X86_FEATURE_LFENCE_RDTSC
#define barrier_nospec() alternative("", "lfence", X86_FEATURE_LFENCE_RDTSC)
"lfence; rdtsc", X86_FEATURE_LFENCE_RDTSC,
if (!cpu_has(c, X86_FEATURE_LFENCE_RDTSC) && cpu_has(c, X86_FEATURE_XMM2)) {
set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
!boot_cpu_has(X86_FEATURE_LFENCE_RDTSC)) {
set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
(static_cpu_has(X86_FEATURE_LFENCE_RDTSC)
if (cpu_feature_enabled(X86_FEATURE_LFENCE_RDTSC))
{ MSR_AMD64_DE_CFG, X86_FEATURE_LFENCE_RDTSC },