mainlining shenanigans
fce2bc254a
The EFI stub in the ARM kernel runs in the context of the firmware, which means it usually runs with the caches and MMU on. Currently, we relocate the zImage so it appears in the first 128 MiB, disable the MMU and caches and invoke the decompressor via its ordinary entry point. However, since we can pass the base of DRAM directly, there is no need to relocate the zImage, which also means there is no need to disable and re-enable the caches and create new page tables etc. This also allows systems whose DRAM start address is not a round multiple of 128 MB to decompress the kernel proper to the base of memory, ensuring that all memory is usable at runtime. -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEnNKg2mrY9zMBdeK7wjcgfpV0+n0FAl7FbMMACgkQwjcgfpV0 +n15TAgAmWgczY35HCM4Hosv8c7N1xG3HAo5Dn/M6I0twTtAYki33Nb2UgX771sq tkk8eetDCOtDmfGP0ZED/n2EstXIRcpmCl2cqPdZjX/0XrSpUEyyuTZ+jGoaL6Tb l8joWq9cr9aCDd0jIKLdwFhusk+dXJWyyoXguFZnIkwMsTauBeNCwMbuUgTyOFro 6R5iF9CFnWl+yNheNQe/F2QKbsCdExW22gBaR2z3sMCeuJKSviy9nwJZGafmm/+S ySKhFnzREdAdTfk9BEzOm4J3kZFrSOn5YxEOAde/zYB1kcPg/+t0xFdIEu2C0iQp ruTaJmq0YLSr7psZm3CMmMe0P2lBiw== =2BnA -----END PGP SIGNATURE----- Merge tag 'efi-arm-no-relocate-for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux into misc Simplify EFI handover to decompressor The EFI stub in the ARM kernel runs in the context of the firmware, which means it usually runs with the caches and MMU on. Currently, we relocate the zImage so it appears in the first 128 MiB, disable the MMU and caches and invoke the decompressor via its ordinary entry point. However, since we can pass the base of DRAM directly, there is no need to relocate the zImage, which also means there is no need to disable and re-enable the caches and create new page tables etc. This also allows systems whose DRAM start address is not a round multiple of 128 MB to decompress the kernel proper to the base of memory, ensuring that all memory is usable at runtime. |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.