diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2024-07-02 16:51:33 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-07-13 01:52:19 +0300 |
| commit | 57fb15c32f4f6a4f1a58f1fbc58a799c3f975ed8 (patch) | |
| tree | f7eedba4527abcdb48867a0de8b40b3f7ae233af /arch/powerpc/include/asm/book3s/64/hugetlb.h | |
| parent | 7c44202e36097e23240025298ccd1fe4eacfd94e (diff) | |
| download | linux-57fb15c32f4f6a4f1a58f1fbc58a799c3f975ed8.tar.xz | |
powerpc/64s: use contiguous PMD/PUD instead of HUGEPD
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>
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/hugetlb.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hugetlb.h | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/hugetlb.h b/arch/powerpc/include/asm/book3s/64/hugetlb.h index aa1c67c8bfc8..f0bba9c5f9c3 100644 --- a/arch/powerpc/include/asm/book3s/64/hugetlb.h +++ b/arch/powerpc/include/asm/book3s/64/hugetlb.h @@ -49,9 +49,6 @@ static inline bool gigantic_page_runtime_supported(void) return true; } -/* hugepd entry valid bit */ -#define HUGEPD_VAL_BITS (0x8000000000000000UL) - #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep); @@ -60,29 +57,7 @@ extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t old_pte, pte_t new_pte); -/* - * This should work for other subarchs too. But right now we use the - * new format only for 64bit book3s - */ -static inline pte_t *hugepd_page(hugepd_t hpd) -{ - BUG_ON(!hugepd_ok(hpd)); - /* - * We have only four bits to encode, MMU page size - */ - BUILD_BUG_ON((MMU_PAGE_COUNT - 1) > 0xf); - return __va(hpd_val(hpd) & HUGEPD_ADDR_MASK); -} - -static inline unsigned int hugepd_mmu_psize(hugepd_t hpd) -{ - return (hpd_val(hpd) & HUGEPD_SHIFT_MASK) >> 2; -} -static inline unsigned int hugepd_shift(hugepd_t hpd) -{ - return mmu_psize_to_shift(hugepd_mmu_psize(hpd)); -} static inline void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr) { @@ -90,19 +65,6 @@ static inline void flush_hugetlb_page(struct vm_area_struct *vma, return radix__flush_hugetlb_page(vma, vmaddr); } -static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr, - unsigned int pdshift) -{ - unsigned long idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(hpd); - - return hugepd_page(hpd) + idx; -} - -static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift) -{ - *hpdp = __hugepd(__pa(new) | HUGEPD_VAL_BITS | (shift_to_mmu_psize(pshift) << 2)); -} - void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); static inline int check_and_get_huge_psize(int shift) |