Messages in this thread | | | From | Sunil Kovvuri <> | Date | Thu, 20 Apr 2017 09:50:23 +0530 | Subject | Re: [PATCH] iommu/arm-smmu: Return IOVA in iova_to_phys when SMMU is bypassed |
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On Mon, Apr 17, 2017 at 5:27 PM, <sunil.kovvuri@gmail.com> wrote: > From: Sunil Goutham <sgoutham@cavium.com> > > For software initiated address translation, when domain type is > IOMMU_DOMAIN_IDENTITY i.e SMMU is bypassed, mimic HW behavior > i.e return the same IOVA as translated address. > > This patch is an extension to Will Deacon's patchset > "Implement SMMU passthrough using the default domain". > > Signed-off-by: Sunil Goutham <sgoutham@cavium.com> > --- > drivers/iommu/arm-smmu.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c > index 41afb07..2f4a130 100644 > --- a/drivers/iommu/arm-smmu.c > +++ b/drivers/iommu/arm-smmu.c > @@ -1405,6 +1405,9 @@ static phys_addr_t arm_smmu_iova_to_phys(struct iommu_domain *domain, > struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); > struct io_pgtable_ops *ops= smmu_domain->pgtbl_ops; > > + if (domain->type == IOMMU_DOMAIN_IDENTITY) > + return iova; > + > if (!ops) > return 0; > > -- > 2.7.4 >
Any comments or is this patch accepted ?
Thanks, Sunil.
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