From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: xen-devel@lists.xensource.com
Subject: Re: [Qemu-devel] [PATCH 1/4] xen: introduce mc146818rtcxen
Date: Mon, 21 Nov 2011 14:21:14 +0100 [thread overview]
Message-ID: <jadj8a$m4q$1@dough.gmane.org> (raw)
In-Reply-To: <4EC671AF.5030805@codemonkey.ws>
On 11/18/2011 03:54 PM, Anthony Liguori wrote:
>
> The Right Solution would be to modify the RTC emulation such that it did
> a qemu_get_clock() during read of the CMOS registers in order to ensure
> the time was up to date (instead of using 1 second timers).
True, but you also have to handle UIP and the UF/AF interrupts.
Basically you have to track the various pieces of state and trigger a
timer when the routine would do something interesting. It's not hard,
but it's also a decent amount of programming.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: xen-devel@lists.xensource.com
Subject: Re: [PATCH 1/4] xen: introduce mc146818rtcxen
Date: Mon, 21 Nov 2011 14:21:14 +0100 [thread overview]
Message-ID: <jadj8a$m4q$1@dough.gmane.org> (raw)
In-Reply-To: <4EC671AF.5030805@codemonkey.ws>
On 11/18/2011 03:54 PM, Anthony Liguori wrote:
>
> The Right Solution would be to modify the RTC emulation such that it did
> a qemu_get_clock() during read of the CMOS registers in order to ensure
> the time was up to date (instead of using 1 second timers).
True, but you also have to handle UIP and the UF/AF interrupts.
Basically you have to track the various pieces of state and trigger a
timer when the routine would do something interesting. It's not hard,
but it's also a decent amount of programming.
Paolo
next prev parent reply other threads:[~2011-11-21 13:21 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-15 14:48 [Qemu-devel] [PATCH 0/4] prevent Qemu from waking up needlessly Stefano Stabellini
2011-11-15 14:48 ` Stefano Stabellini
2011-11-15 14:51 ` [Qemu-devel] [PATCH 1/4] xen: introduce mc146818rtcxen stefano.stabellini
2011-11-15 14:51 ` stefano.stabellini
2011-11-15 14:54 ` [Qemu-devel] " Anthony Liguori
2011-11-15 14:54 ` Anthony Liguori
2011-11-15 16:57 ` [Qemu-devel] " Stefano Stabellini
2011-11-18 11:46 ` Stefano Stabellini
2011-11-18 11:46 ` Stefano Stabellini
2011-11-18 13:58 ` [Qemu-devel] " Anthony Liguori
2011-11-18 13:58 ` Anthony Liguori
2011-11-18 14:54 ` [Qemu-devel] " Anthony Liguori
2011-11-18 14:54 ` Anthony Liguori
2011-11-20 14:53 ` [Qemu-devel] " Avi Kivity
2011-11-20 14:53 ` Avi Kivity
2011-11-21 20:49 ` [Qemu-devel] " Anthony Liguori
2011-11-21 20:49 ` Anthony Liguori
2011-11-21 11:05 ` [Qemu-devel] " Stefano Stabellini
2011-11-21 11:05 ` Stefano Stabellini
2011-11-21 13:21 ` Paolo Bonzini [this message]
2011-11-21 13:21 ` Paolo Bonzini
2011-11-15 14:51 ` [Qemu-devel] [PATCH 2/4] xen: do not initialize the interval timer emulator stefano.stabellini
2011-11-15 14:51 ` stefano.stabellini
2011-11-15 14:51 ` [Qemu-devel] [PATCH 3/4] xen: introduce an event channel for buffered io event notifications stefano.stabellini
2011-11-15 14:51 ` stefano.stabellini
2011-11-15 17:13 ` [Qemu-devel] [Xen-devel] " Ian Campbell
2011-11-15 17:13 ` Ian Campbell
2011-11-15 17:20 ` [Qemu-devel] " Stefano Stabellini
2011-11-15 17:20 ` Stefano Stabellini
2011-11-15 17:24 ` [Qemu-devel] " Ian Campbell
2011-11-15 17:24 ` Ian Campbell
2011-11-15 14:51 ` [Qemu-devel] [PATCH 4/4] qemu_calculate_timeout: increase minimum timeout to 1h stefano.stabellini
2011-11-15 14:51 ` stefano.stabellini
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