MSR_ISF           138 arch/powerpc/include/asm/reg.h #define __MSR		(MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_ISF |MSR_HV)
MSR_ISF           206 arch/powerpc/kvm/book3s_pr.c 	smsr |= MSR_ISF | MSR_HV;