diff --git a/Kconfig b/Kconfig
index 522800bd2e11be2a7ba428734b7e985dac8c886a..a47e793f482674f1f3c2c284751fc91bdfba9fed 100644
--- a/Kconfig
+++ b/Kconfig
@@ -42,11 +42,11 @@ choice
 
 config COMPILER_HIMIX_32
     bool "arm-linux-ohoseabi"
-    depends on PLATFORM_HI3518EV300 || PLATFORM_HI3516DV300
+    depends on PLATFORM_HI3518EV300 || PLATFORM_HI3516DV300 || PLATFORM_QEMU_ARM_VIRT_CA7
 
 config COMPILER_CLANG_LLVM
     bool "clang-llvm"
-        depends on PLATFORM_HI3518EV300 || PLATFORM_HI3516DV300
+    depends on PLATFORM_HI3518EV300 || PLATFORM_HI3516DV300 || PLATFORM_QEMU_ARM_VIRT_CA7
 
 endchoice
 endmenu
@@ -274,7 +274,7 @@ config VM_OVERLAP_CHECK
 config NULL_ADDRESS_PROTECT
     bool "Enable NULL Address protect"
     default n
-    depends on (PLATFORM_HI3518EV200 || PLATFORM_HI3516CV300 || PLATFORM_HI3518EV300 || PLATFORM_HI3516DV300) && DEBUG_VERSION
+    depends on (PLATFORM_HI3518EV200 || PLATFORM_HI3516CV300 || PLATFORM_HI3518EV300 || PLATFORM_HI3516DV300 || PLATFORM_QEMU_ARM_VIRT_CA7) && DEBUG_VERSION
     help
       Answer Y to set mem address 0~1M prohibit to access, read or write will trigger exception.
 
diff --git a/Makefile b/Makefile
index 0a7cd5af7e02d92df0f43757ae1946a71ff84105..b7f3d0453396309fe79cf61ed12bf98adb3b23e3 100644
--- a/Makefile
+++ b/Makefile
@@ -59,6 +59,9 @@ endif
 ifeq ($(LOSCFG_PLATFORM_HI3516DV300), y)
 FSTYPE = vfat
 endif
+ifeq ($(LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7), y)
+FSTYPE = vfat
+endif
 ROOTFS_DIR = $(OUT)/rootfs
 ROOTFS_ZIP = $(OUT)/rootfs.zip
 VERSION =
@@ -97,13 +100,20 @@ endif
 ##### make dynload #####
 -include $(LITEOS_MK_PATH)/dynload.mk
 
+ifeq ($(findstring y, $(LOSCFG_PLATFORM_HI3518EV300)$(LOSCFG_PLATFORM_HI3516DV300)), y)
+VENDOR_BOARD_INCLUDE := $(LITEOSTOPDIR)/../../vendor/hisi/hi35xx/$(LITEOS_PLATFORM)/config/board
+else ifeq ($(LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7), y)
+VENDOR_BOARD_INCLUDE := $(LITEOSTOPDIR)/../../device/qemu/arm/$(LITEOS_PLATFORM)/config/board
+else
+$(error "No VENDOR_BOARD_INCLUDE defined")
+endif
 #-----need move when make version-----#
 ##### make lib #####
 $(__LIBS): $(OUT) $(CXX_INCLUDE)
 
 $(OUT): $(LITEOS_MENUCONFIG_H)
 	$(HIDE)mkdir -p $(OUT)/lib
-	$(HIDE)$(CC) -I$(LITEOS_PLATFORM_BASE)/include -I$(LITEOSTOPDIR)/../../vendor/hisi/hi35xx/$(LITEOS_PLATFORM)/config/board \
+	$(HIDE)$(CC) -I$(LITEOS_PLATFORM_BASE)/include -I$(VENDOR_BOARD_INCLUDE)  \
 		-E $(LITEOS_PLATFORM_BASE)/board.ld.S \
 		-o $(LITEOS_PLATFORM_BASE)/board.ld -P
 
@@ -126,6 +136,7 @@ menuconfig:$(MENUCONFIG_PATH)/mconf
 
 genconfig:$(MENUCONFIG_PATH)/conf
 	$(HIDE)mkdir -p include/config include/generated
+	$< --olddefconfig $(KCONFIG_FILE_PATH)
 	$< --silentoldconfig $(KCONFIG_FILE_PATH)
 	-mv -f $(LITEOS_MENUCONFIG_H) $(LITEOS_PLATFORM_MENUCONFIG_H)
 ##### menuconfig end #######
diff --git a/arch/arm/arm/Makefile b/arch/arm/arm/Makefile
index 24d47056b11cad0e784abdec6555fa99029695ad..648fe5c79c194e050c200515f7a20288d97f173a 100644
--- a/arch/arm/arm/Makefile
+++ b/arch/arm/arm/Makefile
@@ -35,6 +35,7 @@ LOCAL_SRCS := $(wildcard src/*.c) $(wildcard src/*.S)
 LOCAL_INCLUDE := \
 	-I $(LITEOSTOPDIR)/kernel/base/include \
 	-I $(LITEOSTOPDIR)/kernel/extended/include \
+	-I $(LITEOSTOPDIR)/kernel/extended/dynload/include \
 	-I $(LITEOSTOPDIR)/arch/arm/arm/include \
 
 ifeq ($(LITEOS_ARM_ARCH), -march=armv7-a)
diff --git a/arch/arm/arm/src/los_hw_exc.S b/arch/arm/arm/src/los_hw_exc.S
index 25d8639c3b8768fde0031cb1b8baf6c9af5d2c51..1dc3cf52c28b7385ff33d7c943be7b9db4a444c0 100644
--- a/arch/arm/arm/src/los_hw_exc.S
+++ b/arch/arm/arm/src/los_hw_exc.S
@@ -57,7 +57,11 @@
     .global   _osExceptPrefetchAbortHdl
     .global   _osExceptSwiHdl
     .global   _osExceptUndefInstrHdl
+#if defined(LOSCFG_CC_STACKPROTECTOR_ALL) || \
+    defined(LOSCFG_CC_STACKPROTECTOR_STRONG) || \
+    defined(LOSCFG_CC_STACKPROTECTOR)
     .global   __stack_chk_guard_setup
+#endif
 
 
     .fpu vfpv4
@@ -147,15 +151,22 @@
 .endm
 #endif
 
+#if defined(LOSCFG_CC_STACKPROTECTOR_ALL) || \
+    defined(LOSCFG_CC_STACKPROTECTOR_STRONG) || \
+    defined(LOSCFG_CC_STACKPROTECTOR)
 @ Description: Stack-Protector Init
 __stack_chk_guard_setup:
     PUSH    {FP, LR}
+#if defined(LOSCFG_PLATFORM_HI3516DV300) || defined(LOSCFG_PLATFORM_HI3518EV300)
+    /* Randomize __stack_chk_quard using platform-specific function. */
     BL      OsRandomStackGuard
     LDR     R1, =__stack_chk_guard
     MOV     R3, R0
     ORR     R2, R3, #0X80000000
     STR     R2, [R1]
+#endif
     POP     {FP, PC}
+#endif
 
 @ Description: Undefined instruction exception handler
 _osExceptUndefInstrHdl:
diff --git a/bsd/compat/linuxkpi/Makefile b/bsd/compat/linuxkpi/Makefile
index 5244c46976b5a48ebec3cd1be89205deb7d1aa3c..be7ffc704fd2c25077b78ce1dbc702d9f82fcb22 100644
--- a/bsd/compat/linuxkpi/Makefile
+++ b/bsd/compat/linuxkpi/Makefile
@@ -33,6 +33,10 @@ MODULE_NAME := $(notdir $(shell pwd))
 
 LOCAL_SRCS :=  $(wildcard src/*.c)
 
+ifneq ($(LOSCFG_HRTIMER_ENABLE), y)
+LOCAL_SRCS := $(filter-out src/linux_hrtimer.c, $(LOCAL_SRCS))
+endif
+
 LOCAL_INCLUDE := \
         -I $(LITEOSTOPDIR)/kernel/base/include \
         -I $(LITEOSTOPDIR)/bsd/compat/linuxkpi/include
diff --git a/fs/include/disk.h b/fs/include/disk.h
index 569c0e586b59daee0049ce08775faab9e6a93eae..072cc4327af3e906fee55b819a9cd182ad5c6975 100644
--- a/fs/include/disk.h
+++ b/fs/include/disk.h
@@ -47,6 +47,8 @@
 
 #endif
 
+#include "pthread.h"
+
 #ifdef __cplusplus
 #if __cplusplus
 extern "C" {
diff --git a/fs/vfs/disk/disk.c b/fs/vfs/disk/disk.c
index 99bd612ca90e0be299a4d633b74ed69e508db392..590e8327f96d03291c78a910e750b9383db3cd9e 100644
--- a/fs/vfs/disk/disk.c
+++ b/fs/vfs/disk/disk.c
@@ -34,7 +34,6 @@
 #include "stdlib.h"
 #include "unistd.h"
 #include "sys/mount.h"
-#include "pthread.h"
 #include "linux/spinlock.h"
 #include "inode/inode.h"
 
diff --git a/kernel/base/include/los_vm_iomap.h b/kernel/base/include/los_vm_iomap.h
index f73aa89a9f5959269057843b3dfe12c15a24ba6e..1b49251079818bf631829a604d1f99ae75a5f9ce 100644
--- a/kernel/base/include/los_vm_iomap.h
+++ b/kernel/base/include/los_vm_iomap.h
@@ -46,8 +46,8 @@ enum DmaMemType {
     DMA_NOCACHE
 };
 
-#define IS_PERIPH_ADDR(addr)    ((addr >= PERIPH_PMM_BASE) && (addr <= PERIPH_PMM_BASE + PERIPH_PMM_SIZE))
-#define IS_MEMORY_ADDR(addr)    ((addr >= DDR_MEM_ADDR) && (addr <= DDR_MEM_ADDR + DDR_MEM_SIZE))
+#define IS_PERIPH_ADDR(addr)    (((addr) >= U32_C(PERIPH_PMM_BASE)) && ((addr) <= U32_C(PERIPH_PMM_BASE) + U32_C(PERIPH_PMM_SIZE)))
+#define IS_MEMORY_ADDR(addr)    (((addr) >= U32_C(DDR_MEM_ADDR)) && ((addr) <= U32_C(DDR_MEM_ADDR) + U32_C(DDR_MEM_SIZE)))
 
 /* thread safety */
 VOID *LOS_DmaMemAlloc(DMA_ADDR_T *dmaAddr, size_t size, size_t align, enum DmaMemType type);
diff --git a/kernel/base/include/los_vm_zone.h b/kernel/base/include/los_vm_zone.h
index 0292effd8a4a31023dede17f848cc92e7c3b0d70..0baba0a2d02cbd5b7411e3950e22d8897f374a31 100644
--- a/kernel/base/include/los_vm_zone.h
+++ b/kernel/base/include/los_vm_zone.h
@@ -40,11 +40,11 @@ extern "C" {
 #endif /* __cplusplus */
 #endif /* __cplusplus */
 
-#define DEFINE_(X)  X##U
-#define DEFINE(X)   DEFINE_(X)
+#define _U32_C(X)  X##U
+#define U32_C(X)   _U32_C(X)
 
-#define KERNEL_VMM_BASE         DEFINE(KERNEL_VADDR_BASE)
-#define KERNEL_VMM_SIZE         DEFINE(KERNEL_VADDR_SIZE)
+#define KERNEL_VMM_BASE         U32_C(KERNEL_VADDR_BASE)
+#define KERNEL_VMM_SIZE         U32_C(KERNEL_VADDR_SIZE)
 
 #define KERNEL_ASPACE_BASE      KERNEL_VMM_BASE
 #define KERNEL_ASPACE_SIZE      KERNEL_VMM_SIZE
@@ -57,11 +57,11 @@ extern "C" {
 #define VMALLOC_SIZE            0x08000000
 
 #define PERIPH_DEVICE_BASE      (VMALLOC_START + VMALLOC_SIZE)
-#define PERIPH_DEVICE_SIZE      PERIPH_PMM_SIZE
+#define PERIPH_DEVICE_SIZE      U32_C(PERIPH_PMM_SIZE)
 #define PERIPH_CACHED_BASE      (PERIPH_DEVICE_BASE + PERIPH_DEVICE_SIZE)
-#define PERIPH_CACHED_SIZE      PERIPH_PMM_SIZE
+#define PERIPH_CACHED_SIZE      U32_C(PERIPH_PMM_SIZE)
 #define PERIPH_UNCACHED_BASE    (PERIPH_CACHED_BASE + PERIPH_CACHED_SIZE)
-#define PERIPH_UNCACHED_SIZE    PERIPH_PMM_SIZE
+#define PERIPH_UNCACHED_SIZE    U32_C(PERIPH_PMM_SIZE)
 
 #define IO_DEVICE_ADDR(paddr)        (paddr - PERIPH_PMM_BASE + PERIPH_DEVICE_BASE)
 #define IO_CACHED_ADDR(paddr)        (paddr - PERIPH_PMM_BASE + PERIPH_CACHED_BASE)
diff --git a/kernel/base/misc/kill_shellcmd.c b/kernel/base/misc/kill_shellcmd.c
index 96b3d7e044c0947539034f10ce7fe6117f565c0a..c1a0231aff916f60af624fcaf857cabb634efb25 100644
--- a/kernel/base/misc/kill_shellcmd.c
+++ b/kernel/base/misc/kill_shellcmd.c
@@ -35,7 +35,14 @@
 #include "los_printf.h"
 #include "los_task_pri.h"
 #include "los_process_pri.h"
+
+#ifdef LOSCFG_BASE_CORE_HILOG
 #include "log.h"
+#else
+#define HILOG_INFO(type, fmt, ...)	PRINT_INFO(fmt, __VA_ARGS__)
+#define HILOG_ERROR(type, fmt, ...)	PRINT_ERR(fmt, __VA_ARGS__)
+#endif
+
 #ifdef LOSCFG_SHELL
 #include "shcmd.h"
 #include "shell.h"
diff --git a/kernel/common/los_config.c b/kernel/common/los_config.c
index 368dd63140037b135ea15c8cedcfbd9446f78414..a9b78390700d1942893ed2aff46b59146b284cf8 100644
--- a/kernel/common/los_config.c
+++ b/kernel/common/los_config.c
@@ -132,6 +132,11 @@ extern "C" {
 extern UINT32 OsSystemInit(VOID);
 extern VOID SystemInit(VOID);
 
+VOID __attribute__((weak)) SystemInit(VOID)
+{
+    PRINT_WARN("Function not implemented. Using weak reference stub\n");
+}
+
 LITE_OS_SEC_TEXT_INIT VOID osRegister(VOID)
 {
     g_sysClock = OS_SYS_CLOCK;
@@ -205,7 +210,17 @@ LITE_OS_SEC_TEXT_INIT STATIC VOID OsDriverHiEventInit(VOID)
 extern void configure (void);
 LITE_OS_SEC_TEXT_INIT STATIC INT32 OsBsdInit(VOID)
 {
+    /*
+     * WORKAROUND: Inside configure(), nexus_init() function calls
+     *             HiSi-specific, library procedure - machine_resource_init().
+     *             The latter one is defined in libhi35xx_bsp.a which is only
+     *             available for Hi3516 and Hi3518.
+     *             Temporarily ifdef configure until this routine is implemented
+     *             by other platforms.
+     */
+#if defined(LOSCFG_PLATFORM_HI3516DV300) || defined(LOSCFG_PLATFORM_HI3518EV300)
     configure();
+#endif
     mi_startup(SI_SUB_ARCH_INIT);
     return LOS_OK;
 }
diff --git a/kernel/common/los_rootfs.c b/kernel/common/los_rootfs.c
index 8add614e8896251b061a1fea16f1d2dfbb6ca562..8210ad64d4315d8eab36d202c981012ecaa3b312 100644
--- a/kernel/common/los_rootfs.c
+++ b/kernel/common/los_rootfs.c
@@ -232,6 +232,17 @@ STATIC INT32 GetArgs(CHAR **args)
     }
 #endif
 
+#ifdef LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7
+    /*
+     * TODO: Implement method of fetching bootargs for
+     *       Qemu ARM virtual platform. If used without
+     *       bootloader it will pass DTB by default.
+     */
+    (void)ret;
+    PRINT_ERR("Fetching bootargs unimplemented.\n");
+    goto ERROUT;
+#endif
+
     for (i = 0; i < COMMAND_LINE_SIZE; i += len + 1) {
         len = strlen(cmdLine + i);
         tmp = strstr(cmdLine + i, bootargName);
diff --git a/kernel/user/src/los_user_init.c b/kernel/user/src/los_user_init.c
index e1bb9cfd8e4aa67e60858832282f93c356970114..d8434323dcd4b92ea186594042e19ca13eb6b6a7 100644
--- a/kernel/user/src/los_user_init.c
+++ b/kernel/user/src/los_user_init.c
@@ -30,13 +30,13 @@
  */
 
 #include "los_user_init.h"
+
+#ifdef LOSCFG_KERNEL_DYNLOAD
 #include "los_syscall.h"
 
 #define SYS_CALL_VALUE 0x900001
 
-#ifdef LOSCFG_KERNEL_DYNLOAD
 LITE_USER_SEC_RODATA STATIC CHAR *g_initPath = "/bin/init";
-#endif
 
 LITE_USER_SEC_TEXT STATIC UINT32 sys_call3(UINT32 nbr, UINT32 parm1, UINT32 parm2, UINT32 parm3)
 {
@@ -55,6 +55,7 @@ LITE_USER_SEC_TEXT STATIC UINT32 sys_call3(UINT32 nbr, UINT32 parm1, UINT32 parm
 
     return reg0;
 }
+#endif
 
 LITE_USER_SEC_ENTRY VOID OsUserInit(VOID *args)
 {
diff --git a/platform/Kconfig b/platform/Kconfig
index 2b34a8dcd12cb170a67dceb873b04602bfe1fd20..db1af3f932794b2acbdcc8e9fd9dd69cd0d972b7 100644
--- a/platform/Kconfig
+++ b/platform/Kconfig
@@ -2,6 +2,7 @@ config PLATFORM
     string
     default "hi3516dv300"     if PLATFORM_HI3516DV300
     default "hi3518ev300"     if PLATFORM_HI3518EV300
+    default "virt"            if PLATFORM_QEMU_ARM_VIRT_CA7
 
 choice
     prompt "Board"
@@ -10,6 +11,8 @@ choice
       IPC has several chips:
       hi3516dv300
       hi3518ev300
+      Qemu ARM Virt variants (based on different CPU types):
+      qemu_arm_virt_ca7
 
 config PLATFORM_HI3516DV300
     bool "hi3516dv300"
@@ -19,6 +22,12 @@ config PLATFORM_HI3518EV300
     bool "hi3518ev300"
     select ARCH_CORTEX_A7
 
+config PLATFORM_QEMU_ARM_VIRT_CA7
+    bool "qemu_arm_virt_ca7"
+    select ARCH_CORTEX_A7
+    help
+        QEMU ARM Virtual Platform using Cortex-A7 CPU.
+
 endchoice
 
 config TEE_ENABLE
@@ -47,3 +56,10 @@ config PLATFORM_BSP_GIC_V3
       General Interrupt Controller version 3.
 
 endchoice
+
+config HRTIMER_ENABLE
+    bool "HR TIMER enable"
+    default y
+    help
+      Enable High-resolution timer support
+
diff --git a/platform/Makefile b/platform/Makefile
index e7ced6bb81f54e57e9984813a9309c66922e31b7..34ab7750bad97f8315148d8694bdcc4bafbf5df2 100644
--- a/platform/Makefile
+++ b/platform/Makefile
@@ -33,19 +33,28 @@ MODULE_NAME := bsp
 
 LOCAL_SRCS = $(wildcard $(HWI_SRC)/*.c) \
             $(wildcard $(TIMER_SRC)/*.c) \
-            $(wildcard $(HRTIMER_SRC)/*.c) \
             $(wildcard $(UART_SRC)/*.c) \
             $(wildcard ./main.c)
 
+ifeq ($(LOSCFG_HRTIMER_ENABLE), y)
+LOCAL_SRCS += $(wildcard $(HRTIMER_SRC)/*.c)
+endif
+
 LOCAL_INCLUDE += -I $(LITEOSTOPDIR)/compat/posix/src \
                  -I $(LITEOSTOPDIR)/bsd/dev/random
 
-ifeq ($(findstring y, $(LOSCFG_PLATFORM_HI3518EV300)$(LOSCFG_PLATFORM_HI3516DV300)), y)
+MAIN_PLATFORMS := $(LOSCFG_PLATFORM_HI3518EV300) \
+                  $(LOSCFG_PLATFORM_HI3516DV300) \
+                  $(LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7)
+ifeq ($(findstring y, $(MAIN_PLATFORMS)), y)
 LOCAL_SRCS += $(wildcard ../kernel/common/*.c)
 LOCAL_SRCS := $(filter-out ../kernel/common/los_rootfs.c, $(LOCAL_SRCS))
 ifneq ($(LOSCFG_FS_VFS), y)
 LOCAL_SRCS := $(filter-out ../kernel/common/console.c ../kernel/common/virtual_serial.c, $(LOCAL_SRCS))
 endif
+ifneq ($(LOSCFG_BASE_CORE_HILOG), y)
+LOCAL_SRCS := $(filter-out ../kernel/common/los_hilog.c, $(LOCAL_SRCS))
+endif
 else
 LOCAL_SRCS += $(wildcard ../kernel/common/los_config.c)
 LOCAL_SRCS += $(wildcard ../kernel/common/los_printf.c)
diff --git a/platform/bsp.mk b/platform/bsp.mk
index 7714dbfa9486c17e8381b87b74a4c1b568a2cb80..9deee827301fb549693b17e91cfd7e7ebdac4fbe 100644
--- a/platform/bsp.mk
+++ b/platform/bsp.mk
@@ -56,11 +56,19 @@ else ifeq ($(LOSCFG_PLATFORM_HI3518EV300), y)
     USB_TYPE     := usb3.0_hi3518ev300
     LITEOS_CMACRO_TEST += -DTEST3518EV300
 
+########################## Qemu ARM Virt Options##############################
+else ifeq ($(LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7), y)
+    HWI_TYPE     := arm/interrupt/gic
+    TIMER_TYPE   := arm/timer/arm_generic
+    UART_TYPE    := amba_pl011
+
 endif
 
+ifeq ($(LOSCFG_HRTIMER_ENABLE), y)
+HRTIMER_SRC := hw/$(HRTIMER_TYPE)
+endif
 HWI_SRC     := hw/$(HWI_TYPE)
 TIMER_SRC   := hw/$(TIMER_TYPE)
-HRTIMER_SRC := hw/$(HRTIMER_TYPE)
 NET_SRC     := net/$(NET_TYPE)
 UART_SRC    := uart/$(UART_TYPE)
 USB_SRC     := usb/$(USB_TYPE)
@@ -69,22 +77,26 @@ LITEOS_BASELIB       += -lbsp
 
 LITEOS_PLATFORM      := $(subst $\",,$(LOSCFG_PLATFORM))
 
-PLATFORM_BSP_HISI_BASE := $(LITEOSTOPDIR)/platform
+PLATFORM_BSP_BASE := $(LITEOSTOPDIR)/platform
 
-PLATFORM_INCLUDE := -I $(LITEOSTOPDIR)/../../vendor/hisi/hi35xx/$(LITEOS_PLATFORM)/config/board/include \
-                    -I $(PLATFORM_BSP_HISI_BASE)/../kernel/common \
-                    -I $(PLATFORM_BSP_HISI_BASE)/../../../drivers/liteos/platform/pm \
-                    -I $(PLATFORM_BSP_HISI_BASE)/hw/include \
-                    -I $(PLATFORM_BSP_HISI_BASE)/include \
-                    -I $(PLATFORM_BSP_HISI_BASE)/$(UART_SRC)
+PLATFORM_INCLUDE := -I $(PLATFORM_BSP_BASE)/../kernel/common \
+                    -I $(PLATFORM_BSP_BASE)/../../../drivers/liteos/platform/pm \
+                    -I $(PLATFORM_BSP_BASE)/hw/include \
+                    -I $(PLATFORM_BSP_BASE)/include \
+                    -I $(PLATFORM_BSP_BASE)/$(UART_SRC)
 
 ifeq ($(findstring y, $(LOSCFG_PLATFORM_HI3518EV300)$(LOSCFG_PLATFORM_HI3516DV300)), y)
+    PLATFORM_INCLUDE += -I $(LITEOSTOPDIR)/../../vendor/hisi/hi35xx/$(LITEOS_PLATFORM)/config/board/include
     PLATFORM_INCLUDE += -I $(LITEOSTOPDIR)/../../vendor/hisi/hi35xx/$(LITEOS_PLATFORM)/config/board/include/hisoc
+else ifeq ($(LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7), y)
+    PLATFORM_INCLUDE += -I $(LITEOSTOPDIR)/../../device/qemu/arm/$(LITEOS_PLATFORM)/config/board/include
+    # TODO: remove hisoc dependency in the code to avoid using hisoc here
+    PLATFORM_INCLUDE += -I $(LITEOSTOPDIR)/../../device/qemu/arm/$(LITEOS_PLATFORM)/config/board/include/hisoc
 endif
 #
 #-include $(LITEOSTOPDIR)/platform/bsp/board/$(LITEOS_PLATFORM)/board.mk
 #
 
-LIB_SUBDIRS             += $(PLATFORM_BSP_HISI_BASE)
+LIB_SUBDIRS             += $(PLATFORM_BSP_BASE)
 LITEOS_PLATFORM_INCLUDE += $(PLATFORM_INCLUDE)
 LITEOS_CXXINCLUDE       += $(PLATFORM_INCLUDE)
diff --git a/shell/full/src/base/show.c b/shell/full/src/base/show.c
index 4b9cce00b0ed32e83710bc67d3f4c511eba86bb8..e7eeae7e1585b9d76d14e2732a2ceae57d75f346 100644
--- a/shell/full/src/base/show.c
+++ b/shell/full/src/base/show.c
@@ -100,7 +100,16 @@ STATIC UINT32 OsShellSourceInit(INT32 consoleId)
         ret = LOS_NOK;
         goto ERR_OUT4;
     }
-    if (consoleId == CONSOLE_TELNET) {
+    if (consoleId == CONSOLE_TELNET
+#if !defined(LOSCFG_PLATFORM_ROOTFS)
+        /*
+	 * In case of ROOTFS disabled but
+	 * serial console enabled, it is required
+	 * to create Shell task in kernel for it.
+	 */
+        || consoleId == CONSOLE_SERIAL
+#endif
+                                        ) {
         ret = OsShellCreateTask(shellCB);
         if (ret != LOS_OK) {
             goto ERR_OUT4;
diff --git a/syscall/Makefile b/syscall/Makefile
index ef0e26a72ddb6433efb51e018e85e449e782fa8c..bb32fe6e86074083395b484b993d86765ab2ca41 100644
--- a/syscall/Makefile
+++ b/syscall/Makefile
@@ -33,7 +33,12 @@ MODULE_NAME := $(notdir $(shell pwd))
 
 LOCAL_SRCS := $(wildcard *.c)
 
+ifneq ($(LOSCFG_NET_LWIP_SACK), y)
+LOCAL_SRCS := $(filter-out net_syscall.c, $(LOCAL_SRCS))
+endif
+
 LOCAL_INCLUDE := -I $(LITEOSTOPDIR)/kernel/base/include \
+                 -I $(LITEOSTOPDIR)/kernel/extended/dynload/include \
                  -I $(LITEOSTOPDIR)/fs/include \
                  -I $(LITEOSTOPDIR)/compat/posix/include \
                  -I $(LITEOSTOPDIR)/bsd/compat/linuxkpi/include \
diff --git a/syscall/los_syscall.c b/syscall/los_syscall.c
index 136c2ef0975ecb7a79a772e0b8ce8c8d5ac09497..04bd37848e1011ddb2599869b99b9cd477ed4fd3 100644
--- a/syscall/los_syscall.c
+++ b/syscall/los_syscall.c
@@ -30,6 +30,12 @@
  */
 
 #define _GNU_SOURCE
+#include "menuconfig.h"
+#ifdef LOSCFG_FS_VFS
+#include "fs/fs.h"
+#include "fs/file.h"
+#endif
+#include "los_signal.h"
 #include "los_syscall.h"
 #include "los_task_pri.h"
 #include "los_process_pri.h"
@@ -40,10 +46,6 @@
 #include "mqueue.h"
 #include "los_futex_pri.h"
 #include "sys/times.h"
-#ifdef LOSCFG_FS_VFS
-#include "fs/fs.h"
-#include "fs/file.h"
-#endif
 #include "dirent.h"
 #include "fcntl.h"
 #include "unistd.h"
diff --git a/syscall/net_syscall.c b/syscall/net_syscall.c
index f1ac24899e83dbb79d38f09453f2d81fab6495f7..da948df5381472164610237c8d8524546fdf0f5a 100644
--- a/syscall/net_syscall.c
+++ b/syscall/net_syscall.c
@@ -29,7 +29,6 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "los_syscall.h"
 #include "los_process_pri.h"
 #include "lwip/sockets.h"
 #include <stdlib.h>
diff --git a/syscall/time_syscall.c b/syscall/time_syscall.c
index 3a3502de3a17bfbe62b9635540568e6e543a7f59..ab1c42782a9677590129705576408358064bfbce 100644
--- a/syscall/time_syscall.c
+++ b/syscall/time_syscall.c
@@ -36,6 +36,7 @@
 #include "time.h"
 #include "user_copy.h"
 #include "sys/times.h"
+#include "los_signal.h"
 #include "los_memory.h"
 #include "los_strncpy_from_user.h"
 
diff --git a/tools/build/config/debug/hi3516dv300_clang.config b/tools/build/config/debug/hi3516dv300_clang.config
index a34f516f6f887f5105eeb0dbc753597a8172d00e..111ba398c1d86a10fc477f6c058efa8cb88321fc 100644
--- a/tools/build/config/debug/hi3516dv300_clang.config
+++ b/tools/build/config/debug/hi3516dv300_clang.config
@@ -15,8 +15,10 @@ LOSCFG_COMPILER_CLANG_LLVM=y
 LOSCFG_PLATFORM="hi3516dv300"
 LOSCFG_PLATFORM_HI3516DV300=y
 # LOSCFG_PLATFORM_HI3518EV300 is not set
+# LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7 is not set
 # LOSCFG_TEE_ENABLE is not set
 LOSCFG_PLATFORM_BSP_GIC_V2=y
+LOSCFG_HRTIMER_ENABLE=y
 LOSCFG_ARCH_ARM=y
 LOSCFG_ARCH_ARM_AARCH32=y
 LOSCFG_ARCH_ARM_V7A=y
diff --git a/tools/build/config/debug/hi3518ev300_clang.config b/tools/build/config/debug/hi3518ev300_clang.config
index 8a4d6ebed6bec1659bb9f1cdf3bac3bca1f4b7d9..339674a91d8eccdfe8a7102917b14f4ce83a3aa7 100644
--- a/tools/build/config/debug/hi3518ev300_clang.config
+++ b/tools/build/config/debug/hi3518ev300_clang.config
@@ -15,7 +15,9 @@ LOSCFG_COMPILER_CLANG_LLVM=y
 LOSCFG_PLATFORM="hi3518ev300"
 # LOSCFG_PLATFORM_HI3516DV300 is not set
 LOSCFG_PLATFORM_HI3518EV300=y
+# LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7 is not set
 LOSCFG_PLATFORM_BSP_GIC_V2=y
+LOSCFG_HRTIMER_ENABLE=y
 LOSCFG_ARCH_ARM=y
 LOSCFG_ARCH_ARM_AARCH32=y
 LOSCFG_ARCH_ARM_V7A=y
diff --git a/tools/build/config/debug/qemu_arm_virt_ca7_clang.config b/tools/build/config/debug/qemu_arm_virt_ca7_clang.config
new file mode 100644
index 0000000000000000000000000000000000000000..b56d817ada4d849efd9a1988d3e19b9a7b2797ea
--- /dev/null
+++ b/tools/build/config/debug/qemu_arm_virt_ca7_clang.config
@@ -0,0 +1,147 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Huawei LiteOS Configuration
+#
+
+#
+# Compiler
+#
+# LOSCFG_COMPILER_HIMIX_32 is not set
+LOSCFG_COMPILER_CLANG_LLVM=y
+
+#
+# Platform
+#
+LOSCFG_PLATFORM="virt"
+# LOSCFG_PLATFORM_HI3516DV300 is not set
+# LOSCFG_PLATFORM_HI3518EV300 is not set
+LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7=y
+LOSCFG_PLATFORM_BSP_GIC_V2=y
+# LOSCFG_HRTIMER_ENABLE is not set
+LOSCFG_ARCH_ARM=y
+LOSCFG_ARCH_ARM_AARCH32=y
+LOSCFG_ARCH_ARM_V7A=y
+LOSCFG_ARCH_ARM_VER="armv7-a"
+LOSCFG_ARCH_FPU_VFP_V4=y
+LOSCFG_ARCH_FPU_VFP_D32=y
+LOSCFG_ARCH_FPU_VFP_NEON=y
+LOSCFG_ARCH_FPU="neon-vfpv4"
+LOSCFG_ARCH_CORTEX_A7=y
+LOSCFG_ARCH_CPU="cortex-a7"
+
+#
+# Extra Configurations
+#
+# LOSCFG_ARCH_FPU_DISABLE is not set
+LOSCFG_IRQ_USE_STANDALONE_STACK=y
+
+#
+# Kernel
+#
+# LOSCFG_KERNEL_SMP is not set
+LOSCFG_KERNEL_EXTKERNEL=y
+# LOSCFG_KERNEL_CPPSUPPORT is not set
+LOSCFG_KERNEL_CPUP=y
+LOSCFG_CPUP_INCLUDE_IRQ=y
+# LOSCFG_KERNEL_DYNLOAD is not set
+# LOSCFG_KERNEL_VDSO is not set
+# LOSCFG_KERNEL_TICKLESS is not set
+# LOSCFG_KERNEL_TRACE is not set
+LOSCFG_KERNEL_LITEIPC=y
+LOSCFG_KERNEL_PIPE=y
+# LOSCFG_BASE_CORE_HILOG is not set
+
+#
+# Lib
+#
+LOSCFG_LIB_LIBC=y
+LOSCFG_LIB_ZLIB=y
+
+#
+# Compat
+#
+LOSCFG_COMPAT_POSIX=y
+LOSCFG_COMPAT_BSD=y
+
+#
+# FileSystem
+#
+LOSCFG_FS_VFS=y
+# LOSCFG_FS_VFS_BLOCK_DEVICE is not set
+LOSCFG_FILE_MODE=y
+# LOSCFG_FS_FAT is not set
+LOSCFG_FS_RAMFS=y
+LOSCFG_FS_PROC=y
+# LOSCFG_FS_JFFS is not set
+
+#
+# Net
+#
+# LOSCFG_NET_LWIP_SACK is not set
+
+#
+# Debug
+#
+# LOSCFG_COMPILE_DEBUG is not set
+# LOSCFG_PLATFORM_ADAPT is not set
+# LOSCFG_ENABLE_OOM_LOOP_TASK is not set
+# LOSCFG_ENABLE_MAGICKEY is not set
+# LOSCFG_THUMB is not set
+LOSCFG_DEBUG_VERSION=y
+# LOSCFG_DEBUG_KERNEL is not set
+LOSCFG_SHELL=y
+
+#
+# Functionality of Shell
+#
+# LOSCFG_SHELL_LK is not set
+# LOSCFG_SHELL_EXCINFO is not set
+# LOSCFG_EXC_INTERACTION is not set
+# LOSCFG_USER_INIT_DEBUG is not set
+# LOSCFG_SHELL_CMD_DEBUG is not set
+# LOSCFG_MEM_DEBUG is not set
+# LOSCFG_NULL_ADDRESS_PROTECT is not set
+LOSCFG_DRIVERS_HDF_PLATFORM_UART=y
+# LOSCFG_PLATFORM_UART_WITHOUT_VFS is not set
+# LOSCFG_PLATFORM_NO_UART is not set
+
+#
+# Driver
+#
+LOSCFG_DRIVERS=y
+# LOSCFG_DRIVERS_USB is not set
+LOSCFG_DRIVERS_HDF=y
+LOSCFG_DRIVERS_HDF_PLATFORM=y
+# LOSCFG_DRIVERS_HDF_PLATFORM_I2C is not set
+# LOSCFG_DRIVERS_HDF_PLATFORM_SPI is not set
+# LOSCFG_DRIVERS_HDF_PLATFORM_GPIO is not set
+# LOSCFG_DRIVERS_HDF_PLATFORM_WATCHDOG is not set
+# LOSCFG_DRIVERS_HDF_PLATFORM_SDIO is not set
+# LOSCFG_DRIVERS_HDF_PLATFORM_RTC is not set
+# LOSCFG_DRIVERS_HDF_PLATFORM_HISI_SDK is not set
+# LOSCFG_DRIVERS_HDF_WIFI is not set
+# LOSCFG_DRIVERS_HDF_INPUT is not set
+# LOSCFG_DRIVERS_HDF_LCD is not set
+# LOSCFG_DRIVERS_HDF_USB is not set
+LOSCFG_DRIVERS_MEM=y
+# LOSCFG_DRIVERS_MMC is not set
+# LOSCFG_DRIVERS_MTD is not set
+# LOSCFG_DRIVERS_RANDOM is not set
+# LOSCFG_DRIVERS_VIDEO is not set
+# LOSCFG_DRIVERS_HIEVENT is not set
+
+#
+# Security
+#
+LOSCFG_SECURITY=y
+LOSCFG_SECURITY_CAPABILITY=y
+LOSCFG_SECURITY_VID=y
+# LOSCFG_SECURITY_BOOT is not set
+
+#
+# Stack Smashing Protector (SSP) Compiler Feature
+#
+# LOSCFG_CC_NO_STACKPROTECTOR is not set
+# LOSCFG_CC_STACKPROTECTOR is not set
+# LOSCFG_CC_STACKPROTECTOR_STRONG is not set
+LOSCFG_CC_STACKPROTECTOR_ALL=y
diff --git a/tools/build/config/hi3516dv300_clang_release.config b/tools/build/config/hi3516dv300_clang_release.config
index 5fb2798a987ba147a098c56e52ef717bdaded421..4476fd707de90b56369c44afb4445673b0a938a9 100644
--- a/tools/build/config/hi3516dv300_clang_release.config
+++ b/tools/build/config/hi3516dv300_clang_release.config
@@ -15,8 +15,10 @@ LOSCFG_COMPILER_CLANG_LLVM=y
 LOSCFG_PLATFORM="hi3516dv300"
 LOSCFG_PLATFORM_HI3516DV300=y
 # LOSCFG_PLATFORM_HI3518EV300 is not set
+# LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7 is not set
 # LOSCFG_TEE_ENABLE is not set
 LOSCFG_PLATFORM_BSP_GIC_V2=y
+LOSCFG_HRTIMER_ENABLE=y
 LOSCFG_ARCH_ARM=y
 LOSCFG_ARCH_ARM_AARCH32=y
 LOSCFG_ARCH_ARM_V7A=y
diff --git a/tools/build/config/hi3518ev300_clang_release.config b/tools/build/config/hi3518ev300_clang_release.config
index 982d0f53bdc2d8bd4536096710fd6be7269c7453..0d2da7ee1782723b3d0ba5372a5cc30f6a5f17d9 100644
--- a/tools/build/config/hi3518ev300_clang_release.config
+++ b/tools/build/config/hi3518ev300_clang_release.config
@@ -15,7 +15,9 @@ LOSCFG_COMPILER_CLANG_LLVM=y
 LOSCFG_PLATFORM="hi3518ev300"
 # LOSCFG_PLATFORM_HI3516DV300 is not set
 LOSCFG_PLATFORM_HI3518EV300=y
+# LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7 is not set
 LOSCFG_PLATFORM_BSP_GIC_V2=y
+LOSCFG_HRTIMER_ENABLE=y
 LOSCFG_ARCH_ARM=y
 LOSCFG_ARCH_ARM_AARCH32=y
 LOSCFG_ARCH_ARM_V7A=y
diff --git a/tools/build/mk/los_config.mk b/tools/build/mk/los_config.mk
index ff273f2cf1b37d8506709b1c814eac726e58dee2..5839d3e5403f3a5d6cfb186634b1400b6a1f4ab5 100644
--- a/tools/build/mk/los_config.mk
+++ b/tools/build/mk/los_config.mk
@@ -163,8 +163,10 @@ LITEOS_BASELIB += -lbase
 LIB_SUBDIRS       += kernel/base
 LITEOS_KERNEL_INCLUDE   := -I $(LITEOSTOPDIR)/kernel/include
 
+ifeq ($(findstring y, $(LOSCFG_PLATFORM_HI3518EV300)$(LOSCFG_PLATFORM_HI3516DV300)), y)
 LITEOS_BASELIB += -lhi35xx_bsp
 LIB_SUBDIRS += $(LITEOSTOPDIR)/../../vendor/hisi/hi35xx/$(LITEOS_PLATFORM)/config/board/
+endif
 
 ifeq ($(LOSCFG_KERNEL_CPUP), y)
     LITEOS_BASELIB   += -lcpup
@@ -358,7 +360,11 @@ endif
 
 #################################### Net Option End####################################
 LITEOS_DRIVERS_BASE_PATH := $(LITEOSTOPDIR)/../../drivers/liteos
+ifeq ($(findstring y, $(LOSCFG_PLATFORM_HI3518EV300)$(LOSCFG_PLATFORM_HI3516DV300)), y)
 LITEOS_VENDOR_DRIVERS_BASE_PATH := $(LITEOSTOPDIR)/../../vendor/hisi/hi35xx/platform
+else ifeq ($(LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7), y)
+LITEOS_VENDOR_DRIVERS_BASE_PATH := $(LITEOSTOPDIR)/../../device/qemu/arm/platform
+endif
 ################################## Driver Option Begin #################################
 ifeq ($(LOSCFG_DRIVERS_HDF), y)
 include $(LITEOSTOPDIR)/../../drivers/hdf/lite/hdf_lite.mk
@@ -457,7 +463,10 @@ ifeq ($(LOSCFG_COMPILE_DEBUG), y)
     LITEOS_COPTS_OPTION  = -g -gdwarf-2
 else
     ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-        LITEOS_COPTS_OPTMIZE = -Oz -flto
+	# WORKAROUND: Disable LTO to avoid undefined __stack_chk_guard
+	#             problem. "externally_visible" attribute could be
+	#             a fix for that but it is not known to our LLVM.
+        LITEOS_COPTS_OPTMIZE = -Oz #-flto
     else
         LITEOS_COPTS_OPTMIZE = -O2
     endif
diff --git a/tools/build/mk/module.mk b/tools/build/mk/module.mk
index 7c9c015958d8f3a5dca8109b4929cf8254c754c9..e891656869293e1fe61dd247ce1ce31009c49b03 100644
--- a/tools/build/mk/module.mk
+++ b/tools/build/mk/module.mk
@@ -81,7 +81,7 @@ all : $(LIB)
 
 $(LOCAL_COBJS): $(OBJOUT)/%.o: %.c
 	$(HIDE)$(OBJ_MKDIR)
-	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_FLAGS) $(LOCAL_CFLAGS) -c $< -o $@
+	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_INCLUDE) $(LOCAL_FLAGS) $(LOCAL_CFLAGS) -c $< -o $@
 
 $(LOCAL_CPPOBJS): $(OBJOUT)/%.o: %.cpp
 	$(HIDE)$(OBJ_MKDIR)