linux-kernel - Re: [PATCH 3/3] dw_dmac: set default alignment

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4FFFE2B3.3040306@arm.com>
Date:	Fri, 13 Jul 2012 09:56:19 +0100
From:	viresh kumar <viresh.kumar2@....com>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
CC:	viresh kumar <viresh.kumar@...aro.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	spear-devel <spear-devel@...t.st.com>
Subject: Re: [PATCH 3/3] dw_dmac: set default alignment

On 13/07/12 09:45, Andy Shevchenko wrote:
>> > To understand it more, what does this mean? We will not support
>> > transfers with unaligned
>> > addresses/length to word size?
> The dmatest module uses those constants to get source, destination
> addresses and length of the test data aligned. On the other hand we
> can't use unaligned address in LLI because of the hardware restriction
> (2 bits are used for choosing AHB master).

To be clear, we can't use unaligned address of an LLI struct, but src/dest
address inside LLI can be unaligned.

I wanted to ask, will normal memcpy for anybody will work with unaligned addresses
with this patch? I believe they will.

--
Viresh



-- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium.  Thank you.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/