Re: [PATCH V1 3/3] x86/hyperv: Implement root VM IOMMU kernel only driver

[Easwar Hariharan]

On 9/28/2026 06:38, Jason Gunthorpe wrote:
>> [ ... 103 lines skipped ... ]
>> +/*

<snip>

> 
>> +
>> +static void hv_iommu_get_resv_regions(struct device *dev,
>> +				      struct list_head *head)
>> +{
>> +	struct iommu_resv_region *reg;
>> +
>> +	/* reserve the entire LAPIC region */
>> +	reg = iommu_alloc_resv_region(0xfee00000, SZ_1M, 0, IOMMU_RESV_MSI,
>> +				      GFP_KERNEL);
> 
> There was some discussion to make a helper for this, I don't see it
> merged yet..
> <snip>

Hi Jason,

That's patch 3 of the Hyper-V guest IOMMU driver series here:

https://lore.kernel.org/all/20260904075512.174154-1-zhangyu1@xxxxxxxxxxxxxxxxxxx/T/#m248fd782be21c7fdb79c97b1764658e6c3c5f623

That's awaiting an ack from you and Joerg to be picked up for the next merge window or additional feedback
for the past couple of weeks.

Thanks,
Easwar (he/him)