Merge tag 'x86-urgent-2024-04-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull misc x86 fixes from Ingo Molnar:

 - Follow up fixes for the BHI mitigations code

 - Fix !SPECULATION_MITIGATIONS bug not turning off mitigations as
   expected

 - Work around an APIC emulation bug when the kernel is built with Clang
   and run as a SEV guest

 - Follow up x86 topology fixes

* tag 'x86-urgent-2024-04-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu/amd: Move TOPOEXT enablement into the topology parser
  x86/cpu/amd: Make the NODEID_MSR union actually work
  x86/cpu/amd: Make the CPUID 0x80000008 parser correct
  x86/bugs: Replace CONFIG_SPECTRE_BHI_{ON,OFF} with CONFIG_MITIGATION_SPECTRE_BHI
  x86/bugs: Remove CONFIG_BHI_MITIGATION_AUTO and spectre_bhi=auto
  x86/bugs: Clarify that syscall hardening isn't a BHI mitigation
  x86/bugs: Fix BHI handling of RRSBA
  x86/bugs: Rename various 'ia32_cap' variables to 'x86_arch_cap_msr'
  x86/bugs: Cache the value of MSR_IA32_ARCH_CAPABILITIES
  x86/bugs: Fix BHI documentation
  x86/cpu: Actually turn off mitigations by default for SPECULATION_MITIGATIONS=n
  x86/topology: Don't update cpu_possible_map in topo_set_cpuids()
  x86/bugs: Fix return type of spectre_bhi_state()
  x86/apic: Force native_apic_mem_read() to use the MOV instruction

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