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c803ce3f18
ARMv8R adds support for VBAR and updates ID_PFR1 with the new filed
Sec_frac (bits [23:20]):
Security fractional field. When the Security field is 0000, determines
the support for features from the ARMv7 Security Extensions. Permitted
values are:
0000 No features from the ARMv7 Security Extensions are implemented.
This value is not supported in ARMv8 if ID_PFR1 bits [7:4] are zero.
0001 The implementation includes the VBAR, and the TCR.PD0 and TCR.PD1
bits.
0010 As for 0001, plus the ability to access Secure or Non-secure
physical memory is supported.
All other values are reserved.
This field is only valid when ID_PFR1[7:4] == 0, otherwise it holds
the value 0000.
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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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 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.