From: Thomas Gleixner <tglx@linutronix.de>
To: Sasha Levin <sashal@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>,
Andi Kleen <ak@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>, "Bae\,
Chang Seok" <chang.seok.bae@intel.com>, "Metzger\,
Markus T" <markus.t.metzger@intel.com>,
"hpa\@zytor.com" <hpa@zytor.com>, "bp\@alien8.de" <bp@alien8.de>,
"Hansen\, Dave" <dave.hansen@intel.com>, "Luck\,
Tony" <tony.luck@intel.com>, Pedro Alves <palves@redhat.com>,
Simon Marchi <simark@simark.ca>, "Shankar\,
Ravi V" <ravi.v.shankar@intel.com>,
"linux-kernel\@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v9 00/17] Enable FSGSBASE instructions
Date: Sun, 26 Apr 2020 12:04:16 +0200 [thread overview]
Message-ID: <878siitvfj.fsf@nanos.tec.linutronix.de> (raw)
In-Reply-To: <20200426025243.GJ13035@sasha-vm>
Sasha Levin <sashal@kernel.org> writes:
> On Sun, Apr 26, 2020 at 12:39:27AM +0200, Thomas Gleixner wrote:
>> - Addressed the outstanding review comments
>
> I saw a review that Andy has just sent on patch #1 from the new series,
> I'll address that.
Please look at the last version from Intel as well whether there is anything
outstanding.
>> - Have proper documentation in the changelog of the user space visible
>> ABI changes why it does not break any existing usage and having the
>> relevant people who maintain tools which utilize the affected
>> interfaces Cc'ed on submission.
>
> The cover letter has references to mail correspondence with maintainers
> of these tools that are affected by this change. Each of those exchanges
> goes over what FSGSBASE does and answers any specific questions those
> maintainers had.
>
> If you want it out of the cover letter and into one of the patches I'd
> be happy to do that. If you want me to go chase down another userspace
> which we might be breaking just let me know which.
Yes, please add the information to the changelogs. That's where it
really belongs.
> I didn't want to have them on the Cc line as they have already acked
> this change from their end and I wanted to avoid additional noise. I'll
> be happy to add them back to the next spin of this.
>
>> - Made sure that the cleanups I did when merging them initially have
>> been picked up. I'm not going to waste another couple of days on
>> this mess just to revert it because it hadn't seen any serious
>> testing in development.
>
> Based on your revert
> (https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86/cpu&id=049331f277fef1c3f2527c2c9afa1d285e9a1247)
> I believe that we have all the relevant patches in the series.
Ok.
Thanks,
tglx
next prev parent reply other threads:[~2020-04-26 10:04 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-04 18:15 [PATCH v9 00/17] Enable FSGSBASE instructions Chang S. Bae
2019-10-04 18:15 ` [PATCH v9 01/17] x86/ptrace: Prevent ptrace from clearing the FS/GS selector Chang S. Bae
2019-10-04 18:15 ` [PATCH v9 02/17] selftests/x86/fsgsbase: Test GS selector on ptracer-induced GS base write Chang S. Bae
2019-10-04 18:15 ` [PATCH v9 03/17] x86/cpu: Add 'unsafe_fsgsbase' to enable CR4.FSGSBASE Chang S. Bae
2019-10-04 18:15 ` [PATCH v9 04/17] x86/entry/64: Clean up paranoid exit Chang S. Bae
2019-10-04 18:15 ` [PATCH v9 05/17] x86/entry/64: Switch CR3 before SWAPGS in paranoid entry Chang S. Bae
2019-10-04 18:15 ` [PATCH v9 06/17] x86/entry/64: Introduce the FIND_PERCPU_BASE macro Chang S. Bae
2019-10-04 18:15 ` [PATCH v9 07/17] x86/entry/64: Handle FSGSBASE enabled paranoid entry/exit Chang S. Bae
2019-10-04 18:16 ` [PATCH v9 08/17] x86/entry/64: Document GSBASE handling in the paranoid path Chang S. Bae
2019-10-04 18:16 ` [PATCH v9 09/17] x86/fsgsbase/64: Add intrinsics for FSGSBASE instructions Chang S. Bae
2019-10-04 18:16 ` [PATCH v9 10/17] x86/fsgsbase/64: Enable FSGSBASE instructions in helper functions Chang S. Bae
2019-10-04 18:16 ` [PATCH v9 11/17] x86/fsgsbase/64: Use FSGSBASE in switch_to() if available Chang S. Bae
2019-10-04 18:16 ` [PATCH v9 12/17] x86/fsgsbase/64: Use FSGSBASE instructions on thread copy and ptrace Chang S. Bae
2019-10-04 18:16 ` [PATCH v9 13/17] x86/speculation/swapgs: Check FSGSBASE in enabling SWAPGS mitigation Chang S. Bae
2019-10-04 18:16 ` [PATCH v9 14/17] selftests/x86/fsgsbase: Test ptracer-induced GS base write with FSGSBASE Chang S. Bae
2019-10-04 18:16 ` [PATCH v9 15/17] x86/fsgsbase/64: Enable FSGSBASE on 64bit by default and add a chicken bit Chang S. Bae
2019-10-04 18:16 ` [PATCH v9 16/17] x86/elf: Enumerate kernel FSGSBASE capability in AT_HWCAP2 Chang S. Bae
2019-10-04 18:16 ` [PATCH v9 17/17] Documentation/x86/64: Add documentation for GS/FS addressing mode Chang S. Bae
2019-10-04 22:54 ` Randy Dunlap
2019-11-15 18:29 ` [PATCH v9 00/17] Enable FSGSBASE instructions Thomas Gleixner
2019-11-15 19:12 ` Andi Kleen
2019-11-29 14:56 ` Metzger, Markus T
2019-11-29 16:51 ` Andy Lutomirski
2019-12-02 8:23 ` Metzger, Markus T
2019-12-04 20:20 ` Andy Lutomirski
2019-12-10 8:27 ` Metzger, Markus T
2020-02-24 18:02 ` Bae, Chang Seok
2020-04-13 20:03 ` Sasha Levin
2020-04-14 0:32 ` Andi Kleen
2020-04-17 13:30 ` Sasha Levin
2020-04-17 15:52 ` Andy Lutomirski
2020-04-20 14:13 ` Andi Kleen
2020-04-20 17:14 ` Thomas Gleixner
2020-04-21 16:06 ` Sasha Levin
2020-04-21 16:49 ` Andy Lutomirski
2020-04-21 20:02 ` Andi Kleen
2020-04-21 17:15 ` Bae, Chang Seok
2020-04-21 19:56 ` Andi Kleen
2020-04-21 20:21 ` Andy Lutomirski
2020-04-21 20:51 ` Sasha Levin
2020-04-22 23:00 ` Andy Lutomirski
2020-04-23 4:08 ` Sasha Levin
2020-04-25 22:39 ` Thomas Gleixner
2020-04-26 2:52 ` Sasha Levin
2020-04-26 10:04 ` Thomas Gleixner [this message]
2020-04-14 15:47 ` Bae, Chang Seok
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