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firmware/psci: Expose PSCI conduit

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In order to call into the firmware to apply workarounds, it is
useful to find out whether we're using HVC or SMC. Let's expose
this through the psci_ops.

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>
This commit is contained in:
Marc Zyngier
2018-02-06 17:56:16 +00:00
committed by Catalin Marinas
parent f72af90c37
commit 09a8d6d484
2 changed files with 30 additions and 5 deletions
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7
include/linux/psci.h
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@@ -25,6 +25,12 @@ bool psci_tos_resident_on(int cpu);
int psci_cpu_init_idle(unsigned int cpu);
int psci_cpu_suspend_enter(unsigned long index);
enum psci_conduit {
PSCI_CONDUIT_NONE,
PSCI_CONDUIT_SMC,
PSCI_CONDUIT_HVC,
};
struct psci_operations {
u32 (*get_version)(void);
int (*cpu_suspend)(u32 state, unsigned long entry_point);
@@ -34,6 +40,7 @@ struct psci_operations {
int (*affinity_info)(unsigned long target_affinity,
unsigned long lowest_affinity_level);
int (*migrate_info_type)(void);
enum psci_conduit conduit;
};
extern struct psci_operations psci_ops;