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From: Jiaxun Yang <jiaxun.yang@flygoat.com>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Marc Zyngier <maz@kernel.org>,
	linux-mips@vger.kernel.org, Huacai Chen <chenhc@lemote.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Jason Cooper <jason@lakedaemon.net>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jonathan Cameron <Jonathan.Cameron@huawei.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Allison Randal <allison@lohutok.net>,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org
Subject: Re: [PATCH v8 06/11] irqchip: mips-cpu: Convert to simple domain
Date: Thu, 26 Mar 2020 00:02:28 +0800
Message-ID: <8F2B64C3-A887-4D4B-ABEA-4BE3D30F4632@flygoat.com> (raw)
In-Reply-To: <20200325154600.GA14923@alpha.franken.de>



于 2020年3月25日 GMT+08:00 下午11:46:00, Thomas Bogendoerfer <tsbogend@alpha.franken.de> 写到:
>On Wed, Mar 25, 2020 at 11:09:10PM +0800, Jiaxun Yang wrote:
>> 
>> 
>> 于 2020年3月25日 GMT+08:00 下午11:04:37, Thomas Bogendoerfer
><tsbogend@alpha.franken.de> 写到:
>> >On Wed, Mar 25, 2020 at 10:31:21PM +0800, Jiaxun Yang wrote:
>> >> 
>> >> 
>> >> 于 2020年3月25日 GMT+08:00 下午10:15:16, Marc Zyngier <maz@kernel.org>
>写到:
>> >> >On 2020-03-25 13:59, Jiaxun Yang wrote:
>> >> >
>> >> >[...]
>> >> >
>> >> >>>> So probably we can use legacy domain when  MIPS IRQ BASE is
>in
>> >the
>> >> >>>> range of legacy IRQ
>> >> >>>> and switch to simple domain when it's not in that range?
>> >> >>> 
>> >> >>> No, see below.
>> >> >>> 
>> >> >>>> Here in Loongson systems IRQ 0-15 is occupied by I8259 so I
>did
>> >> >this
>> >> >>>> hack.
>> >> >>> 
>> >> >>> Well, if you have to consider which Linux IRQ gets assigned,
>> >> >>> then your platform is definitely not ready for non-legacy
>> >> >>> irqdomains. Just stick to legacy for now until you have
>removed
>> >> >>> all the code that knows the hwirq mapping.
>> >> >> 
>> >> >> Thanks.
>> >> >> 
>> >> >> So I have to allocate irq_desc here in driver manually?
>> >> >
>> >> >No, you are probably better off just dropping this patch, as MIPS
>> >> >doesn't seem to be ready for a wholesale switch to virtual
>> >interrupts.
>> >> 
>> >> It can't work without this patch.
>> >> 
>> >> Legacy domain require IRQ number within 0-15 
>> >> however it's already occupied by i8259 or "HTPIC" driver.
>> >
>> >what's the problem here ? AFAIK there could be more than one
>> >legacy domain, at least that's what at least IP22/SNI in MIPS world 
>> >are doing.
>> 
>> MIPS_IRQ_BASE must be higher than 15, otherwise it will conflict with
>i8259.
>
>I still don't get it.
>
>We have following in arch/mips/include/asm/mach-generic/irq.h:
>
>#ifndef MIPS_CPU_IRQ_BASE
>#ifdef CONFIG_I8259
>#define MIPS_CPU_IRQ_BASE 16
>#else
>#define MIPS_CPU_IRQ_BASE 0
>#endif /* CONFIG_I8259 */
>#endif
>
>So every legacy platform with i8259 has MIPS_CPU_IRQ_BASE = 16.
>
>> However we have only preallocated irq_desc for 0-15.
>> And legacy domain require irq_desc being preallocated.
>
>maybe I'm too fast by judging the irq code, but without
>CONFIG_SPARSE_IRQ
>the whole irq_desc is pre-allocated.

Sorry. You're right.
I found the problem is CONFIG_SPARSE_IRQ is accidentally enabled in my config due to another out-of-tree patch
during my initial test and I always consider it as a problem.

So we can drop this patch safely for now.
But just need to consider how to deal with it when we want to enable SPARSE_IRQ.

Thanks.

>
>Thomas.

-- 
Jiaxun Yang

  reply index

Thread overview: 175+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-27  8:52 [PATCH 00/13] Modernize Loongson64 Machine Jiaxun Yang
2019-08-27  8:52 ` [PATCH 01/13] MIPS: Loongson64: Rename CPU TYPES Jiaxun Yang
2019-08-27  8:52 ` [PATCH 02/13] MIPS: Loongson64: Sepreate loongson2ef/loongson64 code Jiaxun Yang
2019-08-27 22:05   ` Aaro Koskinen
2019-08-28  0:37     ` Jiaxun Yang
2019-09-02 17:51       ` Aaro Koskinen
2019-08-27  8:52 ` [PATCH 03/13] MAINTAINERS: Fix entries for new loongson64 path Jiaxun Yang
2019-08-27  8:52 ` [PATCH 04/13] irqchip: Add driver for Loongson-3 I/O interrupt controller Jiaxun Yang
2019-08-27 16:45   ` Marc Zyngier
2019-08-28  0:27     ` Jiaxun Yang
2019-08-28  6:59       ` Marc Zyngier
2019-08-28 15:31         ` Jiaxun Yang
2019-08-28 16:02           ` Marc Zyngier
2019-08-27  8:52 ` [PATCH 05/13] dt-bindings: interrupt-controller: Add Loongson-3 IOINTC Jiaxun Yang
2019-08-27 13:08   ` Rob Herring
2019-08-27  8:52 ` [PATCH 06/13] irqchip: Add driver for Loongson-3 HyperTransport interrupt controller Jiaxun Yang
2019-08-27 12:53   ` Marc Zyngier
2019-08-27  8:52 ` [PATCH 07/13] dt-bindings: interrupt-controller: Add Loongson-3 HTINTC Jiaxun Yang
2019-08-27 12:49   ` Rob Herring
2019-08-27 14:08     ` Jiaxun Yang
2019-08-27  8:52 ` [PATCH 08/13] irqchip: i8259: Add plat-poll support Jiaxun Yang
2019-08-27  8:52 ` [PATCH 09/13] irqchip: mips-cpu: Convert to simple domain Jiaxun Yang
2019-08-27  8:52 ` [PATCH 10/13] MIPS: Loongson64: Drop legacy IRQ code Jiaxun Yang
2019-08-27  8:53 ` [PATCH 11/13] dt-bindings: mips: Add loongson cpus & boards Jiaxun Yang
2019-08-27 12:45   ` Rob Herring
2019-08-27 14:18     ` Jiaxun Yang
2019-08-27 20:41       ` Paul Burton
2019-08-28  0:15         ` Jiaxun Yang
2019-09-02 14:50         ` Rob Herring
2019-09-03  9:07           ` Paul Burton
2019-09-04  3:33             ` Huacai Chen
2019-08-27  8:53 ` [PATCH 12/13] MIPS: Loongson64: Add generic dts Jiaxun Yang
2019-08-27  8:53 ` [PATCH 13/13] MIPS: Loongson64: Load built-in dtbs Jiaxun Yang
2019-08-27 13:25 ` Re:[PATCH 00/13] Modernize Loongson64 Machine 陈华才
2019-08-27 14:39   ` [PATCH " Jiaxun Yang
2019-08-30  4:25 ` [PATCH v1 00/18] " Jiaxun Yang
2019-08-30  4:25   ` [PATCH v1 01/18] MIPS: Loongson64: Rename CPU TYPES Jiaxun Yang
2019-08-30  4:25   ` [PATCH v1 02/18] MIPS: Loongson64: separate loongson2ef/loongson64 code Jiaxun Yang
2019-08-30  4:25   ` [PATCH v1 03/18] MAINTAINERS: Fix entries for new loongson64 path Jiaxun Yang
2019-08-30  4:25   ` [PATCH v1 04/18] irqchip: Export generic chip domain map/unmap functions Jiaxun Yang
2019-08-30  4:25   ` [PATCH v1 05/18] irqchip: Add driver for Loongson-3 I/O interrupt controller Jiaxun Yang
2019-08-30  4:25   ` [PATCH v1 06/18] dt-bindings: interrupt-controller: Add Loongson-3 IOINTC Jiaxun Yang
2019-09-05 14:42 ` [PATCH v2 00/19] Modernize Loongson64 Machine Jiaxun Yang
2019-09-05 14:42   ` [PATCH v2 01/19] MIPS: Loongson64: Rename CPU TYPES Jiaxun Yang
2019-09-05 14:42   ` [PATCH v2 02/19] MIPS: Loongson64: separate loongson2ef/loongson64 code Jiaxun Yang
2019-09-10  0:12     ` Paul Burton
2019-09-16  2:23       ` Huacai Chen
2019-09-18  0:38       ` Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 03/19] MAINTAINERS: Fix entries for new loongson64 path Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 04/19] irqchip: Export generic chip domain map/unmap functions Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 05/19] irqchip: Add driver for Loongson-3 I/O interrupt controller Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 06/19] dt-bindings: interrupt-controller: Add Loongson-3 IOINTC Jiaxun Yang
2019-09-17 21:26     ` Rob Herring
2019-09-05 14:43   ` [PATCH v2 07/19] irqchip: Add driver for Loongson-3 HyperTransport interrupt controller Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 08/19] dt-bindings: interrupt-controller: Add Loongson-3 HTINTC Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 09/19] irqchip: i8259: Add plat-poll support Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 10/19] irqchip: mips-cpu: Convert to simple domain Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 11/19] MIPS: Loongson64: Drop legacy IRQ code Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 12/19] dt-bindings: mips: Add loongson boards Jiaxun Yang
2019-09-30 13:23     ` Rob Herring
2019-09-05 14:43   ` [PATCH v2 13/19] dt-bindings: Document loongson vendor-prefix Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 14/19] MIPS: Loongson64: Add generic dts Jiaxun Yang
2019-09-07  2:53     ` Huacai Chen
2019-09-07  3:14       ` Jiaxun Yang
2019-09-30 13:20     ` Rob Herring
2019-09-05 14:43   ` [PATCH v2 15/19] MIPS: Loongson64: Load built-in dtbs Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 16/19] GPIO: loongson: Drop Loongson-3A/3B support Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 17/19] MIPS: Loongson: Regenerate defconfigs Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 18/19] MAINTAINERS: Add new pathes to LOONGSON64 ARCHITECTURE Jiaxun Yang
2019-09-05 14:43   ` [PATCH v2 19/19] MAINTAINERS: Add myself as maintainer of LOONGSON64 Jiaxun Yang
2019-09-07  3:13   ` [PATCH v2 00/19] Modernize Loongson64 Machine Huacai Chen
2019-09-12  6:30 ` [PATCH 00/13] " Matt Turner
2019-09-18  0:33   ` Jiaxun Yang
2020-01-12  8:14 ` [PATCH v3 00/10] " Jiaxun Yang
2020-01-12  8:14   ` [PATCH v3 01/10] dt-bindings: Document loongson vendor-prefix Jiaxun Yang
2020-01-15 18:59     ` Paul Burton
2020-01-12  8:14   ` [PATCH v3 02/10] irqchip: Add driver for Loongson I/O interrupt controller Jiaxun Yang
2020-01-12  8:14   ` [PATCH v3 03/10] dt-bindings: interrupt-controller: Add Loongson IOINTC Jiaxun Yang
2020-01-13  3:44     ` Huacai Chen
2020-01-13  3:40       ` Jiaxun Yang
2020-01-12  8:14   ` [PATCH v3 04/10] irqchip: Add driver for Loongson-3 HyperTransport PIC controller Jiaxun Yang
2020-01-12  8:14   ` [PATCH v3 05/10] dt-bindings: interrupt-controller: Add Loongson-3 HTPIC Jiaxun Yang
2020-01-12  8:14   ` [PATCH v3 06/10] irqchip: mips-cpu: Convert to simple domain Jiaxun Yang
2020-01-12  8:14   ` [PATCH v3 07/10] MIPS: Loongson64: Drop legacy IRQ code Jiaxun Yang
2020-01-12  8:14   ` [PATCH v3 08/10] dt-bindings: mips: Add loongson boards Jiaxun Yang
2020-01-13  3:39     ` Huacai Chen
2020-01-12  8:14   ` [PATCH v3 09/10] MIPS: Loongson64: Add generic dts Jiaxun Yang
2020-01-12  8:14   ` [PATCH v3 10/10] MIPS: Loongson64: Load built-in dtbs Jiaxun Yang
2020-01-13  3:38   ` [PATCH v3 00/10] Modernize Loongson64 Machine Huacai Chen
2020-02-21  5:09 ` [PATCH v4 00/10] Modernize Loongson64 Machine v4 Jiaxun Yang
2020-02-21  5:09   ` [PATCH v4 01/10] irqchip: Add driver for Loongson I/O Local Interrupt Controller Jiaxun Yang
2020-02-29  2:30     ` 回复:[PATCH " Jiaxun Yang
2020-03-07 14:50     ` [PATCH " Marc Zyngier
2020-02-21  5:09   ` [PATCH v4 02/10] dt-bindings: interrupt-controller: Add Loongson LIOINTC Jiaxun Yang
2020-02-21  5:09   ` [PATCH v4 03/10] irqchip: Add driver for Loongson-3 HyperTransport PIC controller Jiaxun Yang
2020-03-07 15:01     ` Marc Zyngier
2020-02-21  5:09   ` [PATCH v4 04/10] dt-bindings: interrupt-controller: Add Loongson-3 HTPIC Jiaxun Yang
2020-02-21  5:09   ` [PATCH v4 05/10] irqchip: mips-cpu: Convert to simple domain Jiaxun Yang
2020-02-21  5:09   ` [PATCH v4 06/10] MIPS: Loongson64: Drop legacy IRQ code Jiaxun Yang
2020-02-21  5:09   ` [PATCH v4 07/10] dt-bindings: mips: Add loongson boards Jiaxun Yang
2020-02-26 16:52     ` Rob Herring
2020-02-29  2:28       ` Jiaxun Yang
2020-02-21  5:09   ` [PATCH v4 08/10] MIPS: Loongson64: Add generic dts Jiaxun Yang
2020-02-21  5:09   ` [PATCH v4 09/10] MIPS: Loongson64: Load built-in dtbs Jiaxun Yang
2020-02-21  5:09   ` [PATCH v4 10/10] MIPS: Loongson64: Move MIPS_CPU_IRQ_BASE Jiaxun Yang
2020-03-18  6:20 ` [PATCH v5 00/11] Modernize Loongson64 Machine v5 Jiaxun Yang
2020-03-18  6:20   ` [PATCH v5 01/11] irqchip: Add driver for Loongson I/O Local Interrupt Controller Jiaxun Yang
2020-03-18  6:20   ` [PATCH v5 02/11] irqchip: loongson-liointc: Workaround LPC IRQ Errata Jiaxun Yang
2020-03-18  6:20   ` [PATCH v5 03/11] dt-bindings: interrupt-controller: Add Loongson LIOINTC Jiaxun Yang
2020-03-18  6:20   ` [PATCH v5 04/11] irqchip: Add driver for Loongson-3 HyperTransport PIC controller Jiaxun Yang
2020-03-21 14:14     ` Marc Zyngier
2020-03-18  6:20   ` [PATCH v5 05/11] dt-bindings: interrupt-controller: Add Loongson-3 HTPIC Jiaxun Yang
2020-03-18  6:20   ` [PATCH v5 06/11] irqchip: mips-cpu: Convert to simple domain Jiaxun Yang
2020-03-18  6:20   ` [PATCH v5 07/11] MIPS: Loongson64: Drop legacy IRQ code Jiaxun Yang
2020-03-18  6:20   ` [PATCH v5 08/11] dt-bindings: mips: Add loongson boards Jiaxun Yang
2020-03-20 22:36     ` Rob Herring
2020-03-22  5:33     ` Zhou Yanjie
2020-03-18  6:20   ` [PATCH v5 09/11] MIPS: Loongson64: Add generic dts Jiaxun Yang
2020-03-18  6:20   ` [PATCH v5 10/11] MIPS: Loongson64: Load built-in dtbs Jiaxun Yang
2020-03-18  6:20   ` [PATCH v5 11/11] MIPS: Loongson64: Move MIPS_CPU_IRQ_BASE Jiaxun Yang
2020-03-24 15:35 ` [PATCH v6 00/11] Modernize Loongson64 Machine v6 Jiaxun Yang
2020-03-24 15:35   ` [PATCH v6 01/11] irqchip: Add driver for Loongson I/O Local Interrupt Controller Jiaxun Yang
2020-03-24 15:35   ` [PATCH v6 02/11] irqchip: loongson-liointc: Workaround LPC IRQ Errata Jiaxun Yang
2020-03-25  1:52     ` Huacai Chen
2020-03-25  2:31       ` Jiaxun Yang
2020-03-24 15:36   ` [PATCH v6 03/11] dt-bindings: interrupt-controller: Add Loongson LIOINTC Jiaxun Yang
2020-03-24 15:36   ` [PATCH v6 04/11] irqchip: Add driver for Loongson-3 HyperTransport PIC controller Jiaxun Yang
2020-03-24 15:36   ` [PATCH v6 05/11] dt-bindings: interrupt-controller: Add Loongson-3 HTPIC Jiaxun Yang
2020-03-24 15:36   ` [PATCH v6 06/11] irqchip: mips-cpu: Convert to simple domain Jiaxun Yang
2020-03-24 15:36   ` [PATCH v6 07/11] MIPS: Loongson64: Drop legacy IRQ code Jiaxun Yang
2020-03-24 15:36   ` [PATCH v6 08/11] dt-bindings: mips: Add loongson boards Jiaxun Yang
2020-03-24 15:36   ` [PATCH v6 09/11] MIPS: Loongson64: Add generic dts Jiaxun Yang
2020-03-25  2:11     ` Huacai Chen
2020-03-25  2:08       ` Jiaxun Yang
2020-03-25  2:49         ` Huacai Chen
2020-03-24 15:36   ` [PATCH v6 10/11] MIPS: Loongson64: Load built-in dtbs Jiaxun Yang
2020-03-24 15:36   ` [PATCH v6 11/11] MIPS: Loongson64: Move MIPS_CPU_IRQ_BASE Jiaxun Yang
2020-03-24 15:47   ` [PATCH v6 00/11] Modernize Loongson64 Machine v6 Marc Zyngier
2020-03-24 15:51     ` Jiaxun Yang
2020-03-24 18:07       ` Thomas Bogendoerfer
2020-03-25  2:28 ` [PATCH v7 00/12] " Jiaxun Yang
2020-03-25  2:28   ` [PATCH v7 01/12] irqchip: Add driver for Loongson I/O Local Interrupt Controller Jiaxun Yang
2020-03-25 11:25     ` Paul Cercueil
2020-03-25 11:35       ` Marc Zyngier
2020-03-25  2:28   ` [PATCH v7 01/12] MIPS: Loongson: Do not initialise statics to 0 Jiaxun Yang
2020-03-25  2:28   ` [PATCH v7 02/12] irqchip: loongson-liointc: Workaround LPC IRQ Errata Jiaxun Yang
2020-03-25  2:28   ` [PATCH v7 02/12] MIPS: DTS: CI20: add DT node for IR sensor Jiaxun Yang
2020-03-25  2:28   ` [PATCH v7 03/12] dt-bindings: interrupt-controller: Add Loongson LIOINTC Jiaxun Yang
2020-03-25  3:54 ` [PATCH v8 00/11] Modernize Loongson64 Machine v8 Jiaxun Yang
2020-03-25  3:54   ` [PATCH v8 01/11] irqchip: Add driver for Loongson I/O Local Interrupt Controller Jiaxun Yang
2020-03-25  3:54   ` [PATCH v8 02/11] irqchip: loongson-liointc: Workaround LPC IRQ Errata Jiaxun Yang
2020-03-25  3:54   ` [PATCH v8 03/11] dt-bindings: interrupt-controller: Add Loongson LIOINTC Jiaxun Yang
2020-03-25  3:54   ` [PATCH v8 04/11] irqchip: Add driver for Loongson-3 HyperTransport PIC controller Jiaxun Yang
2020-03-25  3:54   ` [PATCH v8 05/11] dt-bindings: interrupt-controller: Add Loongson-3 HTPIC Jiaxun Yang
2020-03-25  3:54   ` [PATCH v8 06/11] irqchip: mips-cpu: Convert to simple domain Jiaxun Yang
2020-03-25 12:37     ` Thomas Bogendoerfer
2020-03-25 12:48       ` Jiaxun Yang
2020-03-25 13:00       ` Marc Zyngier
2020-03-25 13:07         ` Jiaxun Yang
2020-03-25 13:57           ` Marc Zyngier
2020-03-25 13:59             ` Jiaxun Yang
2020-03-25 14:15               ` Marc Zyngier
2020-03-25 14:31                 ` Jiaxun Yang
2020-03-25 15:02                   ` Marc Zyngier
2020-03-25 15:04                   ` Thomas Bogendoerfer
2020-03-25 15:09                     ` Jiaxun Yang
2020-03-25 15:46                       ` Thomas Bogendoerfer
2020-03-25 16:02                         ` Jiaxun Yang [this message]
2020-03-25 16:31                           ` Thomas Bogendoerfer
2020-03-25  3:55   ` [PATCH v8 07/11] MIPS: Loongson64: Drop legacy IRQ code Jiaxun Yang
2020-03-25  3:55   ` [PATCH v8 08/11] dt-bindings: mips: Add loongson boards Jiaxun Yang
2020-03-25  3:55   ` [PATCH v8 09/11] MIPS: Loongson64: Add generic dts Jiaxun Yang
2020-03-25  3:55   ` [PATCH v8 10/11] MIPS: Loongson64: Load built-in dtbs Jiaxun Yang
2020-03-25  3:55   ` [PATCH v8 11/11] MAINTAINERS: Update Loongson64 entry Jiaxun Yang
2020-03-25 17:33   ` [PATCH v8 00/11] Modernize Loongson64 Machine v8 Thomas Bogendoerfer

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