From: David Daney <david.daney@xxxxxxxxxx>
This returns the CPUNum from the low order Ebase bits.
Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
Signed-off-by: Andreas Herrmann <andreas.herrmann@xxxxxxxxxxxxxxxxxx>
---
arch/mips/include/asm/mipsregs.h | 9 +++++++++
arch/mips/kernel/cpu-probe.c | 2 +-
2 files changed, 10 insertions(+), 1 deletion(-)
[andreas.herrmann:
* Renamed function from mips_cpunum
* Make use of function in cpu-probe.c]
diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index fb2d174..98e9754 100644
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -1792,6 +1792,15 @@ __BUILD_SET_C0(brcm_cmt_ctrl)
__BUILD_SET_C0(brcm_config)
__BUILD_SET_C0(brcm_mode)
+/*
+ * Return low 10 bits of ebase.
+ * Note that under KVM (MIPSVZ) this returns vcpu id.
+ */
+static inline unsigned int get_ebase_cpunum(void)
+{
+ return read_c0_ebase() & 0x3ff;
+}
+
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_MIPSREGS_H */
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index e8638c5..dfc6f62 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -423,7 +423,7 @@ static void decode_configs(struct cpuinfo_mips *c)
#ifndef CONFIG_MIPS_CPS
if (cpu_has_mips_r2) {
- c->core = read_c0_ebase() & 0x3ff;
+ c->core = get_ebase_cpunum();
if (cpu_has_mipsmt)
c->core >>= fls(core_nvpes()) - 1;
}
--
1.7.9.5
