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We have a KVM_REG_ARM encoding that we use to expose KVM guest registers to userspace. Define that bit 28 in this encoding indicates secure vs nonsecure, so we can distinguish the secure and nonsecure banked versions of a banked AArch32 register. For KVM currently, all guest registers are nonsecure, but defining the bit is useful for userspace. In particular, QEMU uses this encoding as part of its on-the-wire migration format, and needs to be able to describe secure-bank registers when it is migrating (fully emulated) EL3-enabled CPUs. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> |
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| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.