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| author | James Hogan <james.hogan@imgtec.com> | 2016-05-11 13:50:52 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-05-13 15:30:25 +0200 |
| commit | f18bdfa191df3947879f93519ce4a4985e5f5fce (patch) | |
| tree | cd76367f5217d0c81d43af9b1d451a54dd6faf59 /arch/mips/kernel/cpu-probe.c | |
| parent | e06a1548f3043febb658b58ec5ccbc7d03a785af (diff) | |
| download | linux-stable-f18bdfa191df3947879f93519ce4a4985e5f5fce.tar.gz linux-stable-f18bdfa191df3947879f93519ce4a4985e5f5fce.tar.bz2 linux-stable-f18bdfa191df3947879f93519ce4a4985e5f5fce.zip | |
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>
Diffstat (limited to 'arch/mips/kernel/cpu-probe.c')
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 8e54d51c14bc..963ce7ef29df 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -687,10 +687,12 @@ static inline unsigned int decode_config3(struct cpuinfo_mips *c) if (config3 & MIPS_CONF3_SM) { c->ases |= MIPS_ASE_SMARTMIPS; - c->options |= MIPS_CPU_RIXI; + c->options |= MIPS_CPU_RIXI | MIPS_CPU_CTXTC; } if (config3 & MIPS_CONF3_RXI) c->options |= MIPS_CPU_RIXI; + if (config3 & MIPS_CONF3_CTXTC) + c->options |= MIPS_CPU_CTXTC; if (config3 & MIPS_CONF3_DSP) c->ases |= MIPS_ASE_DSP; if (config3 & MIPS_CONF3_DSP2P) { |