diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/OvmfPkg/Library/SmmCpuPlatformHookLibQemu | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/OvmfPkg/Library/SmmCpuPlatformHookLibQemu')
| -rw-r--r-- | roms/edk2/OvmfPkg/Library/SmmCpuPlatformHookLibQemu/SmmCpuPlatformHookLibQemu.c | 115 | ||||
| -rw-r--r-- | roms/edk2/OvmfPkg/Library/SmmCpuPlatformHookLibQemu/SmmCpuPlatformHookLibQemu.inf | 32 |
2 files changed, 147 insertions, 0 deletions
diff --git a/roms/edk2/OvmfPkg/Library/SmmCpuPlatformHookLibQemu/SmmCpuPlatformHookLibQemu.c b/roms/edk2/OvmfPkg/Library/SmmCpuPlatformHookLibQemu/SmmCpuPlatformHookLibQemu.c new file mode 100644 index 000000000..c88a95c6d --- /dev/null +++ b/roms/edk2/OvmfPkg/Library/SmmCpuPlatformHookLibQemu/SmmCpuPlatformHookLibQemu.c @@ -0,0 +1,115 @@ +/** @file
+SMM CPU Platform Hook library instance for QEMU.
+
+Copyright (c) 2020, Red Hat, Inc.
+Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+#include <Library/BaseLib.h> // AsmReadMsr64()
+#include <PiSmm.h>
+#include <Register/Intel/ArchitecturalMsr.h> // MSR_IA32_APIC_BASE_REGISTER
+
+#include <Library/SmmCpuPlatformHookLib.h>
+
+/**
+ Checks if platform produces a valid SMI.
+
+ This function checks if platform produces a valid SMI. This function is
+ called at SMM entry to detect if this is a spurious SMI. This function
+ must be implemented in an MP safe way because it is called by multiple CPU
+ threads.
+
+ @retval TRUE There is a valid SMI
+ @retval FALSE There is no valid SMI
+
+**/
+BOOLEAN
+EFIAPI
+PlatformValidSmi (
+ VOID
+ )
+{
+ return TRUE;
+}
+
+/**
+ Clears platform top level SMI status bit.
+
+ This function clears platform top level SMI status bit.
+
+ @retval TRUE The platform top level SMI status is cleared.
+ @retval FALSE The platform top level SMI status cannot be
+ cleared.
+
+**/
+BOOLEAN
+EFIAPI
+ClearTopLevelSmiStatus (
+ VOID
+ )
+{
+ return TRUE;
+}
+
+/**
+ Performs platform specific way of SMM BSP election.
+
+ This function performs platform specific way of SMM BSP election.
+
+ @param IsBsp Output parameter. TRUE: the CPU this function
+ executes on is elected to be the SMM BSP. FALSE:
+ the CPU this function executes on is to be SMM AP.
+
+ @retval EFI_SUCCESS The function executes successfully.
+ @retval EFI_NOT_READY The function does not determine whether this CPU
+ should be BSP or AP. This may occur if hardware
+ init sequence to enable the determination is yet to
+ be done, or the function chooses not to do BSP
+ election and will let SMM CPU driver to use its
+ default BSP election process.
+ @retval EFI_DEVICE_ERROR The function cannot determine whether this CPU
+ should be BSP or AP due to hardware error.
+
+**/
+EFI_STATUS
+EFIAPI
+PlatformSmmBspElection (
+ OUT BOOLEAN *IsBsp
+ )
+{
+ MSR_IA32_APIC_BASE_REGISTER ApicBaseMsr;
+
+ ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE);
+ *IsBsp = (BOOLEAN)(ApicBaseMsr.Bits.BSP == 1);
+ return EFI_SUCCESS;
+}
+
+/**
+ Get platform page table attribute.
+
+ This function gets page table attribute of platform.
+
+ @param Address Input parameter. Obtain the page table entries
+ attribute on this address.
+ @param PageSize Output parameter. The size of the page.
+ @param NumOfPages Output parameter. Number of page.
+ @param PageAttribute Output parameter. Paging Attributes (WB, UC, etc).
+
+ @retval EFI_SUCCESS The platform page table attribute from the address
+ is determined.
+ @retval EFI_UNSUPPORTED The platform does not support getting page table
+ attribute for the address.
+
+**/
+EFI_STATUS
+EFIAPI
+GetPlatformPageTableAttribute (
+ IN UINT64 Address,
+ IN OUT SMM_PAGE_SIZE_TYPE *PageSize,
+ IN OUT UINTN *NumOfPages,
+ IN OUT UINTN *PageAttribute
+ )
+{
+ return EFI_UNSUPPORTED;
+}
diff --git a/roms/edk2/OvmfPkg/Library/SmmCpuPlatformHookLibQemu/SmmCpuPlatformHookLibQemu.inf b/roms/edk2/OvmfPkg/Library/SmmCpuPlatformHookLibQemu/SmmCpuPlatformHookLibQemu.inf new file mode 100644 index 000000000..413c56fce --- /dev/null +++ b/roms/edk2/OvmfPkg/Library/SmmCpuPlatformHookLibQemu/SmmCpuPlatformHookLibQemu.inf @@ -0,0 +1,32 @@ +## @file
+# SMM CPU Platform Hook library instance for QEMU.
+#
+# Copyright (c) 2020, Red Hat, Inc.
+# Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+ INF_VERSION = 1.29
+ BASE_NAME = SmmCpuPlatformHookLibQemu
+ FILE_GUID = 154D6D26-54B8-45BC-BA3A-CBAA20C02A6A
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = SmmCpuPlatformHookLib
+
+#
+# The following information is for reference only and not required by the build
+# tools.
+#
+# VALID_ARCHITECTURES = IA32 X64
+#
+
+[Sources]
+ SmmCpuPlatformHookLibQemu.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ UefiCpuPkg/UefiCpuPkg.dec
+
+[LibraryClasses]
+ BaseLib
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