From: Catalin Marinas <catalin.marinas@arm.com>
To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Will Deacon <will.deacon@arm.com>,
Andrey Konovalov <andreyknvl@google.com>,
Szabolcs Nagy <szabolcs.nagy@arm.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
Dave P Martin <Dave.Martin@arm.com>,
Dave Hansen <dave.hansen@intel.com>,
linux-doc@vger.kernel.org, linux-arch@vger.kernel.org
Subject: [PATCH v8 0/2] arm64 tagged address ABI
Date: Thu, 15 Aug 2019 16:43:58 +0100 [thread overview]
Message-ID: <20190815154403.16473-1-catalin.marinas@arm.com> (raw)
Hi,
This series contains an update to the arm64 tagged address ABI
documentation posted here (v7):
http://lkml.kernel.org/r/20190807155321.9648-1-catalin.marinas@arm.com
together some adjustments to Andrey's patches (already queued through
different trees) following the discussions on the ABI documents:
http://lkml.kernel.org/r/cover.1563904656.git.andreyknvl@google.com
If there are not objections, I propose that that patch 1 (mm: untag user
pointers in mmap...) goes via the mm tree while the other 4 are routed
via the arm64 tree.
Changes in v8:
- removed mmap/munmap/mremap/brk from the list of syscalls not accepting
tagged pointers
- added ioctl() to the list of syscalls not accepting tagged pointers
- added shmat/shmdt to a list of syscalls not accepting tagged pointers
- prctl() now requires all unused arguments to be 0
- note about two-stage ABI relaxation since even without the prctl()
opt-in, the tag is still ignored on a few syscalls (untagged_addr() in
the kernel is unconditional)
- compilable example code together with syscall use
- added a note on tag preservation in the tagged-pointers.rst document
- various rewordings and cleanups
Catalin Marinas (3):
mm: untag user pointers in mmap/munmap/mremap/brk
arm64: Tighten the PR_{SET,GET}_TAGGED_ADDR_CTRL prctl() unused
arguments
arm64: Change the tagged_addr sysctl control semantics to only prevent
the opt-in
Vincenzo Frascino (2):
arm64: Define Documentation/arm64/tagged-address-abi.rst
arm64: Relax Documentation/arm64/tagged-pointers.rst
Documentation/arm64/tagged-address-abi.rst | 155 +++++++++++++++++++++
Documentation/arm64/tagged-pointers.rst | 23 ++-
arch/arm64/kernel/process.c | 17 ++-
kernel/sys.c | 4 +
mm/mmap.c | 5 +
mm/mremap.c | 6 +-
6 files changed, 191 insertions(+), 19 deletions(-)
create mode 100644 Documentation/arm64/tagged-address-abi.rst
next reply other threads:[~2019-08-15 15:44 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-15 15:43 Catalin Marinas [this message]
2019-08-15 15:43 ` [PATCH v8 1/5] mm: untag user pointers in mmap/munmap/mremap/brk Catalin Marinas
2019-08-19 15:45 ` Andrey Konovalov
2019-08-19 16:28 ` Will Deacon
2019-08-22 23:41 ` Andrew Morton
2019-08-23 15:01 ` Will Deacon
2019-08-15 15:44 ` [PATCH v8 2/5] arm64: Tighten the PR_{SET,GET}_TAGGED_ADDR_CTRL prctl() unused arguments Catalin Marinas
2019-08-19 15:46 ` Andrey Konovalov
2019-08-15 15:44 ` [PATCH v8 3/5] arm64: Change the tagged_addr sysctl control semantics to only prevent the opt-in Catalin Marinas
2019-08-19 15:47 ` Andrey Konovalov
2019-08-15 15:44 ` [PATCH v8 4/5] arm64: Define Documentation/arm64/tagged-address-abi.rst Catalin Marinas
2019-08-15 16:54 ` Kevin Brodsky
2019-08-19 15:50 ` Andrey Konovalov
2019-08-19 16:25 ` Will Deacon
2019-08-15 15:44 ` [PATCH v8 5/5] arm64: Relax Documentation/arm64/tagged-pointers.rst Catalin Marinas
2019-08-19 15:48 ` Andrey Konovalov
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