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0214f6bbe5
Make vcpu0 the arbitrary owner of the PIT, as was intended when PIT migration was added by commit2f5997140f("KVM: migrate PIT timer"). The PIT was unintentionally turned into being owned by the BSP by commitc5af89b68a("KVM: Introduce kvm_vcpu_is_bsp() function."), and was then unintentionally converted to a shared ownership model when kvm_vcpu_is_bsp() was modified to check the APIC base MSR instead of hardcoding vcpu0 as the BSP. Functionally, this just means the PIT's hrtimer is migrated less often. The real motivation is to remove the usage of kvm_vcpu_is_bsp(), so that more legacy/broken crud can be removed in a future patch. Fixes:58d269d8cc("KVM: x86: BSP in MSR_IA32_APICBASE is writable") Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20210713163324.627647-14-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.