b4f3a41006
At a first glance the MBA memory region on MSM8916 looks intentionally placed at the fixed address 0x8ea00000. This is what the ELF headers of the firmware specify as base address, and the typical Qualcomm-specific bits suggest the binary is not relocatable. However, on a closer look this is pointless: Unlike other firmware images the hardware expects to have the raw ELF image loaded to the MBA region, including the ELF header (without parsing it at all). This means that we actually just load the ELF header (not the code!) at 0x8ea00000. The real LOAD segments follow at arbitrary aligned addresses depending on the structure of the ELF binary. In practice it looks like we can use an arbitrary 1 MiB-aligned region for MBA. The downstream/vendor kernel just allocates this dynamically at an arbitrary (aligned) address. Drop the pointless fixed address and use the new dynamic reserved memory mechanism to allocate a region close to the others. This reduces gaps in the memory map and provides Linux with more contiguous memory. Signed-off-by: Stephan Gerhold <stephan@gerhold.net> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org> Link: https://lore.kernel.org/r/20230911-msm8916-rmem-v1-5-b7089ec3e3a1@gerhold.net Signed-off-by: Bjorn Andersson <andersson@kernel.org>
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.