From: Catalin Marinas <catalin.marinas@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-arch@vger.kernel.org,
Richard Earnshaw <Richard.Earnshaw@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
Szabolcs Nagy <szabolcs.nagy@arm.com>,
Marc Zyngier <maz@kernel.org>,
Kevin Brodsky <kevin.brodsky@arm.com>,
linux-mm@kvack.org, Andrey Konovalov <andreyknvl@google.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Will Deacon <will@kernel.org>, Dave Martin <Dave.Martin@arm.com>
Subject: [PATCH 01/22] mm: Reserve asm-generic prot flags 0x10 and 0x20 for arch use
Date: Wed, 11 Dec 2019 18:40:06 +0000 [thread overview]
Message-ID: <20191211184027.20130-2-catalin.marinas@arm.com> (raw)
In-Reply-To: <20191211184027.20130-1-catalin.marinas@arm.com>
From: Dave Martin <Dave.Martin@arm.com>
The asm-generic/mman.h definitions are used by a few architectures that
also define arch-specific PROT flags with value 0x10 and 0x20. This
currently applies to sparc and powerpc for 0x10, while arm64 will soon
join with 0x10 and 0x20.
To help future maintainers, document the use of this flag in the
asm-generic header too.
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
[catalin.marinas@arm.com: reserve 0x20 as well]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
include/uapi/asm-generic/mman-common.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h
index c160a5354eb6..f94f65d429be 100644
--- a/include/uapi/asm-generic/mman-common.h
+++ b/include/uapi/asm-generic/mman-common.h
@@ -11,6 +11,8 @@
#define PROT_WRITE 0x2 /* page can be written */
#define PROT_EXEC 0x4 /* page can be executed */
#define PROT_SEM 0x8 /* page may be used for atomic ops */
+/* 0x10 reserved for arch-specific use */
+/* 0x20 reserved for arch-specific use */
#define PROT_NONE 0x0 /* page can not be accessed */
#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 */
WARNING: multiple messages have this Message-ID (diff)
From: Catalin Marinas <catalin.marinas@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Szabolcs Nagy <szabolcs.nagy@arm.com>,
Richard Earnshaw <Richard.Earnshaw@arm.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
Andrey Konovalov <andreyknvl@google.com>,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
Dave Martin <Dave.Martin@arm.com>, Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH 01/22] mm: Reserve asm-generic prot flags 0x10 and 0x20 for arch use
Date: Wed, 11 Dec 2019 18:40:06 +0000 [thread overview]
Message-ID: <20191211184027.20130-2-catalin.marinas@arm.com> (raw)
Message-ID: <20191211184006.M2MJyBTPCozZ_POEwgsBzbbNqddi77X0CrTwQZa3dJA@z> (raw)
In-Reply-To: <20191211184027.20130-1-catalin.marinas@arm.com>
From: Dave Martin <Dave.Martin@arm.com>
The asm-generic/mman.h definitions are used by a few architectures that
also define arch-specific PROT flags with value 0x10 and 0x20. This
currently applies to sparc and powerpc for 0x10, while arm64 will soon
join with 0x10 and 0x20.
To help future maintainers, document the use of this flag in the
asm-generic header too.
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
[catalin.marinas@arm.com: reserve 0x20 as well]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
include/uapi/asm-generic/mman-common.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h
index c160a5354eb6..f94f65d429be 100644
--- a/include/uapi/asm-generic/mman-common.h
+++ b/include/uapi/asm-generic/mman-common.h
@@ -11,6 +11,8 @@
#define PROT_WRITE 0x2 /* page can be written */
#define PROT_EXEC 0x4 /* page can be executed */
#define PROT_SEM 0x8 /* page may be used for atomic ops */
+/* 0x10 reserved for arch-specific use */
+/* 0x20 reserved for arch-specific use */
#define PROT_NONE 0x0 /* page can not be accessed */
#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 */
next prev parent reply other threads:[~2019-12-11 18:40 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-11 18:40 [PATCH 00/22] arm64: Memory Tagging Extension user-space support Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas [this message]
2019-12-11 18:40 ` [PATCH 01/22] mm: Reserve asm-generic prot flags 0x10 and 0x20 for arch use Catalin Marinas
2019-12-11 19:26 ` Arnd Bergmann
2019-12-11 19:26 ` Arnd Bergmann
2019-12-11 18:40 ` [PATCH 02/22] kbuild: Add support for 'as-instr' to be used in Kconfig files Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-12 5:03 ` Masahiro Yamada
2019-12-12 5:03 ` Masahiro Yamada
2019-12-11 18:40 ` [PATCH 03/22] arm64: alternative: Allow alternative_insn to always issue the first instruction Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 04/22] arm64: Use macros instead of hard-coded constants for MAIR_EL1 Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 05/22] arm64: mte: system register definitions Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 06/22] arm64: mte: CPU feature detection and initial sysreg configuration Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 07/22] arm64: mte: Use Normal Tagged attributes for the linear map Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 08/22] arm64: mte: Assembler macros and default architecture for .S files Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 09/22] arm64: mte: Tags-aware clear_page() implementation Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 10/22] arm64: mte: Tags-aware copy_page() implementation Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 11/22] arm64: Tags-aware memcmp_pages() implementation Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 12/22] arm64: mte: Add specific SIGSEGV codes Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 19:31 ` Arnd Bergmann
2019-12-11 19:31 ` Arnd Bergmann
2019-12-12 9:34 ` Catalin Marinas
2019-12-12 9:34 ` Catalin Marinas
2019-12-12 18:26 ` Eric W. Biederman
2019-12-12 18:26 ` Eric W. Biederman
2019-12-17 17:48 ` Catalin Marinas
2019-12-17 17:48 ` Catalin Marinas
2019-12-17 20:06 ` Eric W. Biederman
2019-12-17 20:06 ` Eric W. Biederman
2019-12-11 18:40 ` [PATCH 13/22] arm64: mte: Handle synchronous and asynchronous tag check faults Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-14 1:43 ` Peter Collingbourne
2019-12-14 1:43 ` Peter Collingbourne
2019-12-17 18:01 ` Catalin Marinas
2019-12-17 18:01 ` Catalin Marinas
2019-12-20 1:36 ` [PATCH] arm64: mte: Do not service syscalls after async tag fault Peter Collingbourne
2019-12-20 1:36 ` Peter Collingbourne
2020-02-12 11:09 ` Catalin Marinas
2020-02-18 21:59 ` Peter Collingbourne
2020-02-19 16:16 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 14/22] mm: Introduce arch_calc_vm_flag_bits() Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 15/22] arm64: mte: Add PROT_MTE support to mmap() and mprotect() Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2020-01-21 22:06 ` Peter Collingbourne
2019-12-11 18:40 ` [PATCH 16/22] mm: Introduce arch_validate_flags() Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 17/22] arm64: mte: Validate the PROT_MTE request via arch_validate_flags() Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 18/22] mm: Allow arm64 mmap(PROT_MTE) on RAM-based files Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 19/22] arm64: mte: Allow user control of the tag check mode via prctl() Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-19 20:32 ` Peter Collingbourne
2019-12-19 20:32 ` Peter Collingbourne
2019-12-20 1:48 ` [PATCH] arm64: mte: Clear SCTLR_EL1.TCF0 on exec Peter Collingbourne
2019-12-20 1:48 ` Peter Collingbourne
2020-02-12 17:03 ` Catalin Marinas
2019-12-27 14:34 ` [PATCH 19/22] arm64: mte: Allow user control of the tag check mode via prctl() Kevin Brodsky
2019-12-27 14:34 ` Kevin Brodsky
2020-02-12 11:45 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 20/22] arm64: mte: Allow user control of the excluded tags " Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-16 14:20 ` Kevin Brodsky
2019-12-16 14:20 ` Kevin Brodsky
2019-12-16 17:30 ` Peter Collingbourne
2019-12-16 17:30 ` Peter Collingbourne
2019-12-17 17:56 ` Catalin Marinas
2019-12-17 17:56 ` Catalin Marinas
2020-06-22 17:17 ` Catalin Marinas
2020-06-22 19:00 ` Peter Collingbourne
2020-06-23 16:42 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 21/22] arm64: mte: Kconfig entry Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 22/22] arm64: mte: Add Memory Tagging Extension documentation Catalin Marinas
2019-12-11 18:40 ` Catalin Marinas
2019-12-24 15:03 ` Kevin Brodsky
2019-12-24 15:03 ` Kevin Brodsky
2019-12-13 18:05 ` [PATCH 00/22] arm64: Memory Tagging Extension user-space support Peter Collingbourne
2019-12-13 18:05 ` Peter Collingbourne
2020-02-13 11:23 ` Catalin Marinas
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