Messages in this thread | | | Date | Tue, 20 Jun 2017 20:27:47 +0100 | From | Lorenzo Pieralisi <> | Subject | Re: [PATCH v8 1/3] ACPI/IORT: Fixup SMMUv3 resource size for Cavium ThunderX2 SMMUv3 model |
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On Tue, Jun 20, 2017 at 07:47:37PM +0530, Geetha sowjanya wrote: > From: Linu Cherian <linu.cherian@cavium.com> > > Cavium ThunderX2 implementation doesn't support second page in SMMU > register space. Hence, resource size is set as 64k for this model. > > Signed-off-by: Linu Cherian <linu.cherian@cavium.com> > Signed-off-by: Geetha Sowjanya <geethasowjanya.akula@cavium.com> > --- > drivers/acpi/arm64/iort.c | 15 ++++++++++++++- > 1 files changed, 14 insertions(+), 1 deletions(-)
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c > index c5fecf9..c166f3e 100644 > --- a/drivers/acpi/arm64/iort.c > +++ b/drivers/acpi/arm64/iort.c > @@ -828,6 +828,18 @@ static int __init arm_smmu_v3_count_resources(struct acpi_iort_node *node) > return num_res; > } > > +static unsigned long arm_smmu_v3_resource_size(struct acpi_iort_smmu_v3 *smmu) > +{ > + /* > + * Override the size, for Cavium ThunderX2 implementation > + * which doesn't support the page 1 SMMU register space. > + */ > + if (smmu->model == ACPI_IORT_SMMU_V3_CAVIUM_CN99XX) > + return SZ_64K; > + > + return SZ_128K; > +} > + > static void __init arm_smmu_v3_init_resources(struct resource *res, > struct acpi_iort_node *node) > { > @@ -838,7 +850,8 @@ static void __init arm_smmu_v3_init_resources(struct resource *res, > smmu = (struct acpi_iort_smmu_v3 *)node->node_data; > > res[num_res].start = smmu->base_address; > - res[num_res].end = smmu->base_address + SZ_128K - 1; > + res[num_res].end = smmu->base_address + > + arm_smmu_v3_resource_size(smmu) - 1; > res[num_res].flags = IORESOURCE_MEM; > > num_res++; > -- > 1.7.1 >
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