If x >= PAGE_SIZE then:
1 << (get_order(x) + PAGE_SHIFT) == roundup_pow_two()
Inline this into the only caller, compute the size of the HW device table
in terms of 4K pages which matches the HW definition.
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
---
drivers/iommu/amd/init.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index fb3c3d17efc167..e3f4283ebbc201 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -245,14 +245,6 @@ static void init_translation_status(struct amd_iommu *iommu)
iommu->flags |= AMD_IOMMU_FLAG_TRANS_PRE_ENABLED;
}
-static inline unsigned long tbl_size(int entry_size, int last_bdf)
-{
- unsigned shift = PAGE_SHIFT +
- get_order((last_bdf + 1) * entry_size);
-
- return 1UL << shift;
-}
-
int amd_iommu_get_num_iommus(void)
{
return amd_iommus_present;
@@ -1603,7 +1595,9 @@ 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->dev_table_size =
+ max(roundup_pow_of_two((last_bdf + 1) * DEV_TABLE_ENTRY_SIZE),
+ SZ_4K);
pci_seg->id = id;
init_llist_head(&pci_seg->dev_data_list);
--
2.43.0
