Re: [PATCH 0/3] arm64:msr: Add MSR driver

[Marc Zyngier]

On 2020-11-30 17:48, Rongwei Wang wrote:

> The interfaces of this module is same as MSR module in user space, and 
> to solve
> the problem that ARM platform has no similar MSR module. Using this 
> interface,
> we did some pressure tests to test the stability and security of MSR 
> driver. The
> test results show that the driver will not cause system panic if 
> various
> illegal values and multithreading concurrent access are passed through 
> the
> interface.

It would certainly help if you described what problem you are trying
to solve here. In general, giving userspace access to random system
registers is a pretty bad idea.

Are you trying to validate a CPU? a hypervisor? Or is it just a fun way
to check how many things you can poke before something catches fire?

Thanks,

        M.
--
Jazz is not dead. It just smells funny...