From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: Luca Tettamanti <kronos.it-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
qemu-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org
Subject: Re: [PATCH] Add support for HPET periodic timer.
Date: Mon, 13 Aug 2007 11:04:46 +0300 [thread overview]
Message-ID: <46C0109E.3090800@qumranet.com> (raw)
In-Reply-To: <11867779422209-git-send-email-kronos.it-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Luca Tettamanti wrote:
> Linux operates the HPET timer in legacy replacement mode, which means that the
> periodic interrupt of the CMOS RTC is not delivered (qemu won't be able to use
> /dev/rtc). Add support for HPET (/dev/hpet) as a replacement for the RTC; the
> periodic interrupt is delivered via SIGIO and is handled in the same way as the
> RTC timer.
> HPET must be explicitly enabled with -use-hpet.
>
>
Are there any downsides to using HPET? If not, I suggest making it the
default, in order to reduce complexity for the user.
Something like:
- try to use HPET (unless -no-rtc selected)
- try to use RTC (unless -no-rtc selected)
- fallback to normal unix facilities
--
error compiling committee.c: too many arguments to function
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WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi@qumranet.com>
To: Luca Tettamanti <kronos.it@gmail.com>
Cc: kvm-devel@lists.sourceforge.net, qemu-devel@nongnu.org
Subject: [Qemu-devel] Re: [kvm-devel] [PATCH] Add support for HPET periodic timer.
Date: Mon, 13 Aug 2007 11:04:46 +0300 [thread overview]
Message-ID: <46C0109E.3090800@qumranet.com> (raw)
In-Reply-To: <11867779422209-git-send-email-kronos.it@gmail.com>
Luca Tettamanti wrote:
> Linux operates the HPET timer in legacy replacement mode, which means that the
> periodic interrupt of the CMOS RTC is not delivered (qemu won't be able to use
> /dev/rtc). Add support for HPET (/dev/hpet) as a replacement for the RTC; the
> periodic interrupt is delivered via SIGIO and is handled in the same way as the
> RTC timer.
> HPET must be explicitly enabled with -use-hpet.
>
>
Are there any downsides to using HPET? If not, I suggest making it the
default, in order to reduce complexity for the user.
Something like:
- try to use HPET (unless -no-rtc selected)
- try to use RTC (unless -no-rtc selected)
- fallback to normal unix facilities
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2007-08-13 8:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-10 20:32 [PATCH] Add support for HPET periodic timer Luca Tettamanti
2007-08-10 20:32 ` [Qemu-devel] " Luca Tettamanti
[not found] ` <11867779422209-git-send-email-kronos.it-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2007-08-13 8:04 ` Avi Kivity [this message]
2007-08-13 8:04 ` [Qemu-devel] Re: [kvm-devel] " Avi Kivity
[not found] ` <46C0109E.3090800-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-08-13 11:50 ` Daniel P. Berrange
2007-08-13 11:50 ` [Qemu-devel] Re: [kvm-devel] " Daniel P. Berrange
[not found] ` <20070813115030.GB14348-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2007-08-13 17:03 ` Luca
2007-08-13 17:03 ` [Qemu-devel] Re: [kvm-devel] " Luca
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