diff options
| author | Abhimanyu Kapur <abhimany@codeaurora.org> | 2014-02-08 00:45:00 -0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-22 11:10:12 -0700 |
| commit | e38a985cba26ed5a3cb3c1b1bc4be2ff5d220630 (patch) | |
| tree | 6de8bbf88c7b32b63ef9b77da39eebb6f23cf842 /arch/arm64/kernel/smp.c | |
| parent | 1e97815c3dfbc9311429022b6d46f6011184aac0 (diff) | |
arm64: smp: Add wakeup IPI support
Add support for IPI_WAKEUP which is used by hotplug code
path to wake up CPU from low power states.
Change-Id: I258d05e109a377613064624a5bfda21ab8ea9869
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>
[satyap@codeaurora.org: trivial merge conflict resolution]
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
Diffstat (limited to 'arch/arm64/kernel/smp.c')
| -rw-r--r-- | arch/arm64/kernel/smp.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 60946e1c30cf..b76b4b096694 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -70,6 +70,7 @@ enum ipi_msg_type { IPI_CPU_STOP, IPI_TIMER, IPI_IRQ_WORK, + IPI_WAKEUP, }; /* @@ -629,6 +630,7 @@ static const char *ipi_types[NR_IPI] __tracepoint_string = { S(IPI_CPU_STOP, "CPU stop interrupts"), S(IPI_TIMER, "Timer broadcast interrupts"), S(IPI_IRQ_WORK, "IRQ work interrupts"), + S(IPI_WAKEUP, "CPU wakeup interrupts"), }; static void smp_cross_call(const struct cpumask *target, unsigned int ipinr) @@ -677,6 +679,11 @@ void arch_send_call_function_single_ipi(int cpu) smp_cross_call(cpumask_of(cpu), IPI_CALL_FUNC); } +void arch_send_wakeup_ipi_mask(const struct cpumask *mask) +{ + smp_cross_call(mask, IPI_WAKEUP); +} + #ifdef CONFIG_IRQ_WORK void arch_irq_work_raise(void) { @@ -758,6 +765,9 @@ void handle_IPI(int ipinr, struct pt_regs *regs) break; #endif + case IPI_WAKEUP: + break; + default: pr_crit("CPU%u: Unknown IPI message 0x%x\n", cpu, ipinr); break; |