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* [PATCH v4 RESEND 0/11] x86/mm: Handle large PAT bit in pud/pmd interfaces
@ 2015-09-17 18:24 Toshi Kani
  2015-09-17 18:24 ` [PATCH v4 RESEND 1/11] x86/vdso32: Define PGTABLE_LEVELS to 32bit VDSO Toshi Kani
                   ` (10 more replies)
  0 siblings, 11 replies; 21+ messages in thread
From: Toshi Kani @ 2015-09-17 18:24 UTC (permalink / raw)
  To: hpa, tglx, mingo
  Cc: akpm, bp, linux-mm, linux-kernel, x86, jgross, konrad.wilk,
	elliott

The PAT bit gets relocated to bit 12 when PUD/PMD mappings are used.  This
bit 12, however, is not covered by PTE_FLAGS_MASK, which is corrently used
by masking pfn and flags for all levels.  This patch-set updates pud/pmd
interfaces and multiple functions to handle the large PAT bit properly.

Patch 1/11-2/11 make changes necessary for patch 3/11 to use P?D_PAGE_MASK.

Patch 3/11-4/11 fix pud/pmd interfaces to handle the PAT bit properly.

Patch 5/11 adds p?d_pgprot() interfaces for PUD/PMD.

Patch 6/11 fixes /sys/kernel/debug/kernel_page_tables to show the PAT bit
properly.

Patch 7/11-10/11 fix multiple functions to handle the large PAT bit properly.

Patch 11/11 fixes the no-change case in try_preserve_large_page() by
leveraging the changes made in patch 9/11.

Note, the PAT bit is first enabled in 4.2-rc1 with WT mapping.  The functions
fixed by patch 7/11-10/11 are not used with WT mapping yet.  These fixes will
protect them from the future use of the PAT bit set.

The patchset is based on the -tip branch.

---
RESEND:
 - Rebased to 4.3-rc1 -tip branch. No conflict.

v4:
 - Add descriptions of the issue fixed by patch 01/11 (Thomas Gleixner).
 - Split patch 03 into two patches, mask changes & pud/pmd interface changes.
   (Thomas Gleixner).

v3:
 - Add patch 4/11 and 6/11-9/11 for multiple interfaces to handle the large
   PAT bit.
 - Add patch 11/11 to fix the same pgprot handling in
   try_preserve_large_page().

v2:
 - Change p?n_pfn() to handle the PAT bit. (Juergen Gross)
 - Mask pfn and flags with P?D_PAGE_MASK. (Juergen Gross)
 - Change p?d_page_vaddr() and p?d_page() to handle the PAT bit.

---
Toshi Kani (11):
  1/11 x86/vdso32: Define PGTABLE_LEVELS to 32bit VDSO
  2/11 x86/asm: Move PUD_PAGE macros to page_types.h
  3/11 x86/asm: Add pud/pmd mask interfaces to handle large PAT bit
  4/11 x86/asm: Fix pud/pmd interfaces to handle large PAT bit
  5/11 x86/asm: Add pud_pgprot() and pmd_pgprot()
  6/11 x86/mm: Fix page table dump to show PAT bit
  7/11 x86/mm: Fix slow_virt_to_phys() to handle large PAT bit
  8/11 x86/mm: Fix gup_huge_p?d() to handle large PAT bit
  9/11 x86/mm: Fix try_preserve_large_page() to handle large PAT bit
 10/11 x86/mm: Fix __split_large_page() to handle large PAT bit
 11/11 x86/mm: Fix no-change case in try_preserve_large_page()

---
 arch/x86/entry/vdso/vdso32/vclock_gettime.c |  2 +
 arch/x86/include/asm/page_64_types.h        |  3 --
 arch/x86/include/asm/page_types.h           |  3 ++
 arch/x86/include/asm/pgtable.h              | 18 ++++---
 arch/x86/include/asm/pgtable_types.h        | 40 +++++++++++++--
 arch/x86/mm/dump_pagetables.c               | 39 +++++++-------
 arch/x86/mm/gup.c                           | 18 +++----
 arch/x86/mm/pageattr.c                      | 79 ++++++++++++++++++-----------
 8 files changed, 131 insertions(+), 71 deletions(-)

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^ permalink raw reply	[flat|nested] 21+ messages in thread

end of thread, other threads:[~2015-11-10  0:44 UTC | newest]

Thread overview: 21+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-09-17 18:24 [PATCH v4 RESEND 0/11] x86/mm: Handle large PAT bit in pud/pmd interfaces Toshi Kani
2015-09-17 18:24 ` [PATCH v4 RESEND 1/11] x86/vdso32: Define PGTABLE_LEVELS to 32bit VDSO Toshi Kani
2015-09-17 18:24 ` [PATCH v4 RESEND 2/11] x86/asm: Move PUD_PAGE macros to page_types.h Toshi Kani
2015-09-17 18:24 ` [PATCH v4 RESEND 3/11] x86/asm: Add pud/pmd mask interfaces to handle large PAT bit Toshi Kani
2015-09-17 18:24 ` [PATCH v4 RESEND 4/11] x86/asm: Fix pud/pmd " Toshi Kani
2015-11-09 18:06   ` Boris Ostrovsky
2015-11-09 19:16     ` Toshi Kani
2015-11-09 19:39       ` Boris Ostrovsky
2015-11-09 20:47         ` Kirill A. Shutemov
2015-11-09 22:36           ` Boris Ostrovsky
2015-11-09 23:18             ` Toshi Kani
2015-11-10  0:40               ` Toshi Kani
2015-11-09 20:10       ` Kirill A. Shutemov
2015-11-09 21:01         ` Toshi Kani
2015-09-17 18:24 ` [PATCH v4 RESEND 5/11] x86/asm: Add pud_pgprot() and pmd_pgprot() Toshi Kani
2015-09-17 18:24 ` [PATCH v4 RESEND 6/11] x86/mm: Fix page table dump to show PAT bit Toshi Kani
2015-09-17 18:24 ` [PATCH v4 RESEND 7/11] x86/mm: Fix slow_virt_to_phys() to handle large " Toshi Kani
2015-09-17 18:24 ` [PATCH v4 RESEND 8/11] x86/mm: Fix gup_huge_p?d() " Toshi Kani
2015-09-17 18:24 ` [PATCH v4 RESEND 9/11] x86/mm: Fix try_preserve_large_page() " Toshi Kani
2015-09-17 18:24 ` [PATCH v4 RESEND 10/11] x86/mm: Fix __split_large_page() " Toshi Kani
2015-09-17 18:24 ` [PATCH v4 RESEND 11/11] x86/mm: Fix no-change case in try_preserve_large_page() Toshi Kani

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