From: Julien Grall <julien.grall@linaro.org>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: xen-devel@lists.xenproject.org,
Daniel De Graaf <dgdegra@tycho.nsa.gov>,
tim@xen.org, stefano.stabellini@citrix.com
Subject: Re: [RFC 09/14] xen/xsm: flask: MSI is PCI specific
Date: Mon, 17 Mar 2014 12:05:25 +0000 [thread overview]
Message-ID: <5326E505.3050507@linaro.org> (raw)
In-Reply-To: <1395051239.4122.39.camel@kazak.uk.xensource.com>
Hi Ian,
On 03/17/2014 10:13 AM, Ian Campbell wrote:
> On Fri, 2014-03-14 at 18:15 +0000, Julien Grall wrote:
>> Hi Ian,
>>
>> On 03/14/2014 05:25 PM, Ian Campbell wrote:
>>> On Thu, 2014-03-13 at 14:40 +0000, Julien Grall wrote:
>>>>
>>>> Right, nr_static_irqs is set to 1024 on ARM. For now every IRQs, are not
>>>> higher than this number.
>>>
>>> This will change before long though. Would HAVE_MSI_IRQS be a better
>>> name for this particular arch-configurable? After all PCI without MSI is
>>> plausible isn't it? (well, maybe not in the modern world)
>>
>> Most of PCI passthrough code is relying that MSI is also implemented.
>> Futhermore, I think the plan for ARM is to support both PCI and MSI.
>
> Right, but we might get PCI support first and separately I think?
Good question, I though it's better to come with PCI and MSI support at
the time.
>> That's why I chose HAS_PCI.
>
> I suppose we can revisit it easily enough if it causes problems.
If we implement first PCI, we might need to modify a couple of other
place in Xen. I think we can delay HAS_MSI_IRQS and see if we really
need it.
Regards,
--
Julien Grall
next prev parent reply other threads:[~2014-03-17 12:05 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-12 16:15 [RFC 00/14] xen/arm: Add support for XSM Julien Grall
2014-03-12 16:15 ` [RFC 01/14] xen/arm: kernel: Don't harcode flash address Julien Grall
2014-03-14 17:10 ` Ian Campbell
2014-03-14 17:44 ` Julien Grall
2014-03-12 16:15 ` [RFC 02/14] xen/arm: Remove the parameter "attrindx" in copy_paddr Julien Grall
2014-03-14 17:14 ` Ian Campbell
2014-03-14 18:02 ` Julien Grall
2014-03-17 10:13 ` Ian Campbell
2014-03-17 11:53 ` Julien Grall
2014-03-17 12:02 ` Ian Campbell
2014-03-12 16:15 ` [RFC 03/14] xen/arm: Correctly define size_t Julien Grall
2014-03-14 17:18 ` Ian Campbell
2014-03-12 16:15 ` [RFC 04/14] xen/arm: next_module: Skip module if the size is 0 Julien Grall
2014-03-14 17:19 ` Ian Campbell
2014-03-12 16:16 ` [RFC 05/14] xen/xsm: xsm functions for PCI passthrough is not x86 specific Julien Grall
2014-03-13 14:25 ` Daniel De Graaf
2014-03-14 17:20 ` Ian Campbell
2014-03-12 16:16 ` [RFC 06/14] xen/xsm: xsm_do_mca is " Julien Grall
2014-03-13 14:26 ` Daniel De Graaf
2014-03-14 17:21 ` Ian Campbell
2014-03-12 16:16 ` [RFC 07/14] xen/xsm: flask: Fix compilation when CONFIG_COMPAT=y Julien Grall
2014-03-13 14:26 ` Daniel De Graaf
2014-03-14 17:23 ` Ian Campbell
2014-03-14 18:08 ` Julien Grall
2014-03-17 7:22 ` Jan Beulich
2014-03-17 10:15 ` Ian Campbell
2014-03-17 11:57 ` Julien Grall
2014-03-12 16:16 ` [RFC 08/14] xen/xsm: flask: Rename variable "bool" in "b" Julien Grall
2014-03-12 16:26 ` Andrew Cooper
2014-03-13 13:17 ` Julien Grall
2014-03-13 13:57 ` Jan Beulich
2014-03-13 14:27 ` Daniel De Graaf
2014-03-14 17:24 ` Ian Campbell
2014-03-12 16:16 ` [RFC 09/14] xen/xsm: flask: MSI is PCI specific Julien Grall
2014-03-13 14:34 ` Daniel De Graaf
2014-03-13 14:40 ` Julien Grall
2014-03-14 17:25 ` Ian Campbell
2014-03-14 18:15 ` Julien Grall
2014-03-17 10:13 ` Ian Campbell
2014-03-17 12:05 ` Julien Grall [this message]
2014-03-12 16:16 ` [RFC 10/14] xen/xsm: flask: flask_copying_string is taking a XEN_GUEST_HANDLE as first param Julien Grall
2014-03-13 14:34 ` Daniel De Graaf
2014-03-14 17:26 ` Ian Campbell
2014-03-12 16:16 ` [RFC 11/14] xen/xsm: flask: Add missing header in hooks.c Julien Grall
2014-03-13 14:34 ` Daniel De Graaf
2014-03-14 17:26 ` Ian Campbell
2014-03-12 16:16 ` [RFC 12/14] xen/xsm: Don't use multiboot by default to initialize XSM Julien Grall
2014-03-12 16:52 ` Jan Beulich
2014-03-13 14:36 ` Daniel De Graaf
2014-03-14 17:27 ` Ian Campbell
2014-03-12 16:16 ` [RFC 13/14] xen/xsm: Add support for device tree Julien Grall
2014-03-13 14:47 ` Daniel De Graaf
2014-03-14 17:34 ` Ian Campbell
2014-03-14 18:24 ` Julien Grall
2014-03-17 10:15 ` Ian Campbell
2014-03-12 16:16 ` [RFC 14/14] xen/arm: Add support for XSM Julien Grall
2014-03-14 17:34 ` Ian Campbell
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