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From: Ian Jackson <Ian.Jackson@eu.citrix.com>
To: Paul Durrant <paul.durrant@citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
	Keir Fraser <keir@xen.org>,
	Ian Campbell <ian.campbell@citrix.com>,
	Jan Beulich <jbeulich@suse.com>,
	xen-devel@lists.xen.org
Subject: Re: [PATCH v5 3/3] x86/viridian: Add partition time reference counter MSR support
Date: Tue, 12 Aug 2014 16:27:03 +0100	[thread overview]
Message-ID: <21482.12871.364568.487169@mariner.uk.xensource.com> (raw)
In-Reply-To: <1407244035-25977-4-git-send-email-paul.durrant@citrix.com>

Paul Durrant writes ("[PATCH v5 3/3] x86/viridian: Add partition time reference counter MSR support"):
> This patch optionally re-instates support for the partition time reference
> counter that was previously introduced by commit
> e36cd2cdc9674a7a4855d21fb7b3e6e17c4bb33b and reverted by commit
> 1cd4fab14ce25859efa4a2af13475e6650a5506c. The previous implementation was
> non-optional and flawed.
> 
> This implementation uses the tsc of vcpu0, which is preserved across
> save/restore as part of the architectural state, and then converts that
> to a 100ns tick using the domain's tsc_khz.

The tools part of this is fine except that it does the string to
number conversion in libxl rather than xl, as I have just observed wrt
1/3.

Thanks,
Ian.

  reply	other threads:[~2014-08-12 15:27 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-05 13:07 [PATCH v5 0/3] x86/viridian improvements Paul Durrant
2014-08-05 13:07 ` [PATCH v5 1/3] x86/viridian: Re-purpose the HVM parameter to be a feature mask Paul Durrant
2014-08-12 15:25   ` Ian Jackson
2014-08-13 11:09     ` Paul Durrant
2014-08-26 20:24       ` Ian Campbell
2014-08-26 20:28   ` Ian Campbell
2014-08-27  8:11     ` Paul Durrant
2014-08-05 13:07 ` [PATCH v5 2/3] x86/viridian: Make logging less verbose Paul Durrant
2014-08-05 13:07 ` [PATCH v5 3/3] x86/viridian: Add partition time reference counter MSR support Paul Durrant
2014-08-12 15:27   ` Ian Jackson [this message]
2014-08-13 15:27   ` Egger, Christoph
2014-08-27 14:04     ` Paul Durrant
2014-08-12 10:16 ` [PATCH v5 0/3] x86/viridian improvements Paul Durrant
2014-08-12 10:38   ` Jan Beulich
2014-08-12 11:49     ` Paul Durrant
2014-08-12 12:17       ` Jan Beulich

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