From: Kyle Huey <me@kylehuey.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Kevin Tian <kevin.tian@intel.com>, Wei Liu <wei.liu2@citrix.com>,
Jun Nakajima <jun.nakajima@intel.com>,
xen-devel@lists.xen.org, Jan Beulich <JBeulich@suse.com>,
Robert O'Callahan <robert@ocallahan.org>
Subject: Re: [PATCH v5] x86/Intel: virtualize support for cpuid faulting
Date: Fri, 21 Oct 2016 08:51:38 -0700 [thread overview]
Message-ID: <CAP045ApYSW8Uhxwar+x6ys2oBjizDMORWN-zKGMZkyvsCVM9XQ@mail.gmail.com> (raw)
In-Reply-To: <63156e9b-9cc4-6403-2e46-e3b04f9d9a14@citrix.com>
On Thu, Oct 20, 2016 at 9:19 AM, Andrew Cooper
<andrew.cooper3@citrix.com> wrote:
> On 20/10/16 15:15, Wei Liu wrote:
>> On Thu, Oct 20, 2016 at 06:44:26AM -0700, Kyle Huey wrote:
>>> rr (http://rr-project.org/), a Linux userspace record-and-replay reverse-
>>> execution debugger, would like to trap and emulate the CPUID instruction.
>>> This would allow us to a) mask away certain hardware features that rr does
>>> not support (e.g. RDRAND) and b) enable trace portability across machines
>>> by providing constant results. Patches for support in the Linux kernel are in
>>> flight, and we'd like to be able to use this feature on virtualized Linux
>>> instances as well.
>>>
>>> Changes since v4:
>>> - Renamed cpuid_fault to cpuid_faulting across the patch.
>>> - Various style nits.
>>> - Added Reviewed-by Kevin Tian.
>>>
>> Release-acked-by: Wei Liu <wei.liu2@citrix.com>
>
> Committed, along with its regression test.
>
> Thanks.
>
> ~Andrew
Great! Thanks for all your help.
- Kyle
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prev parent reply other threads:[~2016-10-21 15:51 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-20 13:44 [PATCH v5] x86/Intel: virtualize support for cpuid faulting Kyle Huey
2016-10-20 13:44 ` [PATCH v5 1/2] x86/Intel: Expose cpuid_faulting_enabled so it can be used elsewhere Kyle Huey
2016-10-20 13:44 ` [PATCH v5 2/2] x86/Intel: virtualize support for cpuid faulting Kyle Huey
2016-10-20 14:04 ` Andrew Cooper
2016-10-20 14:15 ` [PATCH v5] " Wei Liu
2016-10-20 16:19 ` Andrew Cooper
2016-10-21 15:51 ` Kyle Huey [this message]
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