linux-kernel - Re: tg3 broken after "PCI: Fix bus resource assignment on 32 bits with 64b resources"

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 for Android: free password hash cracker in your pocket

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

Date:	Wed, 06 Feb 2008 07:49:52 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	Alexey Dobriyan <adobriyan@...ru>, linux-kernel@...r.kernel.org
Subject: Re: tg3 broken after "PCI: Fix bus resource assignment on 32 bits
	with 64b resources"


> so x86_64 will work well?
> 
> the problem is that BIOS does not assign one resource for you tg3. and
> kernel pcibios_assign_to_unassign (?) try
> to assign resource to your card.

But the kernel shouldn't try to assign a resource in the 64 bits space
to a card behind a bridge... at least not a non-prefetchable resource
since those can't be forwarded (P2P bridges only define a 32 bits window
for non-prefetchable resources).

So it does look to me like the kernel may be doing something wrong. I
haven't had a chance to look at the logs in details yet (just woke up).

> revert the patch happen to work, you only have 2g less RAM (?), so
> 0x8000000 still can be used.
> 
> sometime you could get hang if your MB have two HT chains. ...because
> BIOS already allocate two io range for the two chain.
> and kernel may assign resource from the range1 belong to HT1 to device
> under HT0.
> solution: need pci root bios to provide _CRS to replace...
> and i have one patch but it only take care of 64 bit kernel for this case.
> 
> 
> easy solution for you: try to get one updated BIOS.


--
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/