ipmmu_domain_init_context() takes care of (1) initializing the software
domain, and (2) initializing the hardware context for the domain.
Extract the code to initialize the hardware context into a new subroutine
ipmmu_domain_setup_context(), to prepare for later reuse.
Signed-off-by: Geert Uytterhoeven
---
v2:
- s/ipmmu_context_init/ipmmu_domain_setup_context/.
---
drivers/iommu/ipmmu-vmsa.c | 91 --
1 file changed, 48 insertions(+), 43 deletions(-)
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index 3fa57627b1e35562..56e84bcc9532e1ce 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -404,52 +404,10 @@ static void ipmmu_domain_free_context(struct
ipmmu_vmsa_device *mmu,
spin_unlock_irqrestore(>lock, flags);
}
-static int ipmmu_domain_init_context(struct ipmmu_vmsa_domain *domain)
+static void ipmmu_domain_setup_context(struct ipmmu_vmsa_domain *domain)
{
u64 ttbr;
u32 tmp;
- int ret;
-
- /*
-* Allocate the page table operations.
-*
-* VMSA states in section B3.6.3 "Control of Secure or Non-secure memory
-* access, Long-descriptor format" that the NStable bit being set in a
-* table descriptor will result in the NStable and NS bits of all child
-* entries being ignored and considered as being set. The IPMMU seems
-* not to comply with this, as it generates a secure access page fault
-* if any of the NStable and NS bits isn't set when running in
-* non-secure mode.
-*/
- domain->cfg.quirks = IO_PGTABLE_QUIRK_ARM_NS;
- domain->cfg.pgsize_bitmap = SZ_1G | SZ_2M | SZ_4K;
- domain->cfg.ias = 32;
- domain->cfg.oas = 40;
- domain->cfg.tlb = _gather_ops;
- domain->io_domain.geometry.aperture_end = DMA_BIT_MASK(32);
- domain->io_domain.geometry.force_aperture = true;
- /*
-* TODO: Add support for coherent walk through CCI with DVM and remove
-* cache handling. For now, delegate it to the io-pgtable code.
-*/
- domain->cfg.iommu_dev = domain->mmu->root->dev;
-
- /*
-* Find an unused context.
-*/
- ret = ipmmu_domain_allocate_context(domain->mmu->root, domain);
- if (ret < 0)
- return ret;
-
- domain->context_id = ret;
-
- domain->iop = alloc_io_pgtable_ops(ARM_32_LPAE_S1, >cfg,
- domain);
- if (!domain->iop) {
- ipmmu_domain_free_context(domain->mmu->root,
- domain->context_id);
- return -EINVAL;
- }
/* TTBR0 */
ttbr = domain->cfg.arm_lpae_s1_cfg.ttbr[0];
@@ -495,7 +453,54 @@ static int ipmmu_domain_init_context(struct
ipmmu_vmsa_domain *domain)
*/
ipmmu_ctx_write_all(domain, IMCTR,
IMCTR_INTEN | IMCTR_FLUSH | IMCTR_MMUEN);
+}
+
+static int ipmmu_domain_init_context(struct ipmmu_vmsa_domain *domain)
+{
+ int ret;
+
+ /*
+* Allocate the page table operations.
+*
+* VMSA states in section B3.6.3 "Control of Secure or Non-secure memory
+* access, Long-descriptor format" that the NStable bit being set in a
+* table descriptor will result in the NStable and NS bits of all child
+* entries being ignored and considered as being set. The IPMMU seems
+* not to comply with this, as it generates a secure access page fault
+* if any of the NStable and NS bits isn't set when running in
+* non-secure mode.
+*/
+ domain->cfg.quirks = IO_PGTABLE_QUIRK_ARM_NS;
+ domain->cfg.pgsize_bitmap = SZ_1G | SZ_2M | SZ_4K;
+ domain->cfg.ias = 32;
+ domain->cfg.oas = 40;
+ domain->cfg.tlb = _gather_ops;
+ domain->io_domain.geometry.aperture_end = DMA_BIT_MASK(32);
+ domain->io_domain.geometry.force_aperture = true;
+ /*
+* TODO: Add support for coherent walk through CCI with DVM and remove
+* cache handling. For now, delegate it to the io-pgtable code.
+*/
+ domain->cfg.iommu_dev = domain->mmu->root->dev;
+
+ /*
+* Find an unused context.
+*/
+ ret = ipmmu_domain_allocate_context(domain->mmu->root, domain);
+ if (ret < 0)
+ return ret;
+
+ domain->context_id = ret;
+
+ domain->iop = alloc_io_pgtable_ops(ARM_32_LPAE_S1, >cfg,
+ domain);
+ if (!domain->iop) {
+ ipmmu_domain_free_context(domain->mmu->root,
+ domain->context_id);
+ return -EINVAL;
+ }
+ ipmmu_domain_setup_context(domain);
return 0;
}
--
2.17.1
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