MIPS: Probe for and report hardware virtualization support.

The presence of the MIPS Virtualization Application-Specific Extension
is indicated by CP0_Config3[23].  Probe for this and report it in
/proc/cpuinfo.

Signed-off-by: David Daney <david.daney@cavium.com>
Patchwork: http://patchwork.linux-mips.org/patch/4904/
Signed-off-by: John Crispin <blogic@openwrt.org>

2 files changed, 3 insertions, 0 deletions

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index ba169022fe1d..0c69d1d14080 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -442,6 +442,8 @@ static inline unsigned int decode_config3(struct cpuinfo_mips *c)
                 c->options |= MIPS_CPU_ULRI;
         if (config3 & MIPS_CONF3_ISA)
                 c->options |= MIPS_CPU_MICROMIPS;
+        if (config3 & MIPS_CONF3_VZ)
+                c->ases |= MIPS_ASE_VZ;
 
         return config3 & MIPS_CONF_M;
 }
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index 239ae03f3330..453d55699fef 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -74,6 +74,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
         if (cpu_has_dsp2)       seq_printf(m, "%s", " dsp2");
         if (cpu_has_mipsmt)     seq_printf(m, "%s", " mt");
         if (cpu_has_mmips)      seq_printf(m, "%s", " micromips");
+        if (cpu_has_vz)         seq_printf(m, "%s", " vz");
         seq_printf(m, "\n");
 
         seq_printf(m, "shadow register sets\t: %d\n",