- Update the mitigations= kernel param documentation

- Check the IBPB feature flag before enabling IBPB in firmware calls
 because cloud vendors' fantasy when it comes to creating guest
 configurations is unlimited
 
 - Unexport sev_es_ghcb_hv_call() before 5.19 releases now that HyperV
 doesn't need it anymore
 
 - Remove dead CONFIG_* items
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Merge tag 'x86_urgent_for_v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:

 - Update the 'mitigations=' kernel param documentation

 - Check the IBPB feature flag before enabling IBPB in firmware calls
   because cloud vendors' fantasy when it comes to creating guest
   configurations is unlimited

 - Unexport sev_es_ghcb_hv_call() before 5.19 releases now that HyperV
   doesn't need it anymore

 - Remove dead CONFIG_* items

* tag 'x86_urgent_for_v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  docs/kernel-parameters: Update descriptions for "mitigations=" param with retbleed
  x86/bugs: Do not enable IBPB at firmware entry when IBPB is not available
  Revert "x86/sev: Expose sev_es_ghcb_hv_call() for use by HyperV"
  x86/configs: Update configs in x86_debug.config

kernel/configs/x86_debug.config

@@ -7,12 +7,11 @@ CONFIG_DEBUG_SLAB=y
 CONFIG_DEBUG_KMEMLEAK=y
 CONFIG_DEBUG_PAGEALLOC=y
 CONFIG_SLUB_DEBUG_ON=y
-CONFIG_KMEMCHECK=y
 CONFIG_DEBUG_OBJECTS=y
 CONFIG_DEBUG_OBJECTS_ENABLE_DEFAULT=1
 CONFIG_GCOV_KERNEL=y
 CONFIG_LOCKDEP=y
 CONFIG_PROVE_LOCKING=y
 CONFIG_SCHEDSTATS=y
-CONFIG_VMLINUX_VALIDATION=y
+CONFIG_NOINSTR_VALIDATION=y
 CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y