Re: next-20250702 WARNING iommu io-pgtable-arm.c at arm_lpae_map_pages qcom_iommu_map

On Wed, 9 Jul 2025 at 21:56, Jason Gunthorpe jgg@nvidia.com wrote:

On Wed, Jul 09, 2025 at 04:14:26PM +0530, Naresh Kamboju wrote:

...

I have tested this patch on top of Linux next-20250702 tag, and found kernel warning,

Oh, yeah, I guess that hacky fix is not going to work.

Then this is probably good enough (against linux-next):

--- a/drivers/iommu/arm/arm-smmu/qcom_iommu.c +++ b/drivers/iommu/arm/arm-smmu/qcom_iommu.c @@ -335,7 +335,7 @@ static struct iommu_domain *qcom_iommu_domain_alloc_paging(struct device *dev)

    mutex_init(&qcom_domain->init_mutex);
    spin_lock_init(&qcom_domain->pgtbl_lock);

•   qcom_domain->domain.pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M;
  

•   qcom_domain->domain.pgsize_bitmap = SZ_4K | SZ_2M;
  
    return &qcom_domain->domain;
  

}

I have tested the above patch and it fixes the reported issue.

Tested-by: Linux Kernel Functional Testing lkft@linaro.org

* https://lkft.validation.linaro.org/scheduler/job/8351756#L2565

-- Linaro LKFT https://lkft.linaro.org