MSR_SYSCALL_MASK   19 arch/x86/include/asm/msr-index.h #define MSR_SYSCALL_MASK	0xc0000084 /* EFLAGS mask for syscall */
MSR_SYSCALL_MASK  355 tools/testing/selftests/kvm/include/x86_64/processor.h #define MSR_SYSCALL_MASK	0xc0000084 /* EFLAGS mask for syscall */