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iommu/s390: set appropriate IOTA region type

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When registering the I/O Translation Anchor, use the current table type
stored in the s390_domain to set the appropriate region type
indication.  For the moment, the table type will always be stored as
region third.

Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Link: https://lore.kernel.org/r/20250411202433.181683-2-mjrosato@linux.ibm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Matthew Rosato 2025-04-11 16:24:29 -04:00 committed by Joerg Roedel
parent 8ffd015db8
commit 83c1aec210
1 changed files with 18 additions and 1 deletions
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19
drivers/iommu/s390-iommu.c
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@ -31,6 +31,7 @@ struct s390_domain {
unsigned long *dma_table;
spinlock_t list_lock;
struct rcu_head rcu;
u8 origin_type;
};
static struct iommu_domain blocking_domain;
@ -345,6 +346,7 @@ static struct iommu_domain *s390_domain_alloc_paging(struct device *dev)
s390_domain->domain.geometry.force_aperture = true;
s390_domain->domain.geometry.aperture_start = 0;
s390_domain->domain.geometry.aperture_end = ZPCI_TABLE_SIZE_RT - 1;
s390_domain->origin_type = ZPCI_TABLE_TYPE_RTX;
spin_lock_init(&s390_domain->list_lock);
INIT_LIST_HEAD_RCU(&s390_domain->devices);
@ -381,6 +383,21 @@ static void zdev_s390_domain_update(struct zpci_dev *zdev,
spin_unlock_irqrestore(&zdev->dom_lock, flags);
}
static u64 get_iota_region_flag(struct s390_domain *domain)
{
switch (domain->origin_type) {
case ZPCI_TABLE_TYPE_RTX:
return ZPCI_IOTA_RTTO_FLAG;
case ZPCI_TABLE_TYPE_RSX:
return ZPCI_IOTA_RSTO_FLAG;
case ZPCI_TABLE_TYPE_RFX:
return ZPCI_IOTA_RFTO_FLAG;
default:
WARN_ONCE(1, "Invalid IOMMU table (%x)\n", domain->origin_type);
return 0;
}
}
static int s390_iommu_domain_reg_ioat(struct zpci_dev *zdev,
struct iommu_domain *domain, u8 *status)
{
@ -399,7 +416,7 @@ static int s390_iommu_domain_reg_ioat(struct zpci_dev *zdev,
default:
s390_domain = to_s390_domain(domain);
iota = virt_to_phys(s390_domain->dma_table) |
ZPCI_IOTA_RTTO_FLAG;
get_iota_region_flag(s390_domain);
rc = zpci_register_ioat(zdev, 0, zdev->start_dma,
zdev->end_dma, iota, status);
}