Re: [Qemu-ppc] [Qemu-devel] [PATCH] PPC: Allow book3s ppc32 to run dcbzl

[Scott Wood]

On 01/29/2013 07:52:58 AM, Alexander Graf wrote:
> The bit that makes a dcbz instruction a dcbzl instruction was  
> declared as
> reserved in ppc32 ISAs. However, hardware simply ignores the bit,  
> making
> code valid if it simply invokes dcbzl instead of dcbz even on 750 and  
> G4.
>
> Thus, mark the bit as unreserved so that we properly emulate a simple  
> dcbz
> in case we're running on non-G5s.

FWIW, dcbzl exists on e500mc, which is 32-bit.  If we ever support  
L1CSR0[DCBZ32] on e500mc, we'll need proper dcbzl support rather than  
just a dcbz alias.

-Scott