[PATCH 3/3] mm, arch: add generic implementation of pfn_valid() for FLATMEM
Huacai Chen
chenhuacai at kernel.org
Fri Jan 27 21:07:04 PST 2023
For LoongArch part:
Acked-by: Huacai Chen <chenhuacai at loongson.cn>
On Fri, Jan 27, 2023 at 9:58 AM Guo Ren <guoren at kernel.org> wrote:
>
> On Thu, Jan 26, 2023 at 3:08 AM Mike Rapoport <rppt at kernel.org> wrote:
> >
> > From: "Mike Rapoport (IBM)" <rppt at kernel.org>
> >
> > Every architecture that supports FLATMEM memory model defines its own
> > version of pfn_valid() that essentially compares a pfn to max_mapnr.
> >
> > Use mips/powerpc version implemented as static inline as a generic
> > implementation of pfn_valid() and drop its per-architecture definitions
> >
> > Signed-off-by: Mike Rapoport (IBM) <rppt at kernel.org>
> > ---
> > arch/alpha/include/asm/page.h | 4 ----
> > arch/arc/include/asm/page.h | 1 -
> > arch/csky/include/asm/page.h | 1 -
> > arch/hexagon/include/asm/page.h | 1 -
> > arch/ia64/include/asm/page.h | 4 ----
> > arch/loongarch/include/asm/page.h | 13 -------------
> > arch/m68k/include/asm/page_no.h | 2 --
> > arch/microblaze/include/asm/page.h | 1 -
> > arch/mips/include/asm/page.h | 13 -------------
> > arch/nios2/include/asm/page.h | 9 ---------
> > arch/openrisc/include/asm/page.h | 2 --
> > arch/parisc/include/asm/page.h | 4 ----
> > arch/powerpc/include/asm/page.h | 9 ---------
> > arch/riscv/include/asm/page.h | 5 -----
> > arch/sh/include/asm/page.h | 3 ---
> > arch/sparc/include/asm/page_32.h | 1 -
> > arch/um/include/asm/page.h | 1 -
> > arch/x86/include/asm/page_32.h | 4 ----
> > arch/x86/include/asm/page_64.h | 4 ----
> > arch/xtensa/include/asm/page.h | 2 --
> > include/asm-generic/memory_model.h | 12 ++++++++++++
> > include/asm-generic/page.h | 2 --
> > 22 files changed, 12 insertions(+), 86 deletions(-)
> >
> > diff --git a/arch/alpha/include/asm/page.h b/arch/alpha/include/asm/page.h
> > index 8f3f5eecba28..227d32b6b75f 100644
> > --- a/arch/alpha/include/asm/page.h
> > +++ b/arch/alpha/include/asm/page.h
> > @@ -87,10 +87,6 @@ typedef struct page *pgtable_t;
> > #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
> > #define virt_addr_valid(kaddr) pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
> >
> > -#ifdef CONFIG_FLATMEM
> > -#define pfn_valid(pfn) ((pfn) < max_mapnr)
> > -#endif /* CONFIG_FLATMEM */
> > -
> > #include <asm-generic/memory_model.h>
> > #include <asm-generic/getorder.h>
> >
> > diff --git a/arch/arc/include/asm/page.h b/arch/arc/include/asm/page.h
> > index 9a62e1d87967..e43fe27ec54d 100644
> > --- a/arch/arc/include/asm/page.h
> > +++ b/arch/arc/include/asm/page.h
> > @@ -109,7 +109,6 @@ extern int pfn_valid(unsigned long pfn);
> > #else /* CONFIG_HIGHMEM */
> >
> > #define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_RAM_BASE)
> > -#define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
> >
> > #endif /* CONFIG_HIGHMEM */
> >
> > diff --git a/arch/csky/include/asm/page.h b/arch/csky/include/asm/page.h
> > index ed7451478b1b..b23e3006a9e0 100644
> > --- a/arch/csky/include/asm/page.h
> > +++ b/arch/csky/include/asm/page.h
> > @@ -39,7 +39,6 @@
> >
> > #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && \
> > (void *)(kaddr) < high_memory)
> > -#define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
> For csky part:
> Acked-by: Guo Ren <guoren at kernel.org>
>
> >
> > extern void *memset(void *dest, int c, size_t l);
> > extern void *memcpy(void *to, const void *from, size_t l);
> > diff --git a/arch/hexagon/include/asm/page.h b/arch/hexagon/include/asm/page.h
> > index d7d4f9fca327..9c03b9965f07 100644
> > --- a/arch/hexagon/include/asm/page.h
> > +++ b/arch/hexagon/include/asm/page.h
> > @@ -95,7 +95,6 @@ struct page;
> > /* Default vm area behavior is non-executable. */
> > #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
> >
> > -#define pfn_valid(pfn) ((pfn) < max_mapnr)
> > #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
> >
> > /* Need to not use a define for linesize; may move this to another file. */
> > diff --git a/arch/ia64/include/asm/page.h b/arch/ia64/include/asm/page.h
> > index 1b990466d540..783eceab5df3 100644
> > --- a/arch/ia64/include/asm/page.h
> > +++ b/arch/ia64/include/asm/page.h
> > @@ -97,10 +97,6 @@ do { \
> >
> > #include <asm-generic/memory_model.h>
> >
> > -#ifdef CONFIG_FLATMEM
> > -# define pfn_valid(pfn) ((pfn) < max_mapnr)
> > -#endif
> > -
> > #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
> > #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
> > #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
> > diff --git a/arch/loongarch/include/asm/page.h b/arch/loongarch/include/asm/page.h
> > index 53f284a96182..fb5338b352e6 100644
> > --- a/arch/loongarch/include/asm/page.h
> > +++ b/arch/loongarch/include/asm/page.h
> > @@ -82,19 +82,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
> >
> > #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
> >
> > -#ifdef CONFIG_FLATMEM
> > -
> > -static inline int pfn_valid(unsigned long pfn)
> > -{
> > - /* avoid <linux/mm.h> include hell */
> > - extern unsigned long max_mapnr;
> > - unsigned long pfn_offset = ARCH_PFN_OFFSET;
> > -
> > - return pfn >= pfn_offset && pfn < max_mapnr;
> > -}
> > -
> > -#endif
> > -
> > #define virt_to_pfn(kaddr) PFN_DOWN(PHYSADDR(kaddr))
> > #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
> >
> > diff --git a/arch/m68k/include/asm/page_no.h b/arch/m68k/include/asm/page_no.h
> > index 0a8ccef777fd..2555ec57149d 100644
> > --- a/arch/m68k/include/asm/page_no.h
> > +++ b/arch/m68k/include/asm/page_no.h
> > @@ -26,8 +26,6 @@ extern unsigned long memory_end;
> > #define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
> > #define page_to_virt(page) __va(((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET))
> >
> > -#define pfn_valid(pfn) ((pfn) < max_mapnr)
> > -
> > #define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET) && \
> > ((unsigned long)(kaddr) < memory_end))
> >
> > diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h
> > index 4b8b2fa78fc5..7b9861bcd458 100644
> > --- a/arch/microblaze/include/asm/page.h
> > +++ b/arch/microblaze/include/asm/page.h
> > @@ -112,7 +112,6 @@ extern int page_is_ram(unsigned long pfn);
> > # define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
> >
> > # define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT)
> > -# define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && (pfn) < (max_mapnr + ARCH_PFN_OFFSET))
> > # endif /* __ASSEMBLY__ */
> >
> > #define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
> > diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h
> > index 9286f11ff6ad..5978a8dfb917 100644
> > --- a/arch/mips/include/asm/page.h
> > +++ b/arch/mips/include/asm/page.h
> > @@ -224,19 +224,6 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x);
> >
> > #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
> >
> > -#ifdef CONFIG_FLATMEM
> > -
> > -static inline int pfn_valid(unsigned long pfn)
> > -{
> > - /* avoid <linux/mm.h> include hell */
> > - extern unsigned long max_mapnr;
> > - unsigned long pfn_offset = ARCH_PFN_OFFSET;
> > -
> > - return pfn >= pfn_offset && pfn < max_mapnr;
> > -}
> > -
> > -#endif
> > -
> > #define virt_to_pfn(kaddr) PFN_DOWN(virt_to_phys((void *)(kaddr)))
> > #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
> >
> > diff --git a/arch/nios2/include/asm/page.h b/arch/nios2/include/asm/page.h
> > index 6a989819a7c1..0ae7d9ce369b 100644
> > --- a/arch/nios2/include/asm/page.h
> > +++ b/arch/nios2/include/asm/page.h
> > @@ -86,15 +86,6 @@ extern struct page *mem_map;
> >
> > # define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
> >
> > -static inline bool pfn_valid(unsigned long pfn)
> > -{
> > - /* avoid <linux/mm.h> include hell */
> > - extern unsigned long max_mapnr;
> > - unsigned long pfn_offset = ARCH_PFN_OFFSET;
> > -
> > - return pfn >= pfn_offset && pfn < max_mapnr;
> > -}
> > -
> > # define virt_to_page(vaddr) pfn_to_page(PFN_DOWN(virt_to_phys(vaddr)))
> > # define virt_addr_valid(vaddr) pfn_valid(PFN_DOWN(virt_to_phys(vaddr)))
> >
> > diff --git a/arch/openrisc/include/asm/page.h b/arch/openrisc/include/asm/page.h
> > index aab6e64d6db4..52b0d7e76446 100644
> > --- a/arch/openrisc/include/asm/page.h
> > +++ b/arch/openrisc/include/asm/page.h
> > @@ -80,8 +80,6 @@ typedef struct page *pgtable_t;
> >
> > #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
> >
> > -#define pfn_valid(pfn) ((pfn) < max_mapnr)
> > -
> > #define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr)))
> >
> > #endif /* __ASSEMBLY__ */
> > diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h
> > index 6faaaa3ebe9b..667e703c0e8f 100644
> > --- a/arch/parisc/include/asm/page.h
> > +++ b/arch/parisc/include/asm/page.h
> > @@ -155,10 +155,6 @@ extern int npmem_ranges;
> > #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
> > #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
> >
> > -#ifndef CONFIG_SPARSEMEM
> > -#define pfn_valid(pfn) ((pfn) < max_mapnr)
> > -#endif
> > -
> > #ifdef CONFIG_HUGETLB_PAGE
> > #define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */
> > #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
> > diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
> > index edf1dd1b0ca9..f2b6bf5687d0 100644
> > --- a/arch/powerpc/include/asm/page.h
> > +++ b/arch/powerpc/include/asm/page.h
> > @@ -117,15 +117,6 @@ extern long long virt_phys_offset;
> >
> > #ifdef CONFIG_FLATMEM
> > #define ARCH_PFN_OFFSET ((unsigned long)(MEMORY_START >> PAGE_SHIFT))
> > -#ifndef __ASSEMBLY__
> > -extern unsigned long max_mapnr;
> > -static inline bool pfn_valid(unsigned long pfn)
> > -{
> > - unsigned long min_pfn = ARCH_PFN_OFFSET;
> > -
> > - return pfn >= min_pfn && pfn < max_mapnr;
> > -}
> > -#endif
> > #endif
> >
> > #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
> > diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h
> > index 9f432c1b5289..7fed7c431928 100644
> > --- a/arch/riscv/include/asm/page.h
> > +++ b/arch/riscv/include/asm/page.h
> > @@ -171,11 +171,6 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x);
> >
> > #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x))
> >
> > -#ifdef CONFIG_FLATMEM
> > -#define pfn_valid(pfn) \
> > - (((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr))
> > -#endif
> > -
> > #endif /* __ASSEMBLY__ */
> >
> > #define virt_addr_valid(vaddr) ({ \
> > diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
> > index eca5daa43b93..09ac6c7faee0 100644
> > --- a/arch/sh/include/asm/page.h
> > +++ b/arch/sh/include/asm/page.h
> > @@ -169,9 +169,6 @@ typedef struct page *pgtable_t;
> > #define PFN_START (__MEMORY_START >> PAGE_SHIFT)
> > #define ARCH_PFN_OFFSET (PFN_START)
> > #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
> > -#ifdef CONFIG_FLATMEM
> > -#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
> > -#endif
> > #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
> >
> > #include <asm-generic/memory_model.h>
> > diff --git a/arch/sparc/include/asm/page_32.h b/arch/sparc/include/asm/page_32.h
> > index fff8861df107..6be6f683f98f 100644
> > --- a/arch/sparc/include/asm/page_32.h
> > +++ b/arch/sparc/include/asm/page_32.h
> > @@ -130,7 +130,6 @@ extern unsigned long pfn_base;
> > #define ARCH_PFN_OFFSET (pfn_base)
> > #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
> >
> > -#define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
> > #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)
> >
> > #include <asm-generic/memory_model.h>
> > diff --git a/arch/um/include/asm/page.h b/arch/um/include/asm/page.h
> > index cdbd9653aa14..84866127d074 100644
> > --- a/arch/um/include/asm/page.h
> > +++ b/arch/um/include/asm/page.h
> > @@ -108,7 +108,6 @@ extern unsigned long uml_physmem;
> > #define phys_to_pfn(p) ((p) >> PAGE_SHIFT)
> > #define pfn_to_phys(pfn) PFN_PHYS(pfn)
> >
> > -#define pfn_valid(pfn) ((pfn) < max_mapnr)
> > #define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
> >
> > #include <asm-generic/memory_model.h>
> > diff --git a/arch/x86/include/asm/page_32.h b/arch/x86/include/asm/page_32.h
> > index df42f8aa99e4..580d71aca65a 100644
> > --- a/arch/x86/include/asm/page_32.h
> > +++ b/arch/x86/include/asm/page_32.h
> > @@ -15,10 +15,6 @@ extern unsigned long __phys_addr(unsigned long);
> > #define __phys_addr_symbol(x) __phys_addr(x)
> > #define __phys_reloc_hide(x) RELOC_HIDE((x), 0)
> >
> > -#ifdef CONFIG_FLATMEM
> > -#define pfn_valid(pfn) ((pfn) < max_mapnr)
> > -#endif /* CONFIG_FLATMEM */
> > -
> > #include <linux/string.h>
> >
> > static inline void clear_page(void *page)
> > diff --git a/arch/x86/include/asm/page_64.h b/arch/x86/include/asm/page_64.h
> > index 198e03e59ca1..cc6b8e087192 100644
> > --- a/arch/x86/include/asm/page_64.h
> > +++ b/arch/x86/include/asm/page_64.h
> > @@ -39,10 +39,6 @@ extern unsigned long __phys_addr_symbol(unsigned long);
> >
> > #define __phys_reloc_hide(x) (x)
> >
> > -#ifdef CONFIG_FLATMEM
> > -#define pfn_valid(pfn) ((pfn) < max_pfn)
> > -#endif
> > -
> > void clear_page_orig(void *page);
> > void clear_page_rep(void *page);
> > void clear_page_erms(void *page);
> > diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h
> > index 493eb7083b1a..3267c672cd11 100644
> > --- a/arch/xtensa/include/asm/page.h
> > +++ b/arch/xtensa/include/asm/page.h
> > @@ -189,8 +189,6 @@ static inline unsigned long ___pa(unsigned long va)
> > #endif
> > #define __va(x) \
> > ((void *)((unsigned long) (x) - PHYS_OFFSET + PAGE_OFFSET))
> > -#define pfn_valid(pfn) \
> > - ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
> >
> > #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
> > #define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
> > diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h
> > index a2c8ed60233a..13d2a844d928 100644
> > --- a/include/asm-generic/memory_model.h
> > +++ b/include/asm-generic/memory_model.h
> > @@ -19,6 +19,18 @@
> > #define __page_to_pfn(page) ((unsigned long)((page) - mem_map) + \
> > ARCH_PFN_OFFSET)
> >
> > +#ifndef pfn_valid
> > +static inline int pfn_valid(unsigned long pfn)
> > +{
> > + /* avoid <linux/mm.h> include hell */
> > + extern unsigned long max_mapnr;
> > + unsigned long pfn_offset = ARCH_PFN_OFFSET;
> > +
> > + return pfn >= pfn_offset && pfn < max_mapnr;
> > +}
> > +#define pfn_valid pfn_valid
> > +#endif
> > +
> > #elif defined(CONFIG_SPARSEMEM_VMEMMAP)
> >
> > /* memmap is virtually contiguous. */
> > diff --git a/include/asm-generic/page.h b/include/asm-generic/page.h
> > index 6fc47561814c..c0be2edeb484 100644
> > --- a/include/asm-generic/page.h
> > +++ b/include/asm-generic/page.h
> > @@ -84,8 +84,6 @@ extern unsigned long memory_end;
> > #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
> > #endif
> >
> > -#define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
> > -
> > #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
> > ((void *)(kaddr) < (void *)memory_end))
> >
> > --
> > 2.35.1
> >
>
>
> --
> Best Regards
> Guo Ren
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