Re: [Xen-devel] [PATCH 10/45] xen: arm: refactor co-pro and sysreg reg handling.

[Tim Deegan <tim@xxxxxxx>]

At 15:56 +0000 on 23 Jan (1358956576), Ian Campbell wrote:
> AArch64 has removed the concept of co-processors replacing them with a
> combination of specific instructions (cache and tlb flushes etc) and
> system registers (which are understood by name in the assembler).
> 
> However most system registers are equivalent to a particular AArch32
> co-pro register and can be used by generic code in the same way. Note
> that the names of the registers differ (often only slightly)
> 
> For consistency it would be better to use only set of names in the
> common code. Therefore move the {READ,WRITE}_CP{32,64} accessors into
> arm32/processor.h and provide {READ,WRITE}_SYSREG. Where the names
> differ #defines will be provided on 32-bit.
> 
> HSR_CPREG and friends are required even on 64-bit in order to decode
> traps from 32 bit guests.
> 
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

Acked-by: Tim Deegan <tim@xxxxxxx>

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