[edk2-devel] [PATCH v3 02/11] UefiCpuPkg/VmgExitLib: Add interfaces to set/read GHCB ValidBitmap bits

[Laszlo Ersek]

On 10/29/20 15:17, Lendacky, Thomas wrote:
> From: Tom Lendacky <thomas.lendacky at amd.com>
> 
> BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3008
> 
> In upcoming patches, the setting of the bits in the GHCB ValidBitmap will
> be performed in multiple places. In order to reduce code duplication, add
> an interface, VmgSetOffsetValid(), to VmgExitLib library to perform this
> function. Also, to keep management of the ValidBitmap within the library,
> add an inteface, VmgIsOffsetValid(), to return whether the bit in the
> ValidBitmap is set for a specified offset.
> 
> The new VmgSetOffsetValid() function is a VOID function and will be an
> empty function in the VmgExitLibNull implementation of the VmgExitLib
> library.
> 
> The new VmgIsOffsetValid() function returns a BOOLEAN to indicate if the
> offset is valid. This will always return FALSE in the VmgExitLibNull
> implementation of the VmgExitLib library.
> 
> Cc: Eric Dong <eric.dong at intel.com>
> Cc: Ray Ni <ray.ni at intel.com>
> Cc: Laszlo Ersek <lersek at redhat.com>
> Cc: Rahul Kumar <rahul1.kumar at intel.com>
> Reviewed-by: Laszlo Ersek <lersek at redhat.com>
> Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
> ---
>  UefiCpuPkg/Include/Library/VmgExitLib.h            | 37 +++++++++++++++++
>  UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.c | 42 ++++++++++++++++++++
>  2 files changed, 79 insertions(+)

Thanks for the updates.

Laszlo



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