From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Jan Beulich <jbeulich@suse.com>
Cc: Xen-devel <xen-devel@lists.xenproject.org>,
"Wei Liu" <wl@xen.org>, "Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [Xen-devel] [PATCH 8/8] x86/cpuid: Enable CPUID Faulting for the control domain
Date: Thu, 12 Sep 2019 10:28:38 +0100 [thread overview]
Message-ID: <f3ef128a-349d-2316-569e-51c5c3f79071@citrix.com> (raw)
In-Reply-To: <5a452903-76d0-0038-47f4-7cb63a8beead@suse.com>
On 12/09/2019 10:07, Jan Beulich wrote:
> On 11.09.2019 22:05, Andrew Cooper wrote:
>> The domain builder no longer uses CPUID instructions for policy decisions.
> How certain are we that there are no other components left relying
> on being able to see raw CPUID output in Dom0?
Cstates and Turbo are the ones already accounted for, but we are going
to have to do something less broken than the current behaviour for PVH Dom0.
> Sadly customers are
> often doing strange things, insisting that they're right in doing
> so. For this reason I wonder whether, at least as a transitional
> measure, we should have a command line option allowing to restore
> prior behavior.
Hmm ok.
~Andrew
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next prev parent reply other threads:[~2019-09-12 9:29 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-11 20:04 [Xen-devel] [PATCH 0/8] x86/cpuid: Switch to using XEN_DOMCTL_set_cpumsr_policy Andrew Cooper
2019-09-11 20:04 ` [Xen-devel] [PATCH 1/8] libx86: Introduce x86_cpu_policies_are_compatible() Andrew Cooper
2019-09-12 7:43 ` Jan Beulich
2019-09-12 7:59 ` Andrew Cooper
2019-09-12 8:22 ` Jan Beulich
2019-09-12 11:41 ` Andrew Cooper
2019-09-11 20:04 ` [Xen-devel] [PATCH 2/8] x86/cpuid: Split update_domain_cpuid_info() in half Andrew Cooper
2019-09-12 7:52 ` Jan Beulich
2019-09-12 8:07 ` Andrew Cooper
2019-09-11 20:04 ` [Xen-devel] [PATCH 3/8] x86/domctl: Implement XEN_DOMCTL_set_cpumsr_policy Andrew Cooper
2019-09-12 8:06 ` Jan Beulich
2019-09-12 13:15 ` Andrew Cooper
2019-09-12 13:20 ` Jan Beulich
2019-09-12 16:34 ` Andrew Cooper
2019-09-11 20:05 ` [Xen-devel] [PATCH 4/8] tools/libxc: Pre-cleanup for xc_cpuid_{set, apply_policy}() Andrew Cooper
2019-09-12 8:09 ` Jan Beulich
2019-09-12 8:17 ` Jan Beulich
2019-09-12 8:38 ` Andrew Cooper
2019-09-11 20:05 ` [Xen-devel] [PATCH 5/8] tools/libxc: Rework xc_cpuid_set() to use {get, set}_cpu_policy() Andrew Cooper
2019-09-12 8:19 ` Jan Beulich
2019-09-12 8:36 ` Andrew Cooper
2019-09-12 9:11 ` Jan Beulich
2019-09-12 13:21 ` Andrew Cooper
2019-09-11 20:05 ` [Xen-devel] [PATCH 6/8] tools/libxc: Rework xc_cpuid_apply_policy() " Andrew Cooper
2019-09-12 9:02 ` Jan Beulich
2019-09-12 13:47 ` Andrew Cooper
2019-09-11 20:05 ` [Xen-devel] [PATCH 7/8] x86/domctl: Drop XEN_DOMCTL_set_cpuid Andrew Cooper
2019-09-12 9:04 ` Jan Beulich
2019-09-11 20:05 ` [Xen-devel] [PATCH 8/8] x86/cpuid: Enable CPUID Faulting for the control domain Andrew Cooper
2019-09-12 9:07 ` Jan Beulich
2019-09-12 9:28 ` Andrew Cooper [this message]
2019-09-12 18:55 ` [Xen-devel] [PATCH v2 8/8] x86/cpuid: Enable CPUID Faulting for the control domain by default Andrew Cooper
2019-09-13 6:38 ` Jan Beulich
2019-09-13 14:56 ` Andrew Cooper
2019-09-12 18:55 ` [Xen-devel] [PATCH v2 0.5/8] libx86: Proactively initialise error pointers Andrew Cooper
2019-09-13 6:20 ` Jan Beulich
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