Re: [Xen-devel] [PATCH v5 05/12] x86: provide executable fixmap facility

[Wei Liu <wl@xxxxxxx>]

On Wed, Jan 29, 2020 at 08:20:27PM +0000, Wei Liu wrote:
>  
> +void __set_fixmap_x(
> +    enum fixed_addresses_x idx, unsigned long mfn, unsigned long flags)
> +{
> +    BUG_ON(idx >= __end_of_fixed_addresses_x || idx <= FIX_X_RESERVED);
> +    map_pages_to_xen(__fix_x_to_virt(idx), _mfn(mfn), 1, flags);
> +
> +    /* Generate a symbol to be used in linker script */
> +    asm ( ".equ FIXADDR_X_SIZE, %c0; .global FIXADDR_X_SIZE"
> +          :: "i" (__end_of_fixed_addresses_x << PAGE_SHIFT) );

The (__end << SHIFT) part can be replaced with FIXADDR_X_SIZE (the macro
defined in fixmap.h) directly.

Wei.

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