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iommu/amd: Change rlookup, irq_lookup, and alias to use kvalloc()

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This is just CPU memory used by the driver to track things, it doesn't
need to use iommu-pages. All of them are indexed by devid and devid is
bounded by pci_seg->last_bdf or we are already out of bounds on the page
allocation.

Switch them to use some version of kvmalloc_array() and drop the now
unused constants and remove the tbl_size() round up to PAGE_SIZE multiples
logic.

Tested-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/16-v4-c8663abbb606+3f7-iommu_pages_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jason Gunthorpe
2025-04-08 13:54:04 -03:00
committed by Joerg Roedel
parent b3efacc451
commit e874c666b1
2 changed files with 12 additions and 22 deletions
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8
drivers/iommu/amd/amd_iommu_types.h
View File

@@ -29,8 +29,6 @@
* some size calculation constants
*/
#define DEV_TABLE_ENTRY_SIZE 32
#define ALIAS_TABLE_ENTRY_SIZE 2
#define RLOOKUP_TABLE_ENTRY_SIZE (sizeof(void *))
/* Capability offsets used by the driver */
#define MMIO_CAP_HDR_OFFSET 0x00
@@ -616,12 +614,6 @@ struct amd_iommu_pci_seg {
/* Size of the device table */
u32 dev_table_size;
/* Size of the alias table */
u32 alias_table_size;
/* Size of the rlookup table */
u32 rlookup_table_size;
/*
* device table virtual address
*

26
drivers/iommu/amd/init.c
View File

@@ -651,8 +651,9 @@ static inline void free_dev_table(struct amd_iommu_pci_seg *pci_seg)
/* Allocate per PCI segment IOMMU rlookup table. */
static inline int __init alloc_rlookup_table(struct amd_iommu_pci_seg *pci_seg)
{
pci_seg->rlookup_table = iommu_alloc_pages(GFP_KERNEL,
get_order(pci_seg->rlookup_table_size));
pci_seg->rlookup_table = kvcalloc(pci_seg->last_bdf + 1,
sizeof(*pci_seg->rlookup_table),
GFP_KERNEL);
if (pci_seg->rlookup_table == NULL)
return -ENOMEM;
@@ -661,16 +662,15 @@ static inline int __init alloc_rlookup_table(struct amd_iommu_pci_seg *pci_seg)
static inline void free_rlookup_table(struct amd_iommu_pci_seg *pci_seg)
{
iommu_free_pages(pci_seg->rlookup_table);
kvfree(pci_seg->rlookup_table);
pci_seg->rlookup_table = NULL;
}
static inline int __init alloc_irq_lookup_table(struct amd_iommu_pci_seg *pci_seg)
{
pci_seg->irq_lookup_table = iommu_alloc_pages(GFP_KERNEL,
get_order(pci_seg->rlookup_table_size));
kmemleak_alloc(pci_seg->irq_lookup_table,
pci_seg->rlookup_table_size, 1, GFP_KERNEL);
pci_seg->irq_lookup_table = kvcalloc(pci_seg->last_bdf + 1,
sizeof(*pci_seg->irq_lookup_table),
GFP_KERNEL);
if (pci_seg->irq_lookup_table == NULL)
return -ENOMEM;
@@ -679,8 +679,7 @@ static inline int __init alloc_irq_lookup_table(struct amd_iommu_pci_seg *pci_se
static inline void free_irq_lookup_table(struct amd_iommu_pci_seg *pci_seg)
{
kmemleak_free(pci_seg->irq_lookup_table);
iommu_free_pages(pci_seg->irq_lookup_table);
kvfree(pci_seg->irq_lookup_table);
pci_seg->irq_lookup_table = NULL;
}
@@ -688,8 +687,9 @@ static int __init alloc_alias_table(struct amd_iommu_pci_seg *pci_seg)
{
int i;
pci_seg->alias_table = iommu_alloc_pages(GFP_KERNEL,
get_order(pci_seg->alias_table_size));
pci_seg->alias_table = kvmalloc_array(pci_seg->last_bdf + 1,
sizeof(*pci_seg->alias_table),
GFP_KERNEL);
if (!pci_seg->alias_table)
return -ENOMEM;
@@ -704,7 +704,7 @@ static int __init alloc_alias_table(struct amd_iommu_pci_seg *pci_seg)
static void __init free_alias_table(struct amd_iommu_pci_seg *pci_seg)
{
iommu_free_pages(pci_seg->alias_table);
kvfree(pci_seg->alias_table);
pci_seg->alias_table = NULL;
}
@@ -1596,8 +1596,6 @@ static struct amd_iommu_pci_seg *__init alloc_pci_segment(u16 id,
pci_seg->last_bdf = last_bdf;
DUMP_printk("PCI segment : 0x%0x, last bdf : 0x%04x\n", id, last_bdf);
pci_seg->dev_table_size = tbl_size(DEV_TABLE_ENTRY_SIZE, last_bdf);
pci_seg->alias_table_size = tbl_size(ALIAS_TABLE_ENTRY_SIZE, last_bdf);
pci_seg->rlookup_table_size = tbl_size(RLOOKUP_TABLE_ENTRY_SIZE, last_bdf);
pci_seg->id = id;
init_llist_head(&pci_seg->dev_data_list);