[Xen-devel] [PATCH 2/2] x86/HVM: attempts to emulate FPU insns need to set fpu_initialised

["Jan Beulich" <JBeulich@xxxxxxxx>]

My original way of thinking here was that this would be set anyway at
the point state gets reloaded after the adjustments hvmemul_put_fpu()
does, but the flag should already be set before that - after all the
guest may never again touch the FPU before e.g. getting migrated/saved.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/hvm/emulate.c
+++ b/xen/arch/x86/hvm/emulate.c
@@ -2053,6 +2053,7 @@ static int hvmemul_get_fpu(
          * masking of all exceptions by FNSTENV.)
          */
         save_fpu_enable();
+        curr->fpu_initialised = true;
         curr->fpu_dirtied = true;
         if ( (fpu_ctxt->fcw & 0x3f) != 0x3f )
         {



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