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charset="utf-8" Like for PV, 32-bit guests need to invoke the compat handler, not the native one. Fixes: db984809d61b ("hvm: wire up domctl and xsm hypercalls") Signed-off-by: Jan Beulich Reviewed-by: Andrew Cooper --- a/xen/arch/x86/hvm/hypercall.c +++ b/xen/arch/x86/hvm/hypercall.c @@ -138,7 +138,7 @@ static const struct { HYPERCALL(event_channel_op), COMPAT_CALL(sched_op), COMPAT_CALL(set_timer_op), - HYPERCALL(xsm_op), + COMPAT_CALL(xsm_op), HYPERCALL(hvm_op), HYPERCALL(sysctl), HYPERCALL(domctl),