linux-kernel - Re: [PATCH 1/4] net: sgi: ioc3-eth: don't abuse dma_direct

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: <20191031161817.b24181a2e7af3df994eec6c5@suse.de>
Date:   Thu, 31 Oct 2019 16:18:17 +0100
From:   Thomas Bogendoerfer <tbogendoerfer@...e.de>
To:     Christoph Hellwig <hch@....de>
Cc:     "David S. Miller" <davem@...emloft.net>,
        linux-mips@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] net: sgi: ioc3-eth: don't abuse dma_direct_* calls

On Thu, 31 Oct 2019 14:15:01 +0100
Christoph Hellwig <hch@....de> wrote:

> On Thu, Oct 31, 2019 at 09:54:30AM +0100, Thomas Bogendoerfer wrote:
> > I didn't want to argue about that. What I'm interested in is a way how 
> > to allocate dma memory, which is 16kB aligned, via the DMA API ?
> 
> You can't.

So then __get_free_pages() and dma_map_page() is the only way ?

BTW I've successful tested your patches on an 8 CPU Origin 2k.

Thomas.

-- 
SUSE Software Solutions Germany GmbH
HRB 36809 (AG Nürnberg)
Geschäftsführer: Felix Imendörffer