From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"Yaozu (Eddie) Dong" <eddie.dong@intel.com>,
"ddutile@redhat.com" <ddutile@redhat.com>,
"sheng@linux.intel.com" <sheng@linux.intel.com>
Subject: Re: [Xen-devel] [PATCH 02/12] early PV on HVM
Date: Tue, 08 Jun 2010 09:09:35 -0700 [thread overview]
Message-ID: <4C0E6B3F.3080404@goop.org> (raw)
In-Reply-To: <20100608134637.GA5998@phenom.dumpdata.com>
On 06/08/2010 06:46 AM, Konrad Rzeszutek Wilk wrote:
>>>> + per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0];
>>>>
>>>
> So.. what is the purpose of the per_cpu(xen_vcpu, 0) then?
>
We still need the percpu info for things like time, but it is mapped out
of the platform device rather than placed at any address we want in
kernel memory (vcpu info placement), where we can access it directly as
a percpu variable. This is only really relevent for the implementation
of the interrupt enable/disable pvops, so it doesn't matter for hvm.
J
next prev parent reply other threads:[~2010-06-08 16:09 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-03 13:10 [PATCH 01/12] Add support for hvm_op stefano.stabellini
2010-06-03 13:10 ` [PATCH 02/12] early PV on HVM stefano.stabellini
2010-06-04 20:20 ` [Xen-devel] " Konrad Rzeszutek Wilk
2010-06-07 14:38 ` Stefano Stabellini
2010-06-08 13:46 ` Konrad Rzeszutek Wilk
2010-06-08 15:55 ` Stefano Stabellini
2010-06-08 16:12 ` Konrad Rzeszutek Wilk
2010-06-08 16:25 ` Stefano Stabellini
2010-06-08 19:05 ` Konrad Rzeszutek Wilk
2010-06-10 13:36 ` Stefano Stabellini
2010-06-08 16:09 ` Jeremy Fitzhardinge [this message]
2010-06-04 20:23 ` Konrad Rzeszutek Wilk
2010-06-07 14:39 ` Stefano Stabellini
2010-06-03 13:10 ` [PATCH 03/12] evtchn delivery " stefano.stabellini
2010-06-14 21:20 ` [Xen-devel] " Konrad Rzeszutek Wilk
2010-06-17 15:41 ` Stefano Stabellini
2010-06-17 17:38 ` Konrad Rzeszutek Wilk
2010-06-17 17:40 ` Stefano Stabellini
2010-06-03 13:10 ` [PATCH 04/12] Xen PCI platform device driver stefano.stabellini
2010-06-03 13:10 ` [PATCH 05/12] Add suspend\resume support for PV on HVM guests stefano.stabellini
2010-06-14 21:20 ` [Xen-devel] " Konrad Rzeszutek Wilk
2010-06-17 15:42 ` Stefano Stabellini
2010-06-03 13:10 ` [PATCH 06/12] Allow xen platform pci device to be compiled as a module stefano.stabellini
2010-06-14 21:20 ` [Xen-devel] " Konrad Rzeszutek Wilk
2010-06-15 16:22 ` Jeremy Fitzhardinge
2010-06-17 15:42 ` Stefano Stabellini
2010-06-03 13:10 ` [PATCH 07/12] Fix find_unbound_irq in presence of ioapic irqs stefano.stabellini
2010-06-03 13:10 ` [PATCH 08/12] Fix possible NULL pointer dereference in print_IO_APIC stefano.stabellini
2010-06-03 13:10 ` [PATCH 09/12] __setup_vector_irq: handle NULL chip_data stefano.stabellini
2010-06-03 13:10 ` [PATCH 10/12] Do not try to disable hpet if it hasn't been initialized before stefano.stabellini
2010-06-03 13:10 ` [PATCH 11/12] Use xen_vcpuop_clockevent, xen_clocksource and xen wallclock stefano.stabellini
2010-06-03 13:10 ` [PATCH 12/12] Unplug emulated disks and nics stefano.stabellini
2010-06-14 21:20 ` [Xen-devel] " Konrad Rzeszutek Wilk
2010-06-17 15:42 ` Stefano Stabellini
2010-06-17 17:46 ` Konrad Rzeszutek Wilk
2010-06-17 18:00 ` Stefano Stabellini
2010-06-17 23:35 ` Jeremy Fitzhardinge
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