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authorShameer Kolothum <shameerali.kolothum.thodi@huawei.com>2018-02-13 15:20:50 +0000
committerJoerg Roedel <jroedel@suse.de>2018-02-14 15:15:41 +0100
commit8b4282e6b8e239d8ce68ab884c89335cc6fdd7c7 (patch)
tree782cac410eacd34f3a7ebcdb2ef448e7466babdb /drivers/irqchip
parent193e67c00e33e188d68815fb78806317c77f156c (diff)
ACPI/IORT: Add msi address regions reservation helper
On some platforms msi parent address regions have to be excluded from normal IOVA allocation in that they are detected and decoded in a HW specific way by system components and so they cannot be considered normal IOVA address space. Add a helper function that retrieves ITS address regions - the msi parent - through IORT device <-> ITS mappings and reserves it so that these regions will not be translated by IOMMU and will be excluded from IOVA allocations. The function checks for the smmu model number and only applies the msi reservation if the platform requires it. Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> [For the ITS part] Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic-v3-its.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 06f025fd5726..ab99d1bd7087 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -3450,7 +3450,8 @@ static int __init gic_acpi_parse_madt_its(struct acpi_subtable_header *header,
return -ENOMEM;
}
- err = iort_register_domain_token(its_entry->translation_id, dom_handle);
+ err = iort_register_domain_token(its_entry->translation_id, res.start,
+ dom_handle);
if (err) {
pr_err("ITS@%pa: Unable to register GICv3 ITS domain token (ITS ID %d) to IORT\n",
&res.start, its_entry->translation_id);