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1851e78362The interface for controlling pointer masking in VS-mode is henvcfg.PMM, which is part of the Ssnpm extension, even though pointer masking in HS-mode is provided by the Smnpm extension. As a result, emulating Smnpm in the guest requires (only) Ssnpm on the host. The guest configures Smnpm through the SBI Firmware Features extension, which KVM does not yet implement, so currently the ISA extension has no visible effect on the guest, and thus it cannot be disabled. Ssnpm is configured using the senvcfg CSR within the guest, so that extension cannot be hidden from the guest without intercepting writes to the CSR. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20241016202814.4061541-10-samuel.holland@sifive.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.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.