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Re: [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer.
From: |
Matthew Kent |
Subject: |
Re: [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer. |
Date: |
Tue, 21 Aug 2007 12:24:05 -0700 |
On Sat, 2007-18-08 at 01:11 +0200, Luca Tettamanti wrote:
> plain text document attachment (clock-hpet)
> 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.
>
> Signed-off-by: Luca Tettamanti <address@hidden>
I must be missing something silly here.. should I be able to open more
than one instance of qemu with -clock hpet? Because upon invoking a
second instance of qemu HPET_IE_ON fails.
I also tried running the example in the kernel docs under
Documentation/hpet.txt
address@hidden [/home/mkent]# ./demo poll /dev/hpet 1 1000
-hpet: executing poll
hpet_poll: info.hi_flags 0x0
hpet_poll: expired time = 0x8
hpet_poll: revents = 0x1
hpet_poll: data 0x1
<in another term>
address@hidden [/home/mkent]# ./demo poll /dev/hpet 1 1000
-hpet: executing poll
hpet_poll: info.hi_flags 0x0
hpet_poll, HPET_IE_ON failed
This is on 2.6.23-rc3 x86_64 with the patch-2.6.23-rc3-hrt2.patch
hrtimers patch.
--
Matthew Kent <address@hidden>
http://magoazul.com
- [Qemu-devel] [PATCH 0/4] Rework alarm timer infrastrucure - take 2, Luca Tettamanti, 2007/08/17
- [Qemu-devel] [PATCH 1/4] Rework alarm timer infrastrucure., Luca Tettamanti, 2007/08/17
- [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer., Luca Tettamanti, 2007/08/17
- Re: [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer.,
Matthew Kent <=
- Re: [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer., Luca, 2007/08/21
- Re: [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer., Matthew Kent, 2007/08/21
- Re: [kvm-devel] [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer., Dan Kenigsberg, 2007/08/22
- Re: [kvm-devel] [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer., Avi Kivity, 2007/08/22
- Re: [kvm-devel] [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer., Andi Kleen, 2007/08/22
- Re: [kvm-devel] [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer., Dan Kenigsberg, 2007/08/22
- Re: [kvm-devel] [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer., Andi Kleen, 2007/08/22
- Re: [kvm-devel] [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer., Dan Kenigsberg, 2007/08/23
- Re: [kvm-devel] [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer., Luca, 2007/08/24
- Re: [kvm-devel] [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer., Dan Kenigsberg, 2007/08/25