e1bca853dd
A bug in legacy U-Boot causes a crash during SDRAM boot if ECC is not enabled in the bitstream but enabled in the Linux config. Memory mapped read of the ECC Enabled bit was only enabled if U-Boot determined ECC was enabled in the bitstream. The Linux driver checks the ECC enable bit using a memory map read. In the ECC disabled bitstream case, U-Boot didn't enable ECC register memory map reads and since they are not allowed this results in a crash. Always read the ECC Enable register through a SMC call which is always allowed and it works with legacy and current U-Boot. [ bp: Massage commit message. ] Signed-off-by: Rabara Niravkumar L <niravkumar.l.rabara@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Dinh Nguyen <dinguyen@kernel.org> Link: https://lore.kernel.org/r/20220305014118.4794-1-niravkumar.l.rabara@intel.com
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.