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Re: [Qemu-ppc] [PATCH] spapr: Add ibm, processor-storage-keys property t

From: David Gibson
Subject: Re: [Qemu-ppc] [PATCH] spapr: Add ibm, processor-storage-keys property to CPU DT node
Date: Tue, 29 Aug 2017 11:40:30 +1000
User-agent: Mutt/1.8.3 (2017-05-23)

On Mon, Aug 28, 2017 at 10:53:56AM -0700, Ram Pai wrote:
> On Thu, Aug 24, 2017 at 12:54:48PM +1000, Paul Mackerras wrote:
> > 
> > We could either have two u16 fields for the number of keys for data
> > and instruction, or we could have a u32 field for the number of keys
> > and a separate bit in the flags field to indicate that instruction
> > keys are supported.  Which would be preferable?
> the second choice is more confusion-proof; to me atleast.
> The first choice gives a illusion that there are 'x' number of data keys
> and 'y' number of instruction keys; which is not exactly true.

Ah.. can you elaborate?

David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!

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