From: Avi Kivity <avi@qumranet.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Chris Wright <chrisw@redhat.com>, kvm-devel <kvm@vger.kernel.org>
Subject: Re: [patch 3/4] QEMU/KVM: non-virtualized ACPI PMTimer support
Date: Mon, 26 May 2008 11:23:15 +0300 [thread overview]
Message-ID: <483A7373.2080503@qumranet.com> (raw)
In-Reply-To: <20080525173942.GA16793@dmt>
Marcelo Tosatti wrote:
> 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.
>
Linux seems to mask the high bits properly, yes. Hopefully other OSes
do too.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2008-05-26 8:23 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-24 23:43 [patch 0/4] C2 "emulation" Marcelo Tosatti
2008-05-24 23:43 ` [patch 1/4] QEMU/KVM: self-disabling C2 emulation Marcelo Tosatti
2008-05-24 23:43 ` [patch 2/4] libkvm: KVM_GET_PMTIMER ioctl support Marcelo Tosatti
2008-05-24 23:43 ` [patch 3/4] QEMU/KVM: non-virtualized ACPI PMTimer support Marcelo Tosatti
2008-05-25 10:18 ` Avi Kivity
2008-05-25 16:32 ` Marcelo Tosatti
2008-05-26 8:16 ` Avi Kivity
2008-05-29 17:56 ` Marcelo Tosatti
2008-05-31 7:52 ` Avi Kivity
2008-05-25 10:19 ` Avi Kivity
2008-05-25 17:39 ` Marcelo Tosatti
2008-05-26 8:23 ` Avi Kivity [this message]
2008-05-24 23:43 ` [patch 4/4] KVM: allow direct access to PMTimer port Marcelo Tosatti
2008-05-25 10:04 ` Avi Kivity
2008-05-25 16:09 ` Marcelo Tosatti
2008-05-25 12:31 ` Avi Kivity
2008-05-25 16:12 ` Marcelo Tosatti
2008-05-26 8:03 ` Avi Kivity
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