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| author | Ingo Molnar <mingo@kernel.org> | 2015-09-13 12:25:35 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-09-13 12:25:35 +0300 |
| commit | d2bb1d42b95fa88f092623bbb8ed533f316b6a3c (patch) | |
| tree | fb796db809a266906fa358f24f1c07ced4df33f0 /arch/arm/kernel/psci_smp.c | |
| parent | 3bd7617596df560e2cb22ad97888cb42dae39d02 (diff) | |
| parent | 6ff33f3902c3b1c5d0db6b1e2c70b6d76fba357f (diff) | |
| download | linux-d2bb1d42b95fa88f092623bbb8ed533f316b6a3c.tar.xz | |
Merge tag 'v4.3-rc1' into perf/core, to refresh the tree
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm/kernel/psci_smp.c')
| -rw-r--r-- | arch/arm/kernel/psci_smp.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/arch/arm/kernel/psci_smp.c b/arch/arm/kernel/psci_smp.c index 28a1db4da704..61c04b02faeb 100644 --- a/arch/arm/kernel/psci_smp.c +++ b/arch/arm/kernel/psci_smp.c @@ -17,6 +17,8 @@ #include <linux/smp.h> #include <linux/of.h> #include <linux/delay.h> +#include <linux/psci.h> + #include <uapi/linux/psci.h> #include <asm/psci.h> @@ -51,22 +53,34 @@ static int psci_boot_secondary(unsigned int cpu, struct task_struct *idle) { if (psci_ops.cpu_on) return psci_ops.cpu_on(cpu_logical_map(cpu), - __pa(secondary_startup)); + virt_to_idmap(&secondary_startup)); return -ENODEV; } #ifdef CONFIG_HOTPLUG_CPU +int psci_cpu_disable(unsigned int cpu) +{ + /* Fail early if we don't have CPU_OFF support */ + if (!psci_ops.cpu_off) + return -EOPNOTSUPP; + + /* Trusted OS will deny CPU_OFF */ + if (psci_tos_resident_on(cpu)) + return -EPERM; + + return 0; +} + void __ref psci_cpu_die(unsigned int cpu) { - const struct psci_power_state ps = { - .type = PSCI_POWER_STATE_TYPE_POWER_DOWN, - }; + u32 state = PSCI_POWER_STATE_TYPE_POWER_DOWN << + PSCI_0_2_POWER_STATE_TYPE_SHIFT; - if (psci_ops.cpu_off) - psci_ops.cpu_off(ps); + if (psci_ops.cpu_off) + psci_ops.cpu_off(state); - /* We should never return */ - panic("psci: cpu %d failed to shutdown\n", cpu); + /* We should never return */ + panic("psci: cpu %d failed to shutdown\n", cpu); } int __ref psci_cpu_kill(unsigned int cpu) @@ -109,6 +123,7 @@ bool __init psci_smp_available(void) struct smp_operations __initdata psci_smp_ops = { .smp_boot_secondary = psci_boot_secondary, #ifdef CONFIG_HOTPLUG_CPU + .cpu_disable = psci_cpu_disable, .cpu_die = psci_cpu_die, .cpu_kill = psci_cpu_kill, #endif |