Commit a94d7020 authored by Elizabeth Oldham's avatar Elizabeth Oldham Committed by Ralf Baechle
Browse files

[MIPS] MT: Fix setting of XTC. 



XTC can only be set if VPA is clear, which it may not be. There is
also the possibility of a back to back c0 register access hazard to
take care of.

Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 6e74bae9

arch/mips/kernel/vpe.c

+6 −0
Original line number Diff line number Diff line
@@ -768,10 +768,16 @@ int vpe_run(struct vpe * v) 
	 */

 	write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | v->minor);



	write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~(VPECONF0_VPA));



	back_to_back_c0_hazard();



        /* Set up the XTC bit in vpeconf0 to point at our tc */

        write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC))

                               | (t->index << VPECONF0_XTC_SHIFT));



	back_to_back_c0_hazard();



        /* enable this VPE */

        write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA);