[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 1/2] Xen acpi pad implement
Konrad Rzeszutek Wilk wrote: >>> From f514b97628945cfac00efb0d456f133d44754c9d Mon Sep 17 00:00:00 >>> 2001 >> From: Liu, Jinsong <jinsong.liu@xxxxxxxxx> >> Date: Thu, 1 Nov 2012 21:02:36 +0800 >> Subject: [PATCH 1/2] Xen acpi pad implement >> >> PAD is acpi Processor Aggregator Device which provides a control >> point >> that enables the platform to perform specific processor configuration >> and control that applies to all processors in the platform. >> >> This patch is to implement Xen acpi pad logic. When running under Xen >> virt platform, native pad driver would not work. Instead Xen pad >> driver, >> a self-contained and very thin logic level, would take over acpi pad >> staff. When acpi pad notify OSPM, xen pad logic intercept and parse >> _PUR object >> and then hypercall to hyervisor for the rest work, say, core parking. > > Two comments: > - Did you look at the SuSE tree? Jan mentioned that they did some > fixes? Did you carry them over? I didn't look at Suse tree. Jan, would you please tell me where can I pull Suse tree? have you implemented xen-acpi-pad logic at Suse dom0 and which points you have fixed? > - The init function should not make hypercalls before checking if it > in facts run under Xen. OK. >> + >> +static const struct acpi_device_id pad_device_ids[] = { >> + {"ACPI000C", 0}, + {"", 0}, >> +}; >> + >> +static struct acpi_driver xen_acpi_pad_driver = { >> + .name = "processor_aggregator", >> + .class = ACPI_PROCESSOR_AGGREGATOR_CLASS, >> + .ids = pad_device_ids, >> + .ops = { >> + .add = xen_acpi_pad_add, >> + .remove = xen_acpi_pad_remove, >> + }, >> +}; >> + >> +static int __init xen_acpi_pad_init(void) >> +{ >> + int ret = -ENOSYS; >> + unsigned int version = HYPERVISOR_xen_version(XENVER_version, >> NULL); > > Heh. so if you run this on baremetal I wonder what will happen. > >> + unsigned int major = version >> 16; >> + unsigned int minor = version & 0xffff; >> + >> + /* Only DOM0 is responsible for Xen acpi pad */ >> + if (!xen_initial_domain()) >> + return -ENODEV; >> + > > I think the check for version should happen here. Got it, will update later. Thanks, Jinsong _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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