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Re: [Xen-devel] [PATCH SpectreV1+L1TF v7 4/9] nospec: introduce evaluate_nospec
- To: Norbert Manthey <nmanthey@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Julien Grall <Julien.Grall@xxxxxxx>
- Date: Thu, 21 Feb 2019 09:47:16 +0000
- Accept-language: en-US
- Authentication-results: spf=none (sender IP is ) smtp.mailfrom=Julien.Grall@xxxxxxx;
- Cc: Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>, Martin Pohlack <mpohlack@xxxxxxxxx>, Pawel Wieczorkiewicz <wipawel@xxxxxxxxx>, Bjoern Doebel <doebel@xxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Martin Mazein <amazein@xxxxxxxxx>, Julian Stecklina <jsteckli@xxxxxxxxx>, nd <nd@xxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, David Woodhouse <dwmw@xxxxxxxxxxxx>
- Delivery-date: Thu, 21 Feb 2019 09:47:29 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-index: AQHUyb6creINlOufd0mbwEaAkg3xiaXqAVsA
- Thread-topic: [Xen-devel] [PATCH SpectreV1+L1TF v7 4/9] nospec: introduce evaluate_nospec
Hi Norbert,
On 21/02/2019 08:16, Norbert Manthey wrote:
> diff --git a/xen/include/asm-arm/nospec.h b/xen/include/asm-arm/nospec.h
> new file mode 100644
> --- /dev/null
> +++ b/xen/include/asm-arm/nospec.h
> @@ -0,0 +1,20 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/* Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved. */
> +
> +#ifndef _ASM_ARM_NOSPEC_H
> +#define _ASM_ARM_NOSPEC_H
> +
> +#define evaluate_nospec(condition) (condition)
> +
> +#define block_speculation()
NIT: Could you turn this to a static inline?
With that for the Arm code:
Acked-by: Julien Grall <julien.grall@xxxxxxx>
Cheers,
--
Julien Grall
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