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From: "Jan Beulich" <JBeulich@suse.com>
To: xen-devel <xen-devel@lists.xenproject.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: [PATCH 0/8] x86: (allow to) suppress use of hyper-threading
Date: Wed, 11 Jul 2018 05:55:07 -0600	[thread overview]
Message-ID: <5B45F01B02000078001D30FF@prv1-mh.provo.novell.com> (raw)

I've been considering to add a respective command line option for
quite a long time, but never got around to. Now that the TLBleed
information is public[1], we're at point where we not only want,
but need this, and where perhaps it needs to be the default on
affected systems. The first 5 patches are all prerequisites to the
6th one; the final two are simply addressing things I had noticed
while putting together the rest.

1: cpupools: fix state when downing a CPU failed
2: x86: distinguish CPU offlining from CPU removal
3: allow cpu_down() to be called earlier
4: x86/AMD: distinguish compute units from hyper-threads
5: x86: bring up all CPUs even if not all are supposed to be used
6: x86: command line option to avoid use of secondary hyper-threads
7: x86/shim: fully ignore "nosmp" and "maxcpus="
8: cpumask: tidy {,z}alloc_cpumask_var() 

Jan

[1] https://www.vusec.net/projects/tlbleed/



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             reply	other threads:[~2018-07-11 11:55 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-11 11:55 Jan Beulich [this message]
2018-07-11 12:04 ` [PATCH 1/8] cpupools: fix state when downing a CPU failed Jan Beulich
2018-07-11 12:06 ` [PATCH 2/8] x86: distinguish CPU offlining from CPU removal Jan Beulich
2018-07-12 10:53   ` Wei Liu
2018-07-12 11:48     ` Jan Beulich
2018-07-13  8:39       ` Wei Liu
2018-07-12 12:42   ` Andrew Cooper
2018-07-11 12:06 ` [PATCH 3/8] allow cpu_down() to be called earlier Jan Beulich
2018-07-12 10:55   ` Wei Liu
2018-07-12 12:44   ` Andrew Cooper
2018-07-11 12:07 ` [PATCH 4/8] x86/AMD: distinguish compute units from hyper-threads Jan Beulich
2018-07-11 18:11   ` Brian Woods
2018-07-12 13:02   ` Andrew Cooper
2018-07-12 14:22     ` Jan Beulich
2018-07-11 12:09 ` [PATCH 5/8] x86: bring up all CPUs even if not all are supposed to be used Jan Beulich
2018-07-12 15:38   ` Andrew Cooper
2018-07-13  8:11     ` Jan Beulich
2018-07-11 12:10 ` [PATCH 6/8] x86: (command line option to) avoid use of secondary hyper-threads Jan Beulich
2018-07-12 15:45   ` Andrew Cooper
2018-07-13  8:13     ` Jan Beulich
2018-07-16 12:37       ` Andrew Cooper
2018-07-16 12:53         ` Jan Beulich
2018-07-16 13:01           ` Andrew Cooper
2018-07-11 12:11 ` [PATCH 7/8] x86/shim: fully ignore "nosmp" and "maxcpus=" Jan Beulich
2018-07-11 12:23   ` Andrew Cooper
2018-07-11 15:18   ` Roger Pau Monné
2018-07-11 16:02   ` Wei Liu
2018-07-11 12:12 ` [PATCH 8/8] cpumask: tidy {,z}alloc_cpumask_var() Jan Beulich
2018-07-11 12:20   ` Andrew Cooper
2018-07-12 15:13   ` Wei Liu
     [not found] ` <5B45F26A02000078001D312F@suse.com>
2018-07-13  9:02   ` [PATCH 1/8] cpupools: fix state when downing a CPU failed Juergen Gross
2018-07-16  9:17     ` Jan Beulich
     [not found]     ` <5B4C629002000078001D4346@suse.com>
2018-07-16 11:47       ` Juergen Gross
2018-07-16 12:19         ` Jan Beulich
     [not found]         ` <5B4C8D3702000078001D45EA@suse.com>
2018-07-16 12:47           ` Juergen Gross
2018-07-16 13:01             ` Jan Beulich
     [not found]             ` <5B4C973D02000078001D4693@suse.com>
2018-07-16 14:21               ` Juergen Gross
2018-07-16 14:26                 ` Jan Beulich
     [not found]                 ` <5B4CAB1202000078001D47BC@suse.com>
2018-07-16 14:53                   ` Juergen Gross

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