From: Kyle Huey <me@kylehuey.com>
To: Borislav Petkov <bp@suse.de>
Cc: "Robert O'Callahan" <robert@ocallahan.org>,
linux-api@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>, "Peter Zijlstra (Intel)" <peterz@infradead.org>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Len Brown <len.brown@intel.com>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
Huang Rui <ray.huang@amd.com>,
Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>,
Andy Lutomirski <luto@kernel.org>,
Juergen Gross <jgross@suse.com>,
Fenghua Yu <fenghua.yu@intel.com>,
"Luis R. Rodriguez" <mcgrof@kernel.org>,
Denys Vlasenko <dvlasenk@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Kees Cook <keescook@chromium.org>,
Dmitry Vyukov <dvyukov@google.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Jiri Slaby <jslaby@suse.cz>, Michal Hocko <mhocko@suse.com>,
Alex Thorlton <athorlton@sgi.com>,
Vlastimil Babka <vbabka@suse.cz>,
Mateusz Guzik <mguzik@redhat.com>,
Ben Segall <bsegall@google.com>,
John Stultz <john.stultz@linaro.org>,
"open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] prctl,x86 Add PR_[GET|SET]_CPUID for controlling the CPUID instruction.
Date: Tue, 13 Sep 2016 11:42:33 -0700 [thread overview]
Message-ID: <CAP045AqzCq-3LOXjjFtRywT48-CmOYzhZwcY3XLOs8Z9cD2Gmg@mail.gmail.com> (raw)
In-Reply-To: <CAP045ArcuopWtoUTMFLW6zYse6OFX+SUDRqg=fn+Ty6vCPUJ8Q@mail.gmail.com>
On Mon, Sep 12, 2016 at 7:15 AM, Kyle Huey <me@kylehuey.com> wrote:
> On Mon, Sep 12, 2016 at 2:07 AM, Borislav Petkov <bp@suse.de> wrote:
>> On Sun, Sep 11, 2016 at 05:29:23PM -0700, Kyle Huey wrote:
>>> @@ -2162,6 +2168,12 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
>>> case PR_SET_TSC:
>>> error = SET_TSC_CTL(arg2);
>>> break;
>>> + case PR_GET_CPUID:
>>> + error = GET_CPUID_CTL(arg2);
>>> + break;
>>> + case PR_SET_CPUID:
>>> + error = SET_CPUID_CTL(arg2);
>>> + break;
>>> case PR_TASK_PERF_EVENTS_DISABLE:
>>> error = perf_event_task_disable();
>>> break;
>>
>> This whole fun should be in arch_prctl() as it is arch-specific.
>
> Yeah, I was debating about that, and did it this way because of
> PR_SET_TSC. Will fix.
arch_prctl is not yet exposed on 32 bit x86, so we'll have to add that
as well to do this.
- Kyle
next prev parent reply other threads:[~2016-09-13 18:42 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-12 0:29 [PATCH] prctl,x86 Add PR_[GET|SET]_CPUID for controlling the CPUID instruction Kyle Huey
2016-09-12 9:07 ` Borislav Petkov
2016-09-12 14:15 ` Kyle Huey
2016-09-12 14:34 ` Borislav Petkov
2016-09-13 18:42 ` Kyle Huey [this message]
2016-09-12 16:56 ` Andy Lutomirski
2016-09-12 17:18 ` Borislav Petkov
2016-09-12 17:56 ` Jann Horn
2016-09-12 21:07 ` Andy Lutomirski
2016-09-14 6:13 ` Kyle Huey
2016-09-14 18:52 ` Andy Lutomirski
2016-09-14 19:22 ` Andrew Cooper
2016-09-14 19:23 ` Boris Ostrovsky
2016-09-14 19:28 ` Andrew Cooper
2016-09-14 19:36 ` Andy Lutomirski
2016-09-14 19:42 ` Andrew Cooper
2016-09-12 17:37 ` Andi Kleen
2016-09-12 18:25 ` Henrique de Moraes Holschuh
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