linux-stable/include/linux/psci.h
David Brazdil 6df3e14436 psci: Add accessor for psci_0_1_function_ids
Make it possible to retrieve a copy of the psci_0_1_function_ids struct.
This is useful for KVM if it is configured to intercept host's PSCI SMCs.

Signed-off-by: David Brazdil <dbrazdil@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20201202184122.26046-7-dbrazdil@google.com
2020-12-04 08:44:24 +00:00

62 lines
1.5 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
*
* Copyright (C) 2015 ARM Limited
*/
#ifndef __LINUX_PSCI_H
#define __LINUX_PSCI_H
#include <linux/arm-smccc.h>
#include <linux/init.h>
#include <linux/types.h>
#define PSCI_POWER_STATE_TYPE_STANDBY 0
#define PSCI_POWER_STATE_TYPE_POWER_DOWN 1
bool psci_tos_resident_on(int cpu);
int psci_cpu_suspend_enter(u32 state);
bool psci_power_state_is_valid(u32 state);
int psci_set_osi_mode(bool enable);
bool psci_has_osi_support(void);
struct psci_operations {
u32 (*get_version)(void);
int (*cpu_suspend)(u32 state, unsigned long entry_point);
int (*cpu_off)(u32 state);
int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
int (*migrate)(unsigned long cpuid);
int (*affinity_info)(unsigned long target_affinity,
unsigned long lowest_affinity_level);
int (*migrate_info_type)(void);
};
extern struct psci_operations psci_ops;
struct psci_0_1_function_ids {
u32 cpu_suspend;
u32 cpu_on;
u32 cpu_off;
u32 migrate;
};
struct psci_0_1_function_ids get_psci_0_1_function_ids(void);
#if defined(CONFIG_ARM_PSCI_FW)
int __init psci_dt_init(void);
#else
static inline int psci_dt_init(void) { return 0; }
#endif
#if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
int __init psci_acpi_init(void);
bool __init acpi_psci_present(void);
bool acpi_psci_use_hvc(void);
#else
static inline int psci_acpi_init(void) { return 0; }
static inline bool acpi_psci_present(void) { return false; }
static inline bool acpi_psci_use_hvc(void) {return false; }
#endif
#endif /* __LINUX_PSCI_H */