zIIP usage:  zIIPs can be defined to General mode or z/VM mode image, as listed in  Table 3-6 on page 135. However, zIIPs are used only by z/OS. Other operating  systems cannot use zIIPs, even if they are defined to the LPAR. z/VM V6R4 and  later support real and virtual zIIPs to guest z/OS systems. All LPAR modes, required characterized PUs, operating systems, and the PU  characterizations that can be configured to an LPAR image are listed in Table 3-7. The  available combinations of dedicated (DED) and shared (SHR) processors are also included.  For all combinations, an LPAR also can include reserved processors that are defined, which  allows for nondisruptive LPAR upgrades. Table 3-7 LPAR mode and PU usage GLYPH<SM590000> General mode is also used to run the z/TPF operating system on dedicated or shared CPs GLYPH<SM590000> CF mode, by loading the CFCC code into the LPAR that is defined as one of the following  types: – Dedicated or shared CPs  – Dedicated or shared ICFs GLYPH<SM590000> Linux only mode to run the following systems: – A Linux on Z operating system, on either of the following types: GLYPH<129> Dedicated or shared IFLs  GLYPH<129> Dedicated or shared CPs – A z/VM operating system, on either of the following types: GLYPH<129> Dedicated or shared IFLs  GLYPH<129> Dedicated or shared CPs GLYPH<SM590000> z/VM mode to run z/VM on dedicated or shared CPs or IFLs, plus zIIPs and ICFs GLYPH<SM590000> Secure Service Container (SSC) mode LPAR can run on dedicated or shared: –C P s –I F L s 136  IBM z15 (8561) Technical Guide LPAR mode PU type Operating systems PUs usage General CPs z/Architecture operating systems Linux on Z CPs DED or CPs SHR CPs  and z IIPs z/OS  z/VM (guest exploitation) CPs DED or zIIPs DED or CPs SHR or zIIPs SHR General  CPs z/TPF CPs DED or CPs SHR Coupling  facility ICFs  or CPs CFCC ICFs DED or ICFs SHR or CPs DED or CPs SHR Linux only IFLs  or  CPs Linux on Z z/VM IFLs DED or IFLs SHR or CPs DED or CPs SHR z/VM CPs, IFLs,  zIIPs, or  ICFs z/VM (V6R4 and later) All PUs must be SHR or DED