Re: [Xen-devel] [PATCH v5 22/22] xen/arm64: Add ACPI support

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Fri, 4 Mar 2016, Shannon Zhao wrote:
> From: Naresh Bhat <naresh.bhat@xxxxxxxxxx>
> 
> Add ACPI support on arm64 xen hypervisor. Enable EFI support on ARM.
> 
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> Signed-off-by: Naresh Bhat <naresh.bhat@xxxxxxxxxx>
> Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>

Reviewed-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>


> v5: make ACPI selectable option
> ---
>  xen/arch/arm/Kconfig         |  9 +++++++++
>  xen/common/efi/runtime.c     | 12 +++++++-----
>  xen/include/asm-arm/config.h |  4 ++++
>  3 files changed, 20 insertions(+), 5 deletions(-)
> 
> diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
> index cb99df5..25cec31 100644
> --- a/xen/arch/arm/Kconfig
> +++ b/xen/arch/arm/Kconfig
> @@ -33,6 +33,15 @@ menu "Architecture Features"
>  
>  source "arch/Kconfig"
>  
> +config ACPI
> +     bool "ACPI (Advanced Configuration and Power Interface) Support"
> +     depends on ARM_64
> +     default y
> +     ---help---
> +
> +       Advanced Configuration and Power Interface (ACPI) support for Xen is
> +       an alternative to device tree on ARM64.
> +
>  # Select HAS_GICV3 if GICv3 is supported
>  config HAS_GICV3
>       bool
> diff --git a/xen/common/efi/runtime.c b/xen/common/efi/runtime.c
> index ae87557..c256814 100644
> --- a/xen/common/efi/runtime.c
> +++ b/xen/common/efi/runtime.c
> @@ -10,14 +10,16 @@ DEFINE_XEN_GUEST_HANDLE(CHAR16);
>  
>  #ifndef COMPAT
>  
> -#ifdef CONFIG_ARM  /* Disabled until runtime services implemented */
> -const bool_t efi_enabled = 0;
> -#else
> +/*
> + * Currently runtime services are not implemented on ARM. To boot Xen with 
> ACPI,
> + * set efi_enabled to 1, so that Xen can get the ACPI root pointer from EFI.
> + */
> +const bool_t efi_enabled = 1;
> +
> +#ifndef CONFIG_ARM
>  # include <asm/i387.h>
>  # include <asm/xstate.h>
>  # include <public/platform.h>
> -
> -const bool_t efi_enabled = 1;
>  #endif
>  
>  unsigned int __read_mostly efi_num_ct;
> diff --git a/xen/include/asm-arm/config.h b/xen/include/asm-arm/config.h
> index 7ceb5c5..5fc9aa2 100644
> --- a/xen/include/asm-arm/config.h
> +++ b/xen/include/asm-arm/config.h
> @@ -31,6 +31,10 @@
>  
>  #define CONFIG_ARM_L1_CACHE_SHIFT 7 /* XXX */
>  
> +#ifdef CONFIG_ACPI
> +#define CONFIG_ACPI_BOOT 1
> +#endif
> +
>  #define CONFIG_SMP 1
>  
>  #define CONFIG_IRQ_HAS_MULTIPLE_ACTION 1
> -- 
> 2.0.4
> 
> 

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