Re: [RFC v1 1/5] PCI: hv: Create and export hv_build_logical_dev_id()

Easwar Hariharan
2025-12-10T17:03:22Z

On 12/8/2025 9:21 PM, Randy Dunlap wrote:
> Hi--
>
> On 12/8/25 9:11 PM, Yu Zhang wrote:
>> From: Easwar Hariharan <easwar.hariharan@linux.microsoft.com>
>>
>> Hyper-V uses a logical device ID to identify a PCI endpoint device for
>> child partitions. This ID will also be required for future hypercalls
>> used by the Hyper-V IOMMU driver.
>>
>> Refactor the logic for building this logical device ID into a standalone
>> helper function and export the interface for wider use.
>>
>> Signed-off-by: Easwar Hariharan <easwar.hariharan@linux.microsoft.com>
>> Signed-off-by: Yu Zhang <zhangyu1@linux.microsoft.com>
>> ---
>> drivers/pci/controller/pci-hyperv.c | 28 ++++++++++++++++++++--------
>> include/asm-generic/mshyperv.h | 2 ++
>> 2 files changed, 22 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
>> index 146b43981b27..4b82e06b5d93 100644
>> --- a/drivers/pci/controller/pci-hyperv.c
>> +++ b/drivers/pci/controller/pci-hyperv.c
>> @@ -598,15 +598,31 @@ static unsigned int hv_msi_get_int_vector(struct irq_data *data)
>>
>> #define hv_msi_prepare pci_msi_prepare
>>
>> +/**
>> + * Build a "Device Logical ID" out of this PCI bus's instance GUID and the
>> + * function number of the device.
>> + */
>
> Don't use kernel-doc notation "/**" unless you are using kernel-doc comments.
> You could just convert it to a kernel-doc style comment...

Thank you for the review, I will fix in a future revision.

Thanks,
Easwar (he/him)