On Fri, 09 Jul 2021 05:37:10 +0100,
Sergey Senozhatsky <[email protected]> wrote:
>
> Add the definitions of the SMCCC functions that will be
> used to paravirt VCPU state configuration.
>
> Signed-off-by: Sergey Senozhatsky <[email protected]>
> ---
> include/linux/arm-smccc.h | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
> index 7d1cabe15262..dbf0d658e54a 100644
> --- a/include/linux/arm-smccc.h
> +++ b/include/linux/arm-smccc.h
> @@ -177,6 +177,24 @@
> ARM_SMCCC_OWNER_STANDARD, \
> 0x53)
>
> +#define ARM_SMCCC_HV_PV_VCPU_STATE_FEATURES \
> + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
> + ARM_SMCCC_SMC_64, \
> + ARM_SMCCC_OWNER_STANDARD_HYP, \
> + 0x60)
> +
> +#define ARM_SMCCC_HV_PV_VCPU_STATE_INIT \
> + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
> + ARM_SMCCC_SMC_64, \
> + ARM_SMCCC_OWNER_STANDARD_HYP, \
> + 0x61)
> +
> +#define ARM_SMCCC_HV_PV_VCPU_STATE_RELEASE \
> + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
> + ARM_SMCCC_SMC_64, \
> + ARM_SMCCC_OWNER_STANDARD_HYP, \
> + 0x62)
> +
This is definitely the *wrong* namespace for this. The "STANDARD_HYP"
space is owned by ARM for hypercalls that are implementable by any
hypervisors, and for which there is an ARM-owned specification.
Unless you plan to get this adopted as an ARM spec (pretty doubtful),
this should go instead in the KVM-specific space, which currently has
a single user (the PTP stuff), although I plan to add a couple more
shortly.
M.
--
Without deviation from the norm, progress is not possible.
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