From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: [patch 3/4] QEMU/KVM: non-virtualized ACPI PMTimer support
Date: Sun, 25 May 2008 14:39:42 -0300
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Cc: Chris Wright <chrisw@redhat.com>, kvm-devel <kvm@vger.kernel.org>
To: Avi Kivity <avi@qumranet.com>
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On Sun, May 25, 2008 at 01:19:30PM +0300, Avi Kivity wrote:
> Marcelo Tosatti wrote:
> >QEMU support for direct pmtimer reads. Hopefully its safe, since its a
> >read-only register ?
> >  
> 
> ISTR that pmtimer can be either 24 bit or 32 bit.  Can this cause a problem?

Don't think so, since QEMU/KVM reports a 24-bit timer (tmr_val_ext field
of fadt is zero). If the host has a 32-bit timer, the higher bits are
ignored, and TMR_OF is emulated.