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69018866d2
When MTE is supported but MTE_ASYMM is not (ID_AA64PFR1_EL1.MTE == 2) ID_AA64PFR1_EL1.MTE_frac == 0xF indicates MTE_ASYNC is unsupported and MTE_frac == 0 indicates it is supported. As MTE_frac was previously unconditionally read as 0 from the guest and user-space, check that using SET_ONE_REG to set it to 0 succeeds but does not change MTE_frac from unsupported (0xF) to supported (0). This is required as values originating from KVM from user-space must be accepted to avoid breaking migration. Also, to allow this MTE field to be tested, enable KVM_ARM_CAP_MTE for the set_id_regs test. No effect on existing tests is expected. Signed-off-by: Ben Horgan <ben.horgan@arm.com> Link: https://lore.kernel.org/r/20250512114112.359087-4-ben.horgan@arm.com Signed-off-by: Marc Zyngier <maz@kernel.org> |
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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.