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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-05-19 08:49:22 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-26 15:22:22 +0300 |
| commit | 34536d78068318def0a370462cbc3319e1ca9014 (patch) | |
| tree | fa76b39ff661622039df20f8ab1d6e45e4264490 /arch/powerpc/platforms | |
| parent | c8bef10a9f17b2b9549e37878b2bcd48039c136b (diff) | |
| download | linux-34536d78068318def0a370462cbc3319e1ca9014.tar.xz | |
powerpc/8xx: Add a function to early map kernel via huge pages
Add a function to early map kernel memory using huge pages.
For 512k pages, just use standard page table and map in using 512k
pages.
For 8M pages, create a hugepd table and populate the two PGD
entries with it.
This function can only be used to create page tables at startup. Once
the regular SLAB allocation functions replace memblock functions,
this function cannot allocate new pages anymore. However it can still
update existing mappings with new protections.
hugepd_none() macro is moved into asm/hugetlb.h to be usable outside
of mm/hugetlbpage.c
early_pte_alloc_kernel() is made visible.
_PAGE_HUGE flag is now displayed by ptdump.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
[mpe: Change ptdump display to use "huge"]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/68325bcd3b6f93127f7810418a2352c3519066d6.1589866984.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/Kconfig.cputype | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index b0587b833517..404f26917da7 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -56,6 +56,7 @@ config PPC_8xx select PPC_HAVE_KUEP select PPC_HAVE_KUAP select HAVE_ARCH_VMAP_STACK + select HUGETLBFS config 40x bool "AMCC 40x" |