From: slash.tmp@free•fr (Mason)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH] ARM: tango: add HOTPLUG_CPU support
Date: Wed, 15 Jun 2016 17:19:47 +0200 [thread overview]
Message-ID: <57617213.9030804@free.fr> (raw)
From: Marc Gonzalez <marc_gonzalez@sigmadesigns•com>
cpu_die() and cpu_kill() are implemented in firmware.
Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns•com>
---
arch/arm/mach-tango/platsmp.c | 17 +++++++++++++++++
arch/arm/mach-tango/smc.h | 4 +++-
2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-tango/platsmp.c b/arch/arm/mach-tango/platsmp.c
index a21f55e000d2..ff495f6b6f40 100644
--- a/arch/arm/mach-tango/platsmp.c
+++ b/arch/arm/mach-tango/platsmp.c
@@ -9,8 +9,25 @@ static int tango_boot_secondary(unsigned int cpu, struct task_struct *idle)
return 0;
}
+#ifdef CONFIG_HOTPLUG_CPU
+static int tango_cpu_kill(unsigned int cpu)
+{
+ return tango_aux_core_kill(cpu);
+}
+
+static void tango_cpu_die(unsigned int cpu)
+{
+ tango_aux_core_die(cpu);
+}
+#else
+#define tango_cpu_kill NULL
+#define tango_cpu_die NULL
+#endif
+
static const struct smp_operations tango_smp_ops __initconst = {
.smp_boot_secondary = tango_boot_secondary,
+ .cpu_kill = tango_cpu_kill,
+ .cpu_die = tango_cpu_die,
};
CPU_METHOD_OF_DECLARE(tango4_smp, "sigma,tango4-smp", &tango_smp_ops);
diff --git a/arch/arm/mach-tango/smc.h b/arch/arm/mach-tango/smc.h
index 7a4af35cc390..3d31f984f44c 100644
--- a/arch/arm/mach-tango/smc.h
+++ b/arch/arm/mach-tango/smc.h
@@ -2,4 +2,6 @@ extern int tango_smc(unsigned int val, unsigned int service);
#define tango_set_l2_control(val) tango_smc(val, 0x102)
#define tango_start_aux_core(val) tango_smc(val, 0x104)
-#define tango_set_aux_boot_addr(val) tango_smc((unsigned int)val, 0x105)
+#define tango_set_aux_boot_addr(val) tango_smc(val, 0x105)
+#define tango_aux_core_die(val) tango_smc(val, 0x121)
+#define tango_aux_core_kill(val) tango_smc(val, 0x122)
--
2.8.2
reply other threads:[~2016-06-15 15:19 UTC|newest]
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