kernel.git/arch/arm/nwfpe/entry.S, branch linux-rolling-stable

ARM: entry: Make asm coproc dispatch code NWFPE only

2023-05-17T13:08:22Z

Now that we can dispatch all VFP and iWMMXT related undef exceptions using undef hooks implemented in C code, we no longer need the asm entry code that takes care of this unless we are using FPE, so we can move it into the FPE entry code. As this means it is ARM only, we can remove the Thumb2 specific decorations as well. It also means the non-standard, asm-only calling convention where returning via LR means failure and returning via R9 means success is now only used on legacy platforms that lack any kind of function return prediction, avoiding the associated performance impact. Reviewed-by: Linus Walleij Signed-off-by: Ard Biesheuvel

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61

2019-05-24T15:36:45Z

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 this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 441 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Michael Ellerman (powerpc) Reviewed-by: Richard Fontana Reviewed-by: Allison Randal Reviewed-by: Kate Stewart Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de Signed-off-by: Greg Kroah-Hartman

ARM: swpan: fix nwfpe for uaccess changes

2015-09-09T22:26:11Z

NWFPE needs to access userspace to check whether the next instruction is another FP instruction. Allow userspace access for this read. Signed-off-by: Russell King

ARM: 8322/1: keep .text and .fixup regions closer together

2015-03-29T22:11:56Z

This moves all fixup snippets to the .text.fixup section, which is a special section that gets emitted along with the .text section for each input object file, i.e., the snippets are kept much closer to the code they refer to, which helps prevent linker failure on large kernels. Acked-by: Nicolas Pitre Signed-off-by: Ard Biesheuvel Signed-off-by: Russell King

ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+

2014-07-18T11:29:04Z

ARMv6 and greater introduced a new instruction ("bx") which can be used to return from function calls. Recent CPUs perform better when the "bx lr" instruction is used rather than the "mov pc, lr" instruction, and this sequence is strongly recommended to be used by the ARM architecture manual (section A.4.1.1). We provide a new macro "ret" with all its variants for the condition code which will resolve to the appropriate instruction. Rather than doing this piecemeal, and miss some instances, change all the "mov pc" instances to use the new macro, with the exception of the "movs" instruction and the kprobes code. This allows us to detect the "mov pc, lr" case and fix it up - and also gives us the possibility of deploying this for other registers depending on the CPU selection. Reported-by: Will Deacon Tested-by: Stephen Warren # Tegra Jetson TK1 Tested-by: Robert Jarzmik # mioa701_bootresume.S Tested-by: Andrew Lunn # Kirkwood Tested-by: Shawn Guo Tested-by: Tony Lindgren # OMAPs Tested-by: Gregory CLEMENT # Armada XP, 375, 385 Acked-by: Sekhar Nori # DaVinci Acked-by: Christoffer Dall # kvm/hyp Acked-by: Haojian Zhuang # PXA3xx Acked-by: Stefano Stabellini # Xen Tested-by: Uwe Kleine-König # ARMv7M Tested-by: Simon Horman # Shmobile Signed-off-by: Russell King

ARM: 7207/1: Use generic ARM instruction set condition code checks for nwfpe.

2011-12-13T08:52:02Z

This patch changes the nwfpe implementation to use the new generic ARM instruction set condition code checks, rather than a local implementation. It also removes the existing condition code checking, which has been used for the generic support (in kernel/opcodes.{ch}). This code has not been tested beyond building, linking and booting. Signed-off-by: Leif Lindholm Reviewed-by: Will Deacon Signed-off-by: Russell King

ARM: fix build error in arch/arm/kernel/process.c

2010-04-21T07:45:21Z

/tmp/ccJ3ssZW.s: Assembler messages: /tmp/ccJ3ssZW.s:1952: Error: can't resolve `.text' {.text section} - `.LFB1077' This is caused because: .section .data .section .text .section .text .previous does not return us to the .text section, but the .data section; this makes use of .previous dangerous if the ordering of previous sections is not known. Fix up the other users of .previous; .pushsection and .popsection are a safer pairing to use than .section and .previous. Signed-off-by: Russell King

[ARM] 4581/1: Fix the conditional execution of the NWFPE instructions

2007-10-12T22:43:22Z

Starting with ARMv7-A, conditional execution of undefined instructions can trigger an exception even if the condition check fails. This patch modifies the NWFPE support to check the condition before emulating the instruction. Signed-off-by: Catalin Marinas Signed-off-by: Russell King

Linux-2.6.12-rc2

2005-04-16T22:20:36Z

Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!