1 files changed, 33 insertions, 12 deletions

diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index e7bcfca4159f..29619f49873a 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c
@@ -108,9 +108,10 @@ bool psci_power_state_is_valid(u32 state)
 	return !(state & ~valid_mask);
 }
 
-static unsigned long __invoke_psci_fn_hvc(unsigned long function_id,
-			unsigned long arg0, unsigned long arg1,
-			unsigned long arg2)
+static __always_inline unsigned long
+__invoke_psci_fn_hvc(unsigned long function_id,
+		     unsigned long arg0, unsigned long arg1,
+		     unsigned long arg2)
 {
 	struct arm_smccc_res res;
 
@@ -118,9 +119,10 @@ static unsigned long __invoke_psci_fn_hvc(unsigned long function_id,
 	return res.a0;
 }
 
-static unsigned long __invoke_psci_fn_smc(unsigned long function_id,
-			unsigned long arg0, unsigned long arg1,
-			unsigned long arg2)
+static __always_inline unsigned long
+__invoke_psci_fn_smc(unsigned long function_id,
+		     unsigned long arg0, unsigned long arg1,
+		     unsigned long arg2)
 {
 	struct arm_smccc_res res;
 
@@ -128,7 +130,7 @@ static unsigned long __invoke_psci_fn_smc(unsigned long function_id,
 	return res.a0;
 }
 
-static int psci_to_linux_errno(int errno)
+static __always_inline int psci_to_linux_errno(int errno)
 {
 	switch (errno) {
 	case PSCI_RET_SUCCESS:
@@ -169,7 +171,8 @@ int psci_set_osi_mode(bool enable)
 	return psci_to_linux_errno(err);
 }
 
-static int __psci_cpu_suspend(u32 fn, u32 state, unsigned long entry_point)
+static __always_inline int
+__psci_cpu_suspend(u32 fn, u32 state, unsigned long entry_point)
 {
 	int err;
 
@@ -177,13 +180,15 @@ static int __psci_cpu_suspend(u32 fn, u32 state, unsigned long entry_point)
 	return psci_to_linux_errno(err);
 }
 
-static int psci_0_1_cpu_suspend(u32 state, unsigned long entry_point)
+static __always_inline int
+psci_0_1_cpu_suspend(u32 state, unsigned long entry_point)
 {
 	return __psci_cpu_suspend(psci_0_1_function_ids.cpu_suspend,
 				  state, entry_point);
 }
 
-static int psci_0_2_cpu_suspend(u32 state, unsigned long entry_point)
+static __always_inline int
+psci_0_2_cpu_suspend(u32 state, unsigned long entry_point)
 {
 	return __psci_cpu_suspend(PSCI_FN_NATIVE(0_2, CPU_SUSPEND),
 				  state, entry_point);
@@ -440,6 +445,9 @@ static const struct file_operations psci_debugfs_ops = {
 
 static int __init psci_debugfs_init(void)
 {
+	if (!invoke_psci_fn || !psci_ops.get_version)
+		return 0;
+
 	return PTR_ERR_OR_ZERO(debugfs_create_file("psci", 0444, NULL, NULL,
 						   &psci_debugfs_ops));
 }
@@ -447,10 +455,12 @@ late_initcall(psci_debugfs_init)
 #endif
 
 #ifdef CONFIG_CPU_IDLE
-static int psci_suspend_finisher(unsigned long state)
+static noinstr int psci_suspend_finisher(unsigned long state)
 {
 	u32 power_state = state;
-	phys_addr_t pa_cpu_resume = __pa_symbol(cpu_resume);
+	phys_addr_t pa_cpu_resume;
+
+	pa_cpu_resume = __pa_symbol_nodebug((unsigned long)cpu_resume);
 
 	return psci_ops.cpu_suspend(power_state, pa_cpu_resume);
 }
@@ -462,11 +472,22 @@ int psci_cpu_suspend_enter(u32 state)
 	if (!psci_power_state_loses_context(state)) {
 		struct arm_cpuidle_irq_context context;
 
+		ct_cpuidle_enter();
 		arm_cpuidle_save_irq_context(&context);
 		ret = psci_ops.cpu_suspend(state, 0);
 		arm_cpuidle_restore_irq_context(&context);
+		ct_cpuidle_exit();
 	} else {
+		/*
+		 * ARM64 cpu_suspend() wants to do ct_cpuidle_*() itself.
+		 */
+		if (!IS_ENABLED(CONFIG_ARM64))
+			ct_cpuidle_enter();
+
 		ret = cpu_suspend(state, psci_suspend_finisher);
+
+		if (!IS_ENABLED(CONFIG_ARM64))
+			ct_cpuidle_exit();
 	}
 
 	return ret;