From: Marc Zyngier <marc.zyngier@arm.com>
To: Pavel Machek <pavel@ucw.cz>,
Kristina Martsenko <kristina.martsenko@arm.com>
Cc: linux-arm-kernel@lists.infradead.org,
Adam Wallis <awallis@codeaurora.org>,
Amit Kachhap <amit.kachhap@arm.com>,
Andrew Jones <drjones@redhat.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Christoffer Dall <christoffer.dall@arm.com>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Dave P Martin <dave.martin@arm.com>,
Jacob Bramley <jacob.bramley@arm.com>,
Kees Cook <keescook@chromium.org>,
Mark Rutland <mark.rutland@arm.com>,
Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>,
Richard Henderson <richard.henderson@linaro.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Will Deacon <will.deacon@arm.com>,
kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 07/13] arm64: add basic pointer authentication support
Date: Fri, 4 Jan 2019 09:21:30 +0000 [thread overview]
Message-ID: <681a2835-1a70-f3c3-3534-7b4cf6139cac@arm.com> (raw)
In-Reply-To: <20190103202901.GA21564@amd>
On 03/01/2019 20:29, Pavel Machek wrote:
> On Fri 2018-12-07 18:39:25, Kristina Martsenko wrote:
>> From: Mark Rutland <mark.rutland@arm.com>
>>
>> This patch adds basic support for pointer authentication,
>> allowing userspace to make use of APIAKey, APIBKey, APDAKey,
>> APDBKey, and APGAKey. The kernel maintains key values for each
>> process (shared by all threads within), which are initialised to
>> random values at exec()
> time.
>
> ...
>
>> +/* + * We give each process its own keys, which are shared by
>> all threads. The keys + * are inherited upon fork(), and
>> reinitialised upon exec*(). + */ +struct ptrauth_keys { + struct
>> ptrauth_key apia; + struct ptrauth_key apib; + struct ptrauth_key
>> apda; + struct ptrauth_key apdb; + struct ptrauth_key apga; +};
>
> intstruction_a, data_a, generic_a? Should be easier to understand
> than "apdb" ...
... until you realize that these names do match the documentation,
which makes it even easier to understand how the code uses the
architecture.
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2019-01-04 9:21 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-07 18:39 [PATCH v6 00/13] ARMv8.3 pointer authentication userspace support Kristina Martsenko
2018-12-07 18:39 ` [PATCH v6 01/13] arm64: add comments about EC exception levels Kristina Martsenko
2018-12-09 14:34 ` Richard Henderson
2018-12-07 18:39 ` [PATCH v6 02/13] arm64: add pointer authentication register bits Kristina Martsenko
2018-12-09 14:24 ` Richard Henderson
2018-12-10 19:54 ` Kristina Martsenko
2018-12-11 20:08 ` Will Deacon
2018-12-07 18:39 ` [PATCH v6 03/13] arm64/kvm: consistently handle host HCR_EL2 flags Kristina Martsenko
2018-12-08 10:31 ` Marc Zyngier
2018-12-09 14:35 ` Richard Henderson
2018-12-07 18:39 ` [PATCH v6 04/13] arm64/kvm: hide ptrauth from guests Kristina Martsenko
2018-12-08 10:32 ` Marc Zyngier
2018-12-09 14:53 ` Richard Henderson
2018-12-10 20:12 ` Kristina Martsenko
2018-12-10 20:22 ` Richard Henderson
2018-12-10 20:30 ` Kristina Martsenko
2018-12-19 15:21 ` Peter Maydell
2018-12-07 18:39 ` [PATCH v6 05/13] arm64: Don't trap host pointer auth use to EL2 Kristina Martsenko
2018-12-09 14:54 ` Richard Henderson
2018-12-07 18:39 ` [PATCH v6 06/13] arm64/cpufeature: detect pointer authentication Kristina Martsenko
2018-12-09 14:58 ` Richard Henderson
2018-12-07 18:39 ` [PATCH v6 07/13] arm64: add basic pointer authentication support Kristina Martsenko
2018-12-09 14:59 ` Richard Henderson
2019-01-03 20:29 ` Pavel Machek
2019-01-04 9:21 ` Marc Zyngier [this message]
2019-01-04 9:33 ` Pavel Machek
2019-01-04 18:02 ` Mark Rutland
2018-12-07 18:39 ` [PATCH v6 08/13] arm64: expose user PAC bit positions via ptrace Kristina Martsenko
2018-12-09 15:03 ` Richard Henderson
2018-12-09 15:41 ` Richard Henderson
2018-12-10 12:03 ` Catalin Marinas
2018-12-10 14:22 ` Richard Henderson
2018-12-10 14:29 ` Will Deacon
2018-12-10 16:09 ` Catalin Marinas
2018-12-07 18:39 ` [PATCH v6 09/13] arm64: perf: strip PAC when unwinding userspace Kristina Martsenko
2018-12-07 18:39 ` [PATCH v6 10/13] arm64: add prctl control for resetting ptrauth keys Kristina Martsenko
2018-12-12 15:22 ` Dave Martin
2018-12-07 18:39 ` [PATCH v6 11/13] arm64: add ptrace regsets for ptrauth key management Kristina Martsenko
2018-12-12 15:23 ` Dave Martin
2018-12-07 18:39 ` [PATCH v6 12/13] arm64: enable pointer authentication Kristina Martsenko
2018-12-07 18:39 ` [PATCH v6 13/13] arm64: docs: document " Kristina Martsenko
2018-12-12 19:35 ` [PATCH v6 00/13] ARMv8.3 pointer authentication userspace support Will Deacon
2018-12-13 18:01 ` Will Deacon
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