ac0a286f4d
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the OvmfPkg package Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Andrew Fish <afish@apple.com>
116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/** @file
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SMM CPU Platform Hook library instance for QEMU.
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Copyright (c) 2020, Red Hat, Inc.
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Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/BaseLib.h> // AsmReadMsr64()
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#include <PiSmm.h>
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#include <Register/Intel/ArchitecturalMsr.h> // MSR_IA32_APIC_BASE_REGISTER
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#include <Library/SmmCpuPlatformHookLib.h>
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/**
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Checks if platform produces a valid SMI.
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This function checks if platform produces a valid SMI. This function is
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called at SMM entry to detect if this is a spurious SMI. This function
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must be implemented in an MP safe way because it is called by multiple CPU
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threads.
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@retval TRUE There is a valid SMI
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@retval FALSE There is no valid SMI
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**/
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BOOLEAN
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EFIAPI
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PlatformValidSmi (
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VOID
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)
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{
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return TRUE;
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}
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/**
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Clears platform top level SMI status bit.
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This function clears platform top level SMI status bit.
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@retval TRUE The platform top level SMI status is cleared.
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@retval FALSE The platform top level SMI status cannot be
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cleared.
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**/
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BOOLEAN
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EFIAPI
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ClearTopLevelSmiStatus (
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VOID
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)
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{
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return TRUE;
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}
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/**
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Performs platform specific way of SMM BSP election.
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This function performs platform specific way of SMM BSP election.
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@param IsBsp Output parameter. TRUE: the CPU this function
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executes on is elected to be the SMM BSP. FALSE:
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the CPU this function executes on is to be SMM AP.
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@retval EFI_SUCCESS The function executes successfully.
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@retval EFI_NOT_READY The function does not determine whether this CPU
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should be BSP or AP. This may occur if hardware
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init sequence to enable the determination is yet to
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be done, or the function chooses not to do BSP
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election and will let SMM CPU driver to use its
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default BSP election process.
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@retval EFI_DEVICE_ERROR The function cannot determine whether this CPU
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should be BSP or AP due to hardware error.
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**/
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EFI_STATUS
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EFIAPI
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PlatformSmmBspElection (
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OUT BOOLEAN *IsBsp
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)
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{
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MSR_IA32_APIC_BASE_REGISTER ApicBaseMsr;
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ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE);
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*IsBsp = (BOOLEAN)(ApicBaseMsr.Bits.BSP == 1);
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return EFI_SUCCESS;
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}
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/**
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Get platform page table attribute.
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This function gets page table attribute of platform.
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@param Address Input parameter. Obtain the page table entries
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attribute on this address.
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@param PageSize Output parameter. The size of the page.
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@param NumOfPages Output parameter. Number of page.
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@param PageAttribute Output parameter. Paging Attributes (WB, UC, etc).
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@retval EFI_SUCCESS The platform page table attribute from the address
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is determined.
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@retval EFI_UNSUPPORTED The platform does not support getting page table
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attribute for the address.
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**/
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EFI_STATUS
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EFIAPI
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GetPlatformPageTableAttribute (
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IN UINT64 Address,
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IN OUT SMM_PAGE_SIZE_TYPE *PageSize,
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IN OUT UINTN *NumOfPages,
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IN OUT UINTN *PageAttribute
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)
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{
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return EFI_UNSUPPORTED;
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}
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