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authorPaul Burton2016-05-17 15:31:05 +0100
committerRalf Baechle2016-05-28 12:35:03 +0200
commitd642e4e7b42f379fb9383ef1505f9d67895fb815 (patch)
tree39ef96df7136e10f0f75127464fa3e65587603cd /arch/mips/kernel
parent640356a48750ff9ef3303d85158ef9c42c3a18b6 (diff)
MIPS: smp-cps: Clear Status IPL field when using EIC
When using an external interrupt controller (EIC) the interrupt mask bits in the cop0 Status register are reused for the Interrupt Priority Level, and any interrupts with a priority lower than the field will be ignored. Clear the field to 0 by default such that all interrupts are serviced. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Reviewed-by: Matt Redfearn <matt.redfearn@imgtec.com> Tested-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Qais Yousef <qsyousef@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/13273/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/smp-cps.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/mips/kernel/smp-cps.c b/arch/mips/kernel/smp-cps.c
index 1061bd2e7e9c..4ed36f288d64 100644
--- a/arch/mips/kernel/smp-cps.c
+++ b/arch/mips/kernel/smp-cps.c
@@ -359,8 +359,12 @@ static void cps_init_secondary(void)
BUG_ON(ident != mips_cm_vp_id(smp_processor_id()));
}
- change_c0_status(ST0_IM, STATUSF_IP2 | STATUSF_IP3 | STATUSF_IP4 |
- STATUSF_IP5 | STATUSF_IP6 | STATUSF_IP7);
+ if (cpu_has_veic)
+ clear_c0_status(ST0_IM);
+ else
+ change_c0_status(ST0_IM, STATUSF_IP2 | STATUSF_IP3 |
+ STATUSF_IP4 | STATUSF_IP5 |
+ STATUSF_IP6 | STATUSF_IP7);
}
static void cps_smp_finish(void)