[PATCH] PPC601 MQ handling

[Benjamin Herrenschmidt]

On Wed, 2004-06-16 at 15:42, Stef Simoens wrote:
> This is a patch to handle the MQ-register found on 601 CPU's. It's a diff against linux-2.6.7. Could this patch be included in further Linux kernels?
>
> The patch can also be downloaded from http://users.tijd.com/~tdn46485/linux-2.6.7-mq.patch
> I also wrote a small testcase (http://users.tijd.com/~tdn46485/mqtest.s)
> The test makes a division, enters a for loop, and prints the contents of the MQ register.
>
> Changes:
> * Add a CONFIG_PPC601_MQ option
> * Set CPU_FTR_MQ for 601 (arch/ppc/cputable.c, include/asm-ppc/cputable.h)
> * Save and restore the MQ register (arch/ppc/entry.S, include/asm-ppc/reg.h)
> * Delete the 'not used' message, mq debug (arch/ppc/kernel/ppc-stub.c, include/asm-ppc/ptrace.h)
>
> Signed-off-by: Stef Simoens <stef.simoens at pi.be>

Did you check it was actually saved/restored by the signal code ?

Ben.


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