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b24413180f
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
203 lines
3.8 KiB
ArmAsm
203 lines
3.8 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Based on swsusp_32.S, modified for FSL BookE by
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* Anton Vorontsov <avorontsov@ru.mvista.com>
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* Copyright (c) 2009-2010 MontaVista Software, LLC.
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*/
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#include <linux/threads.h>
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#include <asm/processor.h>
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#include <asm/page.h>
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#include <asm/cputable.h>
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#include <asm/thread_info.h>
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#include <asm/ppc_asm.h>
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#include <asm/asm-offsets.h>
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#include <asm/mmu.h>
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/*
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* Structure for storing CPU registers on the save area.
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*/
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#define SL_SP 0
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#define SL_PC 4
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#define SL_MSR 8
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#define SL_TCR 0xc
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#define SL_SPRG0 0x10
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#define SL_SPRG1 0x14
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#define SL_SPRG2 0x18
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#define SL_SPRG3 0x1c
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#define SL_SPRG4 0x20
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#define SL_SPRG5 0x24
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#define SL_SPRG6 0x28
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#define SL_SPRG7 0x2c
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#define SL_TBU 0x30
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#define SL_TBL 0x34
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#define SL_R2 0x38
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#define SL_CR 0x3c
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#define SL_LR 0x40
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#define SL_R12 0x44 /* r12 to r31 */
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#define SL_SIZE (SL_R12 + 80)
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.section .data
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.align 5
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_GLOBAL(swsusp_save_area)
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.space SL_SIZE
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.section .text
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.align 5
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_GLOBAL(swsusp_arch_suspend)
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lis r11,swsusp_save_area@h
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ori r11,r11,swsusp_save_area@l
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mflr r0
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stw r0,SL_LR(r11)
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mfcr r0
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stw r0,SL_CR(r11)
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stw r1,SL_SP(r11)
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stw r2,SL_R2(r11)
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stmw r12,SL_R12(r11)
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/* Save MSR & TCR */
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mfmsr r4
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stw r4,SL_MSR(r11)
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mfspr r4,SPRN_TCR
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stw r4,SL_TCR(r11)
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/* Get a stable timebase and save it */
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1: mfspr r4,SPRN_TBRU
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stw r4,SL_TBU(r11)
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mfspr r5,SPRN_TBRL
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stw r5,SL_TBL(r11)
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mfspr r3,SPRN_TBRU
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cmpw r3,r4
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bne 1b
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/* Save SPRGs */
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mfspr r4,SPRN_SPRG0
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stw r4,SL_SPRG0(r11)
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mfspr r4,SPRN_SPRG1
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stw r4,SL_SPRG1(r11)
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mfspr r4,SPRN_SPRG2
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stw r4,SL_SPRG2(r11)
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mfspr r4,SPRN_SPRG3
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stw r4,SL_SPRG3(r11)
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mfspr r4,SPRN_SPRG4
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stw r4,SL_SPRG4(r11)
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mfspr r4,SPRN_SPRG5
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stw r4,SL_SPRG5(r11)
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mfspr r4,SPRN_SPRG6
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stw r4,SL_SPRG6(r11)
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mfspr r4,SPRN_SPRG7
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stw r4,SL_SPRG7(r11)
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/* Call the low level suspend stuff (we should probably have made
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* a stackframe...
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*/
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bl swsusp_save
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/* Restore LR from the save area */
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lis r11,swsusp_save_area@h
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ori r11,r11,swsusp_save_area@l
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lwz r0,SL_LR(r11)
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mtlr r0
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blr
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_GLOBAL(swsusp_arch_resume)
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sync
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/* Load ptr the list of pages to copy in r3 */
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lis r11,(restore_pblist)@h
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ori r11,r11,restore_pblist@l
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lwz r3,0(r11)
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/* Copy the pages. This is a very basic implementation, to
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* be replaced by something more cache efficient */
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1:
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li r0,256
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mtctr r0
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lwz r5,pbe_address(r3) /* source */
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lwz r6,pbe_orig_address(r3) /* destination */
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2:
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lwz r8,0(r5)
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lwz r9,4(r5)
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lwz r10,8(r5)
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lwz r11,12(r5)
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addi r5,r5,16
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stw r8,0(r6)
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stw r9,4(r6)
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stw r10,8(r6)
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stw r11,12(r6)
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addi r6,r6,16
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bdnz 2b
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lwz r3,pbe_next(r3)
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cmpwi 0,r3,0
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bne 1b
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bl flush_dcache_L1
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bl flush_instruction_cache
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lis r11,swsusp_save_area@h
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ori r11,r11,swsusp_save_area@l
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/*
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* Mappings from virtual addresses to physical addresses may be
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* different than they were prior to restoring hibernation state.
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* Invalidate the TLB so that the boot CPU is using the new
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* mappings.
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*/
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bl _tlbil_all
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lwz r4,SL_SPRG0(r11)
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mtspr SPRN_SPRG0,r4
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lwz r4,SL_SPRG1(r11)
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mtspr SPRN_SPRG1,r4
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lwz r4,SL_SPRG2(r11)
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mtspr SPRN_SPRG2,r4
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lwz r4,SL_SPRG3(r11)
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mtspr SPRN_SPRG3,r4
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lwz r4,SL_SPRG4(r11)
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mtspr SPRN_SPRG4,r4
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lwz r4,SL_SPRG5(r11)
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mtspr SPRN_SPRG5,r4
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lwz r4,SL_SPRG6(r11)
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mtspr SPRN_SPRG6,r4
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lwz r4,SL_SPRG7(r11)
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mtspr SPRN_SPRG7,r4
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/* restore the MSR */
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lwz r3,SL_MSR(r11)
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mtmsr r3
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/* Restore TB */
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li r3,0
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mtspr SPRN_TBWL,r3
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lwz r3,SL_TBU(r11)
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lwz r4,SL_TBL(r11)
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mtspr SPRN_TBWU,r3
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mtspr SPRN_TBWL,r4
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/* Restore TCR and clear any pending bits in TSR. */
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lwz r4,SL_TCR(r11)
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mtspr SPRN_TCR,r4
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lis r4, (TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS)@h
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mtspr SPRN_TSR,r4
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/* Kick decrementer */
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li r0,1
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mtdec r0
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/* Restore the callee-saved registers and return */
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lwz r0,SL_CR(r11)
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mtcr r0
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lwz r2,SL_R2(r11)
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lmw r12,SL_R12(r11)
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lwz r1,SL_SP(r11)
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lwz r0,SL_LR(r11)
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mtlr r0
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li r3,0
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blr
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