On 1 September 2012 10:16, Avi Kivity <avi@xxxxxxxxxx> wrote: > On 08/29/2012 11:21 AM, Rusty Russell wrote: >> >> + /* Coprocessor 0 means we want a core register. */ >> >> + if ((u32)reg->id >> KVM_REG_ARM_COPROC_START == 0) >> >> + return set_core_reg(vcpu, reg); >> > >> > ...but if we do go this path, you can't use coprocessor 0 >> > to mean core register -- cp0 could be a valid coprocessor >> > (the ARM ARM reserves cp0..cp7 for "vendor specific features"). >> > Use something outside 0..15. >> >> OK, changed that too (16). > And tomorrow they will add 16. Not possible in the instruction encoding :-) We haven't used anywhere near all the coprocessors (even given we've let the vendors have 0..7, ARM itself uses only 10 and 11 for the FPU, 14 for debug/perf and 15 for system control (and 14 and 15 still have lots of spare space). -- PMM -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
