Did you mean to add it as a memory type by itself like EFI_MEMORY_TYPE_INFORMATION? My interpretation of Memory Type is that it is more of SW usability construct while Memory Attr is more of HW behavioural construct. Together they define how a memory region can be used.
On Fri, Nov 17, 2023 at 1:55 PM Laszlo Ersek <ler...@redhat.com> wrote: > On 11/17/23 09:07, Dhaval Sharma wrote: > > Hi, > > I wanted to revisit this thread and I am maintaining the context as > > there are a lot of details already mentioned here > regarding EFI_MEMORY_SP. > > Other than what has been addressed here, we also would like to have an > > option in edk2 to *avoid* using this type of memory for its own > > purposes. This seems like one of the motivations for original request > > and is being honored by OS today but not edk2 as it does not have any > > specific implementation today which takes this attribute into > consideration. > > I would like to add PCD based implementation which informs edk2 NOT to > > use this memory for its own purposes and leave it alone (as still > > available memory to OS). > > > > Specific-purpose memory (SPM). The memory is earmarked for > > specific purposes such as for specific device drivers or applications. > > The SPM attribute serves as a hint to the OS to avoid allocating this > > memory for core OS data or code that can not be relocated. > > Prolonged use of this memory for purposes other than the intended > > purpose may result in suboptimal platform performance. > > > > Some more context: > > https://lwn.net/Articles/784971/ > > Why was EFI_MEMORY_SP introduced as a memory attribute, rather than its > own memory type? > > Laszlo > > -- Thanks! =D -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#111457): https://edk2.groups.io/g/devel/message/111457 Mute This Topic: https://groups.io/mt/75267363/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
