From: Eduardo Habkost <ehabkost@redhat.com>
To: "Moger, Babu" <Babu.Moger@amd.com>
Cc: "geoff@hostfission.com" <geoff@hostfission.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"mst@redhat.com" <mst@redhat.com>,
"kash@tripleback.net" <kash@tripleback.net>,
"mtosatti@redhat.com" <mtosatti@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
Jiri Denemark <jdenemar@redhat.com>,
"rth@twiddle.net" <rth@twiddle.net>
Subject: Re: [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU
Date: Wed, 13 Jun 2018 14:18:20 -0300 [thread overview]
Message-ID: <20180613171820.GC7451@localhost.localdomain> (raw)
In-Reply-To: <DM5PR12MB2471C966B5B16FFCACDF33F3957E0@DM5PR12MB2471.namprd12.prod.outlook.com>
On Wed, Jun 13, 2018 at 04:52:18PM +0000, Moger, Babu wrote:
[...]
> > What do you think our options are here?
>
> Should we drop automatic topoext completely and move forward?
> What are your thoughts?
Let's drop automatic topoext by now, and see if we find solutions
later. I don't want to hold the rest of the patches because of
this.
I'm thinking we could simply make kvm_arch_get_supported_cpuid()
always return TOPOEXT on AMD CPUs, because the feature flag don't
really depend on any KVM code to work (is that correct?).
--
Eduardo
WARNING: multiple messages have this Message-ID (diff)
From: Eduardo Habkost <ehabkost@redhat.com>
To: "Moger, Babu" <Babu.Moger@amd.com>
Cc: "mst@redhat.com" <mst@redhat.com>,
"marcel.apfelbaum@gmail.com" <marcel.apfelbaum@gmail.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"rth@twiddle.net" <rth@twiddle.net>,
"mtosatti@redhat.com" <mtosatti@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"kash@tripleback.net" <kash@tripleback.net>,
"geoff@hostfission.com" <geoff@hostfission.com>,
Jiri Denemark <jdenemar@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU
Date: Wed, 13 Jun 2018 14:18:20 -0300 [thread overview]
Message-ID: <20180613171820.GC7451@localhost.localdomain> (raw)
In-Reply-To: <DM5PR12MB2471C966B5B16FFCACDF33F3957E0@DM5PR12MB2471.namprd12.prod.outlook.com>
On Wed, Jun 13, 2018 at 04:52:18PM +0000, Moger, Babu wrote:
[...]
> > What do you think our options are here?
>
> Should we drop automatic topoext completely and move forward?
> What are your thoughts?
Let's drop automatic topoext by now, and see if we find solutions
later. I don't want to hold the rest of the patches because of
this.
I'm thinking we could simply make kvm_arch_get_supported_cpuid()
always return TOPOEXT on AMD CPUs, because the feature flag don't
really depend on any KVM code to work (is that correct?).
--
Eduardo
next prev parent reply other threads:[~2018-06-13 17:18 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-08 22:56 [PATCH v13 0/5] i386: Enable TOPOEXT to support hyperthreading on AMD CPU Babu Moger
2018-06-08 22:56 ` [Qemu-devel] " Babu Moger
2018-06-08 22:56 ` [PATCH v13 1/5] i386: Add support for CPUID_8000_001E for AMD Babu Moger
2018-06-08 22:56 ` [Qemu-devel] " Babu Moger
2018-06-11 20:54 ` Eduardo Habkost
2018-06-11 20:54 ` [Qemu-devel] " Eduardo Habkost
2018-06-11 21:02 ` Moger, Babu
2018-06-11 21:02 ` [Qemu-devel] " Moger, Babu
2020-06-02 17:52 ` Eduardo Habkost
2020-06-02 17:52 ` Eduardo Habkost
2020-06-03 23:57 ` Babu Moger
2020-06-03 23:57 ` Babu Moger
2020-06-04 14:06 ` Babu Moger
2020-06-04 14:06 ` Babu Moger
2020-06-04 20:54 ` Eduardo Habkost
2020-06-04 20:54 ` Eduardo Habkost
2020-06-05 16:21 ` Babu Moger
2020-06-05 16:21 ` Babu Moger
2018-06-08 22:56 ` [PATCH v13 2/5] i386: Introduce auto_topoext bit to manage topoext Babu Moger
2018-06-08 22:56 ` [Qemu-devel] " Babu Moger
2018-06-11 20:25 ` Moger, Babu
2018-06-11 20:25 ` [Qemu-devel] " Moger, Babu
2018-06-11 20:46 ` Eduardo Habkost
2018-06-11 20:46 ` [Qemu-devel] " Eduardo Habkost
2018-06-11 20:59 ` Moger, Babu
2018-06-11 20:59 ` [Qemu-devel] " Moger, Babu
2018-06-11 21:05 ` Eduardo Habkost
2018-06-11 21:05 ` [Qemu-devel] " Eduardo Habkost
2018-06-11 21:20 ` Moger, Babu
2018-06-11 21:20 ` [Qemu-devel] " Moger, Babu
2018-06-08 22:56 ` [PATCH v13 3/5] i386: Enable TOPOEXT feature on AMD EPYC CPU Babu Moger
2018-06-08 22:56 ` [Qemu-devel] " Babu Moger
2018-06-11 20:50 ` Eduardo Habkost
2018-06-11 20:50 ` [Qemu-devel] " Eduardo Habkost
2018-06-11 21:01 ` Moger, Babu
2018-06-11 21:01 ` [Qemu-devel] " Moger, Babu
2018-06-11 21:10 ` Eduardo Habkost
2018-06-11 21:10 ` [Qemu-devel] " Eduardo Habkost
2018-06-12 16:29 ` Moger, Babu
2018-06-12 16:29 ` [Qemu-devel] " Moger, Babu
2018-06-12 17:40 ` Eduardo Habkost
2018-06-12 17:40 ` [Qemu-devel] " Eduardo Habkost
2018-06-12 18:38 ` Moger, Babu
2018-06-12 18:38 ` [Qemu-devel] " Moger, Babu
2018-06-12 19:05 ` Eduardo Habkost
2018-06-12 19:05 ` [Qemu-devel] " Eduardo Habkost
2018-06-12 19:46 ` Babu Moger
2018-06-12 19:46 ` [Qemu-devel] " Babu Moger
2018-06-13 16:52 ` Moger, Babu
2018-06-13 16:52 ` [Qemu-devel] " Moger, Babu
2018-06-13 17:18 ` Eduardo Habkost [this message]
2018-06-13 17:18 ` Eduardo Habkost
2018-06-13 18:10 ` Moger, Babu
2018-06-13 18:10 ` [Qemu-devel] " Moger, Babu
2018-06-13 18:12 ` Moger, Babu
2018-06-13 18:12 ` [Qemu-devel] " Moger, Babu
2018-06-13 18:17 ` Eduardo Habkost
2018-06-13 18:17 ` [Qemu-devel] " Eduardo Habkost
2018-06-13 18:21 ` Moger, Babu
2018-06-13 18:21 ` [Qemu-devel] " Moger, Babu
2018-06-13 18:49 ` Eduardo Habkost
2018-06-13 18:49 ` [Qemu-devel] " Eduardo Habkost
2018-06-14 0:58 ` Moger, Babu
2018-06-14 0:58 ` [Qemu-devel] " Moger, Babu
2018-06-08 22:56 ` [PATCH v13 4/5] i386: Verify and enable topoext feature if supported Babu Moger
2018-06-08 22:56 ` [Qemu-devel] " Babu Moger
2018-06-11 20:51 ` Eduardo Habkost
2018-06-11 20:51 ` [Qemu-devel] " Eduardo Habkost
2018-06-11 21:01 ` Moger, Babu
2018-06-11 21:01 ` [Qemu-devel] " Moger, Babu
2018-06-08 22:56 ` [PATCH v13 5/5] i386: Remove generic SMT thread check Babu Moger
2018-06-08 22:56 ` [Qemu-devel] " Babu Moger
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