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From: "Jan Beulich" <JBeulich@suse.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Xen-devel <xen-devel@lists.xen.org>
Subject: Re: [PATCH 05/10] x86/cpuid: Handle leaf 0x5 in guest_cpuid()
Date: Tue, 21 Feb 2017 10:22:01 -0700	[thread overview]
Message-ID: <58AC8549020000780013C652@prv-mh.provo.novell.com> (raw)
In-Reply-To: <1487588434-4359-6-git-send-email-andrew.cooper3@citrix.com>

>>> On 20.02.17 at 12:00, <andrew.cooper3@citrix.com> wrote:
> The MONITOR flag isn't exposed to guests.  The existing toolstack logic, and
> pv_cpuid() in the hypervisor, zero the MONITOR leaf for queries.
> 
> However, the MONITOR leaf is still visible in the hardware domains native
> CPUID view, and Linux depends on this to set up C-state information.  Leak the
> hosts MONITOR leaf under the same circumstances that the MONITOR feature is
> leaked.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Reviewed-by: Jan Beulich <jbeulich@suse.com>



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  reply	other threads:[~2017-02-21 17:22 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-20 11:00 [PATCH 00/10] x86/cpuid: Remove the legacy infrastructure Andrew Cooper
2017-02-20 11:00 ` [PATCH 01/10] x86/cpuid: Disallow policy updates once the domain is running Andrew Cooper
2017-02-21 16:37   ` Jan Beulich
2017-02-20 11:00 ` [PATCH 02/10] x86/gen-cpuid: Clarify the intended meaning of AVX wrt feature dependencies Andrew Cooper
2017-02-21 16:40   ` Jan Beulich
2017-02-21 16:41     ` Andrew Cooper
2017-02-21 16:47     ` Jan Beulich
2017-02-21 16:53       ` Andrew Cooper
2017-02-21 17:07         ` Jan Beulich
2017-02-21 17:12           ` Andrew Cooper
2017-02-21 17:17             ` Jan Beulich
2017-02-21 17:42               ` Andrew Cooper
2017-02-22  7:13                 ` Jan Beulich
2017-02-20 11:00 ` [PATCH 03/10] x86/cpuid: Handle leaf 0x1 in guest_cpuid() Andrew Cooper
2017-02-21 16:59   ` Jan Beulich
2017-02-21 17:13     ` Andrew Cooper
2017-02-21 17:20       ` Jan Beulich
2017-02-21 17:29         ` Andrew Cooper
2017-02-22  7:16           ` Jan Beulich
2017-02-20 11:00 ` [PATCH 04/10] x86/cpuid: Handle leaf 0x4 " Andrew Cooper
2017-02-21 17:16   ` Jan Beulich
2017-02-21 17:35     ` Andrew Cooper
2017-02-22  7:23       ` Jan Beulich
2017-02-22  7:55         ` Andrew Cooper
2017-03-10 16:27   ` [PATCH v2 " Andrew Cooper
2017-03-13 12:03     ` Jan Beulich
2017-03-13 12:51       ` Andrew Cooper
2017-03-13 13:05         ` Jan Beulich
2017-03-13 13:24           ` Andrew Cooper
2017-03-13 13:36             ` Jan Beulich
2017-02-20 11:00 ` [PATCH 05/10] x86/cpuid: Handle leaf 0x5 " Andrew Cooper
2017-02-21 17:22   ` Jan Beulich [this message]
2017-02-20 11:00 ` [PATCH 06/10] x86/cpuid: Handle leaf 0x6 " Andrew Cooper
2017-02-21 17:25   ` Jan Beulich
2017-02-21 17:40     ` Andrew Cooper
2017-02-21 17:44       ` Andrew Cooper
2017-02-22  7:31       ` Jan Beulich
2017-02-22  8:23         ` Andrew Cooper
2017-02-22  9:12           ` Andrew Cooper
2017-02-22  9:26             ` Jan Beulich
2017-02-27 14:30               ` Andrew Cooper
2017-03-10 16:32   ` [PATCH v2 " Andrew Cooper
2017-03-13 12:04     ` Jan Beulich
2017-02-20 11:00 ` [PATCH 07/10] x86/cpuid: Handle leaf 0xa " Andrew Cooper
2017-02-22  9:11   ` Jan Beulich
2017-02-20 11:00 ` [PATCH 08/10] x86/cpuid: Handle leaf 0xb " Andrew Cooper
2017-02-22  9:16   ` Jan Beulich
2017-02-22 10:22     ` Andrew Cooper
2017-02-22 10:37       ` Jan Beulich
2017-02-27 15:05         ` Andrew Cooper
2017-03-10 16:44   ` [PATCH v2 " Andrew Cooper
2017-03-13 12:13     ` Jan Beulich
2017-02-20 11:00 ` [PATCH 09/10] x86/cpuid: Drop legacy CPUID infrastructure Andrew Cooper
2017-02-22  9:19   ` Jan Beulich
2017-02-20 11:00 ` [PATCH 10/10] x86/cpuid: Always enable faulting for the control domain Andrew Cooper
2017-02-22  9:23   ` Jan Beulich
2017-02-22 10:00     ` Andrew Cooper
2017-02-22 10:10       ` Jan Beulich
2017-02-27 15:10         ` Andrew Cooper
2017-02-28  9:31           ` Jan Beulich
2017-03-10 17:10             ` Andrew Cooper
2017-03-13 11:48               ` Jan Beulich
2017-03-14 15:06                 ` Wei Liu
2017-03-14 15:13                   ` Jan Beulich
2017-03-14 16:05                     ` Wei Liu

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