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 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#111339): https://edk2.groups.io/g/devel/message/111339 Mute This Topic: https://groups.io/mt/75267363/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/leave/9847357/21656/1706620634/xyzzy [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
