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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2018-11-29 14:07:13 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-12-04 19:45:01 +1100 |
| commit | 5af543be14cdad5d515631c5fe6984813fe0db70 (patch) | |
| tree | 2ac55599f7dc58accf45beac0783f1649f254fb7 /arch/powerpc/mm | |
| parent | 8cfe4f5242ec3b1cc42c43f882c790900b093c8f (diff) | |
| download | linux-5af543be14cdad5d515631c5fe6984813fe0db70.tar.bz2 | |
powerpc/8xx: Temporarily disable 16k pages and hugepages
In preparation of making use of hardware assistance in TLB handlers,
this patch temporarily disables 16K pages and hugepages. The reason
is that when using HW assistance in 4K pages mode, the linux model
fit with the HW model for 4K pages and 8M pages.
However for 16K pages and 512K mode some additional work is needed
to get linux model fit with HW model.
For the 8M pages, they will naturaly come back when we switch to
HW assistance, without any additional handling.
In order to keep the following patch smaller, the removal of the
current special handling for 8M pages gets removed here as well.
Therefore the 4K pages mode will be implemented first and without
support for 512k hugepages. Then the 512k hugepages will be brought
back. And the 16K pages will be implemented in the following step.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/tlb_nohash.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c index ae5d568e267f..4f79639e432f 100644 --- a/arch/powerpc/mm/tlb_nohash.c +++ b/arch/powerpc/mm/tlb_nohash.c @@ -97,12 +97,6 @@ struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT] = { .shift = 14, }, #endif - [MMU_PAGE_512K] = { - .shift = 19, - }, - [MMU_PAGE_8M] = { - .shift = 23, - }, }; #else struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT] = { |