linux-kernel - Re: [PATCH 13/18] arm64: preserve x18 when CPU is suspended

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Message-ID: <CABCJKucm2ETxe2dgJhb4Ruzq72psFMGsx=0D6TVnJ-_DL2FgfA@mail.gmail.com>
Date:   Mon, 21 Oct 2019 15:43:14 -0700
From:   Sami Tolvanen <samitolvanen@...gle.com>
To:     Mark Rutland <mark.rutland@....com>
Cc:     Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Dave Martin <Dave.Martin@....com>,
        Kees Cook <keescook@...omium.org>,
        Laura Abbott <labbott@...hat.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 13/18] arm64: preserve x18 when CPU is suspended

On Mon, Oct 21, 2019 at 9:56 AM Mark Rutland <mark.rutland@....com> wrote:
> This should have a corresponding change to cpu_suspend_ctx in
> <asm/suspend.h>. Otherwise we're corrupting a portion of the stack.

Ugh, correct. I'll fix this in the next version. Thanks.

Sami