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Oliver Upton e65733b5c5 KVM: x86: Redefine 'longmode' as a flag for KVM_EXIT_HYPERCALL
The 'longmode' field is a bit annoying as it blows an entire __u32 to
represent a boolean value. Since other architectures are looking to add
support for KVM_EXIT_HYPERCALL, now is probably a good time to clean it
up.

Redefine the field (and the remaining padding) as a set of flags.
Preserve the existing ABI by using bit 0 to indicate if the guest was in
long mode and requiring that the remaining 31 bits must be zero.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230404154050.2270077-2-oliver.upton@linux.dev
2023-04-05 12:07:41 +01:00
arch KVM: x86: Redefine 'longmode' as a flag for KVM_EXIT_HYPERCALL 2023-04-05 12:07:41 +01:00
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Documentation KVM: x86: Redefine 'longmode' as a flag for KVM_EXIT_HYPERCALL 2023-04-05 12:07:41 +01:00
drivers TTY/Serial driver fixes for 6.3-rc3 2023-03-19 10:09:58 -07:00
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kernel Tracing fixes for 6.3: 2023-03-19 10:46:02 -07:00
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Makefile Linux 6.3-rc3 2023-03-19 13:27:55 -07:00
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.