[rt-smart] testcase & improvements for memory management (#7099)

* [utest/mm] add testcase for create/init
format codes of create/init in components/mm

* [libcpu/aarch64] fix user stack check routine

* [kservice] export API for utest

* [utest/mm] testcase for aspace_map
format & modify the files under components/mm related with aspace_map

* [lwp/user_mm] add user_map_varea for mmap feature

* [mm] rename rt_mm_fault_try_fix to rt_aspace_fault_try_fix

* [utest/mm] testcase for synchronization

* [mm] modify unmap api to improve throughput

* [utest/mm] testcases for cache and varea map

* [format] remove extra space

* [utest/mm] fix testcase problem in header

* [lwp] extend map_user_varea with a flag

* [utest/mm] testcase for lwp_map_user_varea

* [libcpu/arm/cortex-a] fix kernel space layout

* [utest/mm] adjust for armv7 arch

3 files changed, 125 insertions, 11 deletions

diff --git a/components/lwp/lwp_shm.c b/components/lwp/lwp_shm.c
index 51964dd2b8..f2bacf1b13 100644
--- a/components/lwp/lwp_shm.c
+++ b/components/lwp/lwp_shm.c
@@ -56,13 +56,24 @@ static void on_shm_varea_close(struct rt_varea *varea)
     shm->ref -= 1;
 }
 
-static void on_shm_page_fault(struct rt_varea *varea, struct rt_mm_fault_msg *msg)
+static void on_shm_page_fault(struct rt_varea *varea, struct rt_aspace_fault_msg *msg)
 {
     struct lwp_shm_struct *shm;
+    int err;
     shm = rt_container_of(varea->mem_obj, struct lwp_shm_struct, mem_obj);
-    msg->response.status = MM_FAULT_STATUS_OK;
-    msg->response.vaddr = (void *)shm->addr;
-    msg->response.size = shm->size;
+
+    /* map all share page frames to user space in a time */
+    void *page = (void *)shm->addr;
+    void *pg_paddr = page + PV_OFFSET;
+    err = rt_varea_map_range(varea, varea->start, pg_paddr, shm->size);
+
+    if (err == RT_EOK)
+    {
+        msg->response.status = MM_FAULT_STATUS_OK_MAPPED;
+        msg->response.size = shm->size;
+        msg->response.vaddr = page;
+    }
+
     return ;
 }
 
@@ -383,7 +394,7 @@ int _lwp_shmdt(void *shm_vaddr)
         return -1;
     }
 
-    ret = rt_aspace_unmap(lwp->aspace, shm_vaddr, 1);
+    ret = rt_aspace_unmap(lwp->aspace, shm_vaddr);
     if (ret != RT_EOK)
     {
         ret = -1;
diff --git a/components/lwp/lwp_user_mm.c b/components/lwp/lwp_user_mm.c
index 57dfb5338b..09cc47dd2b 100644
--- a/components/lwp/lwp_user_mm.c
+++ b/components/lwp/lwp_user_mm.c
@@ -108,15 +108,18 @@ static const char *user_get_name(rt_varea_t varea)
     return name;
 }
 
+#define NO_AUTO_FETCH               0x1
+#define VAREA_CAN_AUTO_FETCH(varea) (!((rt_ubase_t)((varea)->data) & NO_AUTO_FETCH))
+
 static void _user_do_page_fault(struct rt_varea *varea,
-                                struct rt_mm_fault_msg *msg)
+                                struct rt_aspace_fault_msg *msg)
 {
     struct rt_lwp_objs *lwp_objs;
     lwp_objs = rt_container_of(varea->mem_obj, struct rt_lwp_objs, mem_obj);
 
     if (lwp_objs->source)
     {
-        void *paddr = rt_hw_mmu_v2p(lwp_objs->source, msg->vaddr);
+        void *paddr = rt_hw_mmu_v2p(lwp_objs->source, msg->fault_vaddr);
         if (paddr != ARCH_MAP_FAILED)
         {
             void *vaddr;
@@ -128,7 +131,7 @@ static void _user_do_page_fault(struct rt_varea *varea,
                 if (cp)
                 {
                     memcpy(cp, vaddr, ARCH_PAGE_SIZE);
-                    rt_varea_insert_page(varea, cp);
+                    rt_varea_pgmgr_insert(varea, cp);
                     msg->response.status = MM_FAULT_STATUS_OK;
                     msg->response.vaddr = cp;
                     msg->response.size = ARCH_PAGE_SIZE;
@@ -143,7 +146,7 @@ static void _user_do_page_fault(struct rt_varea *varea,
             {
                 rt_page_t page = rt_page_addr2page(vaddr);
                 page->ref_cnt += 1;
-                rt_varea_insert_page(varea, vaddr);
+                rt_varea_pgmgr_insert(varea, vaddr);
                 msg->response.status = MM_FAULT_STATUS_OK;
                 msg->response.vaddr = vaddr;
                 msg->response.size = ARCH_PAGE_SIZE;
@@ -155,14 +158,20 @@ static void _user_do_page_fault(struct rt_varea *varea,
             rt_mm_dummy_mapper.on_page_fault(varea, msg);
         }
     }
-    else /* if (!lwp_objs->source), no aspace as source data */
+    else if (VAREA_CAN_AUTO_FETCH(varea))
     {
+        /* if (!lwp_objs->source), no aspace as source data */
         rt_mm_dummy_mapper.on_page_fault(varea, msg);
     }
 }
 
 static void _init_lwp_objs(struct rt_lwp_objs *lwp_objs, rt_aspace_t aspace)
 {
+    /**
+     * @brief one lwp_obj represent an base layout of page based memory in user space
+     * This is useful on duplication. Where we only have a (lwp_objs and offset) to
+     * provide identical memory. This is implemented by lwp_objs->source.
+     */
     lwp_objs->source = NULL;
     lwp_objs->mem_obj.get_name = user_get_name;
     lwp_objs->mem_obj.hint_free = NULL;
@@ -198,7 +207,7 @@ static void *_lwp_map_user(struct rt_lwp *lwp, void *map_va, size_t map_size,
 int lwp_unmap_user(struct rt_lwp *lwp, void *va)
 {
     int err;
-    err = rt_aspace_unmap(lwp->aspace, va, 1);
+    err = rt_aspace_unmap(lwp->aspace, va);
     return err;
 }
 
@@ -324,6 +333,93 @@ void *lwp_map_user(struct rt_lwp *lwp, void *map_va, size_t map_size, int text)
     return ret;
 }
 
+static inline size_t _flags_to_attr(size_t flags)
+{
+    size_t attr;
+
+    if (flags & LWP_MAP_FLAG_NOCACHE)
+    {
+        attr = MMU_MAP_U_RW;
+    }
+    else
+    {
+        attr = MMU_MAP_U_RWCB;
+    }
+
+    return attr;
+}
+
+static inline mm_flag_t _flags_to_aspace_flag(size_t flags)
+{
+    mm_flag_t mm_flag = 0;
+
+    return mm_flag;
+}
+
+static rt_varea_t _lwp_map_user_varea(struct rt_lwp *lwp, void *map_va, size_t map_size, size_t flags)
+{
+    void *va = map_va;
+    int ret = 0;
+    rt_mem_obj_t mem_obj = &lwp->lwp_obj->mem_obj;
+    rt_varea_t varea;
+    mm_flag_t mm_flags;
+    size_t attr;
+
+    varea = rt_malloc(sizeof(*varea));
+    if (varea)
+    {
+        attr = _flags_to_attr(flags);
+        mm_flags = _flags_to_aspace_flag(flags);
+        ret = rt_aspace_map_static(lwp->aspace, varea, &va, map_size,
+                                   attr, mm_flags, mem_obj, 0);
+        /* let aspace handle the free of varea */
+        varea->flag &= ~MMF_STATIC_ALLOC;
+        /* don't apply auto fetch on this */
+        varea->data = (void *)NO_AUTO_FETCH;
+    }
+    else
+    {
+        ret = -RT_ENOMEM;
+    }
+
+    if (ret != RT_EOK)
+    {
+        LOG_I("lwp_map_user: failed to map %lx with size %lx with errno %d", map_va,
+              map_size, ret);
+    }
+
+    return varea;
+}
+
+static rt_varea_t _map_user_varea_ext(struct rt_lwp *lwp, void *map_va, size_t map_size, size_t flags)
+{
+    rt_varea_t varea = RT_NULL;
+    size_t offset = 0;
+
+    if (!map_size)
+    {
+        return 0;
+    }
+    offset = (size_t)map_va & ARCH_PAGE_MASK;
+    map_size += (offset + ARCH_PAGE_SIZE - 1);
+    map_size &= ~ARCH_PAGE_MASK;
+    map_va = (void *)((size_t)map_va & ~ARCH_PAGE_MASK);
+
+    varea = _lwp_map_user_varea(lwp, map_va, map_size, flags);
+
+    return varea;
+}
+
+rt_varea_t lwp_map_user_varea_ext(struct rt_lwp *lwp, void *map_va, size_t map_size, size_t flags)
+{
+    return _map_user_varea_ext(lwp, map_va, map_size, flags);
+}
+
+rt_varea_t lwp_map_user_varea(struct rt_lwp *lwp, void *map_va, size_t map_size)
+{
+    return _map_user_varea_ext(lwp, map_va, map_size, LWP_MAP_FLAG_NONE);
+}
+
 void *lwp_map_user_phy(struct rt_lwp *lwp, void *map_va, void *map_pa,
                        size_t map_size, int cached)
 {
diff --git a/components/lwp/lwp_user_mm.h b/components/lwp/lwp_user_mm.h
index c057f23b88..d2c6681e29 100644
--- a/components/lwp/lwp_user_mm.h
+++ b/components/lwp/lwp_user_mm.h
@@ -25,12 +25,19 @@
 extern "C" {
 #endif
 
+#define LWP_MAP_FLAG_NONE       0x0000
+#define LWP_MAP_FLAG_NOCACHE    0x0001
+
 int lwp_user_space_init(struct rt_lwp *lwp, rt_bool_t is_fork);
 void lwp_unmap_user_space(struct rt_lwp *lwp);
 
 int lwp_unmap_user(struct rt_lwp *lwp, void *va);
 void *lwp_map_user(struct rt_lwp *lwp, void *map_va, size_t map_size, rt_bool_t text);
 
+rt_varea_t lwp_map_user_varea(struct rt_lwp *lwp, void *map_va, size_t map_size);
+/* check LWP_MAP_FLAG_* */
+rt_varea_t lwp_map_user_varea_ext(struct rt_lwp *lwp, void *map_va, size_t map_size, size_t flags);
+
 void *lwp_map_user_phy(struct rt_lwp *lwp, void *map_va, void *map_pa, size_t map_size, rt_bool_t cached);
 int lwp_unmap_user_phy(struct rt_lwp *lwp, void *va);