From: Guo Ren <guoren@kernel.org>
To: Mike Rapoport <rppt@kernel.org>
Cc: Rich Felker <dalias@libc.org>,
linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org,
x86@kernel.org, linux-mips@vger.kernel.org,
Max Filippov <jcmvbkbc@gmail.com>,
sparclinux@vger.kernel.org, linux-hexagon@vger.kernel.org,
WANG Xuerui <kernel@xen0n.name>,
Greg Ungerer <gerg@linux-m68k.org>,
linux-arch@vger.kernel.org,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Michael Ellerman <mpe@ellerman.id.au>,
Helge Deller <deller@gmx.de>, Huacai Chen <chenhuacai@kernel.org>,
linux-riscv@lists.infradead.org, Vineet Gupta <vgupta@kernel.org>,
Matt Turner <mattst88@gmail.com>,
linux-snps-arc@lists.infradead.org, linux--csky@vger.kernel.org,
Arnd Bergmann <arnd@arndb.de>,
linux-xtensa@linux-xtensa.org, linux-um@lists.infradead.org,
Richard Weinberger <richard@nod.at>,
linux-m68k@lists.linux-m68k.org, openrisc@lists.librecores.org,
loongarch@lists.linux.dev, Stafford Horne <shorne@gmail.com>,
Brian Cain <bcain@quicinc.com>, Michal Simek <monstr@monstr.eu>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
linux-parisc@vger.kernel.org, linux-kernel@vger.kernel.org,
Dinh Nguyen <dinguyen@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
linux-alpha@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
linuxppc-dev@lists.ozlabs.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH 3/3] mm, arch: add generic implementation of pfn_valid() for FLATMEM
Date: Fri, 27 Jan 2023 09:58:15 +0800 [thread overview]
Message-ID: <CAJF2gTQw7vaj8uu2CYuKHwKQM4=v7dxmtNaMMoFXjwhtvog7nw@mail.gmail.com> (raw)
In-Reply-To: <20230125190757.22555-4-rppt@kernel.org>
On Thu, Jan 26, 2023 at 3:08 AM Mike Rapoport <rppt@kernel.org> wrote:
>
> From: "Mike Rapoport (IBM)" <rppt@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@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@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
next prev parent reply other threads:[~2023-01-28 18:57 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-25 19:07 [PATCH 0/3] mm, arch: add generic implementation of pfn_valid() for FLATMEM Mike Rapoport
2023-01-25 19:07 ` [PATCH 1/3] m68k: use asm-generic/memory_model.h for both MMU and !MMU Mike Rapoport
2023-01-26 8:20 ` Geert Uytterhoeven
2023-01-25 19:07 ` [PATCH 2/3] mips: drop definition of pfn_valid() for DISCONTIGMEM Mike Rapoport
2023-01-25 19:07 ` [PATCH 3/3] mm, arch: add generic implementation of pfn_valid() for FLATMEM Mike Rapoport
2023-01-26 1:45 ` Andrew Morton
2023-01-27 1:58 ` Guo Ren [this message]
2023-01-28 5:07 ` Huacai Chen
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