Dear sir,
Last year, I used the rapi-linux-demo.cell to launch a second cell on my 
Raspberry Pi 4 model B. And the memory size of second cell was about 184M.
However, that is not enough to me to execute some test on it. So I try to 
change the size of the cell in the rpi-linux-demo.c, but it failed (maybe 
occupied
 other's memory, I don't know). A good news is, someone fixed this problem. The 
demo can provide 1G memory size, and I git clone the new project.

BUT when I executed the operations same with before, I can not build the 
jailhouse

my operations is:
1. git clone https://github.com/siemens/jailhouse.git
2. sudo make && make modules_install && make install
3. sudo insmod driver/jailhouse.ko
4. sudo jailhouse enable configs/arm64/rpi4.cell 

The 4th step is failed, the error is:
JAILHOUSE_ENABLE: Invalid argument

I don't know why it occurs. Because there are two project on my Raspberry (one 
is new, the other is cloned in last year ), the old one can run properly.
If I can get your generous help, I will appreciate.

Yours sincerely,
Hongpeng Cao. 

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