linux-kernel - Re: [Xen-devel] [PATCH 5/8] ACPI: add processor driver for Xen virtual CPUs.

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Date:	Mon, 12 Dec 2011 12:29:41 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Jan Beulich <JBeulich@...e.com>, liang tang <liang.tang@...cle.com>
Cc:	ke.yu@...el.com, kevin.tian@...el.com, stefan.bader@...onical.com,
	Ian.Campbell@...rix.com, mike.mcclurg@...rix.com, jeremy@...p.org,
	konrad@...nel.org, lenb@...nel.org, xen-devel@...ts.xensource.com,
	liang.tang@...cle.com, rjw@...k.pl, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [Xen-devel] [PATCH 5/8] ACPI: add processor driver for Xen
 virtual CPUs.

On Thu, Dec 01, 2011 at 09:24:23AM +0000, Jan Beulich wrote:
> >>> On 30.11.11 at 18:21, Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> wrote:
> > --- a/drivers/acpi/Makefile
> > +++ b/drivers/acpi/Makefile
> > @@ -66,6 +66,7 @@ obj-$(CONFIG_ACPI_CUSTOM_METHOD)+= custom_method.o
> >  # processor has its own "processor." module_param namespace
> >  processor-y			:= processor_driver.o processor_throttling.o
> >  processor-y			+= processor_idle.o processor_thermal.o
> > +processor-y			+= processor_xen.o
> 
> This should minimally be processor-$(CONFIG_XEN), with other things
> adjusted as necessary.

I was under the impression that this was required to get the processor_xen.ko
to be a module. Otherwise it would only compile as built-in.

Liang, can you chime in please?

> 
> >  processor-$(CONFIG_CPU_FREQ)	+= processor_perflib.o
> >  
> >  obj-$(CONFIG_ACPI_PROCESSOR_AGGREGATOR) += acpi_pad.o
> >...
> > --- a/drivers/xen/Kconfig
> > +++ b/drivers/xen/Kconfig
> > @@ -117,6 +117,11 @@ config XEN_SYS_HYPERVISOR
> >  	 virtual environment, /sys/hypervisor will still be present,
> >  	 but will have no xen contents.
> >  
> > +config ACPI_PROCESSOR_XEN
> > +	tristate
> > +	depends on XEN_DOM0 && ACPI_PROCESSOR && CPU_FREQ
> > +	default m
> 
> default ACPI_PROCESSOR
> 
> > +
> >  config XEN_XENBUS_FRONTEND
> >  	tristate
> >  
> > diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile
> > index 974fffd..f67450c 100644
> > --- a/drivers/xen/Makefile
> > +++ b/drivers/xen/Makefile
> > @@ -19,6 +19,9 @@ obj-$(CONFIG_XEN_TMEM)			+= tmem.o
> >  obj-$(CONFIG_SWIOTLB_XEN)		+= swiotlb-xen.o
> >  obj-$(CONFIG_XEN_DOM0)			+= pci.o
> >  obj-$(CONFIG_XEN_PCIDEV_BACKEND)	+= xen-pciback/
> > +ifdef CONFIG_ACPI_PROCESSOR_XEN
> > +obj-$(CONFIG_ACPI_PROCESSOR)		+= acpi_processor.o
> > +endif
> 
> obj-$(CONFIG_ACPI_PPROCESSOR_XEN)
> 
> Jan
> 
> --
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