[edk2-devel] [PATCH v2 0/9] ArmPkg: eradicate and deprecate by set/way cache ops

[Ard Biesheuvel]

On Thu, 5 Mar 2020 at 17:29, Leif Lindholm <leif at nuviainc.com> wrote:
>
> On Wed, Mar 04, 2020 at 19:12:37 +0100, Ard Biesheuvel wrote:
> > This is a combination of v1 'ArmPkg: eradicate and deprecate by set/way cache
> > ops' and v1 'ArmPkg/ArmLib: ASSERT() on misuse of set/way ops'
> >
> > As it turns out, there were still some instances of set/way ops left in
> > the core code, in ArmMmuLib to be precise.
> >
> > This series fixes ArmMmuLib to perform the appropriate cache invalidation
> > when populating page tables with the MMU and caches off, allowing us to
> > get rid of the cache clean/disable/enable sequences which are incorrect
> > and pointless at the same time.
> >
> > I have incorporated some ArmLib changes that I posted separately before,
> > with the end result being that all uses pf set/way ops are gone from the
> > EDK2 core code, and the routines themselves will now ASSERT() when used
> > for anything other than managing the caches while the MMU is still off.
> > (Note that BeagleBoard in edk2-platforms still relies on this)
> >
> > Changes since v1[s]:
> > - don't deprecate the set/way ops but make the usable before MMU is enabled
> >   only
> > - use a more elaborate sequence for invalidating the page table entries on
> >   32-bit ARM, to ensure we are compliant with the nooks and crannies of
> >   version 7 of the architecture.
> > - incorporate patch #1, which was still pending on the list, and is related
> >   (its PrePeiCore sibling was already reviewed and merged)
> >
> > Ard Biesheuvel (9):
> >   ArmPlatformPkg/PrePi: replace set/way cache ops with by-VA ones
> >   ArmPkg/ArmMmuLib ARM: remove dummy constructor
> >   ArmPkg/ArmMmuLib ARM: split ArmMmuLibCore.c into core and update code
> >   ArmPkg/ArmMmuLib ARM: cache-invalidate initial page table entries
> >   ArmPkg/ArmMmuLib AARCH64: cache-invalidate initial page table entries
> >   ArmPkg/ArmLib: move set/way helper functions into private header
> >   ArmPkg/ArmLib: clean up library includes
> >   ArmPkg/ArmLib: remove bogus protocol declaration
> >   ArmPkg/ArmLib: ASSERT on set/way cache ops being used with MMU on
>
> Apart from the minor nit pointed out (which you can fix before
> committing) - for the series:
> Reviewed-by: Leif Lindholm <leif at nuviainc.com>
>

Thanks. These are merged now, along with the followup series, and the
only vaguely related cleanups for ARM.

I did spot one other issue on AArch64 though, so I'll send out another
followup patch to address that.

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