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authorMukesh Rathor <mukesh.rathor@oracle.com>2013-12-13 12:45:31 -0500
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2014-01-06 10:43:59 -0500
commitd285d68314af49c4456b71d248e355dd33ae375c (patch)
treeb189dbf02b54ee5688ca5d985c69e955ca99d534 /fs/befs
parentddc416cbc4e34f52bebca027de1c099bd30795f8 (diff)
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xen/pvh: Early bootup changes in PV code (v4).
We don't use the filtering that 'xen_cpuid' is doing because the hypervisor treats 'XEN_EMULATE_PREFIX' as an invalid instruction. This means that all of the filtering will have to be done in the hypervisor/toolstack. Without the filtering we expose to the guest the: - cpu topology (sockets, cores, etc); - the APERF (which the generic scheduler likes to use), see 5e626254206a709c6e937f3dda69bf26c7344f6f "xen/setup: filter APERFMPERF cpuid feature out" - and the inability to figure out whether MWAIT_LEAF should be exposed or not. See df88b2d96e36d9a9e325bfcd12eb45671cbbc937 "xen/enlighten: Disable MWAIT_LEAF so that acpi-pad won't be loaded." - x2apic, see 4ea9b9aca90cfc71e6872ed3522356755162932c "xen: mask x2APIC feature in PV" We also check for vector callback early on, as it is a required feature. PVH also runs at default kernel IOPL. Finally, pure PV settings are moved to a separate function that are only called for pure PV, ie, pv with pvmmu. They are also #ifdef with CONFIG_XEN_PVMMU. Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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