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65a4de0ffd
Ensure a full memory barrier is emitted in the VM-Exit path, as a full barrier is required on Intel CPUs to evict WC buffers. This will allow unconditionally honoring guest PAT on Intel CPUs that support self-snoop. As srcu_read_lock() is always called in the VM-Exit path and it internally has a smp_mb(), call smp_mb__after_srcu_read_lock() to avoid adding a second fence and make sure smp_mb() is called without dependency on implementation details of srcu_read_lock(). Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Sean Christopherson <seanjc@google.com> Cc: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Yan Zhao <yan.y.zhao@intel.com> [sean: massage changelog] Tested-by: Xiangfei Ma <xiangfeix.ma@intel.com> Tested-by: Yongwei Ma <yongwei.ma@intel.com> Link: https://lore.kernel.org/r/20240309010929.1403984-5-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.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.