kernel/arch/powerpc/boot/main.c, branch linux-rolling-stable

powerpc: Fix typos

2024-05-07T14:21:30Z

Fix typos, most reported by "codespell arch/powerpc". Only touches comments, no code changes. Signed-off-by: Bjorn Helgaas Signed-off-by: Michael Ellerman Link: https://msgid.link/20240103231605.1801364-8-helgaas@kernel.org

powerpc/boot: Use address-of operator on section symbols

2020-06-30T04:38:00Z

Clang warns: arch/powerpc/boot/main.c:107:18: warning: array comparison always evaluates to a constant [-Wtautological-compare] if (_initrd_end > _initrd_start) { ^ arch/powerpc/boot/main.c:155:20: warning: array comparison always evaluates to a constant [-Wtautological-compare] if (_esm_blob_end <= _esm_blob_start) ^ 2 warnings generated. These are not true arrays, they are linker defined symbols, which are just addresses. Using the address of operator silences the warning and does not change the resulting assembly with either clang/ld.lld or gcc/ld (tested with diff + objdump -Dr). Reported-by: Joel Stanley Signed-off-by: Nathan Chancellor Tested-by: Geoff Levand Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200624035920.835571-1-natechancellor@gmail.com

powerpc: Add support for adding an ESM blob to the zImage wrapper

2019-08-29T23:53:29Z

For secure VMs, the signing tool will create a ticket called the "ESM blob" for the Enter Secure Mode ultravisor call with the signatures of the kernel and initrd among other things. This adds support to the wrapper script for adding that blob via the "-e" option to the zImage.pseries. It also adds code to the zImage wrapper itself to retrieve and if necessary relocate the blob, and pass its address to Linux via the device-tree, to be later consumed by prom_init. Signed-off-by: Benjamin Herrenschmidt [ bauerman: Minor adjustments to some comments. ] Signed-off-by: Thiago Jung Bauermann Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190820021326.6884-4-bauerman@linux.ibm.com

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

powerpc/boot: Fix the early OPAL console wrappers

2016-11-24T06:34:01Z

When configured with CONFIG_PPC_EARLY_DEBUG_OPAL=y the kernel expects the OPAL entry and base addresses to be passed in r8 and r9 respectively. Currently the wrapper does not attempt to restore these values before entering the decompressed kernel which causes the kernel to branch into whatever happens to be in r9 when doing a write to the OPAL console in early boot. This patch adds a platform_ops hook that can be used to branch into the new kernel. The OPAL console driver patches this at runtime so that if the console is used it will be restored just prior to entering the kernel. Fixes: 656ad58ef19e ("powerpc/boot: Add OPAL console to epapr wrappers") Cc: stable@vger.kernel.org # v4.8+ Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman

powerpc/boot: Fix boot on systems with uncompressed kernel image

2016-10-19T09:35:34Z

This commit broke boot on systems with an uncompressed kernel image, namely systems using a cuImage. On such systems the compressed boot image (boot wrapper, uncompressed kernel image, ..) is decompressed by u-boot already, therefore the boot wrapper code sees an uncompressed kernel image. The old decompression code silently assumed an uncompressed kernel image if it found no valid gzip signature, whilst the new code bailed out in this case. Fix this by re-introducing such a fallback if no valid compressed image is found. Fixes: 1b7898ee276b ("Use the pre-boot decompression API") Signed-off-by: Heiner Kallweit Signed-off-by: Michael Ellerman

powerpc/boot: Use the pre-boot decompression API

2016-09-28T04:31:43Z

Currently the powerpc boot wrapper has its own wrapper around zlib to handle decompressing gzipped kernels. The kernel decompressor library functions now provide a generic interface that can be used in the pre-boot environment. This allows boot wrappers to easily support different compression algorithms. This patch converts the wrapper to use this new API, but does not add support for using new algorithms. Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman

powerpc/boot: Parse chosen/cmdline-timeout parameter

2014-11-09T22:59:30Z

On some platforms a 5 second timeout during boot might be quite long, so make it configurable. Run the loop at least once to let the user stop the boot by holding a key pressed. If the timeout is set to 0, don't wait for input, which can be used as a workaround if the boot hangs on random data coming in on the serial port. Signed-off-by: Simon Kagstrom [mpe: Changelog wording & whitespace] Signed-off-by: Michael Ellerman

powerpc: Rename duplicate COMMAND_LINE_SIZE define

2014-04-28T06:31:54Z

We have two definitions of COMMAND_LINE_SIZE, one for the kernel and one for the boot wrapper. I assume this is so the boot wrapper can be self sufficient and not rely on kernel headers. Having two defines with the same name is confusing, I just updated the wrong one when trying to bump it. Make the boot wrapper define unique by calling it BOOT_COMMAND_LINE_SIZE. Signed-off-by: Anton Blanchard Signed-off-by: Benjamin Herrenschmidt

powerpc: Fix format string warning in arch/powerpc/boot/main.c

2008-10-31T09:14:19Z

Fix format string warning in arch/powerpc/boot/main.c. Also correct a typo ("uncomressed") on the same line. BOOTCC arch/powerpc/boot/main.o arch/powerpc/boot/main.c: In function 'prep_kernel': arch/powerpc/boot/main.c:65: warning: format '%08x' expects type 'unsigned int', but argument 3 has type 'long unsigned int' Signed-off-by: Jon Smirl Acked-by: David Gibson Signed-off-by: Paul Mackerras