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From: Bhupinder Thakur <bhupinder.thakur@linaro.org>
To: Stefano Stabellini <sstabellini@kernel.org>
Cc: Wei Liu <wei.liu2@citrix.com>,
	Steve Capper <Steve.Capper@arm.com>,
	George Dunlap <george.dunlap@eu.citrix.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Ian Jackson <Ian.Jackson@eu.citrix.com>,
	Xen Devel <xen-devel@lists.xen.org>,
	Julien Grall <julien.grall@arm.com>,
	Jan Beulich <JBeulich@suse.com>,
	Christoffer Dall <christoffer.dall@linaro.org>
Subject: Re: Xen ARM - Exposing a PL011 to the guest
Date: Tue, 10 Jan 2017 17:09:49 +0530	[thread overview]
Message-ID: <CACtJ1JQQ_Yce=chgM6r2eGdTcWGE5ddSHCu7TDvcZeQjD3_WyQ@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.10.1701061333100.2866@sstabellini-ThinkPad-X260>

Hi Stefano,



On 7 January 2017 at 03:24, Stefano Stabellini <sstabellini@kernel.org> wrote:
> Hello Bhupinder,
>
> it is good to hear that you are making progress.
>
>
> On Fri, 6 Jan 2017, Bhupinder Thakur wrote:
>> Hi,
>>
>> I am trying to allocate a new SPI VIRQ for sending pl011 interrupt to
>> the guest OS. Currently Xen does not allow to allocate a SPI VIRQ for
>> a guest domain. I tried allocating a new SPI VIRQ by calling
>> vgic_allocate_spi() but it failed as the SPI VIRQ range for the guests
>> is limited to 0 (vgic_num_irqs() return 32 and therefore in effect
>> says that no SPI VIRQ can be allocated because below 32 are for
>> PPI/SGI VIRQs).
>
> Yes, you should use vgic_allocate_virq. For that to work, you need to
> make sure that nr_spis for the domain is > 0. Given that nr_spis is
> passed from libxl by calling xc_domain_create, I would set nr_spis to 1
> in libxl__arch_domain_prepare_config.
>
I increment the nr_spis by 1 in domain_vgic_init() to ensure the
vgic_allocate_virq() is able to allocate a SPI for pl011. With that
change, I am able to inject a SPI irq into guest and handle it.

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  reply	other threads:[~2017-01-10 11:39 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-30 15:29 Xen ARM - Exposing a PL011 to the guest Julien Grall
2016-11-30 16:24 ` Christoffer Dall
2016-12-01 15:51   ` Julien Grall
2016-11-30 17:02 ` Volodymyr Babchuk
2016-11-30 22:26 ` Stefano Stabellini
2016-12-01 10:26   ` Christoffer Dall
2016-12-01 21:55     ` Stefano Stabellini
2016-12-16 10:06       ` Bhupinder Thakur
2016-12-16 17:03         ` Julien Grall
2016-12-19 12:20           ` Christoffer Dall
2016-12-19 20:24             ` Stefano Stabellini
2016-12-20  9:46               ` Bhupinder Thakur
2016-12-20 22:29                 ` Stefano Stabellini
2016-12-20 12:32               ` Julien Grall
2016-12-20 19:53                 ` Stefano Stabellini
2016-12-20 20:26                   ` Stefano Stabellini
2016-12-21 19:19                   ` Julien Grall
2016-12-21 22:12                     ` Stefano Stabellini
2016-12-28 17:49                       ` Julien Grall
2016-12-28 17:52                         ` Julien Grall
2016-12-29  9:17                         ` Bhupinder Thakur
2017-01-03 20:08                           ` Stefano Stabellini
2017-01-06 10:18                             ` Bhupinder Thakur
2017-01-06 21:54                               ` Stefano Stabellini
2017-01-10 11:39                                 ` Bhupinder Thakur [this message]
2017-01-11  0:22                                   ` Stefano Stabellini
2017-01-17 14:01                                 ` Julien Grall
2017-01-17 13:31                             ` Julien Grall
2017-01-17 19:27                               ` Stefano Stabellini
2017-01-27 12:14                                 ` Bhupinder Thakur
2017-01-27 19:13                                   ` Stefano Stabellini
2017-01-29 11:06                                   ` Christoffer Dall
2017-02-03 13:53                                     ` Bhupinder Thakur
2017-02-03 14:08                                       ` Julien Grall
2017-02-08 12:39                                         ` Bhupinder Thakur
2017-02-09  0:10                                           ` Stefano Stabellini
2017-02-13  8:50                                             ` Bhupinder Thakur
2017-02-13 21:44                                               ` Stefano Stabellini
2017-02-15  8:15                                                 ` Bhupinder Thakur
2017-02-15  8:24                                                   ` Bhupinder Thakur
2017-02-15 21:21                                                     ` Stefano Stabellini
2017-02-23 13:15                                                       ` Bhupinder Thakur
2017-02-23 15:00                                                         ` Wei Liu
2017-02-03 14:15                                       ` Christoffer Dall
2017-01-03 19:38                         ` Stefano Stabellini
2016-12-20 12:47               ` Christoffer Dall
2016-12-20 21:33                 ` Stefano Stabellini
2016-12-21 11:55                   ` Christoffer Dall
2016-12-21 20:32                   ` Julien Grall

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