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Date: Wed, 10 May 2017 17:01:56 +0530 From: Geetha sowjanya <gakula@...iumnetworks.com> To: will.deacon@....com, robin.murphy@....com, lorenzo.pieralisi@....com, hanjun.guo@...aro.org, sudeep.holla@....com, iommu@...ts.linux-foundation.org Cc: jcm@...hat.com, linux-kernel@...r.kernel.org, robert.richter@...ium.com, catalin.marinas@....com, sgoutham@...ium.com, linux-arm-kernel@...ts.infradead.org, linux-acpi@...r.kernel.org, geethasowjanya.akula@...il.com, linu.cherian@...ium.com, Charles.Garcia-Tobin@....com, Geetha Sowjanya <geethasowjanya.akula@...ium.com> Subject: [v5 2/4] ACPI/IORT: Fixup SMMUv3 resource size for Cavium ThunderX2 SMMUv3 model From: Linu Cherian <linu.cherian@...ium.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@...ium.com> Signed-off-by: Geetha Sowjanya <geethasowjanya.akula@...ium.com> --- drivers/acpi/arm64/iort.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index c5fecf9..23c5350 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -833,12 +833,20 @@ static void __init arm_smmu_v3_init_resources(struct resource *res, { struct acpi_iort_smmu_v3 *smmu; int num_res = 0; + unsigned long size = SZ_128K; /* Retrieve SMMUv3 specific data */ smmu = (struct acpi_iort_smmu_v3 *)node->node_data; + /* + * 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) + size = SZ_64K; + res[num_res].start = smmu->base_address; - res[num_res].end = smmu->base_address + SZ_128K - 1; + res[num_res].end = smmu->base_address + size - 1; res[num_res].flags = IORESOURCE_MEM; num_res++; -- 1.8.3.1
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