linux-kernel - Re: [PATCH v6 00/13] ARMv8.3 pointer authentication userspace support

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Date:   Wed, 12 Dec 2018 19:35:44 +0000
From:   Will Deacon <will.deacon@....com>
To:     Kristina Martsenko <kristina.martsenko@....com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Adam Wallis <awallis@...eaurora.org>,
        Amit Kachhap <amit.kachhap@....com>,
        Andrew Jones <drjones@...hat.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Christoffer Dall <christoffer.dall@....com>,
        Cyrill Gorcunov <gorcunov@...il.com>,
        Dave P Martin <dave.martin@....com>,
        Jacob Bramley <jacob.bramley@....com>,
        Kees Cook <keescook@...omium.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Mark Rutland <mark.rutland@....com>,
        Ramana Radhakrishnan <ramana.radhakrishnan@....com>,
        Richard Henderson <richard.henderson@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        kvmarm@...ts.cs.columbia.edu, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 00/13] ARMv8.3 pointer authentication userspace support

Hi Kristina,

On Fri, Dec 07, 2018 at 06:39:18PM +0000, Kristina Martsenko wrote:
> This series adds support for the ARMv8.3 pointer authentication extension,
> enabling userspace return address protection with GCC 7 and above.

I've pushed this out to for-next/ptr-auth with the following changes:

  * Rebased onto for-next/core
  * Dropped the GET/SET ptrace requests for now, due to fragile regset usage
  * Moved the user key state from thread_info to thread_struct
  * Removed use of VA_BITS for the PAC mask (doesn't work with 52-bit user VAs)
  * Added a patch to use _BITUL for the bit definitions in sysreg.h
  * Tidied up the HWCAP generation [need to run this past Suzuki]
  * Reduced the number of CPU caps from 6 to 4 [also need to run past Suzuki]
  * Added Reviewed-by tags

I've not merged it into for-next/core yet, because it could use some testing
and review first.

Cheers,

Will