| From 3cff35bc630d64b3e63a939ee91a86f80da415e9 Mon Sep 17 00:00:00 2001 |
| From: Geert Uytterhoeven <geert+renesas@glider.be> |
| Date: Mon, 5 Dec 2016 11:39:39 +0100 |
| Subject: [PATCH 088/255] ARM: shmobile: apmu: Allow booting secondary CPU |
| cores in debug mode |
| |
| Now debug resource reset is handled properly, allow booting secondary |
| CPU cores when hardware debug mode is enabled (MD21=1) on SoCs using the |
| "renesas,apmu" enable method. |
| |
| Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> |
| Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp> |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| (cherry picked from commit d03c8f78d03af2a46127537dd1daa67164e53c09) |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| --- |
| arch/arm/mach-shmobile/platsmp-apmu.c | 14 +------------- |
| 1 file changed, 1 insertion(+), 13 deletions(-) |
| |
| --- a/arch/arm/mach-shmobile/platsmp-apmu.c |
| +++ b/arch/arm/mach-shmobile/platsmp-apmu.c |
| @@ -216,21 +216,9 @@ static void __init shmobile_smp_apmu_pre |
| rcar_gen2_pm_init(); |
| } |
| |
| -static int shmobile_smp_apmu_boot_secondary_md21(unsigned int cpu, |
| - struct task_struct *idle) |
| -{ |
| - /* Error out when hardware debug mode is enabled */ |
| - if (rcar_gen2_read_mode_pins() & BIT(21)) { |
| - pr_warn("Unable to boot CPU%u when MD21 is set\n", cpu); |
| - return -ENOTSUPP; |
| - } |
| - |
| - return shmobile_smp_apmu_boot_secondary(cpu, idle); |
| -} |
| - |
| static struct smp_operations apmu_smp_ops __initdata = { |
| .smp_prepare_cpus = shmobile_smp_apmu_prepare_cpus_dt, |
| - .smp_boot_secondary = shmobile_smp_apmu_boot_secondary_md21, |
| + .smp_boot_secondary = shmobile_smp_apmu_boot_secondary, |
| #ifdef CONFIG_HOTPLUG_CPU |
| .cpu_can_disable = shmobile_smp_cpu_can_disable, |
| .cpu_die = shmobile_smp_apmu_cpu_die, |
