From: Keir Fraser <keir.xen@gmail.com>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: "Keir (Xen.org)" <keir@xen.org>,
Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>,
"Tim (Xen.org)" <tim@xen.org>,
xen-devel <xen-devel@lists.xen.org>,
Julien Grall <julien.grall@citrix.com>,
Jan Beulich <JBeulich@suse.com>
Subject: Re: [PATCH v3 03/13] xen: introduce cpumask_from_bitmap
Date: Thu, 25 Apr 2013 16:13:49 +0100 [thread overview]
Message-ID: <CD9F06BD.22FC6%keir.xen@gmail.com> (raw)
In-Reply-To: <1366901504.20256.558.camel@zakaz.uk.xensource.com>
On 25/04/2013 15:51, "Ian Campbell" <Ian.Campbell@citrix.com> wrote:
> On Thu, 2013-04-25 at 15:44 +0100, Ian Campbell wrote:
>> On Thu, 2013-04-25 at 15:42 +0100, Ian Campbell wrote:
>>> And it really wants to act on sets of real physical cpus (hence cpumask_t)?
>>
>> Actually, vcpus. Perhaps cpumask_t is the wrong datatype then?
>
> x86 defines for_each_set_bit in terms of find_first_bit and
> find_next_bit (both of which we have on ARM). Seems like we should just
> carry that over?
Yup, seems a shame to duplicate it into asm-arm, but I can live with it. I
can imagine some arch wanting a specialised version of it sometime.
Certainly using cpumask_t for vcpus is very obviously wrong!
-- Keir
>>> It's emulating a write to a GICD (read: APIC ;-)) register which causes
>>> an SGI (read: IPI) to be sent. The value you write includes an 8 bit
>>> mask indicating the target processors.
>>>
>>> See "[PATCH v3 04/13] xen/arm: support for guest SGI" in this series.
>>>
>>> Ian
>>
>>
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xen.org
>> http://lists.xen.org/xen-devel
>
>
next prev parent reply other threads:[~2013-04-25 15:13 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-24 19:06 [PATCH v3 0/13] xen/arm: guest SMP support Stefano Stabellini
2013-04-24 19:07 ` [PATCH v3 01/13] xen/arm: basic PSCI support, implement cpu_on and cpu_off Stefano Stabellini
2013-04-25 9:53 ` Ian Campbell
2013-04-25 10:57 ` Stefano Stabellini
2013-04-25 11:31 ` Ian Campbell
2013-04-24 19:07 ` [PATCH v3 02/13] xen/arm: allocate secondaries dom0 vcpus Stefano Stabellini
2013-04-25 10:08 ` Ian Campbell
2013-04-26 13:23 ` Stefano Stabellini
2013-04-26 13:25 ` Ian Campbell
2013-04-24 19:07 ` [PATCH v3 03/13] xen: introduce cpumask_from_bitmap Stefano Stabellini
2013-04-25 9:24 ` Jan Beulich
2013-04-25 10:01 ` Ian Campbell
2013-04-25 14:26 ` Keir Fraser
2013-04-25 14:42 ` Ian Campbell
2013-04-25 14:44 ` Ian Campbell
2013-04-25 14:51 ` Ian Campbell
2013-04-25 15:13 ` Keir Fraser [this message]
2013-04-25 15:23 ` Ian Campbell
2013-04-25 17:20 ` Keir Fraser
2013-04-25 15:08 ` Stefano Stabellini
2013-04-25 15:17 ` Keir Fraser
2013-04-25 15:18 ` Jan Beulich
2013-04-25 15:17 ` Jan Beulich
2013-04-25 10:01 ` Stefano Stabellini
2013-04-25 10:08 ` Jan Beulich
2013-04-25 10:35 ` Stefano Stabellini
2013-04-25 10:49 ` Jan Beulich
2013-04-25 11:38 ` Stefano Stabellini
2013-04-25 12:49 ` Jan Beulich
2013-04-25 14:27 ` Keir Fraser
2013-04-24 19:07 ` [PATCH v3 04/13] xen/arm: support for guest SGI Stefano Stabellini
2013-04-25 10:16 ` Ian Campbell
2013-04-25 19:03 ` Julien Grall
2013-04-26 9:05 ` Ian Campbell
2013-04-26 11:46 ` Julien Grall
2013-04-26 12:12 ` Sander Bogaert
2013-04-26 13:07 ` Stefano Stabellini
2013-04-26 13:24 ` Ian Campbell
2013-04-26 13:35 ` Julien Grall
2013-04-26 13:56 ` Sander Bogaert
2013-04-26 14:10 ` Ian Campbell
2013-04-26 13:28 ` Julien Grall
2013-04-24 19:07 ` [PATCH v3 05/13] xen/arm: early_ioremap: allocate virtual addresses from top to bottom Stefano Stabellini
2013-04-25 10:27 ` Ian Campbell
2013-04-24 19:07 ` [PATCH v3 06/13] xen/arm: implement arch_vmap_virt_end Stefano Stabellini
2013-04-25 10:29 ` Ian Campbell
2013-04-24 19:07 ` [PATCH v3 07/13] xen/arm: compile and initialize vmap Stefano Stabellini
2013-04-25 10:41 ` Ian Campbell
2013-04-25 17:04 ` Stefano Stabellini
2013-04-26 9:00 ` Ian Campbell
2013-04-26 12:02 ` Stefano Stabellini
2013-04-26 13:21 ` Ian Campbell
2013-04-24 19:07 ` [PATCH v3 08/13] xen/arm: implement map_domain_page_global and unmap_domain_page_global Stefano Stabellini
2013-04-25 10:43 ` Ian Campbell
2013-04-24 19:07 ` [PATCH v3 09/13] xen: move VCPUOP_register_vcpu_info to common code Stefano Stabellini
2013-04-25 10:45 ` Ian Campbell
2013-04-24 19:07 ` [PATCH v3 10/13] xen/arm: support VCPUOP_register_vcpu_info Stefano Stabellini
2013-04-25 10:50 ` Ian Campbell
2013-04-25 11:38 ` Stefano Stabellini
2013-04-25 11:40 ` Ian Campbell
2013-04-25 11:41 ` Stefano Stabellini
2013-04-25 14:29 ` Keir Fraser
2013-04-25 14:39 ` Ian Campbell
2013-04-24 19:07 ` [PATCH v3 11/13] xen/arm: send IPIs to inject irqs into guest vcpus running on different pcpus Stefano Stabellini
2013-04-25 11:00 ` Ian Campbell
2013-04-26 13:39 ` Stefano Stabellini
2013-04-26 14:08 ` Ian Campbell
2013-04-24 19:07 ` [PATCH v3 12/13] xen/arm: start the vtimer Xen timers on the processor they should be running on Stefano Stabellini
2013-04-25 11:03 ` Ian Campbell
2013-04-26 14:30 ` Stefano Stabellini
2013-04-26 14:35 ` Ian Campbell
2013-04-26 14:36 ` Stefano Stabellini
2013-04-24 19:07 ` [PATCH v3 13/13] xen/arm: initialize virt_timer and phys_timer with the same values on all vcpus Stefano Stabellini
2013-04-25 11:21 ` Ian Campbell
2013-04-26 14:30 ` Stefano Stabellini
2013-04-26 14:37 ` Ian Campbell
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