Hi Jacob,
On 11/19/19 6:56 PM, Jacob Pan wrote:
> After each setup for PASID entry, related translation caches must be
> flushed. We can combine duplicated code into one function which is less
> error prone.
>
> Signed-off-by: Jacob Pan <[email protected]>
> Reviewed-by: Lu Baolu <[email protected]>
> Acked-by: Lu Baolu <[email protected]>
I sent my R-b already on v2:
Reviewed-by: Eric Auger <[email protected]>
Eric
> ---
> drivers/iommu/intel-pasid.c | 48
> +++++++++++++++++----------------------------
> 1 file changed, 18 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/iommu/intel-pasid.c b/drivers/iommu/intel-pasid.c
> index e7cb0b8a7332..732bfee228df 100644
> --- a/drivers/iommu/intel-pasid.c
> +++ b/drivers/iommu/intel-pasid.c
> @@ -465,6 +465,21 @@ void intel_pasid_tear_down_entry(struct intel_iommu
> *iommu,
> devtlb_invalidation_with_pasid(iommu, dev, pasid);
> }
>
> +static void pasid_flush_caches(struct intel_iommu *iommu,
> + struct pasid_entry *pte,
> + int pasid, u16 did)
> +{
> + if (!ecap_coherent(iommu->ecap))
> + clflush_cache_range(pte, sizeof(*pte));
> +
> + if (cap_caching_mode(iommu->cap)) {
> + pasid_cache_invalidation_with_pasid(iommu, did, pasid);
> + iotlb_invalidation_with_pasid(iommu, did, pasid);
> + } else {
> + iommu_flush_write_buffer(iommu);
> + }
> +}
> +
> /*
> * Set up the scalable mode pasid table entry for first only
> * translation type.
> @@ -518,16 +533,7 @@ int intel_pasid_setup_first_level(struct intel_iommu
> *iommu,
> /* Setup Present and PASID Granular Transfer Type: */
> pasid_set_translation_type(pte, 1);
> pasid_set_present(pte);
> -
> - if (!ecap_coherent(iommu->ecap))
> - clflush_cache_range(pte, sizeof(*pte));
> -
> - if (cap_caching_mode(iommu->cap)) {
> - pasid_cache_invalidation_with_pasid(iommu, did, pasid);
> - iotlb_invalidation_with_pasid(iommu, did, pasid);
> - } else {
> - iommu_flush_write_buffer(iommu);
> - }
> + pasid_flush_caches(iommu, pte, pasid, did);
>
> return 0;
> }
> @@ -591,16 +597,7 @@ int intel_pasid_setup_second_level(struct intel_iommu
> *iommu,
> */
> pasid_set_sre(pte);
> pasid_set_present(pte);
> -
> - if (!ecap_coherent(iommu->ecap))
> - clflush_cache_range(pte, sizeof(*pte));
> -
> - if (cap_caching_mode(iommu->cap)) {
> - pasid_cache_invalidation_with_pasid(iommu, did, pasid);
> - iotlb_invalidation_with_pasid(iommu, did, pasid);
> - } else {
> - iommu_flush_write_buffer(iommu);
> - }
> + pasid_flush_caches(iommu, pte, pasid, did);
>
> return 0;
> }
> @@ -634,16 +631,7 @@ int intel_pasid_setup_pass_through(struct intel_iommu
> *iommu,
> */
> pasid_set_sre(pte);
> pasid_set_present(pte);
> -
> - if (!ecap_coherent(iommu->ecap))
> - clflush_cache_range(pte, sizeof(*pte));
> -
> - if (cap_caching_mode(iommu->cap)) {
> - pasid_cache_invalidation_with_pasid(iommu, did, pasid);
> - iotlb_invalidation_with_pasid(iommu, did, pasid);
> - } else {
> - iommu_flush_write_buffer(iommu);
> - }
> + pasid_flush_caches(iommu, pte, pasid, did);
>
> return 0;
> }
>
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