From: Arnd Bergmann <arnd@arndb.de>
To: linuxppc-dev@ozlabs.org, benh@kernel.crashing.org
Cc: Christian Krafft <krafft@de.ibm.com>,
cbe-oss-dev@ozlabs.org, Christian Krafft <krafft@linux.ibm.com>
Subject: Re: [Cbe-oss-dev] [patch 02/02] powerpc/cell: add support for power button of future IBM cell blades
Date: Thu, 10 Jul 2008 16:34:47 +0200 [thread overview]
Message-ID: <200807101634.48097.arnd@arndb.de> (raw)
In-Reply-To: <1215636330.8970.387.camel@pasglop>
On Wednesday 09 July 2008, Benjamin Herrenschmidt wrote:
> On Wed, 2008-07-09 at 15:15 +0200, Arnd Bergmann wrote:
> > Ugly, but doable, yes. I wonder if there is a way that we can trigger some
> > interrupt from system_reset_exception context in order to get around the
> > polling though. tasklets and workqueues unfortunately won't do us any good
> > here because they also depend on disabling interrupts.
>
> You can trigger a DEC interrupt at any time but you don't have
> a nice hook to catch it. You can probably trigger an IPI to yourself
> using a special call to the iic, do we have any available number ?
Yes, we are only using 4 out of 15 possible IPIs. Probably worth a try,
but it might not be cleaner than your suggested solution.
Arnd <><
next prev parent reply other threads:[~2008-07-10 14:34 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-04 19:05 [patch 00/11] Cell patches for 2.6.27 arnd
2008-07-04 19:05 ` [patch 01/11] powerpc/cell: add support for power button of future IBM cell blades arnd
2008-07-07 5:12 ` Benjamin Herrenschmidt
2008-07-07 9:23 ` Christian Krafft
[not found] ` <20080707184756.16e52677@linux.ibm.com>
2008-07-07 16:54 ` [Cbe-oss-dev] [patch 01/02] powerpc/cell: cleanup sysreset_hack for " Christian Krafft
2008-07-07 16:56 ` [Cbe-oss-dev] [patch 02/02] powerpc/cell: add support for power button of future " Christian Krafft
2008-07-09 3:35 ` Benjamin Herrenschmidt
2008-07-09 13:15 ` Arnd Bergmann
2008-07-09 20:45 ` Benjamin Herrenschmidt
2008-07-10 14:34 ` Arnd Bergmann [this message]
2008-07-07 5:24 ` [patch 01/11] " Stephen Rothwell
2008-07-07 8:40 ` [Cbe-oss-dev] " Arnd Bergmann
2008-07-04 19:05 ` [patch 02/11] powerpc/axonram: use only one block device major number arnd
2008-07-04 19:05 ` [patch 03/11] powerpc/axonram: enable partitioning of the Axons DDR2 DIMMs arnd
2008-07-04 19:05 ` [patch 04/11] powerpc/spufs: add atomic busy_spus counter to struct cbe_spu_info arnd
2008-07-07 5:19 ` Benjamin Herrenschmidt
2008-07-07 5:30 ` Stephen Rothwell
2008-07-07 8:50 ` [Cbe-oss-dev] " Arnd Bergmann
2008-07-04 19:05 ` [patch 05/11] powerpc/cell: add spu aware cpufreq governor arnd
2008-07-07 5:21 ` Benjamin Herrenschmidt
2008-07-07 5:32 ` Stephen Rothwell
2008-07-07 9:01 ` [Cbe-oss-dev] " Arnd Bergmann
2008-07-07 6:24 ` Stephen Rothwell
2008-07-07 8:58 ` [Cbe-oss-dev] " Arnd Bergmann
2008-07-07 14:59 ` Arnd Bergmann
2008-07-07 15:35 ` Josh Boyer
2008-07-07 21:15 ` Arnd Bergmann
2008-07-07 21:17 ` Josh Boyer
2008-07-08 2:40 ` Stephen Rothwell
2008-07-07 19:56 ` Geoff Levand
2008-07-04 19:05 ` [patch 06/11] powerpc: Add struct iommu_table argument to iommu_map_sg() arnd
2008-07-04 19:05 ` [patch 07/11] powerpc/dma: implement new dma_*map*_attrs() interfaces arnd
2008-07-07 5:27 ` Benjamin Herrenschmidt
2008-07-07 19:15 ` Geoff Levand
2008-07-04 19:05 ` [patch 08/11] powerpc/dma: use the struct dma_attrs in iommu code arnd
2008-07-04 19:05 ` [patch 09/11] powerpc/cell: cell_dma_dev_setup_iommu() return the iommu table arnd
2008-07-04 19:05 ` [patch 10/11] powerpc: move device_to_mask() to dma-mapping.h arnd
2008-07-04 19:05 ` [patch 11/11] powerpc/cell: Add DMA_ATTR_STRONG_ORDERING dma attribute and use in IOMMU code arnd
2008-07-05 5:43 ` [Cbe-oss-dev] " Michael Ellerman
2008-07-05 6:28 ` Benjamin Herrenschmidt
2008-07-05 21:51 ` Arnd Bergmann
2008-07-05 22:20 ` Benjamin Herrenschmidt
2008-07-06 15:15 ` Arnd Bergmann
2008-07-07 0:00 ` Michael Ellerman
2008-07-07 9:01 ` Arnd Bergmann
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