Re: [PATCH v2 23/39] xen/riscv: introduce asm/guest_access.h

[Jan Beulich <jbeulich@suse.com>]

On 24.11.2023 11:30, Oleksii Kurochko wrote:
> --- /dev/null
> +++ b/xen/arch/riscv/include/asm/guest_access.h
> @@ -0,0 +1,29 @@
> +#ifndef __ASM_RISCV_GUEST_ACCESS_H__
> +#define __ASM_RISCV_GUEST_ACCESS_H__
> +
> +#include <xen/types.h>
> +
> +unsigned long raw_copy_to_guest(void *to, const void *from, unsigned len);
> +unsigned long raw_copy_from_guest(void *to, const void *from, unsigned len);

For the full build to work, you will need to implement these somewhere.
From the titles of further patches I can't guess where that would be.
Note how PPC has decided to have these be inline dummies for the time
being. It also looks as if you would also need raw_clear_guest()?

> +#define __raw_copy_to_guest raw_copy_to_guest
> +#define __raw_copy_from_guest raw_copy_from_guest
> +
> +#define guest_handle_okay(hnd, nr) (1)
> +#define guest_handle_subrange_okay(hnd, first, last) (1)

Arm has a comment next to these (actually two, I mean the latter), which
I think would be sensible to also have here.

> +struct domain;
> +unsigned long copy_to_guest_phys(struct domain *d,
> +                                 paddr_t gpa,
> +                                 void *buf,
> +                                 unsigned int len);

You don't need this just yet, do you?

Jan