Re: Do we use ARM's system mode in linux kernel

Dhiraj Kumar <dhlinx@gmail.com> wrote:

Hi All,

ARM is running in Supervisor(SVC) Mode in kernel. ARM also has another mode called System(SYS) Mode. I just needed info if linux kernel uses system mode of ARM processor.

Please share information if anyone knows.

Thanks in advance !!!!!

I seriously doubt it. Lots of cpu's have more than 2 modes (ie. Kernel/userspace), but unix and linux have always just used the 2. There used to be realtime kernel's that would use the various modes to enforce prioritization, but as far as I know that was never done with linux. Fyi: those realtime systems probably still do that. My experience/knowledge is way old. Greg -- Sent from my Android phone with K-9 Mail. Please excuse my brevity.