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574ef752d4
KVM allows VMMs to specify the maximum possible APIC ID for a virtual machine through KVM_CAP_MAX_VCPU_ID capability so as to limit data structures related to APIC/x2APIC. Utilize the same to set the AVIC physical max index in the VMCB, similar to VMX. This helps hardware limit the number of entries to be scanned in the physical APIC ID table speeding up IPI broadcasts for virtual machines with smaller number of vCPUs. Unlike VMX, SVM AVIC requires a single page to be allocated for the Physical APIC ID table and the Logical APIC ID table, so retain the existing approach of allocating those during VM init. Signed-off-by: Naveen N Rao (AMD) <naveen@kernel.org> Link: https://lore.kernel.org/r/adb07ccdb3394cd79cb372ba6bcc69a4e4d4ef54.1757009416.git.naveen@kernel.org Signed-off-by: Sean Christopherson <seanjc@google.com> |
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| README | ||
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 reStructuredText 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.