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1f66590d7f
When making runtime CPUID updates, change OSXSAVE and OSPKE even if their respective base features (XSAVE, PKU) are not supported by the host. KVM already incorporates host support in the vCPU's effective reserved CR4 bits. I.e. OSXSAVE and OSPKE can be set if and only if the host supports them. And conversely, since KVM's ABI is that KVM owns the dynamic OS feature flags, clearing them when they obviously aren't supported and thus can't be enabled is arguably a fix. Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com> Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com> Link: https://lore.kernel.org/r/20241128013424.4096668-48-seanjc@google.com 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.