| Message ID | 1572850587-20314-6-git-send-email-rppt@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mm: remove __ARCH_HAS_4LEVEL_HACK | expand |
Hi Mike, On Mon, Nov 4, 2019 at 7:57 AM Mike Rapoport <rppt@kernel.org> wrote: > From: Mike Rapoport <rppt@linux.ibm.com> > m68k has two or three levels of page tables and can use appropriate > pgtable-nopXd and folding of the upper layers. > > Replace usage of include/asm-generic/4level-fixup.h and explicit > definitions of __PAGETABLE_PxD_FOLDED in m68k with > include/asm-generic/pgtable-nopmd.h for two-level configurations and with > include/asm-generic/pgtable-nopud.h for three-lelve configurations and > adjust page table manipulation macros and functions accordingly. > > Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> > Acked-by: Greg Ungerer <gerg@linux-m68k.org> Thanks for your patch! The build error reported for v1 by kbuild test robot when building for sun3x is still there (m68k defconfig or sun3x_defconfig): arch/m68k/sun3x/dvma.c: In function ‘dvma_map_cpu’: arch/m68k/sun3x/dvma.c:98:33: error: passing argument 2 of ‘pmd_alloc’ from incompatible pointer type [-Werror=incompatible-pointer-types] if((pmd = pmd_alloc(&init_mm, pgd, vaddr)) == NULL) { ^~~ In file included from arch/m68k/sun3x/dvma.c:17: include/linux/mm.h:1875:61: note: expected ‘pud_t *’ {aka ‘struct <anonymous> *’} but argument is of type ‘pgd_t *’ {aka ‘struct <anonymous> *’} static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address) ~~~~~~~^~~ This indeed boots fine on ARAnyM, which emulates on 68040. It would be good to have some boot testing on '020/030, too. > --- a/arch/m68k/mm/kmap.c > +++ b/arch/m68k/mm/kmap.c > @@ -196,17 +198,21 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla > printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr); > #endif > pgd_dir = pgd_offset_k(virtaddr); > - pmd_dir = pmd_alloc(&init_mm, pgd_dir, virtaddr); > + p4d_dir = p4d_offset(pgd_dir, virtaddr); > + pud_dir = pud_offset(p4d_dir, virtaddr); > + pmd_dir = pmd_alloc(&init_mm, pud_dir, virtaddr); > if (!pmd_dir) { > printk("ioremap: no mem for pmd_dir\n"); > return NULL; > } > > if (CPU_IS_020_OR_030) { > +#if CONFIG_PGTABLE_LEVELS == 3 This check puzzled me a bit: when we get here, CONFIG_PGTABLE_LEVELS is always true. However, the check cannot be removed, as the code it protects fails to compile when building for Coldfire. Perhaps this can be made more clear by reverting the order? I.e. #if CONFIG_PGTABLE_LEVELS == 3 if (CPU_IS_020_OR_030) { ... } else #endif { Or is there some better way? > pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr; > physaddr += PTRTREESIZE; > virtaddr += PTRTREESIZE; > size -= PTRTREESIZE; > +#endif > } else { > pte_dir = pte_alloc_kernel(pmd_dir, virtaddr); > if (!pte_dir) { > @@ -258,19 +264,24 @@ void __iounmap(void *addr, unsigned long size) > { > unsigned long virtaddr = (unsigned long)addr; > pgd_t *pgd_dir; > + p4d_t *p4d_dir; > + pud_t *pud_dir; > pmd_t *pmd_dir; > pte_t *pte_dir; > > while ((long)size > 0) { > pgd_dir = pgd_offset_k(virtaddr); > - if (pgd_bad(*pgd_dir)) { > - printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir)); > - pgd_clear(pgd_dir); > + p4d_dir = p4d_offset(pgd_dir, virtaddr); > + pud_dir = pud_offset(p4d_dir, virtaddr); > + if (pud_bad(*pud_dir)) { > + printk("iounmap: bad pgd(%08lx)\n", pud_val(*pud_dir)); > + pud_clear(pud_dir); > return; > } > - pmd_dir = pmd_offset(pgd_dir, virtaddr); > + pmd_dir = pmd_offset(pud_dir, virtaddr); > > if (CPU_IS_020_OR_030) { > +#if CONFIG_PGTABLE_LEVELS == 3 Likewise. > int pmd_off = (virtaddr/PTRTREESIZE) & 15; > int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK; > > @@ -341,14 +355,17 @@ void kernel_set_cachemode(void *addr, unsigned long size, int cmode) > > while ((long)size > 0) { > pgd_dir = pgd_offset_k(virtaddr); > - if (pgd_bad(*pgd_dir)) { > - printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir)); > - pgd_clear(pgd_dir); > + p4d_dir = p4d_offset(pgd_dir, virtaddr); > + pud_dir = pud_offset(p4d_dir, virtaddr); > + if (pud_bad(*pud_dir)) { > + printk("iocachemode: bad pud(%08lx)\n", pud_val(*pud_dir)); > + pud_clear(pud_dir); > return; > } > - pmd_dir = pmd_offset(pgd_dir, virtaddr); > + pmd_dir = pmd_offset(pud_dir, virtaddr); > > if (CPU_IS_020_OR_030) { > +#if CONFIG_PGTABLE_LEVELS == 3 Likewise > int pmd_off = (virtaddr/PTRTREESIZE) & 15; > > if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) { Gr{oetje,eeting}s, Geert
On Mon, Nov 04, 2019 at 09:53:34AM +0100, Geert Uytterhoeven wrote: > Hi Mike, > > On Mon, Nov 4, 2019 at 7:57 AM Mike Rapoport <rppt@kernel.org> wrote: > > From: Mike Rapoport <rppt@linux.ibm.com> > > m68k has two or three levels of page tables and can use appropriate > > pgtable-nopXd and folding of the upper layers. > > > > Replace usage of include/asm-generic/4level-fixup.h and explicit > > definitions of __PAGETABLE_PxD_FOLDED in m68k with > > include/asm-generic/pgtable-nopmd.h for two-level configurations and with > > include/asm-generic/pgtable-nopud.h for three-lelve configurations and > > adjust page table manipulation macros and functions accordingly. > > > > Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> > > Acked-by: Greg Ungerer <gerg@linux-m68k.org> > > Thanks for your patch! > > The build error reported for v1 by kbuild test robot when building for > sun3x is still there (m68k defconfig or sun3x_defconfig): > > arch/m68k/sun3x/dvma.c: In function ‘dvma_map_cpu’: > arch/m68k/sun3x/dvma.c:98:33: error: passing argument 2 of > ‘pmd_alloc’ from incompatible pointer type > [-Werror=incompatible-pointer-types] > if((pmd = pmd_alloc(&init_mm, pgd, vaddr)) == NULL) { > ^~~ > In file included from arch/m68k/sun3x/dvma.c:17: > include/linux/mm.h:1875:61: note: expected ‘pud_t *’ {aka ‘struct > <anonymous> *’} but argument is of type ‘pgd_t *’ {aka ‘struct > <anonymous> *’} > static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, > unsigned long address) > ~~~~~~~^~~ The initial report was against older mmotm (base: git://git.cmpxchg.org/linux-mmotm.git master) and I presumed this was the cause of the error. Will fix in v4. > This indeed boots fine on ARAnyM, which emulates on 68040. > It would be good to have some boot testing on '020/030, too. To be honest, I have no idea how to to that :) > > --- a/arch/m68k/mm/kmap.c > > +++ b/arch/m68k/mm/kmap.c > > > @@ -196,17 +198,21 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla > > printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr); > > #endif > > pgd_dir = pgd_offset_k(virtaddr); > > - pmd_dir = pmd_alloc(&init_mm, pgd_dir, virtaddr); > > + p4d_dir = p4d_offset(pgd_dir, virtaddr); > > + pud_dir = pud_offset(p4d_dir, virtaddr); > > + pmd_dir = pmd_alloc(&init_mm, pud_dir, virtaddr); > > if (!pmd_dir) { > > printk("ioremap: no mem for pmd_dir\n"); > > return NULL; > > } > > > > if (CPU_IS_020_OR_030) { > > +#if CONFIG_PGTABLE_LEVELS == 3 > > This check puzzled me a bit: when we get here, CONFIG_PGTABLE_LEVELS is > always true. > However, the check cannot be removed, as the code it protects fails to compile > when building for Coldfire. > > Perhaps this can be made more clear by reverting the order? > I.e. > > #if CONFIG_PGTABLE_LEVELS == 3 > if (CPU_IS_020_OR_030) { > ... > } else > #endif > { > > Or is there some better way? I think reverting the order is fine. Here it's a bit ugly because of '} else {', but for the other cases below it will fine. > > pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr; > > physaddr += PTRTREESIZE; > > virtaddr += PTRTREESIZE; > > size -= PTRTREESIZE; > > +#endif > > } else { > > pte_dir = pte_alloc_kernel(pmd_dir, virtaddr); > > if (!pte_dir) { > > @@ -258,19 +264,24 @@ void __iounmap(void *addr, unsigned long size) > > { > > unsigned long virtaddr = (unsigned long)addr; > > pgd_t *pgd_dir; > > + p4d_t *p4d_dir; > > + pud_t *pud_dir; > > pmd_t *pmd_dir; > > pte_t *pte_dir; > > > > while ((long)size > 0) { > > pgd_dir = pgd_offset_k(virtaddr); > > - if (pgd_bad(*pgd_dir)) { > > - printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir)); > > - pgd_clear(pgd_dir); > > + p4d_dir = p4d_offset(pgd_dir, virtaddr); > > + pud_dir = pud_offset(p4d_dir, virtaddr); > > + if (pud_bad(*pud_dir)) { > > + printk("iounmap: bad pgd(%08lx)\n", pud_val(*pud_dir)); > > + pud_clear(pud_dir); > > return; > > } > > - pmd_dir = pmd_offset(pgd_dir, virtaddr); > > + pmd_dir = pmd_offset(pud_dir, virtaddr); > > > > if (CPU_IS_020_OR_030) { > > +#if CONFIG_PGTABLE_LEVELS == 3 > > Likewise. > > > int pmd_off = (virtaddr/PTRTREESIZE) & 15; > > int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK; > > > > > @@ -341,14 +355,17 @@ void kernel_set_cachemode(void *addr, unsigned long size, int cmode) > > > > while ((long)size > 0) { > > pgd_dir = pgd_offset_k(virtaddr); > > - if (pgd_bad(*pgd_dir)) { > > - printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir)); > > - pgd_clear(pgd_dir); > > + p4d_dir = p4d_offset(pgd_dir, virtaddr); > > + pud_dir = pud_offset(p4d_dir, virtaddr); > > + if (pud_bad(*pud_dir)) { > > + printk("iocachemode: bad pud(%08lx)\n", pud_val(*pud_dir)); > > + pud_clear(pud_dir); > > return; > > } > > - pmd_dir = pmd_offset(pgd_dir, virtaddr); > > + pmd_dir = pmd_offset(pud_dir, virtaddr); > > > > if (CPU_IS_020_OR_030) { > > +#if CONFIG_PGTABLE_LEVELS == 3 > > Likewise > > > int pmd_off = (virtaddr/PTRTREESIZE) & 15; > > > > if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) { > > Gr{oetje,eeting}s, > > Geert > > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org > > In personal conversations with technical people, I call myself a hacker. But > when I'm talking to journalists I just say "programmer" or something like that. > -- Linus Torvalds
Hi Mike, On Mon, Nov 4, 2019 at 10:48 AM Mike Rapoport <rppt@kernel.org> wrote: > On Mon, Nov 04, 2019 at 09:53:34AM +0100, Geert Uytterhoeven wrote: > > On Mon, Nov 4, 2019 at 7:57 AM Mike Rapoport <rppt@kernel.org> wrote: > > > From: Mike Rapoport <rppt@linux.ibm.com> > > > m68k has two or three levels of page tables and can use appropriate > > > pgtable-nopXd and folding of the upper layers. > > > > > > Replace usage of include/asm-generic/4level-fixup.h and explicit > > > definitions of __PAGETABLE_PxD_FOLDED in m68k with > > > include/asm-generic/pgtable-nopmd.h for two-level configurations and with > > > include/asm-generic/pgtable-nopud.h for three-lelve configurations and > > > adjust page table manipulation macros and functions accordingly. > > > > > > Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> > > > Acked-by: Greg Ungerer <gerg@linux-m68k.org> > > > > Thanks for your patch! > > > > The build error reported for v1 by kbuild test robot when building for > > sun3x is still there (m68k defconfig or sun3x_defconfig): > > > > arch/m68k/sun3x/dvma.c: In function ‘dvma_map_cpu’: > > arch/m68k/sun3x/dvma.c:98:33: error: passing argument 2 of > > ‘pmd_alloc’ from incompatible pointer type > > [-Werror=incompatible-pointer-types] > > if((pmd = pmd_alloc(&init_mm, pgd, vaddr)) == NULL) { > > ^~~ > > In file included from arch/m68k/sun3x/dvma.c:17: > > include/linux/mm.h:1875:61: note: expected ‘pud_t *’ {aka ‘struct > > <anonymous> *’} but argument is of type ‘pgd_t *’ {aka ‘struct > > <anonymous> *’} > > static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, > > unsigned long address) > > ~~~~~~~^~~ > > The initial report was against older mmotm (base: > git://git.cmpxchg.org/linux-mmotm.git master) and I presumed this was the > cause of the error. Will fix in v4. OK, thanks! My tree is based on m68k/master, which does not include the mmotm tree, and should be fairly similar to plain v5.4-rc6. > > This indeed boots fine on ARAnyM, which emulates on 68040. > > It would be good to have some boot testing on '020/030, too. > > To be honest, I have no idea how to to that :) Sure. This was more a request for the fellow m68k users. But don't worry too much about it. If it breaks '020/'030, we can fix that later. Thanks! Gr{oetje,eeting}s, Geert
Hi Geert, Am 04.11.2019 um 22:53 schrieb Geert Uytterhoeven: >>> This indeed boots fine on ARAnyM, which emulates on 68040. >>> It would be good to have some boot testing on '020/030, too. >> >> To be honest, I have no idea how to to that :) > > Sure. This was more a request for the fellow m68k users. I heard you :-) Still doing more regression testing on the latest SCSI fix, but I can schedule this next. Cheers, Michael > But don't worry too much about it. If it breaks '020/'030, we can fix > that later. > > Thanks! > > Gr{oetje,eeting}s, > > Geert >
Hi Geert, Am 04.11.2019 um 22:53 schrieb Geert Uytterhoeven: >>> This indeed boots fine on ARAnyM, which emulates on 68040. >>> It would be good to have some boot testing on '020/030, too. >> >> To be honest, I have no idea how to to that :) > > Sure. This was more a request for the fellow m68k users. > But don't worry too much about it. If it breaks '020/'030, we can fix > that later. Boots fine on 030, too. Cheers, Michael
Hi Michael, On Fri, Nov 8, 2019 at 5:30 AM Michael Schmitz <schmitzmic@gmail.com> wrote: > Am 04.11.2019 um 22:53 schrieb Geert Uytterhoeven: > >>> This indeed boots fine on ARAnyM, which emulates on 68040. > >>> It would be good to have some boot testing on '020/030, too. > >> > >> To be honest, I have no idea how to to that :) > > > > Sure. This was more a request for the fellow m68k users. > > But don't worry too much about it. If it breaks '020/'030, we can fix > > that later. > > Boots fine on 030, too. Thanks a lot for testing! Gr{oetje,eeting}s, Geert
diff --git a/arch/m68k/include/asm/mcf_pgalloc.h b/arch/m68k/include/asm/mcf_pgalloc.h index b34d44d..82ec54c 100644 --- a/arch/m68k/include/asm/mcf_pgalloc.h +++ b/arch/m68k/include/asm/mcf_pgalloc.h @@ -28,9 +28,6 @@ extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address) return (pmd_t *) pgd; } -#define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); }) -#define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); }) - #define pmd_populate(mm, pmd, page) (pmd_val(*pmd) = \ (unsigned long)(page_address(page))) @@ -45,8 +42,6 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page, __free_page(page); } -#define __pmd_free_tlb(tlb, pmd, address) do { } while (0) - static inline struct page *pte_alloc_one(struct mm_struct *mm) { struct page *page = alloc_pages(GFP_DMA, 0); @@ -100,6 +95,4 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm) return new_pgd; } -#define pgd_populate(mm, pmd, pte) BUG() - #endif /* M68K_MCF_PGALLOC_H */ diff --git a/arch/m68k/include/asm/mcf_pgtable.h b/arch/m68k/include/asm/mcf_pgtable.h index 5d5502c..b9f45ae 100644 --- a/arch/m68k/include/asm/mcf_pgtable.h +++ b/arch/m68k/include/asm/mcf_pgtable.h @@ -198,17 +198,9 @@ static inline int pmd_bad2(pmd_t *pmd) { return 0; } #define pmd_present(pmd) (!pmd_none2(&(pmd))) static inline void pmd_clear(pmd_t *pmdp) { pmd_val(*pmdp) = 0; } -static inline int pgd_none(pgd_t pgd) { return 0; } -static inline int pgd_bad(pgd_t pgd) { return 0; } -static inline int pgd_present(pgd_t pgd) { return 1; } -static inline void pgd_clear(pgd_t *pgdp) {} - #define pte_ERROR(e) \ printk(KERN_ERR "%s:%d: bad pte %08lx.\n", \ __FILE__, __LINE__, pte_val(e)) -#define pmd_ERROR(e) \ - printk(KERN_ERR "%s:%d: bad pmd %08lx.\n", \ - __FILE__, __LINE__, pmd_val(e)) #define pgd_ERROR(e) \ printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \ __FILE__, __LINE__, pgd_val(e)) @@ -340,14 +332,6 @@ extern pgd_t kernel_pg_dir[PTRS_PER_PGD]; #define pgd_offset_k(address) pgd_offset(&init_mm, address) /* - * Find an entry in the second-level pagetable. - */ -static inline pmd_t *pmd_offset(pgd_t *pgd, unsigned long address) -{ - return (pmd_t *) pgd; -} - -/* * Find an entry in the third-level pagetable. */ #define __pte_offset(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) @@ -360,12 +344,16 @@ static inline pmd_t *pmd_offset(pgd_t *pgd, unsigned long address) static inline void nocache_page(void *vaddr) { pgd_t *dir; + p4d_t *p4dp; + pud_t *pudp; pmd_t *pmdp; pte_t *ptep; unsigned long addr = (unsigned long) vaddr; dir = pgd_offset_k(addr); - pmdp = pmd_offset(dir, addr); + p4dp = p4d_offset(dir, addr); + pudp = pud_offset(p4dp, addr); + pmdp = pmd_offset(pudp, addr); ptep = pte_offset_kernel(pmdp, addr); *ptep = pte_mknocache(*ptep); } @@ -376,12 +364,16 @@ static inline void nocache_page(void *vaddr) static inline void cache_page(void *vaddr) { pgd_t *dir; + p4d_t *p4dp; + pud_t *pudp; pmd_t *pmdp; pte_t *ptep; unsigned long addr = (unsigned long) vaddr; dir = pgd_offset_k(addr); - pmdp = pmd_offset(dir, addr); + p4dp = p4d_offset(dir, addr); + pudp = pud_offset(p4dp, addr); + pmdp = pmd_offset(pudp, addr); ptep = pte_offset_kernel(pmdp, addr); *ptep = pte_mkcache(*ptep); } diff --git a/arch/m68k/include/asm/mmu_context.h b/arch/m68k/include/asm/mmu_context.h index f5b1852..cac9f28 100644 --- a/arch/m68k/include/asm/mmu_context.h +++ b/arch/m68k/include/asm/mmu_context.h @@ -100,6 +100,8 @@ static inline void load_ksp_mmu(struct task_struct *task) struct mm_struct *mm; int asid; pgd_t *pgd; + p4d_t *p4d; + pud_t *pud; pmd_t *pmd; pte_t *pte; unsigned long mmuar; @@ -127,7 +129,15 @@ static inline void load_ksp_mmu(struct task_struct *task) if (pgd_none(*pgd)) goto bug; - pmd = pmd_offset(pgd, mmuar); + p4d = p4d_offset(pgd, mmuar); + if (p4d_none(*p4d)) + goto bug; + + pud = pud_offset(p4d, mmuar); + if (pud_none(*pud)) + goto bug; + + pmd = pmd_offset(pud, mmuar); if (pmd_none(*pmd)) goto bug; diff --git a/arch/m68k/include/asm/motorola_pgalloc.h b/arch/m68k/include/asm/motorola_pgalloc.h index acab315..ff9cc40 100644 --- a/arch/m68k/include/asm/motorola_pgalloc.h +++ b/arch/m68k/include/asm/motorola_pgalloc.h @@ -106,9 +106,9 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page } #define pmd_pgtable(pmd) pmd_page(pmd) -static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd) +static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) { - pgd_set(pgd, pmd); + pud_set(pud, pmd); } #endif /* _MOTOROLA_PGALLOC_H */ diff --git a/arch/m68k/include/asm/motorola_pgtable.h b/arch/m68k/include/asm/motorola_pgtable.h index 7f66a7b..62bedc6 100644 --- a/arch/m68k/include/asm/motorola_pgtable.h +++ b/arch/m68k/include/asm/motorola_pgtable.h @@ -117,14 +117,14 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep) } } -static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp) +static inline void pud_set(pud_t *pudp, pmd_t *pmdp) { - pgd_val(*pgdp) = _PAGE_TABLE | _PAGE_ACCESSED | __pa(pmdp); + pud_val(*pudp) = _PAGE_TABLE | _PAGE_ACCESSED | __pa(pmdp); } #define __pte_page(pte) ((unsigned long)__va(pte_val(pte) & PAGE_MASK)) #define __pmd_page(pmd) ((unsigned long)__va(pmd_val(pmd) & _TABLE_MASK)) -#define __pgd_page(pgd) ((unsigned long)__va(pgd_val(pgd) & _TABLE_MASK)) +#define pud_page_vaddr(pud) ((unsigned long)__va(pud_val(pud) & _TABLE_MASK)) #define pte_none(pte) (!pte_val(pte)) @@ -147,11 +147,11 @@ static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp) #define pmd_page(pmd) virt_to_page(__va(pmd_val(pmd))) -#define pgd_none(pgd) (!pgd_val(pgd)) -#define pgd_bad(pgd) ((pgd_val(pgd) & _DESCTYPE_MASK) != _PAGE_TABLE) -#define pgd_present(pgd) (pgd_val(pgd) & _PAGE_TABLE) -#define pgd_clear(pgdp) ({ pgd_val(*pgdp) = 0; }) -#define pgd_page(pgd) (mem_map + ((unsigned long)(__va(pgd_val(pgd)) - PAGE_OFFSET) >> PAGE_SHIFT)) +#define pud_none(pud) (!pud_val(pud)) +#define pud_bad(pud) ((pud_val(pud) & _DESCTYPE_MASK) != _PAGE_TABLE) +#define pud_present(pud) (pud_val(pud) & _PAGE_TABLE) +#define pud_clear(pudp) ({ pud_val(*pudp) = 0; }) +#define pud_page(pud) (mem_map + ((unsigned long)(__va(pud_val(pud)) - PAGE_OFFSET) >> PAGE_SHIFT)) #define pte_ERROR(e) \ printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) @@ -209,9 +209,9 @@ static inline pgd_t *pgd_offset_k(unsigned long address) /* Find an entry in the second-level page table.. */ -static inline pmd_t *pmd_offset(pgd_t *dir, unsigned long address) +static inline pmd_t *pmd_offset(pud_t *dir, unsigned long address) { - return (pmd_t *)__pgd_page(*dir) + ((address >> PMD_SHIFT) & (PTRS_PER_PMD-1)); + return (pmd_t *)pud_page_vaddr(*dir) + ((address >> PMD_SHIFT) & (PTRS_PER_PMD-1)); } /* Find an entry in the third-level page table.. */ @@ -239,11 +239,15 @@ static inline void nocache_page(void *vaddr) if (CPU_IS_040_OR_060) { pgd_t *dir; + p4d_t *p4dp; + pud_t *pudp; pmd_t *pmdp; pte_t *ptep; dir = pgd_offset_k(addr); - pmdp = pmd_offset(dir, addr); + p4dp = p4d_offset(dir, addr); + pudp = pud_offset(p4dp, addr); + pmdp = pmd_offset(pudp, addr); ptep = pte_offset_kernel(pmdp, addr); *ptep = pte_mknocache(*ptep); } @@ -255,11 +259,15 @@ static inline void cache_page(void *vaddr) if (CPU_IS_040_OR_060) { pgd_t *dir; + p4d_t *p4dp; + pud_t *pudp; pmd_t *pmdp; pte_t *ptep; dir = pgd_offset_k(addr); - pmdp = pmd_offset(dir, addr); + p4dp = p4d_offset(dir, addr); + pudp = pud_offset(p4dp, addr); + pmdp = pmd_offset(pudp, addr); ptep = pte_offset_kernel(pmdp, addr); *ptep = pte_mkcache(*ptep); } diff --git a/arch/m68k/include/asm/page.h b/arch/m68k/include/asm/page.h index 700d819..05e1e1e 100644 --- a/arch/m68k/include/asm/page.h +++ b/arch/m68k/include/asm/page.h @@ -21,19 +21,22 @@ /* * These are used to make use of C type-checking.. */ -typedef struct { unsigned long pte; } pte_t; +#if !defined(CONFIG_MMU) || CONFIG_PGTABLE_LEVELS == 3 typedef struct { unsigned long pmd[16]; } pmd_t; +#define pmd_val(x) ((&x)->pmd[0]) +#define __pmd(x) ((pmd_t) { { (x) }, }) +#endif + +typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; typedef struct page *pgtable_t; #define pte_val(x) ((x).pte) -#define pmd_val(x) ((&x)->pmd[0]) #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) } ) -#define __pmd(x) ((pmd_t) { { (x) }, }) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) diff --git a/arch/m68k/include/asm/pgtable_mm.h b/arch/m68k/include/asm/pgtable_mm.h index 646c174f..2bf5c35 100644 --- a/arch/m68k/include/asm/pgtable_mm.h +++ b/arch/m68k/include/asm/pgtable_mm.h @@ -2,7 +2,12 @@ #ifndef _M68K_PGTABLE_H #define _M68K_PGTABLE_H -#include <asm-generic/4level-fixup.h> + +#if defined(CONFIG_SUN3) || defined(CONFIG_COLDFIRE) +#include <asm-generic/pgtable-nopmd.h> +#else +#include <asm-generic/pgtable-nopud.h> +#endif #include <asm/setup.h> @@ -30,9 +35,7 @@ /* PMD_SHIFT determines the size of the area a second-level page table can map */ -#ifdef CONFIG_SUN3 -#define PMD_SHIFT 17 -#else +#if CONFIG_PGTABLE_LEVELS == 3 #define PMD_SHIFT 22 #endif #define PMD_SIZE (1UL << PMD_SHIFT) diff --git a/arch/m68k/include/asm/sun3_pgalloc.h b/arch/m68k/include/asm/sun3_pgalloc.h index 8561211..11b95da 100644 --- a/arch/m68k/include/asm/sun3_pgalloc.h +++ b/arch/m68k/include/asm/sun3_pgalloc.h @@ -17,8 +17,6 @@ extern const char bad_pmd_string[]; -#define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) - #define __pte_free_tlb(tlb,pte,addr) \ do { \ pgtable_pte_page_dtor(pte); \ @@ -41,7 +39,6 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page * inside the pgd, so has no extra memory associated with it. */ #define pmd_free(mm, x) do { } while (0) -#define __pmd_free_tlb(tlb, x, addr) do { } while (0) static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) { @@ -58,6 +55,4 @@ static inline pgd_t * pgd_alloc(struct mm_struct *mm) return new_pgd; } -#define pgd_populate(mm, pmd, pte) BUG() - #endif /* SUN3_PGALLOC_H */ diff --git a/arch/m68k/include/asm/sun3_pgtable.h b/arch/m68k/include/asm/sun3_pgtable.h index c987d50..bc41552 100644 --- a/arch/m68k/include/asm/sun3_pgtable.h +++ b/arch/m68k/include/asm/sun3_pgtable.h @@ -110,11 +110,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) #define pmd_set(pmdp,ptep) do {} while (0) -static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp) -{ - pgd_val(*pgdp) = virt_to_phys(pmdp); -} - #define __pte_page(pte) \ ((unsigned long) __va ((pte_val (pte) & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT)) #define __pmd_page(pmd) \ @@ -145,16 +140,9 @@ static inline int pmd_present2 (pmd_t *pmd) { return pmd_val (*pmd) & SUN3_PMD_V #define pmd_present(pmd) (!pmd_none2(&(pmd))) static inline void pmd_clear (pmd_t *pmdp) { pmd_val (*pmdp) = 0; } -static inline int pgd_none (pgd_t pgd) { return 0; } -static inline int pgd_bad (pgd_t pgd) { return 0; } -static inline int pgd_present (pgd_t pgd) { return 1; } -static inline void pgd_clear (pgd_t *pgdp) {} - #define pte_ERROR(e) \ pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) -#define pmd_ERROR(e) \ - pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) #define pgd_ERROR(e) \ pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) @@ -194,12 +182,6 @@ extern pgd_t kernel_pg_dir[PTRS_PER_PGD]; /* Find an entry in a kernel pagetable directory. */ #define pgd_offset_k(address) pgd_offset(&init_mm, address) -/* Find an entry in the second-level pagetable. */ -static inline pmd_t *pmd_offset (pgd_t *pgd, unsigned long address) -{ - return (pmd_t *) pgd; -} - /* Find an entry in the third-level pagetable. */ #define pte_index(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE-1)) #define pte_offset_kernel(pmd, address) ((pte_t *) __pmd_page(*pmd) + pte_index(address)) diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c index 6363ec8..18a4de7 100644 --- a/arch/m68k/kernel/sys_m68k.c +++ b/arch/m68k/kernel/sys_m68k.c @@ -465,6 +465,8 @@ sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5, for (;;) { struct mm_struct *mm = current->mm; pgd_t *pgd; + p4d_t *p4d; + pud_t *pud; pmd_t *pmd; pte_t *pte; spinlock_t *ptl; @@ -474,7 +476,13 @@ sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5, pgd = pgd_offset(mm, (unsigned long)mem); if (!pgd_present(*pgd)) goto bad_access; - pmd = pmd_offset(pgd, (unsigned long)mem); + p4d = p4d_offset(pgd, (unsigned long)mem); + if (!p4d_present(*p4d)) + goto bad_access; + pud = pud_offset(p4d, (unsigned long)mem); + if (!pud_present(*pud)) + goto bad_access; + pmd = pmd_offset(pud, (unsigned long)mem); if (!pmd_present(*pmd)) goto bad_access; pte = pte_offset_map_lock(mm, pmd, (unsigned long)mem, &ptl); diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c index 778cacb..27c453f 100644 --- a/arch/m68k/mm/init.c +++ b/arch/m68k/mm/init.c @@ -130,8 +130,10 @@ static inline void init_pointer_tables(void) /* insert pointer tables allocated so far into the tablelist */ init_pointer_table((unsigned long)kernel_pg_dir); for (i = 0; i < PTRS_PER_PGD; i++) { - if (pgd_present(kernel_pg_dir[i])) - init_pointer_table(__pgd_page(kernel_pg_dir[i])); + pud_t *pud = (pud_t *)(&kernel_pg_dir[i]); + + if (pud_present(*pud)) + init_pointer_table(pgd_page_vaddr(kernel_pg_dir[i])); } /* insert also pointer table that we used to unmap the zero page */ diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c index 40a3b32..9f687da 100644 --- a/arch/m68k/mm/kmap.c +++ b/arch/m68k/mm/kmap.c @@ -110,6 +110,8 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla unsigned long virtaddr, retaddr; long offset; pgd_t *pgd_dir; + p4d_t *p4d_dir; + pud_t *pud_dir; pmd_t *pmd_dir; pte_t *pte_dir; @@ -196,17 +198,21 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr); #endif pgd_dir = pgd_offset_k(virtaddr); - pmd_dir = pmd_alloc(&init_mm, pgd_dir, virtaddr); + p4d_dir = p4d_offset(pgd_dir, virtaddr); + pud_dir = pud_offset(p4d_dir, virtaddr); + pmd_dir = pmd_alloc(&init_mm, pud_dir, virtaddr); if (!pmd_dir) { printk("ioremap: no mem for pmd_dir\n"); return NULL; } if (CPU_IS_020_OR_030) { +#if CONFIG_PGTABLE_LEVELS == 3 pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr; physaddr += PTRTREESIZE; virtaddr += PTRTREESIZE; size -= PTRTREESIZE; +#endif } else { pte_dir = pte_alloc_kernel(pmd_dir, virtaddr); if (!pte_dir) { @@ -258,19 +264,24 @@ void __iounmap(void *addr, unsigned long size) { unsigned long virtaddr = (unsigned long)addr; pgd_t *pgd_dir; + p4d_t *p4d_dir; + pud_t *pud_dir; pmd_t *pmd_dir; pte_t *pte_dir; while ((long)size > 0) { pgd_dir = pgd_offset_k(virtaddr); - if (pgd_bad(*pgd_dir)) { - printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir)); - pgd_clear(pgd_dir); + p4d_dir = p4d_offset(pgd_dir, virtaddr); + pud_dir = pud_offset(p4d_dir, virtaddr); + if (pud_bad(*pud_dir)) { + printk("iounmap: bad pgd(%08lx)\n", pud_val(*pud_dir)); + pud_clear(pud_dir); return; } - pmd_dir = pmd_offset(pgd_dir, virtaddr); + pmd_dir = pmd_offset(pud_dir, virtaddr); if (CPU_IS_020_OR_030) { +#if CONFIG_PGTABLE_LEVELS == 3 int pmd_off = (virtaddr/PTRTREESIZE) & 15; int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK; @@ -281,6 +292,7 @@ void __iounmap(void *addr, unsigned long size) continue; } else if (pmd_type == 0) continue; +#endif } if (pmd_bad(*pmd_dir)) { @@ -307,6 +319,8 @@ void kernel_set_cachemode(void *addr, unsigned long size, int cmode) { unsigned long virtaddr = (unsigned long)addr; pgd_t *pgd_dir; + p4d_t *p4d_dir; + pud_t *pud_dir; pmd_t *pmd_dir; pte_t *pte_dir; @@ -341,14 +355,17 @@ void kernel_set_cachemode(void *addr, unsigned long size, int cmode) while ((long)size > 0) { pgd_dir = pgd_offset_k(virtaddr); - if (pgd_bad(*pgd_dir)) { - printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir)); - pgd_clear(pgd_dir); + p4d_dir = p4d_offset(pgd_dir, virtaddr); + pud_dir = pud_offset(p4d_dir, virtaddr); + if (pud_bad(*pud_dir)) { + printk("iocachemode: bad pud(%08lx)\n", pud_val(*pud_dir)); + pud_clear(pud_dir); return; } - pmd_dir = pmd_offset(pgd_dir, virtaddr); + pmd_dir = pmd_offset(pud_dir, virtaddr); if (CPU_IS_020_OR_030) { +#if CONFIG_PGTABLE_LEVELS == 3 int pmd_off = (virtaddr/PTRTREESIZE) & 15; if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) { @@ -358,6 +375,7 @@ void kernel_set_cachemode(void *addr, unsigned long size, int cmode) size -= PTRTREESIZE; continue; } +#endif } if (pmd_bad(*pmd_dir)) { diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c index 6cb1e41..0ea3756 100644 --- a/arch/m68k/mm/mcfmmu.c +++ b/arch/m68k/mm/mcfmmu.c @@ -92,6 +92,8 @@ int cf_tlb_miss(struct pt_regs *regs, int write, int dtlb, int extension_word) unsigned long flags, mmuar, mmutr; struct mm_struct *mm; pgd_t *pgd; + p4d_t *p4d; + pud_t *pud; pmd_t *pmd; pte_t *pte; int asid; @@ -113,7 +115,19 @@ int cf_tlb_miss(struct pt_regs *regs, int write, int dtlb, int extension_word) return -1; } - pmd = pmd_offset(pgd, mmuar); + p4d = p4d_offset(pgd, mmuar); + if (p4d_none(*p4d)) { + local_irq_restore(flags); + return -1; + } + + pud = pud_offset(p4d, mmuar); + if (pud_none(*pud)) { + local_irq_restore(flags); + return -1; + } + + pmd = pmd_offset(pud, mmuar); if (pmd_none(*pmd)) { local_irq_restore(flags); return -1; diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c index 356601b..4857985 100644 --- a/arch/m68k/mm/motorola.c +++ b/arch/m68k/mm/motorola.c @@ -82,9 +82,11 @@ static pmd_t * __init kernel_ptr_table(void) */ last = (unsigned long)kernel_pg_dir; for (i = 0; i < PTRS_PER_PGD; i++) { - if (!pgd_present(kernel_pg_dir[i])) + pud_t *pud = (pud_t *)(&kernel_pg_dir[i]); + + if (!pud_present(*pud)) continue; - pmd = __pgd_page(kernel_pg_dir[i]); + pmd = pgd_page_vaddr(kernel_pg_dir[i]); if (pmd > last) last = pmd; } @@ -118,6 +120,8 @@ static void __init map_node(int node) #define ROOTTREESIZE (32*1024*1024) unsigned long physaddr, virtaddr, size; pgd_t *pgd_dir; + p4d_t *p4d_dir; + pud_t *pud_dir; pmd_t *pmd_dir; pte_t *pte_dir; @@ -149,14 +153,16 @@ static void __init map_node(int node) continue; } } - if (!pgd_present(*pgd_dir)) { + p4d_dir = p4d_offset(pgd_dir, virtaddr); + pud_dir = pud_offset(p4d_dir, virtaddr); + if (!pud_present(*pud_dir)) { pmd_dir = kernel_ptr_table(); #ifdef DEBUG printk ("[new pointer %p]", pmd_dir); #endif - pgd_set(pgd_dir, pmd_dir); + pud_set(pud_dir, pmd_dir); } else - pmd_dir = pmd_offset(pgd_dir, virtaddr); + pmd_dir = pmd_offset(pud_dir, virtaddr); if (CPU_IS_020_OR_030) { if (virtaddr) { @@ -304,4 +310,3 @@ void __init paging_init(void) node_set_state(i, N_NORMAL_MEMORY); } } -