[PATCH v1 3/3] target/microblaze: Add security attributes on memory transactions

[Joe Komlodi]

Using the cfg.use_non_secure bitfield and the MMU access type, we can determine
if the access should be secure or not.

Signed-off-by: Joe Komlodi <komlodi@xilinx.com>
---
 target/microblaze/cpu.c    |  2 +-
 target/microblaze/cpu.h    |  3 ++-
 target/microblaze/helper.c | 26 +++++++++++++++++++++++---
 3 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/target/microblaze/cpu.c b/target/microblaze/cpu.c
index accfb23..d5e8bfe 100644
--- a/target/microblaze/cpu.c
+++ b/target/microblaze/cpu.c
@@ -375,7 +375,7 @@ static void mb_cpu_class_init(ObjectClass *oc, void *data)
     cc->tlb_fill = mb_cpu_tlb_fill;
 #ifndef CONFIG_USER_ONLY
     cc->do_transaction_failed = mb_cpu_transaction_failed;
-    cc->get_phys_page_debug = mb_cpu_get_phys_page_debug;
+    cc->get_phys_page_attrs_debug = mb_cpu_get_phys_page_attrs_debug;
     dc->vmsd = &vmstate_mb_cpu;
 #endif
     device_class_set_props(dc, mb_properties);
diff --git a/target/microblaze/cpu.h b/target/microblaze/cpu.h
index 199cfb0..e4bba8a 100644
--- a/target/microblaze/cpu.h
+++ b/target/microblaze/cpu.h
@@ -361,7 +361,8 @@ void mb_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr,
                                 MMUAccessType access_type,
                                 int mmu_idx, uintptr_t retaddr);
 void mb_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
-hwaddr mb_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
+hwaddr mb_cpu_get_phys_page_attrs_debug(CPUState *cpu, vaddr addr,
+                                        MemTxAttrs *attrs);
 int mb_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
 int mb_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 
diff --git a/target/microblaze/helper.c b/target/microblaze/helper.c
index cda14a1..20dbd67 100644
--- a/target/microblaze/helper.c
+++ b/target/microblaze/helper.c
@@ -46,6 +46,16 @@ bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
 
 #else /* !CONFIG_USER_ONLY */
 
+static bool mb_cpu_access_is_secure(MicroBlazeCPU *cpu,
+                                    MMUAccessType access_type)
+{
+    if (access_type == MMU_INST_FETCH) {
+        return !cpu->ns_axi_ip;
+    } else {
+        return !cpu->ns_axi_dp;
+    }
+}
+
 bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
                      MMUAccessType access_type, int mmu_idx,
                      bool probe, uintptr_t retaddr)
@@ -55,12 +65,16 @@ bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
     MicroBlazeMMULookup lu;
     unsigned int hit;
     int prot;
+    MemTxAttrs attrs = {};
+
+    attrs.secure = mb_cpu_access_is_secure(cpu, access_type);
 
     if (mmu_idx == MMU_NOMMU_IDX) {
         /* MMU disabled or not available.  */
         address &= TARGET_PAGE_MASK;
         prot = PAGE_BITS;
-        tlb_set_page(cs, address, address, prot, mmu_idx, TARGET_PAGE_SIZE);
+        tlb_set_page_with_attrs(cs, address, address, attrs, prot, mmu_idx,
+                                TARGET_PAGE_SIZE);
         return true;
     }
 
@@ -71,7 +85,8 @@ bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
 
         qemu_log_mask(CPU_LOG_MMU, "MMU map mmu=%d v=%x p=%x prot=%x\n",
                       mmu_idx, vaddr, paddr, lu.prot);
-        tlb_set_page(cs, vaddr, paddr, lu.prot, mmu_idx, TARGET_PAGE_SIZE);
+        tlb_set_page_with_attrs(cs, vaddr, paddr, attrs, lu.prot, mmu_idx,
+                                TARGET_PAGE_SIZE);
         return true;
     }
 
@@ -230,7 +245,8 @@ void mb_cpu_do_interrupt(CPUState *cs)
     }
 }
 
-hwaddr mb_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
+hwaddr mb_cpu_get_phys_page_attrs_debug(CPUState *cs, vaddr addr,
+                                        MemTxAttrs *attrs)
 {
     MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
     CPUMBState *env = &cpu->env;
@@ -239,6 +255,10 @@ hwaddr mb_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
     int mmu_idx = cpu_mmu_index(env, false);
     unsigned int hit;
 
+    /* Caller doesn't initialize */
+    *attrs = (MemTxAttrs) {};
+    attrs->secure = mb_cpu_access_is_secure(cpu, MMU_DATA_LOAD);
+
     if (mmu_idx != MMU_NOMMU_IDX) {
         hit = mmu_translate(cpu, &lu, addr, 0, 0);
         if (hit) {
-- 
2.7.4