mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-10 20:02:10 -04:00
6205257395
Drop the manual pfn look when retrying an instruction that KVM failed to emulation in response to a #PF due to a write-protected gfn. Now that KVM sets EMULTYPE_ALLOW_RETRY_PF if and only if the page fault hit a write- protected gfn, i.e. if and only if there's a writable memslot, there's no need to redo the lookup to avoid retrying an instruction that failed on emulated MMIO (no slot, or a write to a read-only slot). I.e. KVM will never attempt to retry an instruction that failed on emulated MMIO, whereas that was not the case prior to the introduction of RET_PF_WRITE_PROTECTED. Reviewed-by: Yuan Yao <yuan.yao@intel.com> Link: https://lore.kernel.org/r/20240831001538.336683-16-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.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.