Intel PPIN (Protected Processor Inventory Number): IA32_PPIN_CTL ( 04Eh) and IA32_PPIN ( 04Fh) MSRs. IPRED_DIS prevents instructions at an indirect branch target from speculatively executing until the branch target address is resolved. This bit can be probed by the guest software to detect whether they are running inside a virtual machine. To enable fast (non-serializing) access mode for the IA32_HWP_REQUEST MSR on CPUs that support it, it is necessary to set bit 0 of the FAST_UNCORE_MSRS_CTL( 657h) MSR. This is done by defining a series of state-components, each with a size and offset within a given save area, and each corresponding to a subset of the state needed for one CPU extension or another.

ACE v2 present: REP XCRYPTCTR instruction, as well as support for digest mode and misaligned data for ACE's REP XCRYPT* instructions. Said to be incorporated into the Intel 64 and IA-32 Architectures Software Developer's Manual in 2013, but as of July 2014 [update] the manual still directs the reader to note 485. In the Motorola 680x0 family — that never had a CPUID instruction of any kind — certain specific instructions required elevated privileges.until SP6 did not boot properly unless this bit was set, [4] but later versions of Windows do not need it, so basic leaves greater than 4 can be assumed visible on current Windows systems.

g. AVX-512 vector registers), and supervisor-state (state items that affect the application but are not directly user-visible, e. Many of the bits in EDX (bits 0 through 9, 12 through 17, 23, and 24) are duplicates of EDX from the EAX=1 leaf - these bits are highlighted in light yellow.

CPUID leaves greater than 3 but less than 80000000 are accessible only when the model-specific registers have IA32_MISC_ENABLE.

Equipped with a high-performance 6x optical system crafted with low-dispersion glass, it delivers crystal-clear clarity. but have been removed from later Intel documentation even though some of them have been used in Intel CPUs (e. else { Span < int > raw = stackalloc int [ 12 ]; ( raw [ 0 ], raw [ 1 ], raw [ 2 ], raw [ 3 ]) = X86Base .For each of the four registers (EAX,EBX,ECX,EDX), if bit 31 is set, then the register should not be considered to contain valid descriptors (e. My deftun msrx6 bt worked last week when I received it but last night someone turned it on and now the codes have reset or something.