irqchip: mips-gic: Setup EIC mode on each CPU if it's in use

When EIC mode is in use (cpu_has_veic is true) enable it on each CPU
during GIC initialisation. Otherwise there may be a mismatch between the
hardware default interrupt model & that expected by the kernel.

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>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13274/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index c089f49..3b5e10a 100644 (file)
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -968,7 +968,7 @@ static void __init __gic_init(unsigned long gic_base_addr,
                              unsigned int cpu_vec, unsigned int irqbase,
                              struct device_node *node)
 {
-       unsigned int gicconfig;
+       unsigned int gicconfig, cpu;
        unsigned int v[2];
 
        __gic_base_addr = gic_base_addr;
@@ -985,6 +985,14 @@ static void __init __gic_init(unsigned long gic_base_addr,
        gic_vpes = gic_vpes + 1;
 
        if (cpu_has_veic) {
+               /* Set EIC mode for all VPEs */
+               for_each_present_cpu(cpu) {
+                       gic_write(GIC_REG(VPE_LOCAL, GIC_VPE_OTHER_ADDR),
+                                 mips_cm_vp_id(cpu));
+                       gic_write(GIC_REG(VPE_OTHER, GIC_VPE_CTL),
+                                 GIC_VPE_CTL_EIC_MODE_MSK);
+               }
+
                /* Always use vector 1 in EIC mode */
                gic_cpu_pin = 0;
                timer_cpu_pin = gic_cpu_pin;