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Re: [Qemu-devel] [PATCH V3] target-i386: forward CPUID cache leaves when

From: Eduardo Habkost
Subject: Re: [Qemu-devel] [PATCH V3] target-i386: forward CPUID cache leaves when -cpu host is used
Date: Wed, 4 Sep 2013 14:35:21 -0300
User-agent: Mutt/1.5.21 (2010-09-15)

On Mon, Sep 02, 2013 at 07:09:47PM +0200, Benoît Canet wrote:
> > > 
> > > Signed-off-by: Benoit Canet <address@hidden>
> > 
> > Reviewed-by: Eduardo Habkost <address@hidden>
> Thanks.
> Do you have an idea on how QEMU could reflect the real host clock frequency
> to the guest when the host cpu scaling governor kicks in ?
> Giving a false value to cloud customers is mildly annoying.

Probably you will need changes on KVM, SeaBIOS and QEMU to implement the
interfaces to let the system notify the OS about CPU frequency changes.
I don't know much a lot about ACPI and power management, to know how
much of that is already implemented and how much is missing.


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