Hi Petar, On Friday 16 May 2014 20:13:34 Petar Jovanovic wrote: > From: Petar Jovanovic <petar.jovano...@imgtec.com> > > From MIPS documentation (Volume III): > > UserLocal Register (CP0 Register 4, Select 2) > Compliance Level: Recommended. > > The UserLocal register is a read-write register that is not interpreted by > the hardware and conditionally readable via the RDHWR instruction. > > This register only exists if the Config3-ULRI register field is set. > > Privileged software may write this register with arbitrary information and > make it accessable to unprivileged software via register 29 (ULR) of the > RDHWR instruction. To do so, bit 29 of the HWREna register must be set to a > 1 to enable unprivileged access to the register. > > Signed-off-by: Petar Jovanovic <petar.jovano...@imgtec.com> > --- > target-mips/cpu.h | 2 ++ > target-mips/helper.h | 1 + > target-mips/op_helper.c | 20 +++++++++++++++++++- > target-mips/translate.c | 43 +++++++++++++++++++++++++++++++++++++++++-- > 4 files changed, 63 insertions(+), 3 deletions(-)
I think you need to add it to cpu_save/cpu_load in target-mips/machine.c too, otherwise snapshotting and live migration may break. Cheers James
