From: Jan Kiszka <jan.kiszka@siemens.com>
To: "Liu, Jinsong" <jinsong.liu@intel.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Marcelo Tosatti <mtosatti@redhat.com>,
Avi Kivity <avi@redhat.com>, kvm <kvm@vger.kernel.org>,
Alexey Zaytsev <alexey.zaytsev@gmail.com>
Subject: Re: [Qemu-devel] [PATCH 2/2] Expose tsc deadline timer cpuid to guest
Date: Tue, 06 Mar 2012 11:14:55 +0100 [thread overview]
Message-ID: <4F55E39F.6020608@siemens.com> (raw)
In-Reply-To: <DE8DF0795D48FD4CA783C40EC82923350CA40D@SHSMSX101.ccr.corp.intel.com>
On 2012-03-06 08:49, Liu, Jinsong wrote:
> Jan,
>
> Any comments? I feel some confused about your point 'disable cpuid feature for older machine types by default': are you planning a common approach for this common issue, or, you just ask me a specific solution for the tsc deadline timer case?
I think a generic solution for this can be as simple as passing a
feature exclusion mask to cpu_init. You could simple append a string of
"-feature1,-feature2" to the cpu model that is specified on creation.
And that string could be defined in the compat machine descriptions.
Does this make sense?
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
WARNING: multiple messages have this Message-ID (diff)
From: Jan Kiszka <jan.kiszka@siemens.com>
To: "Liu, Jinsong" <jinsong.liu@intel.com>
Cc: Alexey Zaytsev <alexey.zaytsev@gmail.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
kvm <kvm@vger.kernel.org>, Avi Kivity <avi@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 2/2] Expose tsc deadline timer cpuid to guest
Date: Tue, 06 Mar 2012 11:14:55 +0100 [thread overview]
Message-ID: <4F55E39F.6020608@siemens.com> (raw)
In-Reply-To: <DE8DF0795D48FD4CA783C40EC82923350CA40D@SHSMSX101.ccr.corp.intel.com>
On 2012-03-06 08:49, Liu, Jinsong wrote:
> Jan,
>
> Any comments? I feel some confused about your point 'disable cpuid feature for older machine types by default': are you planning a common approach for this common issue, or, you just ask me a specific solution for the tsc deadline timer case?
I think a generic solution for this can be as simple as passing a
feature exclusion mask to cpu_init. You could simple append a string of
"-feature1,-feature2" to the cpu model that is specified on creation.
And that string could be defined in the compat machine descriptions.
Does this make sense?
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
next prev parent reply other threads:[~2012-03-06 10:15 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-28 21:55 [PATCH 2/2] Expose tsc deadline timer cpuid to guest Liu, Jinsong
2011-12-28 21:55 ` [Qemu-devel] " Liu, Jinsong
2012-01-04 16:48 ` Jan Kiszka
2012-01-04 16:48 ` [Qemu-devel] " Jan Kiszka
2012-01-05 20:07 ` Liu, Jinsong
2012-01-05 20:07 ` [Qemu-devel] " Liu, Jinsong
2012-01-05 20:34 ` Jan Kiszka
2012-01-05 20:34 ` [Qemu-devel] " Jan Kiszka
2012-01-07 18:23 ` Liu, Jinsong
2012-01-07 18:23 ` [Qemu-devel] " Liu, Jinsong
2012-01-08 21:24 ` Jan Kiszka
2012-01-08 21:24 ` [Qemu-devel] " Jan Kiszka
2012-02-27 16:05 ` Liu, Jinsong
2012-02-27 16:05 ` [Qemu-devel] " Liu, Jinsong
2012-02-27 17:18 ` Jan Kiszka
2012-02-27 17:18 ` [Qemu-devel] " Jan Kiszka
2012-02-28 10:30 ` Liu, Jinsong
2012-02-28 10:30 ` [Qemu-devel] " Liu, Jinsong
2012-03-06 7:49 ` Liu, Jinsong
2012-03-06 7:49 ` Liu, Jinsong
2012-03-06 10:14 ` Jan Kiszka [this message]
2012-03-06 10:14 ` Jan Kiszka
2012-03-09 18:27 ` Liu, Jinsong
2012-03-09 18:27 ` [Qemu-devel] " Liu, Jinsong
2012-03-09 18:56 ` Jan Kiszka
2012-03-09 18:56 ` Jan Kiszka
2012-03-09 19:09 ` Liu, Jinsong
2012-03-09 19:09 ` Liu, Jinsong
2012-03-09 20:52 ` Jan Kiszka
2012-03-09 20:52 ` Jan Kiszka
2012-03-10 1:07 ` Andreas Färber
2012-03-10 1:07 ` Andreas Färber
2012-03-11 18:54 ` Liu, Jinsong
2012-03-11 18:54 ` Liu, Jinsong
2012-03-12 17:21 ` Eduardo Habkost
2012-03-25 8:51 ` Liu, Jinsong
2012-03-25 8:51 ` [Qemu-devel] " Liu, Jinsong
2012-03-09 19:29 ` Liu, Jinsong
2012-03-09 19:29 ` [Qemu-devel] " Liu, Jinsong
2012-03-19 22:35 ` Rik van Riel
2012-03-20 12:53 ` Liu, Jinsong
2012-03-20 13:33 ` Eduardo Habkost
2012-03-20 13:33 ` Eduardo Habkost
2012-03-23 3:49 ` Liu, Jinsong
2012-03-23 3:49 ` Liu, Jinsong
2012-03-23 13:46 ` Eduardo Habkost
2012-03-23 13:46 ` Eduardo Habkost
2012-03-23 14:17 ` Liu, Jinsong
2012-03-23 14:17 ` Liu, Jinsong
2012-04-19 20:03 ` Eduardo Habkost
2012-04-20 10:12 ` Jan Kiszka
2012-04-20 15:00 ` Eduardo Habkost
2012-04-20 15:19 ` [Qemu-devel] " Jan Kiszka
2012-04-20 15:36 ` Eduardo Habkost
2012-04-21 7:23 ` Jan Kiszka
2012-04-23 14:48 ` Eduardo Habkost
2012-04-23 16:31 ` Jan Kiszka
2012-04-23 20:02 ` Eduardo Habkost
2012-04-24 16:06 ` Jan Kiszka
2012-04-24 17:19 ` [Qemu-devel] " Eduardo Habkost
2012-05-07 18:21 ` Semantics of "-cpu host" (was Re: [Qemu-devel] [PATCH 2/2] Expose tsc deadline timer cpuid to guest) Eduardo Habkost
2012-05-07 18:21 ` [Qemu-devel] Semantics of "-cpu host" (was " Eduardo Habkost
2012-05-08 0:58 ` Alexander Graf
2012-05-08 0:58 ` [Qemu-devel] " Alexander Graf
2012-05-08 20:14 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Eduardo Habkost
2012-05-08 20:14 ` [Qemu-devel] Semantics of "-cpu host" (was " Eduardo Habkost
2012-05-08 22:07 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Alexander Graf
2012-05-08 22:07 ` [Qemu-devel] Semantics of "-cpu host" (was " Alexander Graf
2012-05-09 8:14 ` Gleb Natapov
2012-05-09 8:14 ` [Qemu-devel] " Gleb Natapov
2012-05-09 8:42 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Alexander Graf
2012-05-09 8:42 ` [Qemu-devel] Semantics of "-cpu host" (was " Alexander Graf
2012-05-09 8:51 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Gleb Natapov
2012-05-09 8:51 ` [Qemu-devel] Semantics of "-cpu host" (was " Gleb Natapov
2012-05-09 9:05 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Alexander Graf
2012-05-09 9:05 ` [Qemu-devel] Semantics of "-cpu host" (was " Alexander Graf
2012-05-09 9:38 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Gleb Natapov
2012-05-09 9:38 ` [Qemu-devel] Semantics of "-cpu host" (was " Gleb Natapov
2012-05-09 9:54 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Alexander Graf
2012-05-09 9:54 ` [Qemu-devel] Semantics of "-cpu host" (was " Alexander Graf
2012-05-09 19:38 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Eduardo Habkost
2012-05-09 19:38 ` [Qemu-devel] Semantics of "-cpu host" (was " Eduardo Habkost
2012-05-09 20:30 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Alexander Graf
2012-05-09 20:30 ` [Qemu-devel] Semantics of "-cpu host" (was " Alexander Graf
2012-05-10 12:53 ` Gleb Natapov
2012-05-10 12:53 ` [Qemu-devel] " Gleb Natapov
2012-05-10 13:21 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Alexander Graf
2012-05-10 13:21 ` [Qemu-devel] Semantics of "-cpu host" (was " Alexander Graf
2012-05-10 13:39 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Gleb Natapov
2012-05-10 13:39 ` [Qemu-devel] Semantics of "-cpu host" (was " Gleb Natapov
2012-05-10 14:12 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Eduardo Habkost
2012-05-10 14:12 ` [Qemu-devel] Semantics of "-cpu host" (was " Eduardo Habkost
2012-05-09 7:16 ` Semantics of "-cpu host" (was Re: [Qemu-devel] " Andre Przywara
2012-05-09 7:16 ` [Qemu-devel] Semantics of "-cpu host" (was " Andre Przywara
2012-06-14 19:02 ` [Qemu-devel] [PATCH 2/2] Expose tsc deadline timer cpuid to guest Liu, Jinsong
2012-06-14 19:02 ` Liu, Jinsong
2012-06-14 19:12 ` Eduardo Habkost
2012-06-14 19:12 ` Eduardo Habkost
2012-06-14 19:18 ` Liu, Jinsong
2012-06-14 19:18 ` [Qemu-devel] " Liu, Jinsong
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