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watchpoint不生效

PMU_study

我想监视ARM A76机器上的指定地址，并在地址加载时输入异常。但是，我做了配置，没有进入异常。
我的步骤如下

1. 设置MDSCR_EL1 KDE和MDE 1使能El1的调试异常;

2. 配置OSLAR_EL1寄存器，解锁OS.

3. 配置DBGWVR0_EL1和DBGWCR0_EL1，并确保将指令存储(LSC == 0b10)到DBGWVR0_EL1中的地址。
我的机器和系统如下
1. ARM A76+Threadx Rtos 
2. 运行程序时的处理器异常是EL1.
我打印了相关寄存器，但是毫无思路，有大佬能提供一点思路吗。
mdscr_el1 40960
DAIF 0
OSLSR_EL1 8
CurrentEL 4
MDSCR_EL1 40960
DBGWVR0_EL1 3491870208
DBGWCR0_EL1 249