Re: Re-enabling xsave

[Maxime Villard <max%m00nbsd.net@localhost>]

Le 07/11/2017 à 21:06, coypu%sdf.org@localhost a écrit :
>   Index: identcpu.c
>   ===================================================================
>   RCS file: /cvsroot/src/sys/arch/x86/x86/identcpu.c,v
>   retrieving revision 1.64
>   diff -u -r1.64 identcpu.c
>   --- identcpu.c	3 Nov 2017 16:21:01 -0000	1.64
>   +++ identcpu.c	5 Nov 2017 17:11:12 -0000
>   @@ -771,12 +771,7 @@
>    	if (descs[2] > 512)
>    		x86_fpu_save_size = descs[2];
>    
>   -#ifdef XEN
>   -	/* Don't use xsave, force fxsave with x86_xsave_features = 0. */
>   -	x86_fpu_save = FPU_SAVE_FXSAVE;
>   -#else
>    	x86_xsave_features = (uint64_t)descs[3] << 32 | descs[0];
>   -#endif
>    }
>    
>    void

this can't work as-is, you also need to set bits in cr4 and xcr0, and fix
mxcsr_mask