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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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e78eef554a
Since PSCI 1.0 allows the SMCCC version to be (indirectly) probed, let's do that at boot time, and expose the version of the calling convention as part of the psci_ops structure. Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Copyright (C) 2015 ARM Limited
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*/
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#ifndef __LINUX_PSCI_H
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#define __LINUX_PSCI_H
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#include <linux/init.h>
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#include <linux/types.h>
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#define PSCI_POWER_STATE_TYPE_STANDBY 0
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#define PSCI_POWER_STATE_TYPE_POWER_DOWN 1
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bool psci_tos_resident_on(int cpu);
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int psci_cpu_init_idle(unsigned int cpu);
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int psci_cpu_suspend_enter(unsigned long index);
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enum psci_conduit {
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PSCI_CONDUIT_NONE,
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PSCI_CONDUIT_SMC,
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PSCI_CONDUIT_HVC,
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};
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enum smccc_version {
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SMCCC_VERSION_1_0,
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SMCCC_VERSION_1_1,
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};
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struct psci_operations {
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u32 (*get_version)(void);
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int (*cpu_suspend)(u32 state, unsigned long entry_point);
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int (*cpu_off)(u32 state);
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int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
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int (*migrate)(unsigned long cpuid);
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int (*affinity_info)(unsigned long target_affinity,
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unsigned long lowest_affinity_level);
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int (*migrate_info_type)(void);
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enum psci_conduit conduit;
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enum smccc_version smccc_version;
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};
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extern struct psci_operations psci_ops;
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#if defined(CONFIG_ARM_PSCI_FW)
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int __init psci_dt_init(void);
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#else
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static inline int psci_dt_init(void) { return 0; }
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#endif
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#if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
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int __init psci_acpi_init(void);
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bool __init acpi_psci_present(void);
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bool acpi_psci_use_hvc(void);
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#else
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static inline int psci_acpi_init(void) { return 0; }
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static inline bool acpi_psci_present(void) { return false; }
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static inline bool acpi_psci_use_hvc(void) {return false; }
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#endif
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#endif /* __LINUX_PSCI_H */
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