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d471bd853d
Legacy kernels prior to commit4399c03c67("x86/apic: Remove verify_local_APIC()") write the APIC ID of the boot CPU twice to verify a functioning local APIC. This results in APIC acceleration inhibited on these kernels for reason APICV_INHIBIT_REASON_APIC_ID_MODIFIED. Allow the APICV_INHIBIT_REASON_APIC_ID_MODIFIED inhibit reason to be cleared if/when all APICs in xAPIC mode set their APIC ID back to the expected vcpu_id value. Fold the functionality previously in kvm_lapic_xapic_id_updated() into kvm_recalculate_apic_map(), as this allows examining all APICs in one pass. Fixes:3743c2f025("KVM: x86: inhibit APICv/AVIC on changes to APIC ID or APIC base") Signed-off-by: Greg Edwards <gedwards@ddn.com> Link: https://lore.kernel.org/r/20221117183247.94314-1-gedwards@ddn.com Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20230106011306.85230-33-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.