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Subject: Re: [PATCH v6 04/13] arm64/kvm: hide ptrauth from guests
To:     Richard Henderson <richard.henderson@linaro.org>
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>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org
References: <20181207183931.4285-1-kristina.martsenko@arm.com>
 <20181207183931.4285-5-kristina.martsenko@arm.com>
 <57966497-d21c-5439-e4ba-d75f5552282f@linaro.org>
 <a2eb07e5-6663-aede-fb75-cc91cf3fffa5@arm.com>
 <1f179017-4237-0d36-7adc-0a1470b5fd46@linaro.org>
From:   Kristina Martsenko <kristina.martsenko@arm.com>
Message-ID: <60a6ca4b-cfe9-1ed3-dce6-9f58575240ba@arm.com>
Date:   Mon, 10 Dec 2018 20:30:33 +0000
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On 10/12/2018 20:22, Richard Henderson wrote:
> On 12/10/18 2:12 PM, Kristina Martsenko wrote:
>> The plan was to disable trapping, yes. However, after that thread there
>> was a retrospective change applied to the architecture, such that the
>> XPACLRI (and XPACD/XPACI) instructions are no longer trapped by
>> HCR_EL2.API. (The public documentation on this has not been updated
>> yet.) This means that no HINT-space instructions should trap anymore.
> 
> Ah, thanks for the update.  I'll update my QEMU patch set.
> 
>>> It seems like the header comment here, and
>> Sorry, which header comment?
> 
> Sorry, the patch commit message.

Ah ok. Still seems correct.

Kristina