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Message-Id: <20240925210615.2572360-3-arnd@kernel.org> Date: Wed, 25 Sep 2024 21:06:12 +0000 From: Arnd Bergmann <arnd@...nel.org> To: linux-mm@...ck.org Cc: Arnd Bergmann <arnd@...db.de>, "Jason A. Donenfeld" <Jason@...c4.com>, Alexander Viro <viro@...iv.linux.org.uk>, Alexandre Torgue <alexandre.torgue@...s.st.com>, Andreas Larsson <andreas@...sler.com>, Andrew Morton <akpm@...ux-foundation.org>, Ard Biesheuvel <ardb@...nel.org>, Christian Brauner <brauner@...nel.org>, Christoph Hellwig <hch@....de>, Christophe Leroy <christophe.leroy@...roup.eu>, Damien Le Moal <dlemoal@...nel.org>, David Hildenbrand <david@...hat.com>, Greg Ungerer <gerg@...ux-m68k.org>, Helge Deller <deller@....de>, Kees Cook <kees@...nel.org>, "Liam R . Howlett" <Liam.Howlett@...cle.com>, Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, Matt Turner <mattst88@...il.com>, Max Filippov <jcmvbkbc@...il.com>, Michael Ellerman <mpe@...erman.id.au>, Michal Hocko <mhocko@...e.com>, Nicholas Piggin <npiggin@...il.com>, Richard Henderson <richard.henderson@...aro.org>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, Vladimir Murzin <vladimir.murzin@....com>, Vlastimil Babka <vbabka@...e.cz>, linux-stm32@...md-mailman.stormreply.com, linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, linux-arch@...r.kernel.org Subject: [PATCH 2/5] asm-generic: move MAP_* flags from mman-common.h to mman.h From: Arnd Bergmann <arnd@...db.de> powerpc and sparc include asm-generic/mman-common.h to get the MAP_* flags 0x008000 through 0x4000000, but those flags are all different on alpha, mips, parisc and xtensa. Add duplicate definitions for these along with the MAP_* flags for 0x100 through 0x4000 that are already different on powerpc and sparc, as a preparation for actually sharing mman-common.h with all architectures. Signed-off-by: Arnd Bergmann <arnd@...db.de> --- arch/powerpc/include/uapi/asm/mman.h | 16 ++++++++++++++++ arch/sparc/include/uapi/asm/mman.h | 15 +++++++++++++++ include/uapi/asm-generic/mman-common.h | 16 ---------------- include/uapi/asm-generic/mman.h | 21 +++++++++++++++++++++ include/uapi/linux/mman.h | 5 +++++ 5 files changed, 57 insertions(+), 16 deletions(-) diff --git a/arch/powerpc/include/uapi/asm/mman.h b/arch/powerpc/include/uapi/asm/mman.h index c0c737215b00..d57b347c37fe 100644 --- a/arch/powerpc/include/uapi/asm/mman.h +++ b/arch/powerpc/include/uapi/asm/mman.h @@ -13,6 +13,11 @@ #define PROT_SAO 0x10 /* Strong Access Ordering */ +/* 0x01 - 0x03 are defined in linux/mman.h */ +#define MAP_TYPE 0x0f /* Mask for type of mapping */ +#define MAP_FIXED 0x10 /* Interpret addr exactly */ +#define MAP_ANONYMOUS 0x20 /* don't use a file */ + #define MAP_RENAME MAP_ANONYMOUS /* In SunOS terminology */ #define MAP_NORESERVE 0x40 /* don't reserve swap pages */ #define MAP_LOCKED 0x80 @@ -21,6 +26,17 @@ #define MAP_DENYWRITE 0x0800 /* ETXTBSY */ #define MAP_EXECUTABLE 0x1000 /* mark it as an executable */ +#define MAP_POPULATE 0x008000 /* populate (prefault) pagetables */ +#define MAP_NONBLOCK 0x010000 /* do not block on IO */ +#define MAP_STACK 0x020000 /* give out an address that is best suited for process/thread stacks */ +#define MAP_HUGETLB 0x040000 /* create a huge page mapping */ +#define MAP_SYNC 0x080000 /* perform synchronous page faults for the mapping */ +#define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ + +#define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be + * uninitialized */ + + #define MCL_CURRENT 0x2000 /* lock all currently mapped pages */ #define MCL_FUTURE 0x4000 /* lock all additions to address space */ diff --git a/arch/sparc/include/uapi/asm/mman.h b/arch/sparc/include/uapi/asm/mman.h index cec9f4109687..afb86698cdb1 100644 --- a/arch/sparc/include/uapi/asm/mman.h +++ b/arch/sparc/include/uapi/asm/mman.h @@ -8,6 +8,11 @@ #define PROT_ADI 0x10 /* ADI enabled */ +/* 0x01 - 0x03 are defined in linux/mman.h */ +#define MAP_TYPE 0x0f /* Mask for type of mapping */ +#define MAP_FIXED 0x10 /* Interpret addr exactly */ +#define MAP_ANONYMOUS 0x20 /* don't use a file */ + #define MAP_RENAME MAP_ANONYMOUS /* In SunOS terminology */ #define MAP_NORESERVE 0x40 /* don't reserve swap pages */ #define MAP_INHERIT 0x80 /* SunOS doesn't do this, but... */ @@ -18,6 +23,16 @@ #define MAP_DENYWRITE 0x0800 /* ETXTBSY */ #define MAP_EXECUTABLE 0x1000 /* mark it as an executable */ +#define MAP_POPULATE 0x008000 /* populate (prefault) pagetables */ +#define MAP_NONBLOCK 0x010000 /* do not block on IO */ +#define MAP_STACK 0x020000 /* give out an address that is best suited for process/thread stacks */ +#define MAP_HUGETLB 0x040000 /* create a huge page mapping */ +#define MAP_SYNC 0x080000 /* perform synchronous page faults for the mapping */ +#define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ + +#define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be + * uninitialized */ + #define MCL_CURRENT 0x2000 /* lock all currently mapped pages */ #define MCL_FUTURE 0x4000 /* lock all additions to address space */ #define MCL_ONFAULT 0x8000 /* lock all pages that are faulted in */ diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h index 792ad5599d9c..8d66d2dabaa8 100644 --- a/include/uapi/asm-generic/mman-common.h +++ b/include/uapi/asm-generic/mman-common.h @@ -17,22 +17,6 @@ #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ -/* 0x01 - 0x03 are defined in linux/mman.h */ -#define MAP_TYPE 0x0f /* Mask for type of mapping */ -#define MAP_FIXED 0x10 /* Interpret addr exactly */ -#define MAP_ANONYMOUS 0x20 /* don't use a file */ - -/* 0x0100 - 0x4000 flags are defined in asm-generic/mman.h */ -#define MAP_POPULATE 0x008000 /* populate (prefault) pagetables */ -#define MAP_NONBLOCK 0x010000 /* do not block on IO */ -#define MAP_STACK 0x020000 /* give out an address that is best suited for process/thread stacks */ -#define MAP_HUGETLB 0x040000 /* create a huge page mapping */ -#define MAP_SYNC 0x080000 /* perform synchronous page faults for the mapping */ -#define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ - -#define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be - * uninitialized */ - /* * Flags for mlock */ diff --git a/include/uapi/asm-generic/mman.h b/include/uapi/asm-generic/mman.h index 57e8195d0b53..f26f9b4c03e1 100644 --- a/include/uapi/asm-generic/mman.h +++ b/include/uapi/asm-generic/mman.h @@ -4,12 +4,33 @@ #include <asm-generic/mman-common.h> +/* + * 0x01 - 0x03 are defined in linux/mman.h + * 0x04 - 0x200000 are architecture specific + * 0x200000 - 0x2000000 are available for common assignments in linux/mman.h + * 0x4000000 - 0x80000000 are used for hugepage encodings + */ +#define MAP_TYPE 0x0f /* Mask for type of mapping */ +#define MAP_FIXED 0x10 /* Interpret addr exactly */ +#define MAP_ANONYMOUS 0x20 /* don't use a file */ + #define MAP_GROWSDOWN 0x0100 /* stack-like segment */ #define MAP_DENYWRITE 0x0800 /* ETXTBSY */ #define MAP_EXECUTABLE 0x1000 /* mark it as an executable */ #define MAP_LOCKED 0x2000 /* pages are locked */ #define MAP_NORESERVE 0x4000 /* don't check for reservations */ +#define MAP_POPULATE 0x008000 /* populate (prefault) pagetables */ +#define MAP_NONBLOCK 0x010000 /* do not block on IO */ +#define MAP_STACK 0x020000 /* give out an address that is best suited for process/thread stacks */ +#define MAP_HUGETLB 0x040000 /* create a huge page mapping */ +#define MAP_SYNC 0x080000 /* perform synchronous page faults for the mapping */ +#define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ + +#define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be + * uninitialized */ + + /* * Bits [26:31] are reserved, see asm-generic/hugetlb_encode.h * for MAP_HUGETLB usage diff --git a/include/uapi/linux/mman.h b/include/uapi/linux/mman.h index e89d00528f2f..b70cb06dd7ef 100644 --- a/include/uapi/linux/mman.h +++ b/include/uapi/linux/mman.h @@ -18,6 +18,11 @@ #define MAP_PRIVATE 0x02 /* Changes are private */ #define MAP_SHARED_VALIDATE 0x03 /* share + validate extension flags */ #define MAP_DROPPABLE 0x08 /* Zero memory under memory pressure. */ +/* + * 0x10 through 0x200000 are used for architecture specific definitions + * in asm/mman.h, numbers 0x400000 through 0x2000000 are currently + * available on all architectures. + */ /* * Huge page size encoding when MAP_HUGETLB is specified, and a huge page -- 2.39.2
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