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Subject[v5 2/4] ACPI/IORT: Fixup SMMUv3 resource size for Cavium ThunderX2 SMMUv3 model
Date
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 | 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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