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Per Hyper-V TLFS 5.0b: "The L1 hypervisor may choose to use enlightened VMCSs by writing 1 to the corresponding field in the VP assist page (see section 7.8.7). Another field in the VP assist page controls the currently active enlightened VMCS. Each enlightened VMCS is exactly one page (4 KB) in size and must be initially zeroed. No VMPTRLD instruction must be executed to make an enlightened VMCS active or current. After the L1 hypervisor performs a VM entry with an enlightened VMCS, the VMCS is considered active on the processor. An enlightened VMCS can only be active on a single processor at the same time. The L1 hypervisor can execute a VMCLEAR instruction to transition an enlightened VMCS from the active to the non-active state. Any VMREAD or VMWRITE instructions while an enlightened VMCS is active is unsupported and can result in unexpected behavior." Keep Enlightened VMCS structure for the current L2 guest permanently mapped from struct nested_vmx instead of mapping it every time. Suggested-by: Ladi Prosek <lprosek@redhat.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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| firmware | ||
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| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
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| Makefile | ||
| 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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.