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iommu: io-pgtable-arm: add non-secure quirk 

The quirk causes the Non-Secure bit to be set in all page table entries.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Laurent Pinchart 2014-12-14 23:34:50 +02:00 committed by Will Deacon
parent fe4b991dcd
commit c896c132b0
2 changed files with 9 additions and 1 deletions
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7
drivers/iommu/io-pgtable-arm.c
View File

@ -82,11 +82,13 @@
#define ARM_LPAE_PTE_TYPE_TABLE 3
#define ARM_LPAE_PTE_TYPE_PAGE 3
#define ARM_LPAE_PTE_NSTABLE (((arm_lpae_iopte)1) << 63)
#define ARM_LPAE_PTE_XN (((arm_lpae_iopte)3) << 53)
#define ARM_LPAE_PTE_AF (((arm_lpae_iopte)1) << 10)
#define ARM_LPAE_PTE_SH_NS (((arm_lpae_iopte)0) << 8)
#define ARM_LPAE_PTE_SH_OS (((arm_lpae_iopte)2) << 8)
#define ARM_LPAE_PTE_SH_IS (((arm_lpae_iopte)3) << 8)
#define ARM_LPAE_PTE_NS (((arm_lpae_iopte)1) << 5)
#define ARM_LPAE_PTE_VALID (((arm_lpae_iopte)1) << 0)
#define ARM_LPAE_PTE_ATTR_LO_MASK (((arm_lpae_iopte)0x3ff) << 2)
@ -208,6 +210,9 @@ static int arm_lpae_init_pte(struct arm_lpae_io_pgtable *data,
return -EEXIST;
}
if (data->iop.cfg.quirks & IO_PGTABLE_QUIRK_ARM_NS)
pte |= ARM_LPAE_PTE_NS;
if (lvl == ARM_LPAE_MAX_LEVELS - 1)
pte |= ARM_LPAE_PTE_TYPE_PAGE;
else
@ -251,6 +256,8 @@ static int __arm_lpae_map(struct arm_lpae_io_pgtable *data, unsigned long iova,
data->iop.cfg.tlb->flush_pgtable(cptep, 1UL << data->pg_shift,
cookie);
pte = __pa(cptep) | ARM_LPAE_PTE_TYPE_TABLE;
if (data->iop.cfg.quirks & IO_PGTABLE_QUIRK_ARM_NS)
pte |= ARM_LPAE_PTE_NSTABLE;
*ptep = pte;
data->iop.cfg.tlb->flush_pgtable(ptep, sizeof(*ptep), cookie);
} else {

3
drivers/iommu/io-pgtable.h
View File

@ -43,7 +43,8 @@ struct iommu_gather_ops {
* @tlb: TLB management callbacks for this set of tables.
*/
struct io_pgtable_cfg {
int quirks; /* IO_PGTABLE_QUIRK_* */
#define IO_PGTABLE_QUIRK_ARM_NS (1 << 0) /* Set NS bit in PTEs */
int quirks;
unsigned long pgsize_bitmap;
unsigned int ias;
unsigned int oas;