iommu/ipmmu-vmsa: Define driver-specific page directory sizes

The PTRS_PER_(PUD|PGD|PMD|PTE) macros evaluate to different values
depending on whether LPAE is enabled. The IPMMU driver uses a long
descriptor format regardless of LPAE, making those macros mismatch the
IPMMU configuration on non-LPAE systems.

Replace the macros by driver-specific versions that always evaluate to
the right value.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index 0fd322dcb4eb53b0bdf0c586ba65fe5d583a26a5..f8f5b194a3600df916d653a450d5ff71deeacdc3 100644 (file)
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -209,6 +209,11 @@ static LIST_HEAD(ipmmu_devices);
 #define ARM_VMSA_PTE_MEMATTR_NC                (((pteval_t)0x5) << 2)
 #define ARM_VMSA_PTE_MEMATTR_DEV       (((pteval_t)0x1) << 2)
 
+#define IPMMU_PTRS_PER_PTE             512
+#define IPMMU_PTRS_PER_PMD             512
+#define IPMMU_PTRS_PER_PGD             4
+#define IPMMU_PTRS_PER_PUD             1
+
 /* -----------------------------------------------------------------------------
  * Read/Write Access
  */
@@ -327,7 +332,7 @@ static int ipmmu_domain_init_context(struct ipmmu_vmsa_domain *domain)
 
        /* TTBR0 */
        ipmmu_flush_pgtable(domain->mmu, domain->pgd,
-                           PTRS_PER_PGD * sizeof(*domain->pgd));
+                           IPMMU_PTRS_PER_PGD * sizeof(*domain->pgd));
        ttbr = __pa(domain->pgd);
        ipmmu_ctx_write(domain, IMTTLBR0, ttbr);
        ipmmu_ctx_write(domain, IMTTUBR0, ttbr >> 32);
@@ -469,7 +474,7 @@ static void ipmmu_free_pmds(pud_t *pud)
        unsigned int i;
 
        pmd = pmd_base;
-       for (i = 0; i < PTRS_PER_PMD; ++i) {
+       for (i = 0; i < IPMMU_PTRS_PER_PMD; ++i) {
                if (pmd_none(*pmd))
                        continue;
 
@@ -486,7 +491,7 @@ static void ipmmu_free_puds(pgd_t *pgd)
        unsigned int i;
 
        pud = pud_base;
-       for (i = 0; i < PTRS_PER_PUD; ++i) {
+       for (i = 0; i < IPMMU_PTRS_PER_PUD; ++i) {
                if (pud_none(*pud))
                        continue;
 
@@ -509,7 +514,7 @@ static void ipmmu_free_pgtables(struct ipmmu_vmsa_domain *domain)
         * tables.
         */
        pgd = pgd_base;
-       for (i = 0; i < PTRS_PER_PGD; ++i) {
+       for (i = 0; i < IPMMU_PTRS_PER_PGD; ++i) {
                if (pgd_none(*pgd))
                        continue;
                ipmmu_free_puds(pgd);
@@ -694,7 +699,7 @@ static int ipmmu_domain_init(struct iommu_domain *io_domain)
 
        spin_lock_init(&domain->lock);
 
-       domain->pgd = kzalloc(PTRS_PER_PGD * sizeof(pgd_t), GFP_KERNEL);
+       domain->pgd = kzalloc(IPMMU_PTRS_PER_PGD * sizeof(pgd_t), GFP_KERNEL);
        if (!domain->pgd) {
                kfree(domain);
                return -ENOMEM;