From: Will Deacon <will@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: linux-arch@vger.kernel.org, Dave Hansen <dave.hansen@intel.com>,
Szabolcs Nagy <szabolcs.nagy@arm.com>,
Andrey Konovalov <andreyknvl@google.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
linux-doc@vger.kernel.org, Will Deacon <will.deacon@arm.com>,
linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Dave P Martin <Dave.Martin@arm.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v9 2/3] arm64: Define Documentation/arm64/tagged-address-abi.rst
Date: Wed, 21 Aug 2019 18:35:01 +0100 [thread overview]
Message-ID: <20190821173501.brvyn5mm5oh6m2s7@willie-the-truck> (raw)
In-Reply-To: <20190821164730.47450-3-catalin.marinas@arm.com>
On Wed, Aug 21, 2019 at 05:47:29PM +0100, Catalin Marinas wrote:
> From: Vincenzo Frascino <vincenzo.frascino@arm.com>
>
> On AArch64 the TCR_EL1.TBI0 bit is set by default, allowing userspace
> (EL0) to perform memory accesses through 64-bit pointers with a non-zero
> top byte. Introduce the document describing the relaxation of the
> syscall ABI that allows userspace to pass certain tagged pointers to
> kernel syscalls.
>
> Cc: Will Deacon <will.deacon@arm.com>
> Cc: Andrey Konovalov <andreyknvl@google.com>
> Cc: Szabolcs Nagy <szabolcs.nagy@arm.com>
> Cc: Kevin Brodsky <kevin.brodsky@arm.com>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> Co-developed-by: Catalin Marinas <catalin.marinas@arm.com>
> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
> ---
> Documentation/arm64/tagged-address-abi.rst | 156 +++++++++++++++++++++
> 1 file changed, 156 insertions(+)
> create mode 100644 Documentation/arm64/tagged-address-abi.rst
Thanks, I'll pick this on up.
Will
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next prev parent reply other threads:[~2019-08-21 17:35 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-21 16:47 [PATCH v9 0/3] arm64 tagged address ABI Catalin Marinas
2019-08-21 16:47 ` [PATCH v9 1/3] mm: untag user pointers in mmap/munmap/mremap/brk Catalin Marinas
2019-08-21 16:47 ` [PATCH v9 2/3] arm64: Define Documentation/arm64/tagged-address-abi.rst Catalin Marinas
2019-08-21 16:57 ` Andrey Konovalov
2019-08-22 9:38 ` Kevin Brodsky
2019-08-21 17:35 ` Will Deacon [this message]
2019-08-22 14:17 ` [PATCH] arm64: Add tagged-address-abi.rst to index.rst Vincenzo Frascino
2019-08-21 16:47 ` [PATCH v9 3/3] arm64: Relax Documentation/arm64/tagged-pointers.rst Catalin Marinas
2019-08-21 17:33 ` Will Deacon
2019-08-21 18:46 ` Dave Martin
2019-08-22 15:55 ` Catalin Marinas
2019-08-22 16:37 ` Dave Martin
2019-08-23 16:19 ` Catalin Marinas
2019-08-23 16:32 ` Dave Martin
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