[PATCH v7 10/10] Drivers: hv: Enable Hyper-V code to be built on ARM64
Ben Dooks
ben.dooks at codethink.co.uk
Tue Aug 25 04:47:00 EDT 2020
On 24/08/2020 18:24, Ard Biesheuvel wrote:
> On Mon, 24 Aug 2020 at 18:48, Michael Kelley <mikelley at microsoft.com> 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 at microsoft.com>
>> ---
>> 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 ?
or mark the data __le and have the appropriate accessor functions do
the swapping.
--
Ben Dooks http://www.codethink.co.uk/
Senior Engineer Codethink - Providing Genius
https://www.codethink.co.uk/privacy.html
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