linux-kernel - Re: [PATCH] ALSA: hda-intel - Disable MSI support by default

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]

Date:	Tue, 14 Nov 2006 20:07:19 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	benh@...nel.crashing.org
Cc:	torvalds@...l.org, jeff@...zik.org, linux-kernel@...r.kernel.org,
	tiwai@...e.de
Subject: Re: [PATCH] ALSA: hda-intel - Disable MSI support by default

From: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Date: Wed, 15 Nov 2006 15:01:00 +1100

> Out of curiosity. Are you sure there is no case of stupid bridge
> converting the MSI into some APIC/whatever interrupt for the CPU
> potentially before all previous DMA have been fully pushed to the
> coherent domain (still in some internal store queue for example) ?

That would really suck, wouldn't it :)

However, they have to do all the work of processing the memory
transation that the MSI is on the PCI bus, I don't think they would go
so far out of their way to reorder things even if they converted the
MSI packet into a PIN to the APIC, for example.
-
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/