mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
57fb15c32f
On book3s/64, the only user of hugepd is hash in 4k mode. All other setups (hash-64, radix-4, radix-64) use leaf PMD/PUD. Rework hash-4k to use contiguous PMD and PUD instead. In that setup there are only two huge page sizes: 16M and 16G. 16M sits at PMD level and 16G at PUD level. pte_update doesn't know page size, lets use the same trick as hpte_need_flush() to get page size from segment properties. That's not the most efficient way but let's do that until callers of pte_update() provide page size instead of just a huge flag. Link: https://lkml.kernel.org/r/7448f60a9b3efd396595f4f735d1e0babc5ae379.1719928057.git.christophe.leroy@csgroup.eu Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
24 lines
738 B
C
24 lines
738 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_POWERPC_NOHASH_HUGETLB_E500_H
|
|
#define _ASM_POWERPC_NOHASH_HUGETLB_E500_H
|
|
|
|
void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
|
|
|
|
static inline int check_and_get_huge_psize(int shift)
|
|
{
|
|
if (shift & 1) /* Not a power of 4 */
|
|
return -EINVAL;
|
|
|
|
return shift_to_mmu_psize(shift);
|
|
}
|
|
|
|
static inline pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags)
|
|
{
|
|
unsigned int tsize = shift - _PAGE_PSIZE_SHIFT_OFFSET;
|
|
pte_basic_t val = (tsize << _PAGE_PSIZE_SHIFT) & _PAGE_PSIZE_MSK;
|
|
|
|
return __pte((pte_val(entry) & ~(pte_basic_t)_PAGE_PSIZE_MSK) | val);
|
|
}
|
|
#define arch_make_huge_pte arch_make_huge_pte
|
|
|
|
#endif /* _ASM_POWERPC_NOHASH_HUGETLB_E500_H */
|