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-rw-r--r--drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c16
-rw-r--r--drivers/iommu/arm/arm-smmu/arm-smmu.c16
-rw-r--r--drivers/iommu/iommu.c10
-rw-r--r--drivers/iommu/iommufd/vfio_compat.c7
-rw-r--r--drivers/vfio/vfio_iommu_type1.c12
-rw-r--r--include/linux/iommu.h3
-rw-r--r--include/uapi/linux/vfio.h2
7 files changed, 3 insertions, 63 deletions
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 737c5b882355..acf250aeb18b 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -3378,21 +3378,6 @@ static struct iommu_group *arm_smmu_device_group(struct device *dev)
return group;
}
-static int arm_smmu_enable_nesting(struct iommu_domain *domain)
-{
- struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
- int ret = 0;
-
- mutex_lock(&smmu_domain->init_mutex);
- if (smmu_domain->smmu)
- ret = -EPERM;
- else
- smmu_domain->stage = ARM_SMMU_DOMAIN_S2;
- mutex_unlock(&smmu_domain->init_mutex);
-
- return ret;
-}
-
static int arm_smmu_of_xlate(struct device *dev,
const struct of_phandle_args *args)
{
@@ -3514,7 +3499,6 @@ static struct iommu_ops arm_smmu_ops = {
.flush_iotlb_all = arm_smmu_flush_iotlb_all,
.iotlb_sync = arm_smmu_iotlb_sync,
.iova_to_phys = arm_smmu_iova_to_phys,
- .enable_nesting = arm_smmu_enable_nesting,
.free = arm_smmu_domain_free_paging,
}
};
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index 8321962b3714..12b173eec454 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -1558,21 +1558,6 @@ static struct iommu_group *arm_smmu_device_group(struct device *dev)
return group;
}
-static int arm_smmu_enable_nesting(struct iommu_domain *domain)
-{
- struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
- int ret = 0;
-
- mutex_lock(&smmu_domain->init_mutex);
- if (smmu_domain->smmu)
- ret = -EPERM;
- else
- smmu_domain->stage = ARM_SMMU_DOMAIN_NESTED;
- mutex_unlock(&smmu_domain->init_mutex);
-
- return ret;
-}
-
static int arm_smmu_set_pgtable_quirks(struct iommu_domain *domain,
unsigned long quirks)
{
@@ -1656,7 +1641,6 @@ static struct iommu_ops arm_smmu_ops = {
.flush_iotlb_all = arm_smmu_flush_iotlb_all,
.iotlb_sync = arm_smmu_iotlb_sync,
.iova_to_phys = arm_smmu_iova_to_phys,
- .enable_nesting = arm_smmu_enable_nesting,
.set_pgtable_quirks = arm_smmu_set_pgtable_quirks,
.free = arm_smmu_domain_free,
}
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 83c8e617a2c5..dbd70d5a4702 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2723,16 +2723,6 @@ static int __init iommu_init(void)
}
core_initcall(iommu_init);
-int iommu_enable_nesting(struct iommu_domain *domain)
-{
- if (domain->type != IOMMU_DOMAIN_UNMANAGED)
- return -EINVAL;
- if (!domain->ops->enable_nesting)
- return -EINVAL;
- return domain->ops->enable_nesting(domain);
-}
-EXPORT_SYMBOL_GPL(iommu_enable_nesting);
-
int iommu_set_pgtable_quirks(struct iommu_domain *domain,
unsigned long quirk)
{
diff --git a/drivers/iommu/iommufd/vfio_compat.c b/drivers/iommu/iommufd/vfio_compat.c
index a3ad5f0b6c59..514aacd64009 100644
--- a/drivers/iommu/iommufd/vfio_compat.c
+++ b/drivers/iommu/iommufd/vfio_compat.c
@@ -291,12 +291,7 @@ static int iommufd_vfio_check_extension(struct iommufd_ctx *ictx,
case VFIO_DMA_CC_IOMMU:
return iommufd_vfio_cc_iommu(ictx);
- /*
- * This is obsolete, and to be removed from VFIO. It was an incomplete
- * idea that got merged.
- * https://lore.kernel.org/kvm/0-v1-0093c9b0e345+19-vfio_no_nesting_jgg@nvidia.com/
- */
- case VFIO_TYPE1_NESTING_IOMMU:
+ case __VFIO_RESERVED_TYPE1_NESTING_IOMMU:
return 0;
/*
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index bf391b40e576..50ebc9593c9d 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -72,7 +72,6 @@ struct vfio_iommu {
uint64_t pgsize_bitmap;
uint64_t num_non_pinned_groups;
bool v2;
- bool nesting;
bool dirty_page_tracking;
struct list_head emulated_iommu_groups;
};
@@ -2195,12 +2194,6 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
goto out_free_domain;
}
- if (iommu->nesting) {
- ret = iommu_enable_nesting(domain->domain);
- if (ret)
- goto out_domain;
- }
-
ret = iommu_attach_group(domain->domain, group->iommu_group);
if (ret)
goto out_domain;
@@ -2541,9 +2534,7 @@ static void *vfio_iommu_type1_open(unsigned long arg)
switch (arg) {
case VFIO_TYPE1_IOMMU:
break;
- case VFIO_TYPE1_NESTING_IOMMU:
- iommu->nesting = true;
- fallthrough;
+ case __VFIO_RESERVED_TYPE1_NESTING_IOMMU:
case VFIO_TYPE1v2_IOMMU:
iommu->v2 = true;
break;
@@ -2638,7 +2629,6 @@ static int vfio_iommu_type1_check_extension(struct vfio_iommu *iommu,
switch (arg) {
case VFIO_TYPE1_IOMMU:
case VFIO_TYPE1v2_IOMMU:
- case VFIO_TYPE1_NESTING_IOMMU:
case VFIO_UNMAP_ALL:
return 1;
case VFIO_UPDATE_VADDR:
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index bd722f473635..c88d18d2c928 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -635,7 +635,6 @@ struct iommu_ops {
* @enforce_cache_coherency: Prevent any kind of DMA from bypassing IOMMU_CACHE,
* including no-snoop TLPs on PCIe or other platform
* specific mechanisms.
- * @enable_nesting: Enable nesting
* @set_pgtable_quirks: Set io page table quirks (IO_PGTABLE_QUIRK_*)
* @free: Release the domain after use.
*/
@@ -663,7 +662,6 @@ struct iommu_domain_ops {
dma_addr_t iova);
bool (*enforce_cache_coherency)(struct iommu_domain *domain);
- int (*enable_nesting)(struct iommu_domain *domain);
int (*set_pgtable_quirks)(struct iommu_domain *domain,
unsigned long quirks);
@@ -844,7 +842,6 @@ extern void iommu_group_put(struct iommu_group *group);
extern int iommu_group_id(struct iommu_group *group);
extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
-int iommu_enable_nesting(struct iommu_domain *domain);
int iommu_set_pgtable_quirks(struct iommu_domain *domain,
unsigned long quirks);
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 2b68e6cdf190..c8dbf8219c4f 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -35,7 +35,7 @@
#define VFIO_EEH 5
/* Two-stage IOMMU */
-#define VFIO_TYPE1_NESTING_IOMMU 6 /* Implies v2 */
+#define __VFIO_RESERVED_TYPE1_NESTING_IOMMU 6 /* Implies v2 */
#define VFIO_SPAPR_TCE_v2_IOMMU 7
generated by cgit v1.2.3 (git 2.39.0) at 2025-08-13 04:20:31 +0300