提交 d68e3ba5 编写于 作者: W Will Deacon 提交者: Catalin Marinas

drivers/firmware: Expose psci_get_version through psci_ops structure

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: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
上级 0a0d111d
...@@ -496,6 +496,8 @@ static void __init psci_init_migrate(void) ...@@ -496,6 +496,8 @@ static void __init psci_init_migrate(void)
static void __init psci_0_2_set_functions(void) static void __init psci_0_2_set_functions(void)
{ {
pr_info("Using standard PSCI v0.2 function IDs\n"); 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_function_id[PSCI_FN_CPU_SUSPEND] =
PSCI_FN_NATIVE(0_2, CPU_SUSPEND); PSCI_FN_NATIVE(0_2, CPU_SUSPEND);
psci_ops.cpu_suspend = psci_cpu_suspend; psci_ops.cpu_suspend = psci_cpu_suspend;
......
...@@ -26,6 +26,7 @@ int psci_cpu_init_idle(unsigned int cpu); ...@@ -26,6 +26,7 @@ int psci_cpu_init_idle(unsigned int cpu);
int psci_cpu_suspend_enter(unsigned long index); int psci_cpu_suspend_enter(unsigned long index);
struct psci_operations { struct psci_operations {
u32 (*get_version)(void);
int (*cpu_suspend)(u32 state, unsigned long entry_point); int (*cpu_suspend)(u32 state, unsigned long entry_point);
int (*cpu_off)(u32 state); int (*cpu_off)(u32 state);
int (*cpu_on)(unsigned long cpuid, unsigned long entry_point); int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
......
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