Re: [Minios-devel] [UNIKRAFT PATCHv6 27/37] plat/common: Implement CPU reset for arm64

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

Reviewed-by: Simon Kuenzer <simon.kuenzer@xxxxxxxxx>

On 14.09.2018 09:57, Wei Chen wrote:
> From: Wei Chen <Wei.Chen@xxxxxxx>
>
> Using PSCI despatch function to call PSCI_CPU_RESET
> function to reset CPU.
>
> Signed-off-by: Wei Chen <Wei.Chen@xxxxxxx>
> ---
>   plat/common/arm/cpu_native.c        | 16 ++++++++++++++++
>   plat/common/include/arm/arm64/cpu.h |  1 +
>   2 files changed, 17 insertions(+)
>
> diff --git a/plat/common/arm/cpu_native.c b/plat/common/arm/cpu_native.c
> index e7603ac..1d632a4 100644
> --- a/plat/common/arm/cpu_native.c
> +++ b/plat/common/arm/cpu_native.c
> @@ -32,6 +32,7 @@
>    * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
>    */
>   #include <cpu.h>
> +#include <irq.h>
>   #include <uk/assert.h>
>   #include <arm/cpu_defs.h>
>   
> @@ -43,3 +44,18 @@ void halt(void)
>   {
>         __asm__ __volatile__("wfi");
>   }
> +
> +/* Systems support PSCI >= 0.2 can do system reset from PSCI */
> +void reset(void)
> +{
> +       /*
> +        * NO PSCI or invalid PSCI method, we can't do reset, just
> +        * halt the CPU.
> +        */
> +       if (!smcc_psci_call) {
> +               uk_printd(DLVL_CRIT, "Couldn't reset system, HALT!\n");
> +               __CPU_HALT();
> +       }
> +
> +       smcc_psci_call(PSCI_FNID_SYSTEM_RESET, 0, 0, 0);
> +}
> diff --git a/plat/common/include/arm/arm64/cpu.h 
> b/plat/common/include/arm/arm64/cpu.h
> index 6fd2a16..ccbe21d 100644
> --- a/plat/common/include/arm/arm64/cpu.h
> +++ b/plat/common/include/arm/arm64/cpu.h
> @@ -116,3 +116,4 @@ int32_t smcc_psci_smc_call(uint32_t, uint64_t, uint64_t, 
> uint64_t);
>   
>   /* CPU native APIs */
>   void halt(void);
> +void reset(void);
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