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From: Paolo Bonzini <pbonzini@redhat.com>
To: "Eduardo Habkost" <ehabkost@redhat.com>,
	"Daniel P. Berrangé" <berrange@redhat.com>
Cc: "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 16:23:51 +0100	[thread overview]
Message-ID: <e4d9a943-2de2-34a7-3f52-ee3d64ea889a@redhat.com> (raw)
In-Reply-To: <20181211115546.GQ4669@habkost.net>

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. :)

Paolo

  parent reply	other threads:[~2018-12-11 15:24 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 [this message]
2018-12-11 15:30                 ` Daniel P. Berrangé
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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