[PATCH v3 1/3] powerpc/pseries: Update SCM hcall op-codes in hvcall.h

[Michael Ellerman]

Vaibhav Jain <vaibhav at linux.ibm.com> writes:
> Update the hvcalls.h to include op-codes for new hcalls introduce to
> manage SCM memory. Also update existing hcall definitions to reflect
> current papr specification for SCM.
>
> Signed-off-by: Vaibhav Jain <vaibhav at linux.ibm.com>
> ---
> Change-log:
>
> v3:
> * Added updated opcode for H_SCM_HEALTH [Oliver]
>
> v2:
> * None new patch in this series.
> ---
>  arch/powerpc/include/asm/hvcall.h | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h
> index 463c63a9fcf1..11112023e327 100644
> --- a/arch/powerpc/include/asm/hvcall.h
> +++ b/arch/powerpc/include/asm/hvcall.h
> @@ -302,9 +302,14 @@
>  #define H_SCM_UNBIND_MEM        0x3F0
>  #define H_SCM_QUERY_BLOCK_MEM_BINDING 0x3F4
>  #define H_SCM_QUERY_LOGICAL_MEM_BINDING 0x3F8
> -#define H_SCM_MEM_QUERY	        0x3FC
> -#define H_SCM_BLOCK_CLEAR       0x400
> -#define MAX_HCALL_OPCODE	H_SCM_BLOCK_CLEAR
> +#define H_SCM_UNBIND_ALL        0x3FC
> +#define H_SCM_HEALTH            0x400
> +#define H_SCM_PERFORMANCE_STATS 0x418
> +#define MAX_HCALL_OPCODE	H_SCM_PERFORMANCE_STATS

How can we be changing the meaning of HCALL numbers without breaking all
existing usages?

Where are these hypervisor calls documented?

cheers