linux/arch/sparc/mm
Christophe Leroy 79c1c594f4 mm/hugetlb: change parameters of arch_make_huge_pte()
Patch series "Subject: [PATCH v2 0/5] Implement huge VMAP and VMALLOC on powerpc 8xx", v2.

This series implements huge VMAP and VMALLOC on powerpc 8xx.

Powerpc 8xx has 4 page sizes:
- 4k
- 16k
- 512k
- 8M

At the time being, vmalloc and vmap only support huge pages which are
leaf at PMD level.

Here the PMD level is 4M, it doesn't correspond to any supported
page size.

For now, implement use of 16k and 512k pages which is done
at PTE level.

Support of 8M pages will be implemented later, it requires use of
hugepd tables.

To allow this, the architecture provides two functions:
- arch_vmap_pte_range_map_size() which tells vmap_pte_range() what
page size to use. A stub returning PAGE_SIZE is provided when the
architecture doesn't provide this function.
- arch_vmap_pte_supported_shift() which tells __vmalloc_node_range()
what page shift to use for a given area size. A stub returning
PAGE_SHIFT is provided when the architecture doesn't provide this
function.

This patch (of 5):

At the time being, arch_make_huge_pte() has the following prototype:

  pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
			   struct page *page, int writable);

vma is used to get the pages shift or size.
vma is also used on Sparc to get vm_flags.
page is not used.
writable is not used.

In order to use this function without a vma, replace vma by shift and
flags.  Also remove the used parameters.

Link: https://lkml.kernel.org/r/cover.1620795204.git.christophe.leroy@csgroup.eu
Link: https://lkml.kernel.org/r/f4633ac6a7da2f22f31a04a89e0a7026bb78b15b.1620795204.git.christophe.leroy@csgroup.eu
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Uladzislau Rezki <uladzislau.rezki@sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-06-30 20:47:26 -07:00
..
fault_32.c sparc32: switch to generic extables 2021-01-03 20:05:18 -05:00
fault_64.c mm/sparc64: use general page fault accounting 2020-08-12 10:58:04 -07:00
hugetlbpage.c mm/hugetlb: change parameters of arch_make_huge_pte() 2021-06-30 20:47:26 -07:00
hypersparc.S sparc32: mm: Restructure sparc32 MMU page-table layout 2020-05-13 15:32:00 -07:00
init_32.c mm: move mem_init_print_info() into mm_init() 2021-04-30 11:20:42 -07:00
init_64.c mm: memory_hotplug: factor out bootmem core functions to bootmem_info.c 2021-06-30 20:47:25 -07:00
init_64.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
io-unit.c dma-mapping: split <linux/dma-mapping.h> 2020-10-06 07:07:03 +02:00
iommu.c dma-mapping: split <linux/dma-mapping.h> 2020-10-06 07:07:03 +02:00
leon_mm.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile sparc32: switch to generic extables 2021-01-03 20:05:18 -05:00
mm_32.h sparc32: kill lookup_fault() 2021-01-03 20:05:14 -05:00
srmmu_access.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
srmmu.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2021-02-23 15:09:53 -08:00
swift.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tlb.c mm: move page_mapping_file to pagemap.h 2021-04-30 11:20:37 -07:00
tsb.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
tsunami.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ultra.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
viking.S sparc32: mm: Restructure sparc32 MMU page-table layout 2020-05-13 15:32:00 -07:00