Re: [Xen-devel] [PATCH 31/45] xen: arm: guest context switching.

[Tim Deegan <tim@xxxxxxx>]

At 15:56 +0000 on 23 Jan (1358956597), Ian Campbell wrote:
> One side effect of this is that we now save the full 64-bit
> TTBR[0,1] even on a 32-bit hypervisor. This is needed anyway to
> support LPAE guests (although this patch doesn't implement anything
> other than the context switch).
> 
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> ---
>  xen/arch/arm/domain.c        |  113 
> +++++++++++++++++++++++++-----------------
>  xen/arch/arm/traps.c         |   14 +++---
>  xen/include/asm-arm/cpregs.h |   21 +++++++-
>  xen/include/asm-arm/domain.h |   29 ++++++++---
>  4 files changed, 115 insertions(+), 62 deletions(-)
> 
> diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
> index 077521e..0323552 100644
> --- a/xen/arch/arm/domain.c
> +++ b/xen/arch/arm/domain.c
> @@ -41,55 +41,67 @@ void idle_loop(void)
>  static void ctxt_switch_from(struct vcpu *p)
>  {
>      /* CP 15 */
> -    p->arch.csselr = READ_CP32(CSSELR);
> +    p->arch.csselr = READ_SYSREG(CSSELR_EL1);
>  
>      /* Control Registers */
> -    p->arch.actlr = READ_CP32(ACTLR);
> -    p->arch.sctlr = READ_CP32(SCTLR);
> -    p->arch.cpacr = READ_CP32(CPACR);
> +    p->arch.actlr = READ_SYSREG(ACTLR_EL1);
> +    p->arch.sctlr = READ_SYSREG(SCTLR_EL1);
> +    p->arch.cpacr = READ_SYSREG(CPACR_EL1);
>  
> -    p->arch.contextidr = READ_CP32(CONTEXTIDR);
> -    p->arch.tpidrurw = READ_CP32(TPIDRURW);
> -    p->arch.tpidruro = READ_CP32(TPIDRURO);
> -    p->arch.tpidrprw = READ_CP32(TPIDRPRW);
> +    p->arch.contextidr = READ_SYSREG(CONTEXTIDR_EL1);
> +    p->arch.tpidrurw = READ_SYSREG(TPIDR_EL0); /* XXX names */

XXX names indeed. :)  Otherwise:

Acked-by: Tim Deegan <tim@xxxxxxx>


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