On Wed, 2 Nov 2016, Matt Redfearn wrote: > The MIPS remote processor driver allows non-Linux firmware to take > control of and execute on one of the systems VPEs. The CPU must be > offlined from Linux first. A sysfs interface is created which allows > firmware to be loaded and changed at runtime. A full description is > available at [1]. An example firmware that can be used with this driver > is available at [2]. > > This is useful to allow running bare metal code, or an RTOS, on one or > more CPUs while allowing Linux to continue running on those remaining. And how is actually guaranteed that these two things are properly seperated (memory, devices, interrupts etc.) ? We have rejected attempts to do exactly the same thing on x86 in the past. There is virtualization and NOHZ_FULL to do it proper and not just with a horrible hackery. Thanks, tglx
