linux-kernel - Re: [RFC PATCH 08/17] powerpc/e500: Remove conditional "lwsync" substitution

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: <3937191C-A735-4668-8E80-9FB4B35E2F63@kernel.crashing.org>
Date:	Thu, 10 Nov 2011 07:40:04 -0600
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Kyle Moffett <Kyle.D.Moffett@...ing.com>
Cc:	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	Baruch Siach <baruch@...s.co.il>,
	Timur Tabi <B04825@...escale.com>,
	Scott Wood <scottwood@...escale.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [RFC PATCH 08/17] powerpc/e500: Remove conditional "lwsync" substitution


On Nov 9, 2011, at 6:07 PM, Kyle Moffett wrote:

> As FreeScale e500 systems have different cacheline sizes from e500mc, it
> is basically impossible for the kernel to support both in a single
> system image at present.
> 
> Given that one is SPE-float and the other is classic-float, they are not
> generally userspace-compatible either.
> 
> This patch updates the conditional to depend on whether the system is
> actually targetting an "e500" or "e500mc" core and entirely removes the
> unused sync-to-lwsync-replacement on e500v1/e500v2 systems.
> 
> Signed-off-by: Kyle Moffett <Kyle.D.Moffett@...ing.com>
> ---
> arch/powerpc/include/asm/synch.h |   16 ++++------------
> 1 files changed, 4 insertions(+), 12 deletions(-)

Nak, we can run an e500mc in a mode that is compatible with e500v1/v2.  I see no reason to change the support we have there.

- k--
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/