diff options
| -rw-r--r-- | OvmfPkg/CpuS3DataDxe/CpuS3Data.c | 93 | ||||
| -rw-r--r-- | OvmfPkg/CpuS3DataDxe/CpuS3DataDxe.inf | 4 |
2 files changed, 71 insertions, 26 deletions
diff --git a/OvmfPkg/CpuS3DataDxe/CpuS3Data.c b/OvmfPkg/CpuS3DataDxe/CpuS3Data.c index 8bb9807cd5..bac7285aa2 100644 --- a/OvmfPkg/CpuS3DataDxe/CpuS3Data.c +++ b/OvmfPkg/CpuS3DataDxe/CpuS3Data.c @@ -23,6 +23,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/MtrrLib.h>
#include <Library/UefiBootServicesTableLib.h>
@@ -30,6 +31,9 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include <Protocol/MpService.h>
#include <Guid/EventGroup.h>
+#include <IndustryStandard/Q35MchIch9.h>
+#include <IndustryStandard/QemuCpuHotplug.h>
+
//
// Data structure used to allocate ACPI_CPU_DATA and its supporting structures
//
@@ -163,7 +167,6 @@ CpuS3DataInitialize ( ACPI_CPU_DATA *AcpiCpuData;
EFI_MP_SERVICES_PROTOCOL *MpServices;
UINTN NumberOfCpus;
- UINTN NumberOfEnabledProcessors;
VOID *Stack;
UINTN TableSize;
CPU_REGISTER_TABLE *RegisterTable;
@@ -175,6 +178,7 @@ CpuS3DataInitialize ( VOID *Idt;
EFI_EVENT Event;
ACPI_CPU_DATA *OldAcpiCpuData;
+ BOOLEAN FetchPossibleApicIds;
if (!PcdGetBool (PcdAcpiS3Enable)) {
return EFI_UNSUPPORTED;
@@ -190,24 +194,36 @@ CpuS3DataInitialize ( AcpiCpuData = &AcpiCpuDataEx->AcpiCpuData;
//
- // Get MP Services Protocol
+ // The "SMRAM at default SMBASE" feature guarantees that
+ // QEMU_CPUHP_CMD_GET_ARCH_ID too is available.
//
- Status = gBS->LocateProtocol (
- &gEfiMpServiceProtocolGuid,
- NULL,
- (VOID **)&MpServices
- );
- ASSERT_EFI_ERROR (Status);
+ FetchPossibleApicIds = PcdGetBool (PcdQ35SmramAtDefaultSmbase);
- //
- // Get the number of CPUs
- //
- Status = MpServices->GetNumberOfProcessors (
- MpServices,
- &NumberOfCpus,
- &NumberOfEnabledProcessors
- );
- ASSERT_EFI_ERROR (Status);
+ if (FetchPossibleApicIds) {
+ NumberOfCpus = PcdGet32 (PcdCpuMaxLogicalProcessorNumber);
+ } else {
+ UINTN NumberOfEnabledProcessors;
+
+ //
+ // Get MP Services Protocol
+ //
+ Status = gBS->LocateProtocol (
+ &gEfiMpServiceProtocolGuid,
+ NULL,
+ (VOID **)&MpServices
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Get the number of CPUs
+ //
+ Status = MpServices->GetNumberOfProcessors (
+ MpServices,
+ &NumberOfCpus,
+ &NumberOfEnabledProcessors
+ );
+ ASSERT_EFI_ERROR (Status);
+ }
AcpiCpuData->NumberOfCpus = (UINT32)NumberOfCpus;
//
@@ -263,20 +279,45 @@ CpuS3DataInitialize ( RegisterTable = (CPU_REGISTER_TABLE *)AllocateZeroPages (TableSize);
ASSERT (RegisterTable != NULL);
+ if (FetchPossibleApicIds) {
+ //
+ // Write a valid selector so that other hotplug registers can be
+ // accessed.
+ //
+ IoWrite32 (ICH9_CPU_HOTPLUG_BASE + QEMU_CPUHP_W_CPU_SEL, 0);
+ //
+ // We'll be fetching the APIC IDs.
+ //
+ IoWrite8 (ICH9_CPU_HOTPLUG_BASE + QEMU_CPUHP_W_CMD,
+ QEMU_CPUHP_CMD_GET_ARCH_ID);
+ }
for (Index = 0; Index < NumberOfCpus; Index++) {
- Status = MpServices->GetProcessorInfo (
- MpServices,
- Index,
- &ProcessorInfoBuffer
- );
- ASSERT_EFI_ERROR (Status);
-
- RegisterTable[Index].InitialApicId = (UINT32)ProcessorInfoBuffer.ProcessorId;
+ UINT32 InitialApicId;
+
+ if (FetchPossibleApicIds) {
+ IoWrite32 (ICH9_CPU_HOTPLUG_BASE + QEMU_CPUHP_W_CPU_SEL,
+ (UINT32)Index);
+ InitialApicId = IoRead32 (
+ ICH9_CPU_HOTPLUG_BASE + QEMU_CPUHP_RW_CMD_DATA);
+ } else {
+ Status = MpServices->GetProcessorInfo (
+ MpServices,
+ Index,
+ &ProcessorInfoBuffer
+ );
+ ASSERT_EFI_ERROR (Status);
+ InitialApicId = (UINT32)ProcessorInfoBuffer.ProcessorId;
+ }
+
+ DEBUG ((DEBUG_VERBOSE, "%a: Index=%05Lu ApicId=0x%08x\n", __FUNCTION__,
+ (UINT64)Index, InitialApicId));
+
+ RegisterTable[Index].InitialApicId = InitialApicId;
RegisterTable[Index].TableLength = 0;
RegisterTable[Index].AllocatedSize = 0;
RegisterTable[Index].RegisterTableEntry = 0;
- RegisterTable[NumberOfCpus + Index].InitialApicId = (UINT32)ProcessorInfoBuffer.ProcessorId;
+ RegisterTable[NumberOfCpus + Index].InitialApicId = InitialApicId;
RegisterTable[NumberOfCpus + Index].TableLength = 0;
RegisterTable[NumberOfCpus + Index].AllocatedSize = 0;
RegisterTable[NumberOfCpus + Index].RegisterTableEntry = 0;
diff --git a/OvmfPkg/CpuS3DataDxe/CpuS3DataDxe.inf b/OvmfPkg/CpuS3DataDxe/CpuS3DataDxe.inf index f9679e0c33..ceae1d4078 100644 --- a/OvmfPkg/CpuS3DataDxe/CpuS3DataDxe.inf +++ b/OvmfPkg/CpuS3DataDxe/CpuS3DataDxe.inf @@ -35,12 +35,14 @@ [Packages]
MdeModulePkg/MdeModulePkg.dec
MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
UefiCpuPkg/UefiCpuPkg.dec
[LibraryClasses]
BaseLib
BaseMemoryLib
DebugLib
+ IoLib
MemoryAllocationLib
MtrrLib
UefiBootServicesTableLib
@@ -55,7 +57,9 @@ [Pcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiS3Enable ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuApStackSize ## CONSUMES
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuS3DataAddress ## PRODUCES
+ gUefiOvmfPkgTokenSpaceGuid.PcdQ35SmramAtDefaultSmbase ## CONSUMES
[Depex]
gEfiMpServiceProtocolGuid
|