Re: [kvmarm] [PATCH v4 09/14] KVM: ARM: Emulation framework and CP15 emulation

Peter Maydell
2012-11-19T15:27:27Z

On 19 November 2012 15:01, Will Deacon <will.deacon@arm.com> wrote:
> On Sat, Nov 10, 2012 at 03:43:13PM +0000, Christoffer Dall wrote:
>> +/*
>> + * A15-specific CP15 registers.
>> + * Important: Must be sorted ascending by CRn, CRM, Op1, Op2
>> + */
>> +static const struct coproc_reg a15_regs[] = {
>> + /* MPIDR: we use VMPIDR for guest access. */
>> + { CRn( 0), CRm( 0), Op1( 0), Op2( 5), is32,
>> + NULL, reset_mpidr, c0_MPIDR },
>> +
>> + /* SCTLR: swapped by interrupt.S. */
>> + { CRn( 1), CRm( 0), Op1( 0), Op2( 0), is32,
>> + NULL, reset_val, c1_SCTLR, 0x00C50078 },
>
> Why is the SCTLR included here as an A15-specific register?

Rusty might remember the exact answer, but probably because
the SCTLR reset value is IMPDEF.

-- PMM