- 15 6月, 2019 1 次提交
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由 Christophe Leroy 提交于
Otherwise, the following warning is encountered: WARNING: vmlinux.o(.text+0x3dc6): Section mismatch in reference from the variable start_here_multiplatform to the function .init.text:.early_setup() The function start_here_multiplatform() references the function __init .early_setup(). This is often because start_here_multiplatform lacks a __init annotation or the annotation of .early_setup is wrong. Fixes: 56c46bba ("powerpc/64: Fix booting large kernels with STRICT_KERNEL_RWX") Cc: Russell Currey <ruscur@russell.cc> Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 31 5月, 2019 1 次提交
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由 Thomas Gleixner 提交于
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: NThomas Gleixner <tglx@linutronix.de> Reviewed-by: NAllison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.deSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 20 4月, 2019 1 次提交
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由 Russell Currey 提交于
With STRICT_KERNEL_RWX enabled anything marked __init is placed at a 16M boundary. This is necessary so that it can be repurposed later with different permissions. However, in kernels with text larger than 16M, this pushes early_setup past 32M, incapable of being reached by the branch instruction. Fix this by setting the CTR and branching there instead. Fixes: 1e0fc9d1 ("powerpc/Kconfig: Enable STRICT_KERNEL_RWX for some configs") Signed-off-by: NRussell Currey <ruscur@russell.cc> [mpe: Fix it to work on BE by using DOTSYM()] Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 23 2月, 2019 1 次提交
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由 Michael Ellerman 提交于
In __secondary_start() we load the thread_info of the idle task of the secondary CPU from current_set[cpu], and then convert it into a stack pointer before storing that back to paca->kstack. As pointed out in commit f761622e ("powerpc: Initialise paca->kstack before early_setup_secondary") it's important that we initialise paca->kstack before calling the MMU setup code, in particular slb_initialize(), because it will bolt the SLB entry for the kstack into the SLB. However we have already setup paca->kstack in cpu_idle_thread_init(), since commit 3b575064 ("[POWERPC] Bolt in SLB entry for kernel stack on secondary cpus") (May 2008). It's also in cpu_idle_thread_init() that we initialise current_set[cpu] with the thread_info pointer, so there is no issue of the timing being different between the two. Therefore the initialisation of paca->kstack in __setup_secondary() is completely redundant, so remove it. This has the added benefit of removing code that runs in real mode, and is therefore restricted by the RMO, and so opens the way for us to enable THREAD_INFO_IN_TASK. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 30 7月, 2018 1 次提交
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由 Christophe Leroy 提交于
files not using feature fixup don't need asm/feature-fixups.h files using feature fixup need asm/feature-fixups.h Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 30 3月, 2018 1 次提交
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由 Nicholas Piggin 提交于
Change the paca array into an array of pointers to pacas. Allocate pacas individually. This allows flexibility in where the PACAs are allocated. Future work will allocate them node-local. Platforms that don't have address limits on PACAs would be able to defer PACA allocations until later in boot rather than allocate all possible ones up-front then freeing unused. This is slightly more overhead (one additional indirection) for cross CPU paca references, but those aren't too common. Signed-off-by: NNicholas Piggin <npiggin@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 19 1月, 2018 2 次提交
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由 Madhavan Srinivasan 提交于
Rename the paca->soft_enabled to paca->irq_soft_mask as it is no longer used as a flag for interrupt state, but a mask. Signed-off-by: NMadhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Madhavan Srinivasan 提交于
Two #defines IRQS_ENABLED and IRQS_DISABLED are added to be used when updating paca->soft_enabled. Replace the hardcoded values used when updating paca->soft_enabled with IRQ_(EN|DIS)ABLED #define. No logic change. Reviewed-by: NNicholas Piggin <npiggin@gmail.com> Signed-off-by: NMadhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 10 11月, 2017 1 次提交
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由 Nicholas Piggin 提交于
OPAL boot does not insert secondaries at 0x60 to wait at the secondary hold spinloop. Instead they are started later, and inserted at generic_secondary_smp_init(), which is after the secondary hold spinloop. Avoid waiting on this spinloop when booting with OPAL firmware. This wait always times out that case. This saves 100ms boot time on powernv, and 10s of seconds of real time when booting on the simulator in SMP. Signed-off-by: NNicholas Piggin <npiggin@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 31 8月, 2017 1 次提交
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由 Tobin C. Harding 提交于
.llong is an undocumented PPC specific directive. The generic equivalent is .quad, but even better (because it's self describing) is .8byte. Convert all .llong directives to .8byte. Signed-off-by: NTobin C. Harding <me@tobin.cc> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 20 3月, 2017 1 次提交
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由 Hamish Martin 提交于
Fix an assembler error when the THREAD_SIZE is greater than 16k. Signed-off-by: NHamish Martin <hamish.martin@alliedtelesis.co.nz> Reviewed-by: NChris Packham <chris.packham@alliedtelesis.co.nz> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 30 11月, 2016 1 次提交
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由 Thiago Jung Bauermann 提交于
Commit 2965faa5 ("kexec: split kexec_load syscall from kexec core code") introduced CONFIG_KEXEC_CORE so that CONFIG_KEXEC means whether the kexec_load system call should be compiled-in and CONFIG_KEXEC_FILE means whether the kexec_file_load system call should be compiled-in. These options can be set independently from each other. Since until now powerpc only supported kexec_load, CONFIG_KEXEC and CONFIG_KEXEC_CORE were synonyms. That is not the case anymore, so we need to make a distinction. Almost all places where CONFIG_KEXEC was being used should be using CONFIG_KEXEC_CORE instead, since kexec_file_load also needs that code compiled in. Signed-off-by: NThiago Jung Bauermann <bauerman@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 28 11月, 2016 1 次提交
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由 Nicholas Piggin 提交于
From 80f23935 ("powerpc: Convert cmp to cmpd in idle enter sequence"): PowerPC's "cmp" instruction has four operands. Normally people write "cmpw" or "cmpd" for the second cmp operand 0 or 1. But, frequently people forget, and write "cmp" with just three operands. With older binutils this is silently accepted as if this was "cmpw", while often "cmpd" is wanted. With newer binutils GAS will complain about this for 64-bit code. For 32-bit code it still silently assumes "cmpw" is what is meant. In this case, cmpwi is called for, so this is just a build fix for new toolchains. Cc: stable@vger.kernel.org # v3.0+ Signed-off-by: NNicholas Piggin <npiggin@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 14 11月, 2016 1 次提交
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由 Nicholas Piggin 提交于
This adds a config option that can help exercise the case when the kernel is not running at PAGE_OFFSET. Signed-off-by: NNicholas Piggin <npiggin@gmail.com> Reviewed-by: NBalbir Singh <bsingharora@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 04 10月, 2016 2 次提交
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由 Nicholas Piggin 提交于
Use assembler sections of fixed size and location to arrange the 64-bit Book3S exception vector code (64-bit Book3E also uses it in head_64.S for 0x0..0x100). This allows better flexibility in arranging exception code and hiding unimportant details behind macros. Gas sections can be a bit painful to use this way, mainly because the assembler does not know where they will be finally linked. Taking absolute addresses requires a bit of trickery for example, but it can be hidden behind macros for the most part. Generated code is mostly the same except locations, offsets, alignments. The "+ 0x2" is only required for the trap number / kvm exit number, which gets loaded as a constant into a register. Previously, code also used + 0x2 for label names, but we changed to using "H" to distinguish HV case for that. Remove the last vestiges of that. __after_prom_start is taking absolute address of a label in another fixed section. Newer toolchains seemed to compile this okay, but older ones do not. FIXED_SYMBOL_ABS_ADDR is more foolproof, it just takes an additional line to define. Signed-off-by: NNicholas Piggin <npiggin@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Nicholas Piggin 提交于
With a subsequent patch to put text into different sections, (_end - _stext) can no longer be computed at link time to determine the end of the copy. Instead, calculate it at runtime with (copy_to_here - _stext) + (_end - copy_to_here). Signed-off-by: NNicholas Piggin <npiggin@gmail.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 08 8月, 2016 1 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 21 7月, 2016 1 次提交
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由 Benjamin Herrenschmidt 提交于
And kill setup_system(). Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 14 6月, 2016 1 次提交
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由 Michael Ellerman 提交于
We're approaching 20 locations where we need to check for ELF ABI v2. That's fine, except the logic is a bit awkward, because we have to check that _CALL_ELF is defined and then what its value is. So check it once in asm/types.h and define PPC64_ELF_ABI_v2 when ELF ABI v2 is detected. We also have a few places where what we're really trying to check is that we are using the 64-bit v1 ABI, ie. function descriptors. So also add a #define for that, which simplifies several checks. Signed-off-by: NNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 11 5月, 2016 1 次提交
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由 Aneesh Kumar K.V 提交于
With 4K page size radix config our level 1 page table size is 64K and it should be naturally aligned. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 16 3月, 2016 1 次提交
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由 Scott Wood 提交于
This preserves the ability to build using older binutils (reportedly <= 2.22). Fixes: 6becef7e ("powerpc/mpc85xx: Add CPU hotplug support for E6500") Signed-off-by: NScott Wood <oss@buserror.net> Cc: chenhui.zhao@freescale.com Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 05 3月, 2016 2 次提交
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由 chenhui zhao 提交于
Support Freescale E6500 core-based platforms, like t4240. Support disabling/enabling individual CPU thread dynamically. Signed-off-by: NChenhui Zhao <chenhui.zhao@freescale.com>
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由 chenhui zhao 提交于
There is a RCPM (Run Control/Power Management) in Freescale QorIQ series processors. The device performs tasks associated with device run control and power management. The driver implements some features: mask/unmask irq, enter/exit low power states, freeze time base, etc. Signed-off-by: NChenhui Zhao <chenhui.zhao@freescale.com> Signed-off-by: NTang Yuantian <Yuantian.Tang@freescale.com> [scottwood: remove __KERNEL__ ifdef] Signed-off-by: NScott Wood <oss@buserror.net>
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- 28 10月, 2015 3 次提交
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由 Tiejun Chen 提交于
book3e is different with book3s since 3s includes the exception vectors code in head_64.S as it relies on absolute addressing which is only possible within this compilation unit. So we have to get that label address with got. And when boot a relocated kernel, we should reset ipvr properly again after .relocate. Signed-off-by: NTiejun Chen <tiejun.chen@windriver.com> [scottwood: cleanup and ifdef removal] Signed-off-by: NScott Wood <scottwood@freescale.com>
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由 Tiejun Chen 提交于
Convert r4/r5, not r6, to a virtual address when calling copy_and_flush. Otherwise, r3 is already virtual, and copy_to_flush tries to access r3+r6, PAGE_OFFSET gets added twice. This isn't normally seen because on book3e we normally enter with the kernel at zero and thus skip copy_to_flush -- but it will be needed for kexec support. Signed-off-by: NTiejun Chen <tiejun.chen@windriver.com> [scottwood: split patch and rewrote changelog] Signed-off-by: NScott Wood <scottwood@freescale.com>
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由 Scott Wood 提交于
The new kernel will be expecting secondary threads to be disabled, not spinning. Signed-off-by: NScott Wood <scottwood@freescale.com>
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- 30 7月, 2014 1 次提交
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由 Andy Fleming 提交于
The general idea is that each core will release all of its threads into the secondary thread startup code, which will eventually wait in the secondary core holding area, for the appropriate bit in the PACA to be set. The kick_cpu function pointer will set that bit in the PACA, and thus "release" the core/thread to boot. We also need to do a few things that U-Boot normally does for CPUs (like enable branch prediction). Signed-off-by: NAndy Fleming <afleming@freescale.com> [scottwood@freescale.com: various changes, including only enabling threads if Linux wants to kick them] Signed-off-by: NScott Wood <scottwood@freescale.com>
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- 28 7月, 2014 1 次提交
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由 Michael Ellerman 提交于
Old cpus didn't have a Segment Lookaside Buffer (SLB), instead they had a Segment Table (STAB). Now that we've dropped support for those cpus, we can remove the STAB support entirely. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 23 4月, 2014 5 次提交
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由 Anton Blanchard 提交于
There is no need to put a function descriptor in __secondary_hold_spinloop. Use ppc_function_entry to get the instruction address and put it in __secondary_hold_spinloop instead. Also fix an issue where we assumed cur_cpu_spec held a function descriptor. Signed-off-by: NAnton Blanchard <anton@samba.org>
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由 Anton Blanchard 提交于
To establish addressability quickly, ABIv2 requires the target address of the function being called to be in r12. Fix a number of places in assembly code that we do indirect function calls. We need to avoid function descriptors on ABIv2 too. Signed-off-by: NAnton Blanchard <anton@samba.org>
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由 Anton Blanchard 提交于
There is no need to create a function descriptor for functions called locally out of assembly. Signed-off-by: NAnton Blanchard <anton@samba.org>
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由 Anton Blanchard 提交于
We have a number of places where we load the text address of a local function and indirectly branch to it in assembly. Since it is an indirect branch binutils will not know to use the function text address, so that trick wont work. There is no need for these functions to have a function descriptor so we can replace it with a label and remove the dot symbol. Signed-off-by: NAnton Blanchard <anton@samba.org>
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由 Anton Blanchard 提交于
binutils is smart enough to know that a branch to a function descriptor is actually a branch to the functions text address. Alan tells me that binutils has been doing this for 9 years. Signed-off-by: NAnton Blanchard <anton@samba.org>
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- 15 1月, 2014 1 次提交
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由 Paul Gortmaker 提交于
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. The one instance where we add an include for init.h covers off a case where that file was implicitly getting it from another header which itself didn't need it. Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 30 12月, 2013 2 次提交
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由 Olof Johansson 提交于
Commit 5c0484e2 ('powerpc: Endian safe trampoline') resulted in losing proper alignment of the spinlock variables used when booting secondary CPUs, causing some quite odd issues with failing to boot on PA Semi-based systems. This showed itself on ppc64_defconfig, but not on pasemi_defconfig, so it had gone unnoticed when I initially tested the LE patch set. Fix is to add explicit alignment instead of relying on good luck. :) [ It appears that there is a different issue with PA Semi systems however this fix is definitely correct so applying anyway -- BenH ] Fixes: 5c0484e2 ('powerpc: Endian safe trampoline') Reported-by: NChristian Zigotzky <chzigotzky@xenosoft.de> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=67811Signed-off-by: NOlof Johansson <olof@lixom.net> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Anton Blanchard 提交于
p_end is an 8 byte value embedded in the text section. This means it is only 4 byte aligned when it should be 8 byte aligned. Fix this by adding an explicit alignment. This fixes an issue where POWER7 little endian builds with CONFIG_RELOCATABLE=y fail to boot. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 11 10月, 2013 1 次提交
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由 Benjamin Herrenschmidt 提交于
Create a trampoline that works in either endian and flips to the expected endian. Use it for primary and secondary thread entry as well as RTAS and OF call return. Credit for finding the magic instruction goes to Paul Mackerras Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 14 8月, 2013 1 次提交
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由 Anton Blanchard 提交于
p_toc is an 8 byte relative offset to the TOC that we place in the text section. This means it is only 4 byte aligned where it should be 8 byte aligned. Add an explicit alignment. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 26 4月, 2013 1 次提交
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由 Michael Neuling 提交于
In __after_prom_start we copy the kernel down to zero in two calls to copy_and_flush. After the first call (copy from 0 to copy_to_here:) we jump to the newly copied code soon after. Unfortunately there's no isync between the copy of this code and the jump to it. Hence it's possible that stale instructions could still be in the icache or pipeline before we branch to it. We've seen this on real machines and it's results in no console output after: calling quiesce... returning from prom_init The below adds an isync to ensure that the copy and flushing has completed before any branching to the new instructions occurs. Signed-off-by: NMichael Neuling <mikey@neuling.org> CC: <stable@vger.kernel.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 10 1月, 2013 1 次提交
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由 Jimi Xenidis 提交于
Motivation: IBM Blue Gene/Q comes with some very strange firmware that I'm trying to get out of using in the kernel. So instead I spin all the threads in the boot wrapper (using the firmware) and have them enter the kexec stub, pre-translated at the virtual "linear" address, never touching firmware again. This works strategy works wonderfully, but I need the following patch in the kexec stub. I believe it should not effect Book3S and Book3E does not appear to be here yet so I'd love to get any criticisms up front. This patch adds two items: 1) Book3e requires that GPR4 survive the "hold" process, so we make sure that happens. 2) Book3e has no real mode, and the hold code exploits this. Since these processors ares always translated, we arrange for the kexeced threads to enter the hold code using the normal kernel linear mapping. Signed-off-by: NJimi Xenidis <jimix@pobox.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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