From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
Kees Cook <keescook@chromium.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Kristina Martsenko <kristina.martsenko@arm.com>,
Dave Martin <Dave.Martin@arm.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
James Morse <james.morse@arm.com>,
Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>,
Amit Daniel Kachhap <amit.kachhap@arm.com>,
Vincenzo Frascino <Vincenzo.Frascino@arm.com>,
Will Deacon <will@kernel.org>, Ard Biesheuvel <ardb@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v5 16/17] arm64: compile the kernel with ptrauth return address signing
Date: Mon, 2 Mar 2020 13:16:48 +0000 [thread overview]
Message-ID: <20200302131648.GE4166@sirena.org.uk> (raw)
In-Reply-To: <20200228182337.GK4019108@arrakis.emea.arm.com>
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On Fri, Feb 28, 2020 at 06:23:37PM +0000, Catalin Marinas wrote:
> On Mon, Feb 17, 2020 at 02:57:47PM +0530, Amit Daniel Kachhap wrote:
> > +# only to the assembler when clang is selected as a compiler. For the GNU toolchain
> > +# this option is not used.
> > +branch-prot-flags-$(CONFIG_AS_HAS_PAC) += -Wa,-march=armv8.3-a
> > +KBUILD_CFLAGS += $(branch-prot-flags-y)
> > +endif
> Does this work with the clang integrated assembler? AFAIK it ignores the
> -Wa, though it may be fine with the instructions generated by the
> compiler. (while we don't officially support it, we merged patches to
> facilitate it).
If the assembler integrated into the compiler doesn't cope with
instructions emitted by the compiler that seems like something we should
push to get fixed on the compiler side.
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next prev parent reply other threads:[~2020-03-02 13:16 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-17 9:27 [PATCH v5 00/17] arm64: return address signing Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 01/17] arm64: cpufeature: Fix meta-capability cpufeature check Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 02/17] arm64: cpufeature: add pointer auth meta-capabilities Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 03/17] arm64: rename ptrauth key structures to be user-specific Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 04/17] arm64: install user ptrauth keys at kernel exit time Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 05/17] arm64: create macro to park cpu in an infinite loop Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 06/17] arm64: add bootup/runtime flags for __cpu_setup Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 07/17] arm64: cpufeature: handle conflicts based on capability Amit Daniel Kachhap
2020-02-28 18:18 ` Catalin Marinas
2020-03-02 9:29 ` Amit Kachhap
2020-02-17 9:27 ` [PATCH v5 08/17] arm64: enable ptrauth earlier Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 09/17] arm64: initialize and switch ptrauth kernel keys Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 10/17] arm64: initialize ptrauth keys for kernel booting task Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 11/17] arm64: mask PAC bits of __builtin_return_address Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 12/17] arm64: unwind: strip PAC from kernel addresses Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 13/17] arm64: __show_regs: strip PAC from lr in printk Amit Daniel Kachhap
2020-02-17 9:27 ` [PATCH v5 14/17] arm64: suspend: restore the kernel ptrauth keys Amit Daniel Kachhap
2020-02-28 18:18 ` Catalin Marinas
2020-03-02 10:13 ` Amit Kachhap
2020-02-17 9:27 ` [PATCH v5 15/17] kconfig: Add support for 'as-option' Amit Daniel Kachhap
2020-02-17 9:27 ` Amit Daniel Kachhap
2020-02-17 9:39 ` Masahiro Yamada
2020-02-17 9:39 ` Masahiro Yamada
2020-02-17 10:16 ` Vincenzo Frascino
2020-02-17 10:16 ` Vincenzo Frascino
2020-02-18 0:37 ` Masahiro Yamada
2020-02-18 0:37 ` Masahiro Yamada
2020-02-18 10:14 ` Vincenzo Frascino
2020-02-18 10:14 ` Vincenzo Frascino
2020-02-17 9:27 ` [PATCH v5 16/17] arm64: compile the kernel with ptrauth return address signing Amit Daniel Kachhap
2020-02-28 18:23 ` Catalin Marinas
2020-03-02 10:19 ` Amit Kachhap
2020-03-02 13:16 ` Mark Brown [this message]
2020-03-04 11:01 ` Vincenzo Frascino
2020-03-03 9:28 ` Amit Kachhap
2020-03-04 10:53 ` Vincenzo Frascino
2020-02-17 9:27 ` [PATCH v5 17/17] lkdtm: arm64: test kernel pointer authentication Amit Daniel Kachhap
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