Xen devel - Jan 2011 - [PATCH] libxl: implement trigger s3resume

Implement trigger s3resume

This is the equivalent of xm trigger s3resume and it is implemented the
same way: using an ACPI state change.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

diff -r 1ae74f060a39 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c	Mon Jan 10 10:37:53 2011 +0000
+++ b/tools/libxl/libxl.c	Mon Jan 10 10:58:50 2011 +0000
@@ -2668,8 +2668,14 @@ static int trigger_type_from_string(char
 int libxl_send_trigger(libxl_ctx *ctx, uint32_t domid, char *trigger_name,
uint32_t vcpuid)
 {
     int rc = -1;
-    int trigger_type = trigger_type_from_string(trigger_name);
-
+    int trigger_type = -1;
+
+    if (!strcmp(trigger_name, "s3resume")) {
+        xc_set_hvm_param(ctx->xch, domid, HVM_PARAM_ACPI_S_STATE, 0);
+        return 0;
+    }
+
+    trigger_type = trigger_type_from_string(trigger_name);
     if (trigger_type == -1) {
         LIBXL__LOG_ERRNOVAL(ctx, LIBXL__LOG_ERROR, -1,
             "Invalid trigger, valid triggers are
<nmi|reset|init|power|sleep>");

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Stefano Stabellini writes ("[Xen-devel] [PATCH] libxl: implement trigger
s3resume"):
> Implement trigger s3resume
> 
> This is the equivalent of xm trigger s3resume and it is implemented the
> same way: using an ACPI state change.
The code here is a bit odd - callers are apparently expected to pass
strings rather than enums through into the libxl API.  I think
trigger_type_from_string ought to be libxlu_...

But given the current code and the state of freeze we shouldn''t do
that now.

This is clearly a low-impact new feature and I''m inclined to make
exception to the freeze for it.  Have you tested the patch ?  Anyone
object ?

Thanks,
Ian.

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On Tue, 11 Jan 2011, Ian Jackson wrote:
> Stefano Stabellini writes ("[Xen-devel] [PATCH] libxl: implement
trigger s3resume"):
> > Implement trigger s3resume
> > 
> > This is the equivalent of xm trigger s3resume and it is implemented
the
> > same way: using an ACPI state change.
> 
> The code here is a bit odd - callers are apparently expected to pass
> strings rather than enums through into the libxl API.  I think
> trigger_type_from_string ought to be libxlu_...
> 
> But given the current code and the state of freeze we shouldn''t do
> that now.
> 
> This is clearly a low-impact new feature and I''m inclined to make
> exception to the freeze for it.  Have you tested the patch ?  Anyone
> object ?
I forgot to reply to this, but yes I tested it.

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Stefano Stabellini writes ("Re: [Xen-devel] [PATCH] libxl: implement
trigger s3resume"):
> I forgot to reply to this, but yes I tested it.
I''ve applied the patch, thanks.

Ian.

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