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Always block INIT and SIPI events for the TDX guest because the TDX module doesn't provide API for VMM to inject INIT IPI or SIPI. TDX defines its own vCPU creation and initialization sequence including multiple seamcalls. Also, it's only allowed during TD build time. Given that TDX guest is para-virtualized to boot BSP/APs, normally there shouldn't be any INIT/SIPI event for TDX guest. If any, three options to handle them: 1. Always block INIT/SIPI request. 2. (Silently) ignore INIT/SIPI request during delivery. 3. Return error to guest TDs somehow. Choose option 1 for simplicity. Since INIT and SIPI are always blocked, INIT handling and the OP vcpu_deliver_sipi_vector() won't be called, no need to add new interface or helper function for INIT/SIPI delivery. Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com> Co-developed-by: Binbin Wu <binbin.wu@linux.intel.com> Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com> Message-ID: <20250222014757.897978-10-binbin.wu@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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.