drivers/firmware: Expose psci_get_version through psci_ops structure (d68e3ba5) · Commits · 戴 / test

Entry into recent versions of ARM Trusted Firmware will invalidate the CPU branch predictor state in order to protect against aliasing attacks. This patch exposes the PSCI "VERSION" function via psci_ops, so that it can be invoked outside of the PSCI driver where necessary. Acked-by:

Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by:

Will Deacon <will.deacon@arm.com> Signed-off-by:

Catalin Marinas <catalin.marinas@arm.com>

drivers/firmware/psci.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -496,6 +496,8 @@ static void __init psci_init_migrate(void)
		static void __init psci_0_2_set_functions(void)
		{
		pr_info("Using standard PSCI v0.2 function IDs\n");
		psci_ops.get_version = psci_get_version;

		psci_function_id[PSCI_FN_CPU_SUSPEND] =
		PSCI_FN_NATIVE(0_2, CPU_SUSPEND);
		psci_ops.cpu_suspend = psci_cpu_suspend;

include/linux/psci.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -26,6 +26,7 @@ int psci_cpu_init_idle(unsigned int cpu);
		int psci_cpu_suspend_enter(unsigned long index);

		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);

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