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>, 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> Subject: [PATCH 18/22] mm: Allow arm64 mmap(PROT_MTE) on RAM-based files Date: Wed, 11 Dec 2019 18:40:23 +0000 [thread overview] Message-ID: <20191211184027.20130-19-catalin.marinas@arm.com> (raw) In-Reply-To: <20191211184027.20130-1-catalin.marinas@arm.com> Since arm64 memory (allocation) tags can only be stored in RAM, mapping files with PROT_MTE is not allowed by default. RAM-based files like those in a tmpfs mount or memfd_create() can support memory tagging, so update the vm_flags accordingly in shmem_mmap(). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> --- mm/shmem.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/shmem.c b/mm/shmem.c index 165fa6332993..1b1753f90e2d 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2225,6 +2225,9 @@ static int shmem_mmap(struct file *file, struct vm_area_struct *vma) vma->vm_flags &= ~(VM_MAYWRITE); } + /* arm64 - allow memory tagging on RAM-based files */ + vma->vm_flags |= VM_MTE_ALLOWED; + file_accessed(file); vma->vm_ops = &shmem_vm_ops; if (IS_ENABLED(CONFIG_TRANSPARENT_HUGE_PAGECACHE) &&
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 Subject: [PATCH 18/22] mm: Allow arm64 mmap(PROT_MTE) on RAM-based files Date: Wed, 11 Dec 2019 18:40:23 +0000 [thread overview] Message-ID: <20191211184027.20130-19-catalin.marinas@arm.com> (raw) Message-ID: <20191211184023.GEMlgHtf4u63S1RdyQP2tbv6veRQDMmJIhDhCIB6T7I@z> (raw) In-Reply-To: <20191211184027.20130-1-catalin.marinas@arm.com> Since arm64 memory (allocation) tags can only be stored in RAM, mapping files with PROT_MTE is not allowed by default. RAM-based files like those in a tmpfs mount or memfd_create() can support memory tagging, so update the vm_flags accordingly in shmem_mmap(). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> --- mm/shmem.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/shmem.c b/mm/shmem.c index 165fa6332993..1b1753f90e2d 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2225,6 +2225,9 @@ static int shmem_mmap(struct file *file, struct vm_area_struct *vma) vma->vm_flags &= ~(VM_MAYWRITE); } + /* arm64 - allow memory tagging on RAM-based files */ + vma->vm_flags |= VM_MTE_ALLOWED; + file_accessed(file); vma->vm_ops = &shmem_vm_ops; if (IS_ENABLED(CONFIG_TRANSPARENT_HUGE_PAGECACHE) &&
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 ` [PATCH 01/22] mm: Reserve asm-generic prot flags 0x10 and 0x20 for arch use Catalin Marinas 2019-12-11 18:40 ` 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 ` Catalin Marinas [this message] 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 ` [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
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20191211184027.20130-19-catalin.marinas@arm.com \ --to=catalin.marinas@arm.com \ --cc=Richard.Earnshaw@arm.com \ --cc=andreyknvl@google.com \ --cc=kevin.brodsky@arm.com \ --cc=linux-arch@vger.kernel.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-mm@kvack.org \ --cc=maz@kernel.org \ --cc=szabolcs.nagy@arm.com \ --cc=vincenzo.frascino@arm.com \ --cc=will@kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).