From: "Daniel P. Berrangé" <berrange@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Eduardo Habkost" <ehabkost@redhat.com>,
"Borislav Petkov" <bp@alien8.de>, "Jörg Rödel" <joro@8bytes.org>,
"Andre Przywara" <andre.przywara@arm.com>,
"kvm ML" <kvm@vger.kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
"Tom Lendacky" <thomas.lendacky@amd.com>,
"Eric Blake" <eblake@redhat.com>
Subject: Re: kvm: RDTSCP on AMD
Date: Tue, 11 Dec 2018 15:30:17 +0000 [thread overview]
Message-ID: <20181211153017.GN921@redhat.com> (raw)
In-Reply-To: <e4d9a943-2de2-34a7-3f52-ee3d64ea889a@redhat.com>
On Tue, Dec 11, 2018 at 04:23:51PM +0100, Paolo Bonzini wrote:
> On 11/12/18 12:55, Eduardo Habkost wrote:
> >> - Debian Jessie: 4.5
> >> - Debian Stretch: 4.5
> >> - RHEL-7: 3.10
> >> - Ubuntu LTS (Xenial): 4.5
> >> - OpenSUSE Leap 15: 4.12.14
> >>
> >> So we can't require Linux 4.5 as a minimum version at this time.
> > I'd like us to take a step back and consider what exactly
> > "support" means here. QEMU will still work on older kernels if
> > we add RDTSCP to the CPU models, but at the same time I would
> > like to document that our strict runnability guarantees may not
> > be kept if running Linux < 4.5.
>
> Anyway RHEL does have RDTSC support for AMD, and a bunch of other stuff.
> The frankenkernel's KVM is somewhere between 4.5 and 4.10, with a dash
> of 4.20 of course. :)
Great, then, this is a non-issue - we just need to mention that fact
in the commit that sets the min version for the kernel
Regards,
Daniel
--
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next prev parent reply other threads:[~2018-12-11 15:30 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-10 18:13 kvm: RDTSCP on AMD Borislav Petkov
2018-12-10 18:37 ` Eduardo Habkost
2018-12-10 18:41 ` Borislav Petkov
2018-12-10 19:06 ` Eduardo Habkost
2018-12-10 19:42 ` Borislav Petkov
2018-12-10 20:08 ` Eduardo Habkost
2018-12-10 20:39 ` Borislav Petkov
2018-12-11 10:38 ` Daniel P. Berrangé
2018-12-11 11:55 ` Eduardo Habkost
2018-12-11 14:35 ` Daniel P. Berrangé
2018-12-11 15:23 ` Paolo Bonzini
2018-12-11 15:30 ` Daniel P. Berrangé [this message]
2018-12-11 16:14 ` [PATCH] target-i386: Reenable RDTSCP support on Opteron_G[345] CPU models Borislav Petkov
2018-12-11 16:14 ` [Qemu-devel] " Borislav Petkov
2018-12-12 19:52 ` Eduardo Habkost
2018-12-12 19:52 ` [Qemu-devel] " Eduardo Habkost
2018-12-12 20:08 ` [PATCH -v2] target-i386: Reenable RDTSCP support on Opteron_G[345] CPU models " Borislav Petkov
2018-12-12 20:08 ` [Qemu-devel] " Borislav Petkov
2018-12-20 12:10 ` Eduardo Habkost
2018-12-20 12:10 ` [Qemu-devel] " Eduardo Habkost
2018-12-10 19:47 ` kvm: RDTSCP on AMD Eduardo Habkost
2018-12-10 20:16 ` Borislav Petkov
-- strict thread matches above, loose matches on Subject: below --
2016-07-06 12:44 Borislav Petkov
2016-07-06 13:01 ` Paolo Bonzini
2016-07-06 17:34 ` Eduardo Habkost
2016-07-06 21:27 ` Paolo Bonzini
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