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35be969d1e
Prepare for a future TDX patch which asserts that atomic zapping (i.e. zapping with mmu_lock taken for read) don't operate on mirror roots. When tearing down a VM, all roots have to be zapped (including mirror roots once they're in place) so do that with the mmu_lock taken for write. kvm_mmu_uninit_tdp_mmu() is invoked either before or after executing any atomic operations on SPTEs by vCPU threads. Therefore, it will not impact vCPU threads performance if kvm_tdp_mmu_zap_invalidated_roots() acquires mmu_lock for write to zap invalid roots. Co-developed-by: Yan Zhao <yan.y.zhao@intel.com> Signed-off-by: Yan Zhao <yan.y.zhao@intel.com> Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com> Message-ID: <20240718211230.1492011-2-rick.p.edgecombe@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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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.