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Date: Fri, 1 Nov 2019 13:32:46 -0700
From: Sami Tolvanen <samitolvanen@...gle.com>
To: Kees Cook <keescook@...omium.org>
Cc: Will Deacon <will@...nel.org>, Catalin Marinas <catalin.marinas@....com>, 
	Steven Rostedt <rostedt@...dmis.org>, Masami Hiramatsu <mhiramat@...nel.org>, 
	Ard Biesheuvel <ard.biesheuvel@...aro.org>, Dave Martin <Dave.Martin@....com>, 
	Laura Abbott <labbott@...hat.com>, Mark Rutland <mark.rutland@....com>, 
	Nick Desaulniers <ndesaulniers@...gle.com>, Jann Horn <jannh@...gle.com>, 
	Miguel Ojeda <miguel.ojeda.sandonis@...il.com>, 
	Masahiro Yamada <yamada.masahiro@...ionext.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 v3 11/17] arm64: disable function graph tracing with SCS

On Thu, Oct 31, 2019 at 8:58 PM Kees Cook <keescook@...omium.org> wrote:
> IIRC, the argument was to disable these on a per-arch basis instead of
> doing it as a "depends on !SHADOW_CALL_STACK" in the top-level function
> graph tracer Kconfig?

Yes, that's correct.

> (I'm just thinking ahead to doing this again for
> other architectures, though, I guess, there is much more work than just
> that for, say, x86.)

We can always change this later if needed, and possibly figure out how
to make function graph tracing and kretprobes work with SCS.

Sami

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