File 5b31e004-x86-HVM-emul-attempts-FPU-set-fpu_initialised.patch of Package xen.openSUSE_Leap_42.3_Update
# Commit 3310e3cd648f3713c824790bd71d8ec405a09d05
# Date 2018-06-26 08:41:08 +0200
# Author Jan Beulich <jbeulich@suse.com>
# Committer Jan Beulich <jbeulich@suse.com>
x86/HVM: attempts to emulate FPU insns need to set fpu_initialised
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@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Paul Durrant <paul.durrant@citrix.com>
--- a/xen/arch/x86/hvm/emulate.c
+++ b/xen/arch/x86/hvm/emulate.c
@@ -1742,6 +1742,7 @@ 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 )
{