Re: [Xen-devel] [PATCH 11/11] xen/arm: Limit the scope of cpregs.h

[Bhupinder Thakur <bhupinder.thakur@xxxxxxxxxx>]

Hi Julien,

On 11 August 2017 at 23:32, Julien Grall <julien.grall@xxxxxxx> wrote:
> Currently, cpregs.h is included in pretty much every files even for
> arm64. However, the only use for arm64 is when emulating co-processors.
>
> For arm32, cpregs.h rely on the presence of processor.h (define
> *_SYSREG helpers). So move the inclusion in asm-arm/arm32/processor.h.
>
Should it say that processor.h relies on cpregs.h instead of the other
way round because processor.h
includes cpregs.h?

> cpregs.h will also be directly included in the co-processors emulation
> to accomodate arm64.
>
> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
> ---
>  xen/arch/arm/smp.c                    | 1 -
>  xen/arch/arm/vcpreg.c                 | 1 +
>  xen/arch/arm/vgic-v3.c                | 1 +
>  xen/arch/arm/vtimer.c                 | 2 ++
>  xen/include/asm-arm/arm32/processor.h | 2 ++
>  xen/include/asm-arm/percpu.h          | 1 -
>  xen/include/asm-arm/processor.h       | 1 -
>  7 files changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/xen/arch/arm/smp.c b/xen/arch/arm/smp.c
> index e7df0874d6..554f4992e6 100644
> --- a/xen/arch/arm/smp.c
> +++ b/xen/arch/arm/smp.c
> @@ -1,6 +1,5 @@
>  #include <asm/system.h>
>  #include <asm/smp.h>
> -#include <asm/cpregs.h>
>  #include <asm/page.h>
>  #include <asm/gic.h>
>  #include <asm/flushtlb.h>
> diff --git a/xen/arch/arm/vcpreg.c b/xen/arch/arm/vcpreg.c
> index f3b08403fb..e363183ba8 100644
> --- a/xen/arch/arm/vcpreg.c
> +++ b/xen/arch/arm/vcpreg.c
> @@ -18,6 +18,7 @@
>
>  #include <xen/sched.h>
>
> +#include <asm/cpregs.h>
>  #include <asm/current.h>
>  #include <asm/regs.h>
>  #include <asm/traps.h>
> diff --git a/xen/arch/arm/vgic-v3.c b/xen/arch/arm/vgic-v3.c
> index cbeac28b28..a0cf993d13 100644
> --- a/xen/arch/arm/vgic-v3.c
> +++ b/xen/arch/arm/vgic-v3.c
> @@ -26,6 +26,7 @@
>  #include <xen/softirq.h>
>  #include <xen/sizes.h>
>
> +#include <asm/cpregs.h>
>  #include <asm/current.h>
>  #include <asm/gic_v3_defs.h>
>  #include <asm/gic_v3_its.h>
> diff --git a/xen/arch/arm/vtimer.c b/xen/arch/arm/vtimer.c
> index 9c7e8f441c..0460962f08 100644
> --- a/xen/arch/arm/vtimer.c
> +++ b/xen/arch/arm/vtimer.c
> @@ -22,6 +22,7 @@
>  #include <xen/sched.h>
>  #include <xen/timer.h>
>
> +#include <asm/cpregs.h>
>  #include <asm/div64.h>
>  #include <asm/gic.h>
>  #include <asm/irq.h>
> @@ -29,6 +30,7 @@
>  #include <asm/time.h>
>  #include <asm/vgic.h>
>  #include <asm/vreg.h>
> +#include <asm/regs.h>
>
>  /*
>   * Check if regs is allowed access, user_gate is tail end of a
> diff --git a/xen/include/asm-arm/arm32/processor.h 
> b/xen/include/asm-arm/arm32/processor.h
> index 68cc82147e..fb330812af 100644
> --- a/xen/include/asm-arm/arm32/processor.h
> +++ b/xen/include/asm-arm/arm32/processor.h
> @@ -1,6 +1,8 @@
>  #ifndef __ASM_ARM_ARM32_PROCESSOR_H
>  #define __ASM_ARM_ARM32_PROCESSOR_H
>
> +#include <asm/cpregs.h>
> +
>  #define ACTLR_CAXX_SMP      (1<<6)
>
>  #ifndef __ASSEMBLY__
> diff --git a/xen/include/asm-arm/percpu.h b/xen/include/asm-arm/percpu.h
> index 7968532462..cdf64e0f77 100644
> --- a/xen/include/asm-arm/percpu.h
> +++ b/xen/include/asm-arm/percpu.h
> @@ -4,7 +4,6 @@
>  #ifndef __ASSEMBLY__
>
>  #include <xen/types.h>
> -#include <asm/cpregs.h>
>  #if defined(CONFIG_ARM_32)
>  # include <asm/arm32/processor.h>
>  #elif defined(CONFIG_ARM_64)
> diff --git a/xen/include/asm-arm/processor.h b/xen/include/asm-arm/processor.h
> index 9eacb1be29..51ce802063 100644
> --- a/xen/include/asm-arm/processor.h
> +++ b/xen/include/asm-arm/processor.h
> @@ -1,7 +1,6 @@
>  #ifndef __ASM_ARM_PROCESSOR_H
>  #define __ASM_ARM_PROCESSOR_H
>
> -#include <asm/cpregs.h>
>  #ifndef __ASSEMBLY__
>  #include <xen/types.h>
>  #endif
> --
> 2.11.0
>

Regards,
Bhupinder

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