From: Peter Maydell <peter.maydell@linaro.org>
To: Richard Henderson <richard.henderson@linaro.org>
Cc: Kristina Martsenko <kristina.martsenko@arm.com>,
lkml - Kernel Mailing List <linux-kernel@vger.kernel.org>,
Jacob Bramley <jacob.bramley@arm.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Marc Zyngier <marc.zyngier@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
awallis@codeaurora.org, Will Deacon <will.deacon@arm.com>,
kvmarm@lists.cs.columbia.edu,
Cyrill Gorcunov <gorcunov@gmail.com>,
Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>,
amit.kachhap@arm.com, Dave P Martin <dave.martin@arm.com>,
arm-mail-list <linux-arm-kernel@lists.infradead.org>,
keescook@chromium.org
Subject: Re: [PATCH v6 04/13] arm64/kvm: hide ptrauth from guests
Date: Wed, 19 Dec 2018 15:21:49 +0000 [thread overview]
Message-ID: <CAFEAcA99QrjnHRT8_WK1MjUHv_X9yGMmnQAtWL94Y8=FJotikg@mail.gmail.com> (raw)
In-Reply-To: <1f179017-4237-0d36-7adc-0a1470b5fd46@linaro.org>
On Mon, 10 Dec 2018 at 20:22, Richard Henderson
<richard.henderson@linaro.org> 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.
Just to follow up on this loose end, this change to HCR_EL2.API
trap behaviour is documented in the 00bet9 release of the system
register XML which came out today:
https://developer.arm.com/products/architecture/cpu-architecture/a-profile/exploration-tools/system-registers-for-armv8-a
thanks
-- PMM
next prev parent reply other threads:[~2018-12-19 15:22 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 [this message]
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
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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