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9b8615c5d3
Snapshot preempted_in_kernel using kvm_arch_vcpu_in_kernel() so that the flag is "accurate" (or rather, consistent and deterministic within KVM) for guests with protected state, and explicitly use preempted_in_kernel when checking if a vCPU was preempted in kernel mode instead of bouncing through kvm_arch_vcpu_in_kernel(). Drop the gnarly logic in kvm_arch_vcpu_in_kernel() that redirects to preempted_in_kernel if the target vCPU is not the "running", i.e. loaded, vCPU, as the only reason that code existed was for the directed yield case where KVM wants to check the CPL of a vCPU that may or may not be loaded on the current pCPU. Cc: Like Xu <like.xu.linux@gmail.com> Reviewed-by: Yuan Yao <yuan.yao@intel.com> Link: https://lore.kernel.org/r/20240110003938.490206-3-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 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.