3AcpiReservedMemorySize;
LowerMemorySize = mS3AcpiReservedMemoryBase;
diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c index c6e1106c9e..0be86722e5 100644 --- a/OvmfPkg/PlatformPei/Platform.c +++ b/OvmfPkg/PlatformPei/Platform.c @@ -68,6 +68,7 @@ EFI_BOOT_MODE mBootMode = BOOT_WITH_FULL_CONFIGURATION; BOOLEAN mS3Supported = FALSE;
+UINT32 mMaxCpuCount;
VOID
AddIoMemoryBaseSizeHob (
@@ -568,6 +569,47 @@ S3Verification ( /**
+ Fetch the number of boot CPUs from QEMU and expose it to UefiCpuPkg modules.
+ Set the mMaxCpuCount variable.
+**/
+VOID
+MaxCpuCountInitialization (
+ VOID
+ )
+{
+ UINT16 ProcessorCount;
+ RETURN_STATUS PcdStatus;
+
+ QemuFwCfgSelectItem (QemuFwCfgItemSmpCpuCount);
+ ProcessorCount = QemuFwCfgRead16 ();
+ //
+ // If the fw_cfg key or fw_cfg entirely is unavailable, load mMaxCpuCount
+ // from the PCD default. No change to PCDs.
+ //
+ if (ProcessorCount == 0) {
+ mMaxCpuCount = PcdGet32 (PcdCpuMaxLogicalProcessorNumber);
+ return;
+ }
+ //
+ // Otherwise, set mMaxCpuCount to the value reported by QEMU.
+ //
+ mMaxCpuCount = ProcessorCount;
+ //
+ // Additionally, tell UefiCpuPkg modules (a) the exact number of VCPUs, (b)
+ // to wait, in the initial AP bringup, exactly as long as it takes for all of
+ // the APs to report in. For this, we set the longest representable timeout
+ // (approx. 71 minutes).
+ //
+ PcdStatus = PcdSet32S (PcdCpuMaxLogicalProcessorNumber, ProcessorCount);
+ ASSERT_RETURN_ERROR (PcdStatus);
+ PcdStatus = PcdSet32S (PcdCpuApInitTimeOutInMicroSeconds, MAX_UINT32);
+ ASSERT_RETURN_ERROR (PcdStatus);
+ DEBUG ((DEBUG_INFO, "%a: QEMU reports %d processor(s)\n", __FUNCTION__,
+ ProcessorCount));
+}
+
+
+/**
Perform Platform PEI initialization.
@param FileHandle Handle of the file being invoked.
@@ -601,6 +643,7 @@ InitializePlatform ( S3Verification ();
BootModeInitialization ();
AddressWidthInitialization ();
+ MaxCpuCountInitialization ();
PublishPeiMemory ();
diff --git a/OvmfPkg/PlatformPei/Platform.h b/OvmfPkg/PlatformPei/Platform.h index eda765be30..18f42c3f0e 100644 --- a/OvmfPkg/PlatformPei/Platform.h +++ b/OvmfPkg/PlatformPei/Platform.h @@ -101,4 +101,6 @@ extern BOOLEAN mS3Supported; extern UINT8 mPhysMemAddressWidth;
+extern UINT32 mMaxCpuCount;
+
#endif // _PLATFORM_PEI_H_INCLUDED_
diff --git a/OvmfPkg/PlatformPei/PlatformPei.inf b/OvmfPkg/PlatformPei/PlatformPei.inf index 776a4ab11f..fbaed3182d 100644 --- a/OvmfPkg/PlatformPei/PlatformPei.inf +++ b/OvmfPkg/PlatformPei/PlatformPei.inf @@ -95,6 +95,7 @@ gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiS3Enable
gUefiCpuPkgTokenSpaceGuid.PcdCpuLocalApicBaseAddress
gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuApInitTimeOutInMicroSeconds
gUefiCpuPkgTokenSpaceGuid.PcdCpuApStackSize
[FixedPcd]
|