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From: "H. Peter Anvin" <hpa@zytor.com>
To: Borislav Petkov <bp@amd64.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Stephane Eranian <eranian@google.com>,
	linux-kernel@vger.kernel.org, andi@firstfloor.org, mingo@elte.hu,
	ming.m.lin@intel.com, "Yu, Fenghua" <fenghua.yu@intel.com>
Subject: Re: [PATCH] perf/x86: check ucode before disabling PEBS on SandyBridge
Date: Tue, 12 Jun 2012 13:28:55 -0700	[thread overview]
Message-ID: <4FD7A687.3040500@zytor.com> (raw)
In-Reply-To: <20120612194900.GC11137@aftab.osrc.amd.com>

On 06/12/2012 12:49 PM, Borislav Petkov wrote:
> 
> Also, I'd assume we need some of the current functionality to be able to
> load ucode without rebooting the box.
> 

Yes, the basic idea is that we'll keep the ucode around anyway so we can
feed it to hotplug CPUs or S3 resume.  If the ucode is updated from
userspace we'd replace the in-memory copy and load it into the CPUs.

	-hpa



  reply	other threads:[~2012-06-12 20:29 UTC|newest]

Thread overview: 107+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-07  7:15 [PATCH] perf/x86: check ucode before disabling PEBS on SandyBridge Stephane Eranian
2012-06-07 10:18 ` Peter Zijlstra
2012-06-07 10:35   ` Stephane Eranian
2012-06-07 10:45     ` Peter Zijlstra
2012-06-07 10:48       ` Stephane Eranian
2012-06-07 11:15         ` Peter Zijlstra
2012-06-08  9:35           ` Ingo Molnar
2012-06-08 10:00             ` Peter Zijlstra
2012-06-08 10:03               ` Stephane Eranian
2012-06-08 13:26               ` Peter Zijlstra
2012-06-08 13:51                 ` Borislav Petkov
2012-06-08 13:54                   ` Peter Zijlstra
2012-06-08 14:15                     ` Borislav Petkov
2012-06-08 14:20                       ` Peter Zijlstra
2012-06-08 14:36                         ` Borislav Petkov
2012-06-08 14:45                           ` Peter Zijlstra
2012-06-08 15:09                             ` Borislav Petkov
2012-06-08 13:56                   ` Peter Zijlstra
2012-06-08 14:03                     ` Borislav Petkov
2012-06-08 13:59                   ` Peter Zijlstra
2012-06-08 14:03                     ` Stephane Eranian
2012-06-08 14:17                       ` Borislav Petkov
2012-06-08 16:02                         ` H. Peter Anvin
2012-06-08 21:02                   ` Henrique de Moraes Holschuh
2012-06-08 21:16                     ` Borislav Petkov
2012-06-08 14:07                 ` Stephane Eranian
2012-06-08 14:13                   ` Peter Zijlstra
2012-06-08 14:19                   ` Borislav Petkov
2012-06-08 14:23                   ` Peter Zijlstra
2012-06-08 14:26                     ` Stephane Eranian
2012-06-08 14:25                   ` Peter Zijlstra
2012-06-08 14:26                     ` Stephane Eranian
2012-06-12  8:14                     ` Stephane Eranian
2012-06-08 16:28                 ` Stephane Eranian
2012-06-08 18:49                   ` Peter Zijlstra
2012-06-08 16:50                 ` Andi Kleen
2012-06-08 18:05                 ` Borislav Petkov
2012-06-08 18:52                   ` Peter Zijlstra
2012-06-08 20:38                     ` Borislav Petkov
2012-06-12 17:07                 ` Robert Richter
2012-06-12 17:09                   ` Stephane Eranian
2012-06-12 17:13                     ` Peter Zijlstra
2012-06-12 17:17                       ` Borislav Petkov
2012-06-12 17:18                         ` Peter Zijlstra
2012-06-12 17:23                           ` Borislav Petkov
2012-06-12 17:26                             ` Peter Zijlstra
2012-06-12 17:35                               ` Borislav Petkov
2012-06-12 17:40                                 ` Peter Zijlstra
2012-06-12 18:04                                   ` Andi Kleen
2012-06-12 20:10                                   ` Borislav Petkov
2012-06-13  1:04                                 ` Henrique de Moraes Holschuh
2012-06-13  6:51                                   ` Borislav Petkov
2012-06-13 12:36                                     ` Henrique de Moraes Holschuh
2012-06-13 16:11                                       ` Borislav Petkov
2012-06-13 21:41                                         ` Henrique de Moraes Holschuh
2012-06-15 12:37                                         ` Borislav Petkov
2012-06-15 12:42                                           ` Peter Zijlstra
2012-06-15 12:52                                             ` Borislav Petkov
2012-06-15 16:52                                               ` [PATCH] x86, microcode: Make reload interface per system Borislav Petkov
2012-06-15 17:16                                                 ` Peter Zijlstra
2012-06-15 17:49                                                   ` Borislav Petkov
2012-06-19  2:46                                                 ` Henrique de Moraes Holschuh
2012-06-19  3:31                                                   ` H. Peter Anvin
2012-06-19  5:11                                                     ` Borislav Petkov
2012-06-19  8:17                                                       ` Peter Zijlstra
2012-06-19 10:22                                                         ` Borislav Petkov
2012-06-19 10:26                                                           ` Peter Zijlstra
2012-06-19 15:06                                                             ` Borislav Petkov
2012-06-19 15:57                                                               ` H. Peter Anvin
2012-06-19 18:22                                                             ` Henrique de Moraes Holschuh
2012-06-19 20:22                                                               ` H. Peter Anvin
2012-06-20 23:46                                                                 ` Henrique de Moraes Holschuh
2012-06-20 23:49                                                                   ` H. Peter Anvin
2012-06-21  0:06                                                                     ` Henrique de Moraes Holschuh
2012-06-21  0:18                                                                       ` H. Peter Anvin
2012-06-21  2:33                                                                         ` Henrique de Moraes Holschuh
2012-06-19  5:03                                                   ` Borislav Petkov
2012-06-19 18:57                                                     ` Henrique de Moraes Holschuh
2012-06-19 22:19                                                       ` Borislav Petkov
2012-06-19  2:42                                           ` [PATCH] perf/x86: check ucode before disabling PEBS on SandyBridge Henrique de Moraes Holschuh
2012-06-12 17:23                       ` Robert Richter
2012-06-12 17:15                     ` Borislav Petkov
2012-06-07 13:28   ` Andi Kleen
2012-06-07 13:27 ` Andi Kleen
2012-06-12 18:35 ` H. Peter Anvin
2012-06-12 19:07   ` Borislav Petkov
2012-06-12 19:33     ` Peter Zijlstra
2012-06-12 19:35       ` Andi Kleen
2012-06-12 19:49       ` Borislav Petkov
2012-06-12 20:28         ` H. Peter Anvin [this message]
2012-06-12 20:37           ` Borislav Petkov
2012-06-12 20:42             ` H. Peter Anvin
2012-06-12 20:56               ` Borislav Petkov
2012-06-12 20:58                 ` H. Peter Anvin
2012-06-12 21:04                   ` Borislav Petkov
2012-06-13  8:38                   ` Peter Zijlstra
2012-06-13 14:00                     ` H. Peter Anvin
2012-06-13 15:37                       ` Peter Zijlstra
2012-06-13 15:46                         ` H. Peter Anvin
2012-06-13 12:39               ` Peter Zijlstra
2012-06-13 13:22                 ` H. Peter Anvin
2012-06-13 14:01                 ` Henrique de Moraes Holschuh
2012-06-13  8:32         ` Peter Zijlstra
2012-06-13 13:59           ` H. Peter Anvin
2012-06-13 15:32             ` Peter Zijlstra
2012-06-13 15:38               ` H. Peter Anvin
2012-06-12 20:27       ` H. Peter Anvin

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