Messages in this thread Patch in this message | | | Date | Thu, 4 Jan 2018 16:10:08 +0000 | From | Lorenzo Pieralisi <> | Subject | Re: [PATCH 05/11] drivers/firmware: Expose psci_get_version through psci_ops structure |
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On Thu, Jan 04, 2018 at 03:08:29PM +0000, Will Deacon wrote: > 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. > > Signed-off-by: Will Deacon <will.deacon@arm.com> > --- > drivers/firmware/psci.c | 2 ++ > include/linux/psci.h | 1 + > 2 files changed, 3 insertions(+)
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c > index d687ca3d5049..8b25d31e8401 100644 > --- a/drivers/firmware/psci.c > +++ b/drivers/firmware/psci.c > @@ -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; > diff --git a/include/linux/psci.h b/include/linux/psci.h > index bdea1cb5e1db..6306ab10af18 100644 > --- a/include/linux/psci.h > +++ b/include/linux/psci.h > @@ -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); > -- > 2.1.4 >
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