From: Petteri Aimonen <jpa@git.mail.kapsi.fi>
To: Shuah Khan <skhan@linuxfoundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>,
Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@alien8.de>,
Shuah Khan <shuah@kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
"H. Peter Anvin" <hpa@zytor.com>, x86-ml <x86@kernel.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] arch/x86: reset MXCSR to default in kernel_fpu_begin()
Date: Wed, 3 Jun 2020 08:19:46 +0300 [thread overview]
Message-ID: <20200603051946.GF17423@lakka.kapsi.fi> (raw)
In-Reply-To: <b4629042-21c7-2b38-4c3f-44f9be469cca@linuxfoundation.org>
Hi,
> Is it correct to assume the stuff checked differs from test to test
> and done in user-space.
>
> > undo_evil_state();
>
> Is it correct to assume undoing evil differs from test to test
> and done in user-space, provide it can be done from userspace.
Yes, currently the test works like:
do_test_setup();
read_from_debugfs_file();
check_results();
and the middle step stays the same. But of course in general case there
could be argument passing etc, even though the test for this issue
doesn't need them.
Myself I don't see the problem with just adding a file under debugfs and
bind to its read.
--
Petteri
next prev parent reply other threads:[~2020-06-03 5:20 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-02 10:11 [PATCH] arch/x86: reset MXCSR to default in kernel_fpu_begin() Borislav Petkov
2020-06-02 10:29 ` Petteri Aimonen
2020-06-02 10:56 ` Borislav Petkov
2020-06-02 17:03 ` Andy Lutomirski
2020-06-02 17:27 ` Shuah Khan
2020-06-02 19:50 ` Andy Lutomirski
2020-06-02 20:25 ` Shuah Khan
2020-06-03 5:19 ` Petteri Aimonen [this message]
2020-06-11 14:38 ` Shuah Khan
2020-06-11 7:36 ` Petteri Aimonen
2020-06-11 9:18 ` Borislav Petkov
2020-06-11 14:19 ` Andy Lutomirski
2020-06-11 14:50 ` Shuah Khan
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