Hi All,
This patch series attempt to update book3s 64 linux page table format to
make it more flexible. Our current pte format is very restrictive and we
overload multiple pte bits. This is due to the non-availability of free bits
in pte_t. We use pte_t to track the validity of 4K subpages. This patch
series free up pte_t of 11 bits by moving 4K subpage tracking to the
lower half of PTE page. The pte format is updated such that we have a
better method for identifying a pte entry at pmd level. This will also enable
us to implement hugetlb migration(not yet done in this series).
Before making the changes to the pte format, I am splitting the
pte header definition such that we now have the below layout for headers
book3s
32
hash.h pgtable.h
64
hash.h pgtable.h hash-4k.h hash-64k.h
booke
32
pgtable.h pte-40x.h pte-44x.h pte-8xx.h pte-fsl-booke.h
64
pgtable-4k.h pgtable-64k.h pgtable.h
I have done the header split such that booke headers and modified to the
minimum so as to avoid
causing breakage in booke.
The patch series can also be found at
https://github.com/kvaneesh/linux.git book3s-pte-format
https://github.com/kvaneesh/linux/commits/book3s-pte-format
Aneesh Kumar K.V (31):
powerpc/mm: move pte headers to book3s directory
powerpc/mm: move pte headers to book3s directory (part 2)
powerpc/mm: make a separate copy for book3s
powerpc/mm: make a separate copy for book3s (part 2)
powerpc/mm: Move hash specific pte width and other defines to book3s
powerpc/mm: Delete booke bits from book3s
powerpc/mm: Don't have generic headers introduce functions touching
pte bits
powerpc/mm: Drop pte-common.h from BOOK3S 64
powerpc/mm: Don't use pte_val as lvalue
powerpc/mm: Don't use pmd_val,pud_val and pgd_val as lvalue
powerpc/mm: Move hash64 PTE bits from book3s/64/pgtable.h to hash.h
powerpc/mm: Move PTE bits from generic functions to hash64 functions.
powerpc/booke: Move booke headers (part 1)
powerpc/booke: Move booke headers (part 2)
powerpc/booke: Move booke headers (part 3)
powerpc/booke: Move booke headers (part 4)
powerpc/booke: Move booke headers (part 5)
powerpc/mm: Increase the pte frag size.
powerpc/mm: Convert 4k hash insert to C
powerpc/mm: update __real_pte to take address as argument
powerpc/mm: make pte page hash index slot 8 bits
powerpc/mm: Don't track subpage valid bit in pte_t
powerpc/mm: Increase the width of #define
powerpc/mm: Convert __hash_page_64K to C
powerpc/mm: Convert 4k insert from asm to C
powerpc/mm: Remove the dependency on pte bit position in asm code
powerpc/mm: Add helper for converting pte bit to hpte bits
powerpc/mm: Move WIMG update to helper.
powerpc/mm: Move hugetlb related headers
powerpc/mm: Move THP headers around
powerpc/mm: Add a _PAGE_PTE bit
.../include/asm/{pte-hash32.h => book3s/32/hash.h} | 6 +-
arch/powerpc/include/asm/book3s/32/pgtable.h | 476 ++++++++++
arch/powerpc/include/asm/book3s/64/hash-4k.h | 132 +++
arch/powerpc/include/asm/book3s/64/hash-64k.h | 285 ++++++
arch/powerpc/include/asm/book3s/64/hash.h | 513 ++++++++++
arch/powerpc/include/asm/book3s/64/pgtable.h | 266 ++++++
arch/powerpc/include/asm/book3s/pgtable.h | 29 +
.../asm/{pgtable-ppc32.h => booke/32/pgtable.h} | 25 +-
arch/powerpc/include/asm/{ => booke/32}/pte-40x.h | 6 +-
arch/powerpc/include/asm/{ => booke/32}/pte-44x.h | 6 +-
arch/powerpc/include/asm/{ => booke/32}/pte-8xx.h | 6 +-
.../include/asm/{ => booke/32}/pte-fsl-booke.h | 6 +-
.../{pgtable-ppc64-4k.h => booke/64/pgtable-4k.h} | 13 +-
.../64/pgtable-64k.h} | 6 +-
.../asm/{pgtable-ppc64.h => booke/64/pgtable.h} | 297 +-----
arch/powerpc/include/asm/booke/pgtable.h | 252 +++++
arch/powerpc/include/asm/{ => booke}/pte-book3e.h | 6 +-
arch/powerpc/include/asm/mmu-hash64.h | 2 +-
arch/powerpc/include/asm/page.h | 75 +-
arch/powerpc/include/asm/pgalloc-32.h | 34 +-
arch/powerpc/include/asm/pgalloc-64.h | 29 +-
arch/powerpc/include/asm/pgtable.h | 200 +---
arch/powerpc/include/asm/pte-common.h | 5 +
arch/powerpc/include/asm/pte-hash64-4k.h | 17 -
arch/powerpc/include/asm/pte-hash64-64k.h | 102 --
arch/powerpc/include/asm/pte-hash64.h | 54 --
arch/powerpc/kernel/exceptions-64s.S | 16 +-
arch/powerpc/mm/Makefile | 9 +-
arch/powerpc/mm/hash64_4k.c | 123 +++
arch/powerpc/mm/hash64_64k.c | 313 ++++++
arch/powerpc/mm/hash_low_64.S | 1003 --------------------
arch/powerpc/mm/hash_native_64.c | 10 +
arch/powerpc/mm/hash_utils_64.c | 105 +-
arch/powerpc/mm/hugepage-hash64.c | 20 +-
arch/powerpc/mm/hugetlbpage-hash64.c | 15 +-
arch/powerpc/mm/hugetlbpage.c | 57 +-
arch/powerpc/mm/pgtable.c | 4 +
arch/powerpc/mm/pgtable_64.c | 28 +-
arch/powerpc/mm/tlb_hash64.c | 2 +-
arch/powerpc/platforms/pseries/lpar.c | 10 +
40 files changed, 2670 insertions(+), 1893 deletions(-)
rename arch/powerpc/include/asm/{pte-hash32.h => book3s/32/hash.h} (93%)
create mode 100644 arch/powerpc/include/asm/book3s/32/pgtable.h
create mode 100644 arch/powerpc/include/asm/book3s/64/hash-4k.h
create mode 100644 arch/powerpc/include/asm/book3s/64/hash-64k.h
create mode 100644 arch/powerpc/include/asm/book3s/64/hash.h
create mode 100644 arch/powerpc/include/asm/book3s/64/pgtable.h
create mode 100644 arch/powerpc/include/asm/book3s/pgtable.h
rename arch/powerpc/include/asm/{pgtable-ppc32.h => booke/32/pgtable.h} (96%)
rename arch/powerpc/include/asm/{ => booke/32}/pte-40x.h (95%)
rename arch/powerpc/include/asm/{ => booke/32}/pte-44x.h (96%)
rename arch/powerpc/include/asm/{ => booke/32}/pte-8xx.h (95%)
rename arch/powerpc/include/asm/{ => booke/32}/pte-fsl-booke.h (89%)
rename arch/powerpc/include/asm/{pgtable-ppc64-4k.h => booke/64/pgtable-4k.h}
(92%)
rename arch/powerpc/include/asm/{pgtable-ppc64-64k.h =>
booke/64/pgtable-64k.h} (90%)
rename arch/powerpc/include/asm/{pgtable-ppc64.h => booke/64/pgtable.h} (57%)
create mode 100644 arch/powerpc/include/asm/booke/pgtable.h
rename arch/powerpc/include/asm/{ => booke}/pte-book3e.h (95%)
delete mode 100644 arch/powerpc/include/asm/pte-hash64-4k.h
delete mode 100644 arch/powerpc/include/asm/pte-hash64-64k.h
delete mode 100644 arch/powerpc/include/asm/pte-hash64.h
create mode 100644 arch/powerpc/mm/hash64_4k.c
create mode 100644 arch/powerpc/mm/hash64_64k.c
delete mode 100644 arch/powerpc/mm/hash_low_64.S
--
2.5.0
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