Re: [PATCH 3/3] RISC-V: Add arch functions to support hibernation/suspend-to-disk

[Pavel Machek]

Hi!

> @@ -21,6 +21,11 @@ struct suspend_context {
>  #endif
>  };
>  
> +/* This parameter will be assigned to 0 during resume and will be used by
> + * hibernation core for the subsequent resume sequence
> + */
> +extern int in_suspend;

"/*" should be on separate line. (This occurs multiple times.)

> +ENTRY(core_restore_code)
> +	/* switch to temp page table */
> +	csrw satp, s1
> +	sfence.vma
> +	beqz	s4, done
> +loop:
> +	/* The below code will restore the hibernated image. */
> +	ld	a1, HIBERN_PBE_ADDR(s4)
> +	ld	a0, HIBERN_PBE_ORIG(s4)
> +
> +	lui     a4, 0x1
> +	add     a4, a4, a0

Do you have enough registers to move a4 = 0x1 assignment before the
loop:?

> +static int __init riscv_hibernate__init(void)
> +{
> +	hibernate_cpu_context = kcalloc(1, sizeof(struct suspend_context), GFP_KERNEL);
> +

kzalloc?

> +	if (WARN_ON(!hibernate_cpu_context))
> +		return -ENOMEM;
> +
> +	return 0;
> +}
> +
> +early_initcall(riscv_hibernate__init);

Does this really need to be done early?

Best regards,
								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

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