MIPS: Add defs & probing of [X]ContextConfig
authorJames Hogan <james.hogan@imgtec.com>
Wed, 11 May 2016 12:50:52 +0000 (13:50 +0100)
committerRalf Baechle <ralf@linux-mips.org>
Fri, 13 May 2016 13:30:25 +0000 (15:30 +0200)
commit4c74c7d01d4fe82d7394ea82fcb40754a1330c8b
treecd76367f5217d0c81d43af9b1d451a54dd6faf59
parent8693f360f0833fd0d51e58b1e801c6891b145104
MIPS: Add defs & probing of [X]ContextConfig

The CP0_[X]ContextConfig registers are present if CP0_Config3.CTXTC or
CP0_Config3.SM are set, and provide more control over which bits of
CP0_[X]Context are set to the faulting virtual address on a TLB
exception.

KVM/VZ will need to be able to save and restore these registers in the
guest context, so add the relevant definitions and probing of the
ContextConfig feature in the root context first.

[ralf@linux-mips.org: resolve merge conflict.]

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13225/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/include/asm/cpu-features.h
arch/mips/include/asm/cpu.h
arch/mips/include/asm/mipsregs.h
arch/mips/kernel/cpu-probe.c