Re: [edk2-devel] [PATCH v2 1/4] OvmfPkg/Sec: Setup MTRR early in the boot process.

["Pedro Falcato" <pedro.falcato@gmail.com>]

On Thu, Jan 25, 2024 at 8:23 AM Gerd Hoffmann <kraxel@redhat.com> wrote:
>
> Specifically before running lzma uncompress of the main firmware volume.
> This is needed to make sure caching is enabled, otherwise the uncompress
> can be extremely slow.
>
> Adapt the ASSERTs and MTRR setup in PlatformInitLib to the changes.
>
> Background:  Depending on virtual machine configuration kvm may uses EPT
> memory types to apply guest MTRR settings.  In case MTRRs are disabled
> kvm will use the uncachable memory type for all mappings.  Here is the
> linux kernel function handling this:

It might not be wise to blat out GPLv2 source code in a commit message
:) Not that it's a violation of the GPL (we're not linking against it,
neither can the patch be considered a derivative work), but it might
just be a little too grey-area for a !GPL project.

-- 
Pedro


-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#114385): https://edk2.groups.io/g/devel/message/114385
Mute This Topic: https://groups.io/mt/103950478/7686176
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io]
-=-=-=-=-=-=-=-=-=-=-=-