linux-kernel - Re: [PATCH RFC v2 9/9] selftests/x86/apx: Add APX test

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <005c633c-aabe-4e60-9cb5-31cde7d30df7@intel.com>
Date: Mon, 14 Apr 2025 09:02:14 -0700
From: Sohil Mehta <sohil.mehta@...el.com>
To: "Chang S. Bae" <chang.seok.bae@...el.com>
CC: <x86@...nel.org>, <tglx@...utronix.de>, <mingo@...hat.com>,
	<bp@...en8.de>, <dave.hansen@...ux.intel.com>, LKML Mailing List
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RFC v2 9/9] selftests/x86/apx: Add APX test

On 3/20/2025 4:43 PM, Chang S. Bae wrote:
> The extended general-purpose registers for APX may contain random data,
> which is currently assumed by the xstate testing framework. This allows
> the testing of the new userspace feature using the common test code.
> 
> Invoke the test entry function from apx.c after enumerating the
> state component and adding it to the support list
> 
> Signed-off-by: Chang S. Bae <chang.seok.bae@...el.com>
> ---

Reviewed-by: Sohil Mehta <sohil.mehta@...el.com>

AVX and APX have very similar single line testcases. If we end up adding
more, it might be useful to consider merging them into a common file.


> diff --git a/tools/testing/selftests/x86/apx.c b/tools/testing/selftests/x86/apx.c
> new file mode 100644
> index 000000000000..d9c8d41b8c5a
> --- /dev/null
> +++ b/tools/testing/selftests/x86/apx.c
> @@ -0,0 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#define _GNU_SOURCE
> +
> +#include "xstate.h"
> +
> +int main(void)
> +{
> +	test_xstate(XFEATURE_APX);
> +}