Re: [Minios-devel] [UNIKRAFT PATCHv5 42/46] plat/kvm: Implement shutdown for Arm64

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

On 10.08.2018 09:08, Wei Chen wrote:
> From: Wei Chen <Wei.Chen@xxxxxxx>
>
> QEMU/KVM provide a PSCI interface for virtual machine on
> Arm64 platform. So we use this interface to implement
> platform system off function.
>
> Signed-off-by: Wei Chen <Wei.Chen@xxxxxxx>
> ---
>   plat/kvm/shutdown.c | 11 ++++++++---
>   1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/plat/kvm/shutdown.c b/plat/kvm/shutdown.c
> index a513df9..56ef89c 100644
> --- a/plat/kvm/shutdown.c
> +++ b/plat/kvm/shutdown.c
> @@ -22,7 +22,8 @@
>    */
>   
>   #include <errno.h>
> -#include <x86/cpu.h>
> +#include <cpu.h>
> +#include <irq.h>
>   #include <uk/print.h>
>   #include <uk/plat/bootstrap.h>
>   
> @@ -38,7 +39,11 @@ void ukplat_terminate(enum ukplat_gstate request __unused)
>          * be 83 ('S', 41 << 1 | 1).
>          */
>         uk_printk("Unikraft halted\n");
> +#if defined(__X86_64__)
>         outw(0x501, 41);
Hum, we should better define the x86 asm code also as system_off with 
cpu.h. Then, this file would stay architecture independent.
> +#elif defined(__ARM_64__)
> +       system_off();
> +#endif
>   
>   	/*
>          * If we got here, there is no way to initiate "shutdown" on virtio
> @@ -49,9 +54,9 @@ void ukplat_terminate(enum ukplat_gstate request __unused)
>   
>   static void cpu_halt(void)
>   {
> -       __asm__ __volatile__("cli; hlt");
> +       local_irq_disable();
>         for (;;)
> -               ;
> +               halt();
>   }
>   
>   int ukplat_suspend(void)
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