Re: [PATCH 3/6] mshv: Add the HVCALL_GET_PARTITION_PROPERTY_EX hypercall

[Nuno Das Neves <nunodasneves@linux.microsoft.com>]

On 9/5/2025 12:28 PM, Easwar Hariharan wrote:
> On 8/28/2025 5:43 PM, Nuno Das Neves wrote:
>> From: Purna Pavan Chandra Aekkaladevi <paekkaladevi@linux.microsoft.com>
>>
>> This hypercall can be used to fetch extended properties of a
>> partition. Extended properties are properties with values larger than
>> a u64. Some of these also need additional input arguments.
>>
>> Add helper function for using the hypercall in the mshv_root driver.
>>
>> Signed-off-by: Purna Pavan Chandra Aekkaladevi <paekkaladevi@linux.microsoft.com>
>> Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
>> ---
>>  drivers/hv/mshv_root.h         |  2 ++
>>  drivers/hv/mshv_root_hv_call.c | 31 ++++++++++++++++++++++++++
>>  include/hyperv/hvgdk_mini.h    |  1 +
>>  include/hyperv/hvhdk.h         | 40 ++++++++++++++++++++++++++++++++++
>>  include/hyperv/hvhdk_mini.h    | 26 ++++++++++++++++++++++
>>  5 files changed, 100 insertions(+)
>>
>> diff --git a/drivers/hv/mshv_root.h b/drivers/hv/mshv_root.h
>> index e3931b0f1269..4aeb03bea6b6 100644
>> --- a/drivers/hv/mshv_root.h
>> +++ b/drivers/hv/mshv_root.h
>> @@ -303,6 +303,8 @@ int hv_call_unmap_stat_page(enum hv_stats_object_type type,
>>  int hv_call_modify_spa_host_access(u64 partition_id, struct page **pages,
>>  				   u64 page_struct_count, u32 host_access,
>>  				   u32 flags, u8 acquire);
>> +int hv_call_get_partition_property_ex(u64 partition_id, u64 property_code, u64 arg,
>> +				      void *property_value, size_t property_value_sz);
>>  
>>  extern struct mshv_root mshv_root;
>>  extern enum hv_scheduler_type hv_scheduler_type;
>> diff --git a/drivers/hv/mshv_root_hv_call.c b/drivers/hv/mshv_root_hv_call.c
>> index 1c38576a673c..7589b1ff3515 100644
>> --- a/drivers/hv/mshv_root_hv_call.c
>> +++ b/drivers/hv/mshv_root_hv_call.c
>> @@ -590,6 +590,37 @@ int hv_call_unmap_vp_state_page(u64 partition_id, u32 vp_index, u32 type,
>>  	return hv_result_to_errno(status);
>>  }
>>  
>> +int
>> +hv_call_get_partition_property_ex(u64 partition_id, u64 property_code, u64 arg,
> 
> One line like in patch 2..

Ack, thanks> 
> <snip>
> 
> Thanks,
> Easwar (he/him)