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From: david.vrabel@citrix.com (David Vrabel)
To: linux-arm-kernel@lists.infradead.org
Subject: [Xen-devel] [PATCH v1 04/21] x86/xen/MSI: Eliminate arch_msix_mask_irq() and arch_msi_mask_irq()
Date: Thu, 11 Sep 2014 14:08:34 +0100	[thread overview]
Message-ID: <54119ED2.3070802@citrix.com> (raw)
In-Reply-To: <5410F955.80609@huawei.com>

On 11/09/14 02:22, Yijing Wang wrote:
> On 2014/9/10 20:36, David Vrabel wrote:
>> On 05/09/14 11:09, Yijing Wang wrote:
>>> Commit 0e4ccb150 added two __weak arch functions arch_msix_mask_irq()
>>> and arch_msi_mask_irq() to fix a bug found when running xen in x86.
>>> Introduced these two funcntions make MSI code complex. And mask/unmask
>>> is the irq actions related to interrupt controller, should not use
>>> weak arch functions to override mask/unmask interfaces. This patch
>>> reverted commit 0e4ccb150 and export struct irq_chip msi_chip, modify
>>> msi_chip->irq_mask/irq_unmask() in xen init functions to fix this
>>> bug for simplicity. Also this is preparation for using struct
>>> msi_chip instead of weak arch MSI functions in all platforms.
>>
>> Acked-by: David Vrabel <david.vrabel@citrix.com>
>>
>> But I wonder if it would be better the Xen subsystem to provide its own
>> struct irq_chip instead of adjusting the fields in the generic x86 one.
> 
> Thanks! Currently, Xen and the bare x86 system only have the different irq_chip->irq_mask/irq_unmask.
> So I chose to override the two ops of bare x86 irq_chip in xen. Konrad Rzeszutek Wilk has been tested it
> ok in his platform, so I think we could use its own irq_chip for xen later if the difference become large.

This sounds reasonable.

David

  reply	other threads:[~2014-09-11 13:08 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-05 10:09 [PATCH v1 00/21] Use MSI chip to configure MSI/MSI-X in all platforms Yijing Wang
2014-09-05 10:09 ` [PATCH v1 01/21] PCI/MSI: Clean up struct msi_chip argument Yijing Wang
2014-09-05 10:09 ` [PATCH v1 02/21] PCI/MSI: Remove useless bus->msi assignment Yijing Wang
2014-09-05 10:09 ` [PATCH v1 03/21] MSI: Remove the redundant irq_set_chip_data() Yijing Wang
2014-09-15 14:00   ` Lucas Stach
2014-09-16  1:30     ` Yijing Wang
2014-09-16 10:29       ` Lucas Stach
2014-09-16 10:37         ` Yijing Wang
2014-09-05 10:09 ` [PATCH v1 04/21] x86/xen/MSI: Eliminate arch_msix_mask_irq() and arch_msi_mask_irq() Yijing Wang
2014-09-10 12:36   ` [Xen-devel] " David Vrabel
2014-09-11  1:22     ` Yijing Wang
2014-09-11 13:08       ` David Vrabel [this message]
2014-09-05 10:09 ` [PATCH v1 05/21] PCI/MSI: Introduce weak arch_find_msi_chip() to find MSI chip Yijing Wang
2014-09-15 14:42   ` Lucas Stach
2014-09-16  2:08     ` Yijing Wang
2014-09-05 10:09 ` [PATCH v1 06/21] PCI/MSI: Refactor struct msi_chip to make it become more common Yijing Wang
2014-09-15 14:44   ` Lucas Stach
2014-09-16  2:09     ` Yijing Wang
2014-09-05 10:09 ` [PATCH v1 07/21] x86/MSI: Use MSI chip framework to configure MSI/MSI-X irq Yijing Wang
2014-09-05 10:09 ` [PATCH v1 08/21] x86/xen/MSI: " Yijing Wang
2014-09-05 14:29   ` [Xen-devel] " David Vrabel
2014-09-09  2:06     ` Yijing Wang
2014-09-10 12:38       ` David Vrabel
2014-09-10 14:59         ` Konrad Rzeszutek Wilk
2014-09-11  1:28           ` Yijing Wang
2014-09-11  1:27         ` Yijing Wang
2014-09-05 10:09 ` [PATCH v1 09/21] Irq_remapping/MSI: " Yijing Wang
2014-09-05 10:42   ` Sergei Shtylyov
2014-09-05 11:30     ` wangyijing
2014-09-05 10:09 ` [PATCH v1 10/21] x86/MSI: Remove unused MSI weak arch functions Yijing Wang
2014-09-05 10:09 ` [PATCH v1 11/21] MIPS/Octeon/MSI: Use MSI chip framework to configure MSI/MSI-X irq Yijing Wang
2014-09-05 10:09 ` [PATCH v1 12/21] MIPS/Xlp: Remove the dead function destroy_irq() to fix build error Yijing Wang
2014-09-05 10:09 ` [PATCH v1 13/21] MIPS/Xlp/MSI: Use MSI chip framework to configure MSI/MSI-X irq Yijing Wang
2014-09-05 10:09 ` [PATCH v1 14/21] MIPS/Xlr/MSI: " Yijing Wang
2014-09-05 10:10 ` [PATCH v1 15/21] Powerpc/MSI: " Yijing Wang
2014-09-05 10:47   ` Sergei Shtylyov
2014-09-05 11:33     ` wangyijing
2014-09-05 11:41       ` Sergei Shtylyov
2014-09-16  5:28   ` Michael Ellerman
2014-09-16  5:40     ` Yijing Wang
2014-09-05 10:10 ` [PATCH v1 16/21] s390/MSI: " Yijing Wang
2014-09-16 11:35   ` Sebastian Ott
2014-09-17  1:24     ` Yijing Wang
2014-09-05 10:10 ` [PATCH v1 17/21] arm/iop13xx/MSI: " Yijing Wang
2014-09-05 10:10 ` [PATCH v1 18/21] IA64/MSI: " Yijing Wang
2014-09-05 10:10 ` [PATCH v1 19/21] Sparc/MSI: " Yijing Wang
2014-09-05 10:10 ` [PATCH v1 20/21] tile/MSI: " Yijing Wang
2014-09-05 10:10 ` [PATCH v1 21/21] PCI/MSI: Clean up unused MSI arch functions Yijing Wang
2014-09-15 14:47   ` Lucas Stach
2014-09-16  2:09     ` Yijing Wang
2014-09-23 21:09 ` [PATCH v1 00/21] Use MSI chip to configure MSI/MSI-X in all platforms Bjorn Helgaas
2014-09-24  3:52   ` Yijing Wang

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