LKML, Re: (PATCH v3 00/21) Enable CET Virtualization, Jun 16, 2023 - provides additional discussion of how the CET-SSS prematurely-busy stack issue interacts with virtualization. These instructions were first introduced on Model 7 [88] - the CPUID bit to indicate their support was moved [89] to EDX bit 11 from Model 8 ( AMD K6-2) onwards.

MTC (Mini Time Counter) timing packets supported, and suppression of COFI (Change of Flow Instructions) packets supported. Descriptor 76h is listed as an 1 MByte L2 cache in rev 37 of Intel AP-485, [58] but as an instruction TLB in rev 38 and all later Intel documentation. Beware that using that older detection method on 2010 and newer Intel processors may overestimate the number of cores and logical processors because the old detection method assumes there are no gaps in the APIC id space, and this assumption is violated by some newer processors (starting with the Core i3 5x0 series), but these newer processors also come with an x2APIC, so their topology can be correctly determined using the EAX=Bh leaf method.Virtual CPU's (hypervisors) set this bit to 1 and physical CPU's (all existing and future CPU's) set this bit to zero.

Topology detection examples involving older (pre-2010) Intel processors that lack x2APIC (thus don't implement the EAX=Bh leaf) are given in a 2010 Intel presentation. The level id space starts at 0 and is continuous, meaning that if a level id is invalid, all higher level ids will also be invalid. However, some versions of the Windows Vista kernel are reported to be checking this bit [43] - if it is set, Vista will recognize it as a "processor channels" feature. With the introduction of the 80386 processor, EDX on reset indicated the revision but this was only readable after reset and there was no standard way for applications to read the value.

Intel's CPUID documentation does not specify the associativity of the ITLB indicated by descriptor 4Fh. 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. The APIC ids are also used in this hierarchy to convey information about how the different levels of cache are shared by the SMT units and cores. Contains some information that can be and was easily misinterpreted though, particularly with respect to processor topology identification. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.

The cache details, including cache type, size, and associativity are communicated via the other registers on leaf 4. Experience the exceptional optical prowess and unmatched light transmission of the Sig Tango MSR LPVO, setting the benchmark for any scenario. Ideal for an apex, flat or pent roof, shed felt and roofing membrane are durable and perfect for a newly built structure or to re-cover existing roofing material. Early revisions of AMD's "Pacifica" documentation listed EAX bit 8 as an always-zero bit reserved for hypervisor use. Hypervisors can use these function numbers to provide an interface to pass information from the hypervisor to the guest.CPUID must be issued with each parameter in sequence to get the entire 48-byte ASCII processor brand string.