MIPS: features: Add initial support for TLBINVF capable cores
New Aptiv cores support the TLBINVF instruction for flushing
the VTLB.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6130/
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index e2b2d20..a284e8c 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -286,6 +286,11 @@
&& cpu_has_tlb)
c->tlbsize += (config4 & MIPS_CONF4_MMUSIZEEXT) * 0x40;
+ if (cpu_has_tlb) {
+ if (((config4 & MIPS_CONF4_IE) >> 29) == 2)
+ c->options |= MIPS_CPU_TLBINV;
+ }
+
c->kscratch_mask = (config4 >> 16) & 0xff;
return config4 & MIPS_CONF_M;