linux-kernel - Re: MediaGX/GeodeGX1 requires X86

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:	Mon, 19 Feb 2007 09:55:14 -0500
From:	lsorense@...lub.uwaterloo.ca (Lennart Sorensen)
To:	takada <takada@....nifty.com>
Cc:	pcnet32@...izon.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: MediaGX/GeodeGX1 requires X86_OOSTORE.

On Sat, Feb 17, 2007 at 11:11:13PM +0900, takada wrote:
> is it mean what doesn't help with doesn't call set_cx86_reoder()?
> this function disable to reorder at 0x4000:0000 to 0xffff:ffff.
> does pcnet32 access at out of above range?
> 
> --- arch/i386/Kconfig.cpu~	2007-02-05 03:44:54.000000000 +0900
> +++ arch/i386/Kconfig.cpu	2007-02-17 21:25:52.000000000 +0900
> @@ -322,7 +322,7 @@ config X86_USE_3DNOW
>  
>  config X86_OOSTORE
>  	bool
> -	depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR
> +	depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR || MGEODEGX1
>  	default y
>  
>  config X86_TSC

Well it turns out that enabling OOSTORE doesn't elliminate the problem,
but it does make it go from occouring within seconds to occouring within
many hours.  I am off to investigate some more.

Does anyone know if there is any way to flush a cache line of the cpu to
force rereading system memory for a given address or address range?

--
Len Sorensen
-
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/