MSR_ARCH_CAPABILITIES
msr = rdmsr(MSR_ARCH_CAPABILITIES);
(rdmsr(MSR_ARCH_CAPABILITIES) & ARCH_CAP_IBRS_ALL)) {
cap = rdmsr(MSR_ARCH_CAPABILITIES);
msr = rdmsr(MSR_ARCH_CAPABILITIES);
uint32_t msr = rdmsr(MSR_ARCH_CAPABILITIES);
pmsr32(ci, MSR_ARCH_CAPABILITIES, msr,
msr = rdmsr(MSR_ARCH_CAPABILITIES);