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| Path | csiph.com!weretis.net!feeder4.news.weretis.net!news.mixmin.net!aioe.org!bofh.it!news.nic.it!robomod |
|---|---|
| From | Alan Cox <gnomes@lxorguk.ukuu.org.uk> |
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 4/7] alpha: provide ioread64 and iowrite64 implementations |
| Date | Thu, 22 Jun 2017 22:10:01 +0200 |
| Message-ID | <tVgAp-Xd-9@gated-at.bofh.it> (permalink) |
| References | <tVdsS-7hT-17@gated-at.bofh.it> <tVdCA-7lD-69@gated-at.bofh.it> |
| X-Original-To | Logan Gunthorpe <logang@deltatee.com> |
| Organization | Intel Corporation |
| X-Mailer | Claws Mail 3.14.1 (GTK+ 2.24.31; x86_64-redhat-linux-gnu) |
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| Sender | robomod@news.nic.it |
| List-ID | <linux-kernel.vger.kernel.org> |
| X-Mailing-List | linux-kernel@vger.kernel.org |
| Approved | robomod@news.nic.it |
| Lines | 17 |
| X-Original-Cc | linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-ntb@googlegroups.com, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-crypto@vger.kernel.org, dri-devel@lists.freedesktop.org, Arnd Bergmann <arnd@arndb.de>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Stephen Bates <sbates@raithlin.com>, Richard Henderson <rth@twiddle.net>, Ivan Kokshaysky <ink@jurassic.park.msu.ru>, Matt Turner <mattst88@gmail.com> |
| X-Original-Date | Thu, 22 Jun 2017 21:08:28 +0100 |
| X-Original-Message-ID | <20170622210828.27304f6a@alans-desktop> |
| X-Original-References | <20170622164817.25515-1-logang@deltatee.com> <20170622164817.25515-5-logang@deltatee.com> |
| X-Original-Sender | linux-kernel-owner@vger.kernel.org |
| Xref | csiph.com linux.kernel:1673017 |
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On Thu, 22 Jun 2017 10:48:14 -0600 Logan Gunthorpe <logang@deltatee.com> wrote: > Alpha implements its own io operation and doesn't use the > common library. Thus to make ioread64 and iowrite64 globally > available we need to add implementations for alpha. > > For this, we simply use calls that chain two 32-bit operations. > (mostly because I don't really understand the alpha architecture.) But this does not do the same thing as an ioread64 with regards to atomicity or side effects on the device. The same is true of the other hacks. You either have a real 64bit single read/write from MMIO space or you don't. You can't fake it. Alan
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[PATCH 4/7] alpha: provide ioread64 and iowrite64 implementations Logan Gunthorpe <logang@deltatee.com> - 2017-06-22 19:00 +0200
Re: [PATCH 4/7] alpha: provide ioread64 and iowrite64 implementations "Stephen Bates" <sbates@raithlin.com> - 2017-06-22 19:30 +0200
Re: [PATCH 4/7] alpha: provide ioread64 and iowrite64 implementations Logan Gunthorpe <logang@deltatee.com> - 2017-06-22 19:40 +0200
Re: [PATCH 4/7] alpha: provide ioread64 and iowrite64 implementations Alan Cox <gnomes@lxorguk.ukuu.org.uk> - 2017-06-22 22:10 +0200
Re: [PATCH 4/7] alpha: provide ioread64 and iowrite64 implementations Logan Gunthorpe <logang@deltatee.com> - 2017-06-22 22:20 +0200
Re: [PATCH 4/7] alpha: provide ioread64 and iowrite64 implementations Arnd Bergmann <arnd@arndb.de> - 2017-06-22 23:10 +0200
Re: [PATCH 4/7] alpha: provide ioread64 and iowrite64 implementations Logan Gunthorpe <logang@deltatee.com> - 2017-06-22 23:20 +0200
Re: [PATCH 4/7] alpha: provide ioread64 and iowrite64 implementations Richard Henderson <rth@twiddle.net> - 2017-06-22 23:30 +0200
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