Re: [edk2-devel] [PATCH] ArmPkg/ArmPsciMpServices Add EFI_NOT_READY return

["Ard Biesheuvel" <ardb@kernel.org>]

On Thu, 29 Jun 2023 at 22:47, Jeff Brasen via groups.io
<jbrasen=nvidia.com@groups.io> wrote:
>
> Add EFI_NOT_READY return if the CPU can not be enabled if the
> processor is already on.
>
> This can occur in normal use if the CPU is still being turned off from
> a previous call when this is called again.
>
> Signed-off-by: Jeff Brasen <jbrasen@nvidia.com>

Acked-by: Ard Biesheuvel <ardb@kernel.org>

I'll queue this up - thanks.

> ---
>  ArmPkg/Drivers/ArmPsciMpServicesDxe/ArmPsciMpServicesDxe.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/ArmPkg/Drivers/ArmPsciMpServicesDxe/ArmPsciMpServicesDxe.c b/ArmPkg/Drivers/ArmPsciMpServicesDxe/ArmPsciMpServicesDxe.c
> index f822a9877c..e7f4223513 100644
> --- a/ArmPkg/Drivers/ArmPsciMpServicesDxe/ArmPsciMpServicesDxe.c
> +++ b/ArmPkg/Drivers/ArmPsciMpServicesDxe/ArmPsciMpServicesDxe.c
> @@ -103,7 +103,9 @@ DispatchCpu (
>
>    ArmCallSmc (&Args);
>
> -  if (Args.Arg0 != ARM_SMC_PSCI_RET_SUCCESS) {
> +  if (Args.Arg0 == ARM_SMC_PSCI_RET_ALREADY_ON) {
> +    Status = EFI_NOT_READY;
> +  } else if (Args.Arg0 != ARM_SMC_PSCI_RET_SUCCESS) {
>      DEBUG ((DEBUG_ERROR, "PSCI_CPU_ON call failed: %d\n", Args.Arg0));
>      Status = EFI_DEVICE_ERROR;
>    }
> --
> 2.25.1
>
>
> 
>
>


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