iommu/arm-smmu: Add support for slave side protection
For targets where we have no hypervisor, slave side protection mechanism
is used to provide buffer protection. Add functionality to make calls
into TZ for mapping/unmapping of buffers.
Change-Id: I845983a25b56ce1b34c90f91ac4a2cf6c4451813
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>
diff --git a/drivers/iommu/io-pgtable.h b/drivers/iommu/io-pgtable.h
index b35016e..2f5488c 100644
--- a/drivers/iommu/io-pgtable.h
+++ b/drivers/iommu/io-pgtable.h
@@ -3,6 +3,7 @@
#include <linux/bitops.h>
#include <linux/scatterlist.h>
+#include <soc/qcom/msm_tz_smmu.h>
/*
* Public API for use by IOMMU drivers
@@ -14,6 +15,7 @@
ARM_64_LPAE_S2,
ARM_V7S,
ARM_V8L_FAST,
+ ARM_MSM_SECURE,
IO_PGTABLE_NUM_FMTS,
};
@@ -128,6 +130,11 @@
u64 mair[2];
void *pmds;
} av8l_fast_cfg;
+
+ struct {
+ enum tz_smmu_device_id sec_id;
+ int cbndx;
+ } arm_msm_secure_cfg;
};
};
@@ -211,6 +218,8 @@
static inline void io_pgtable_tlb_flush_all(struct io_pgtable *iop)
{
+ if (!iop->cfg.tlb)
+ return;
iop->cfg.tlb->tlb_flush_all(iop->cookie);
iop->tlb_sync_pending = true;
}
@@ -218,12 +227,16 @@
static inline void io_pgtable_tlb_add_flush(struct io_pgtable *iop,
unsigned long iova, size_t size, size_t granule, bool leaf)
{
+ if (!iop->cfg.tlb)
+ return;
iop->cfg.tlb->tlb_add_flush(iova, size, granule, leaf, iop->cookie);
iop->tlb_sync_pending = true;
}
static inline void io_pgtable_tlb_sync(struct io_pgtable *iop)
{
+ if (!iop->cfg.tlb)
+ return;
if (iop->tlb_sync_pending) {
iop->cfg.tlb->tlb_sync(iop->cookie);
iop->tlb_sync_pending = false;
@@ -248,6 +261,7 @@
extern struct io_pgtable_init_fns io_pgtable_arm_64_lpae_s2_init_fns;
extern struct io_pgtable_init_fns io_pgtable_arm_v7s_init_fns;
extern struct io_pgtable_init_fns io_pgtable_av8l_fast_init_fns;
+extern struct io_pgtable_init_fns io_pgtable_arm_msm_secure_init_fns;
/**
* io_pgtable_alloc_pages_exact: