From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anthony Liguori <anthony@codemonkey.ws>
Subject: Re: [PATCH V9 16/16] acpi-piix4: Add Xen hypercall for
	sleep state.
Date: Wed, 26 Jan 2011 17:11:38 -0600
Message-ID: <4D40AA2A.6010207@codemonkey.ws>
References: <1295965760-31508-1-git-send-email-anthony.perard@citrix.com>
	<1295965760-31508-17-git-send-email-anthony.perard@citrix.com>
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Cc: Xen Devel <xen-devel@lists.xensource.com>, QEMU-devel <qemu-devel@nongnu.org>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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On 01/25/2011 08:29 AM, anthony.perard@citrix.com wrote:
> From: Anthony PERARD<anthony.perard@citrix.com>
>
> Signed-off-by: Anthony PERARD<anthony.perard@citrix.com>
> ---
>   hw/acpi_piix4.c |    4 ++++
>   hw/xen.h        |    2 ++
>   xen-all.c       |    7 +++++++
>   xen-stub.c      |    4 ++++
>   4 files changed, 17 insertions(+), 0 deletions(-)
>
> diff --git a/hw/acpi_piix4.c b/hw/acpi_piix4.c
> index 5bbc2b5..ea94bf9 100644
> --- a/hw/acpi_piix4.c
> +++ b/hw/acpi_piix4.c
> @@ -23,6 +23,7 @@
>   #include "acpi.h"
>   #include "sysemu.h"
>   #include "range.h"
> +#include "xen.h"
>
>   //#define DEBUG
>
> @@ -181,6 +182,9 @@ static void pm_ioport_write(IORange *ioport, uint64_t addr, unsigned width,
>                       if (s->cmos_s3) {
>                           qemu_irq_raise(s->cmos_s3);
>                       }
> +                    if (xen_enabled()) {
> +                        xen_set_hvm_sleep_state();
> +                    }
>    

Can't you hook into cmos_s3?

Regards,

Anthony Liguori