Re: [PATCH v2 7/8] xen/riscv: print hello message from C env

[Alistair Francis <alistair23@xxxxxxxxx>]

On Tue, Jan 10, 2023 at 1:47 AM Oleksii Kurochko
<oleksii.kurochko@xxxxxxxxx> wrote:
>
> Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>

Reviewed-by: Alistair Francis <alistair.francis@xxxxxxx>

Alistair

> ---
>  xen/arch/riscv/riscv64/head.S |  4 +---
>  xen/arch/riscv/setup.c        | 12 ++++++++++++
>  2 files changed, 13 insertions(+), 3 deletions(-)
>
> diff --git a/xen/arch/riscv/riscv64/head.S b/xen/arch/riscv/riscv64/head.S
> index c1f33a1934..d444dd8aad 100644
> --- a/xen/arch/riscv/riscv64/head.S
> +++ b/xen/arch/riscv/riscv64/head.S
> @@ -5,6 +5,4 @@ ENTRY(start)
>          li      t0, STACK_SIZE
>          add     sp, sp, t0
>
> -_start_hang:
> -        wfi
> -        j       _start_hang
> +        tail    start_xen
> diff --git a/xen/arch/riscv/setup.c b/xen/arch/riscv/setup.c
> index 41ef4912bd..586060c7e5 100644
> --- a/xen/arch/riscv/setup.c
> +++ b/xen/arch/riscv/setup.c
> @@ -1,6 +1,18 @@
>  #include <xen/init.h>
>  #include <xen/compile.h>
>
> +#include <asm/early_printk.h>
> +
>  /* Xen stack for bringing up the first CPU. */
>  unsigned char __initdata cpu0_boot_stack[STACK_SIZE]
>      __aligned(STACK_SIZE);
> +
> +void __init noreturn start_xen(void)
> +{
> +    early_printk("Hello from C env\n");
> +
> +    for ( ;; )
> +        asm volatile ("wfi");
> +
> +    unreachable();
> +}
> --
> 2.38.1
>
>