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] [day] [month] [year] [list]
Date:	Wed, 02 May 2007 15:50:34 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	hch@...radead.org
Cc:	mchan@...adcom.com, jeff@...zik.org, netdev@...r.kernel.org
Subject: Re: [PATCH 3/20][BNX2]: Add 40-bit DMA workaround for 5708.

From: Christoph Hellwig <hch@...radead.org>
Date: Wed, 2 May 2007 23:48:58 +0100

> On Wed, May 02, 2007 at 01:02:41PM -0700, Michael Chan wrote:
> > Let's say I have a 32-bit card that cannot do dual address cycle on a
> > 64-bit dma_addr_t system without IOMMU.  If CONFIG_HIGHMEM is not set,
> > wouldn't the device get > 32-bit DMA addresses that it cannot handle?
> 
> It needs to set it's dma mask to 32bits and the upper layers (net, block)
> will do the bouncing for it.  

Not the case for networking, we rely upon the DMA API to take
care of things, which it does.
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ