[edk2-devel] [PATCH 1/3] UefiCpuPkg/PiSmmCpu: Add Internal function IsStaticPageTableEnabled
Dong, Eric
eric.dong at intel.com
Mon Jul 29 11:33:06 UTC 2019
Reviewed-by: Eric Dong <eric.dong at intel.com>
> -----Original Message-----
> From: devel at edk2.groups.io [mailto:devel at edk2.groups.io] On Behalf Of Ni,
> Ray
> Sent: Saturday, July 27, 2019 11:29 AM
> To: devel at edk2.groups.io
> Cc: Laszlo Ersek <lersek at redhat.com>
> Subject: [edk2-devel] [PATCH 1/3] UefiCpuPkg/PiSmmCpu: Add Internal
> function IsStaticPageTableEnabled
>
> The internal function reflects the status whether static page table is enabled.
>
> Signed-off-by: Ray Ni <ray.ni at intel.com>
> Cc: Laszlo Ersek <lersek at redhat.com>
> Cc: Eric Dong <eric.dong at intel.com.
> ---
> UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c | 16 ++++++++++++++++
> UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h | 15
> +++++++++++++++
> UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c | 16 ++++++++++++++++
> 3 files changed, 47 insertions(+)
>
> diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
> b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
> index 05fb455936..2a9af4b77d 100644
> --- a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
> +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
> @@ -28,6 +28,22 @@ EnableCet (
> VOID
> );
>
> +/**
> + Return whether Static Page Table is enabled.
> +
> + Note: Static Page Table is always disabled for IA32 build.
> +
> + @retval TRUE Static Page Table is enabled.
> + @retval FALSE Static Page Table is disabled.
> +**/
> +BOOLEAN
> +IsStaticPageTableEnabled (
> + VOID
> + )
> +{
> + return FALSE;
> +}
> +
> /**
> Create PageTable for SMM use.
>
> diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
> b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
> index 186809f431..14b7676c16 100644
> --- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
> +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
> @@ -1267,6 +1267,21 @@ EFIAPI
> PiSmmCpuSmiEntryFixupAddress (
> );
>
> +
> +/**
> + Return whether Static Page Table is enabled.
> +
> + Note: Static Page Table is always disabled for IA32 build.
> +
> + @retval TRUE Static Page Table is enabled.
> + @retval FALSE Static Page Table is disabled.
> +**/
> +BOOLEAN
> +IsStaticPageTableEnabled (
> + VOID
> + )
> +;
> +
> /**
> This function reads CR2 register when on-demand paging is enabled
> for 64 bit and no action for 32 bit.
> diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
> b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
> index a3b62f7787..18e3f9e08d 100644
> --- a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
> +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
> @@ -37,6 +37,22 @@ EnableCet (
> VOID
> );
>
> +/**
> + Return whether Static Page Table is enabled.
> +
> + Note: Static Page Table is always disabled for IA32 build.
> +
> + @retval TRUE Static Page Table is enabled.
> + @retval FALSE Static Page Table is disabled.
> +**/
> +BOOLEAN
> +IsStaticPageTableEnabled (
> + VOID
> + )
> +{
> + return mCpuSmmStaticPageTable;
> +}
> +
> /**
> Check if 1-GByte pages is supported by processor or not.
>
> --
> 2.21.0.windows.1
>
>
>
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