[PATCH v4 05/17] mcdstub: memory helper functions added

[Nicolas Eder]

---
 include/exec/cpu-common.h |  3 +++
 include/exec/memory.h     |  9 +++++++++
 system/memory.c           | 11 +++++++++++
 system/physmem.c          | 26 ++++++++++++++++++++++++++
 4 files changed, 49 insertions(+)

diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
index 41115d8919..dd989b5ab2 100644
--- a/include/exec/cpu-common.h
+++ b/include/exec/cpu-common.h
@@ -182,6 +182,9 @@ int ram_block_discard_range(RAMBlock *rb, uint64_t start, 
size_t length);
 int cpu_memory_rw_debug(CPUState *cpu, vaddr addr,
                         void *ptr, size_t len, bool is_write);
 
+int cpu_memory_get_physical_address(CPUState *cpu, vaddr *addr, size_t *len);
+
+
 /* vl.c */
 void list_cpus(void);
 
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 831f7c996d..174de807d5 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -3142,6 +3142,15 @@ bool ram_block_discard_is_disabled(void);
  */
 bool ram_block_discard_is_required(void);
 
+/*
+ * mcd_find_address_space() - Find the address spaces with the corresponding
+ * name.
+ *
+ * Currently only used by the mcd debugger.
+ * @as_name: Name to look for.
+ */
+AddressSpace *mcd_find_address_space(const char *as_name);
+
 #endif
 
 #endif
diff --git a/system/memory.c b/system/memory.c
index 798b6c0a17..9a8fa79e0c 100644
--- a/system/memory.c
+++ b/system/memory.c
@@ -3562,6 +3562,17 @@ void mtree_info(bool flatview, bool dispatch_tree, bool 
owner, bool disabled)
     }
 }
 
+AddressSpace *mcd_find_address_space(const char *as_name)
+{
+    AddressSpace *as;
+    QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
+        if (strcmp(as->name, as_name) == 0) {
+            return as;
+        }
+    }
+    return NULL;
+}
+
 void memory_region_init_ram(MemoryRegion *mr,
                             Object *owner,
                             const char *name,
diff --git a/system/physmem.c b/system/physmem.c
index a63853a7bc..70733c67c7 100644
--- a/system/physmem.c
+++ b/system/physmem.c
@@ -3422,6 +3422,32 @@ int cpu_memory_rw_debug(CPUState *cpu, vaddr addr,
     return 0;
 }
 
+int cpu_memory_get_physical_address(CPUState *cpu, vaddr *addr, size_t *len)
+{
+    hwaddr phys_addr;
+    vaddr l, page;
+
+    cpu_synchronize_state(cpu);
+    MemTxAttrs attrs;
+
+    page = *addr & TARGET_PAGE_MASK;
+    phys_addr = cpu_get_phys_page_attrs_debug(cpu, page, &attrs);
+    /* if no physical page mapped, return an error */
+    if (phys_addr == -1) {
+        return -1;
+    }
+    l = (page + TARGET_PAGE_SIZE) - *addr;
+    if (l > *len) {
+        l = *len;
+    }
+    phys_addr += (*addr & ~TARGET_PAGE_MASK);
+
+    /* set output values */
+    *addr = phys_addr;
+    *len = l;
+    return 0;
+}
+
 /*
  * Allows code that needs to deal with migration bitmaps etc to still be built
  * target independent.
-- 
2.34.1