Re: [Xen-devel] [PATCH 09/10] x86/hvm: pkeys, add pkeys support for guest_walk_tables

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 16/11/15 10:31, Huaitong Han wrote:
>  #if GUEST_PAGING_LEVELS >= 4 /* 64-bit only... */
> diff --git a/xen/include/asm-x86/guest_pt.h b/xen/include/asm-x86/guest_pt.h
> index f8a0d76..1c0f050 100644
> --- a/xen/include/asm-x86/guest_pt.h
> +++ b/xen/include/asm-x86/guest_pt.h
> @@ -154,6 +154,17 @@ static inline u32 guest_l4e_get_flags(guest_l4e_t gl4e)
>  { return l4e_get_flags(gl4e); }
>  #endif
>  
> +static inline u32 guest_l1e_get_pkeys(guest_l1e_t gl1e)
> +{ return l1e_get_pkeys(gl1e); }
> +static inline u32 guest_l2e_get_pkeys(guest_l2e_t gl2e)
> +{ return l2e_get_pkeys(gl2e); }
> +static inline u32 guest_l3e_get_pkeys(guest_l3e_t gl3e)
> +{ return l3e_get_pkeys(gl3e); }
> +#if GUEST_PAGING_LEVELS >= 4
> +static inline u32 guest_l4e_get_pkeys(guest_l4e_t gl4e)
> +{ return l4e_get_pkeys(gl4e); }
> +#endif

Actually, the manual indicates that protection keys only exist in L3, L2
and L1 entries.  Therefore, guest_l4e_get_pkeys() is not valid and
should be removed, as should l4e_get_pkeys() in patch 6.

~Andrew

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