Re: [PATCH v7 10/10] Drivers: hv: Enable Hyper-V code to be built on ARM64

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On Mon, 24 Aug 2020 at 18:48, Michael Kelley <mikelley@xxxxxxxxxxxxx> wrote:
>
> Update drivers/hv/Kconfig so CONFIG_HYPERV can be selected on
> ARM64, causing the Hyper-V specific code to be built.
>
> Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
> ---
>  drivers/hv/Kconfig | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
> index 79e5356..1113e49 100644
> --- a/drivers/hv/Kconfig
> +++ b/drivers/hv/Kconfig
> @@ -4,7 +4,8 @@ menu "Microsoft Hyper-V guest support"
>
>  config HYPERV
>         tristate "Microsoft Hyper-V client drivers"
> -       depends on X86 && ACPI && X86_LOCAL_APIC && HYPERVISOR_GUEST
> +       depends on ACPI && \
> +                       ((X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) || ARM64)
>         select PARAVIRT
>         select X86_HV_CALLBACK_VECTOR
>         help

Given the comment in a previous patch

+/*
+ * All data structures defined in the TLFS that are shared between Hyper-V
+ * and a guest VM use Little Endian byte ordering.  This matches the default
+ * byte ordering of Linux running on ARM64, so no special handling is required.
+ */

shouldn't this depend on !CONFIG_CPU_BIG_ENDIAN ?



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