[U-Boot] [PATCH] firmware: zynqmp: Report error when xilinx_pm_request called from EL3

[Michal Simek]

čt 10. 10. 2019 v 11:13 odesílatel Michal Simek
<michal.simek at xilinx.com> napsal:
>
> Function should report error when called in EL3 context. Also report it as
> error instead 0 (success).
>
> Reported-by: Luca Ceresoli <luca at lucaceresoli.net>
> Signed-off-by: Michal Simek <michal.simek at xilinx.com>
> ---
>
> Based on https://lists.denx.de/pipermail/u-boot/2019-October/385462.html
> series.
> ---
>  drivers/firmware/firmware-zynqmp.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/firmware/firmware-zynqmp.c b/drivers/firmware/firmware-zynqmp.c
> index adcef15e22aa..4911734f6c63 100644
> --- a/drivers/firmware/firmware-zynqmp.c
> +++ b/drivers/firmware/firmware-zynqmp.c
> @@ -156,8 +156,10 @@ int __maybe_unused xilinx_pm_request(u32 api_id, u32 arg0, u32 arg1, u32 arg2,
>          */
>         struct pt_regs regs;
>
> -       if (current_el() == 3)
> -               return 0;
> +       if (current_el() == 3) {
> +               printf("%s: Can't call SMC from EL3 context\n", __func__);
> +               return -EPERM;
> +       }
>
>         regs.regs[0] = PM_SIP_SVC | api_id;
>         regs.regs[1] = ((u64)arg1 << 32) | arg0;
> --
> 2.17.1
>

Applied.
M


-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs