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Filename Latest commit message Latest commit date
Sean Christopherson d29a79fa75 KVM: x86: Inject #GP if guest attempts to toggle CR4.LA57 in 64-bit mode 
commit d74fcfc1f0ff4b6c26ecef1f9e48d8089ab4eaac upstream.

Inject a #GP on MOV CR4 if CR4.LA57 is toggled in 64-bit mode, which is
illegal per Intel's SDM:

  CR4.LA57
    57-bit linear addresses (bit 12 of CR4) ... blah blah blah ...
    This bit cannot be modified in IA-32e mode.

Note, the pseudocode for MOV CR doesn't call out the fault condition,
which is likely why the check was missed during initial development.
This is arguably an SDM bug and will hopefully be fixed in future
release of the SDM.

Fixes: fd8cb43373 ("KVM: MMU: Expose the LA57 feature to VM.")
Cc: stable@vger.kernel.org
Reported-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200703021714.5549-1-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-16 08:16:44 +02:00
arch KVM: x86: Inject #GP if guest attempts to toggle CR4.LA57 in 64-bit mode 2020-07-16 08:16:44 +02:00
block block: release bip in a right way in error path 2020-07-16 08:16:36 +02:00
certs
crypto
Documentation
drivers IB/hfi1: Do not destroy link_wq when the device is shut down 2020-07-16 08:16:42 +02:00
fs
include ALSA: compress: fix partial_drain completion state 2020-07-16 08:16:39 +02:00
init
ipc
kernel sched/core: Check cpus_mask, not cpus_ptr in __set_cpus_allowed_ptr(), to fix mask corruption 2020-07-16 08:16:36 +02:00
lib
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net netfilter: conntrack: refetch conntrack after nf_conntrack_update() 2020-07-16 08:16:38 +02:00
samples
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sound ALSA: hda/realtek: Enable headset mic of Acer Veriton N4660G with ALC269VC 2020-07-16 08:16:43 +02:00
tools perf intel-pt: Fix PEBS sample for XMM registers 2020-07-16 08:16:39 +02:00
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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.