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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>
246 lines
6.6 KiB
C
246 lines
6.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_EFI_H
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#define _ASM_X86_EFI_H
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#include <asm/fpu/api.h>
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#include <asm/pgtable.h>
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#include <asm/processor-flags.h>
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#include <asm/tlb.h>
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/*
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* We map the EFI regions needed for runtime services non-contiguously,
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* with preserved alignment on virtual addresses starting from -4G down
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* for a total max space of 64G. This way, we provide for stable runtime
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* services addresses across kernels so that a kexec'd kernel can still
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* use them.
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*
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* This is the main reason why we're doing stable VA mappings for RT
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* services.
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*
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* This flag is used in conjuction with a chicken bit called
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* "efi=old_map" which can be used as a fallback to the old runtime
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* services mapping method in case there's some b0rkage with a
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* particular EFI implementation (haha, it is hard to hold up the
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* sarcasm here...).
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*/
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#define EFI_OLD_MEMMAP EFI_ARCH_1
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#define EFI32_LOADER_SIGNATURE "EL32"
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#define EFI64_LOADER_SIGNATURE "EL64"
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#define MAX_CMDLINE_ADDRESS UINT_MAX
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#define ARCH_EFI_IRQ_FLAGS_MASK X86_EFLAGS_IF
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#ifdef CONFIG_X86_32
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extern asmlinkage unsigned long efi_call_phys(void *, ...);
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#define arch_efi_call_virt_setup() kernel_fpu_begin()
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#define arch_efi_call_virt_teardown() kernel_fpu_end()
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/*
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* Wrap all the virtual calls in a way that forces the parameters on the stack.
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*/
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#define arch_efi_call_virt(p, f, args...) \
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({ \
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((efi_##f##_t __attribute__((regparm(0)))*) p->f)(args); \
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})
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#define efi_ioremap(addr, size, type, attr) ioremap_cache(addr, size)
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#else /* !CONFIG_X86_32 */
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#define EFI_LOADER_SIGNATURE "EL64"
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extern asmlinkage u64 efi_call(void *fp, ...);
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#define efi_call_phys(f, args...) efi_call((f), args)
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/*
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* Scratch space used for switching the pagetable in the EFI stub
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*/
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struct efi_scratch {
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u64 r15;
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u64 prev_cr3;
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pgd_t *efi_pgt;
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bool use_pgd;
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u64 phys_stack;
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} __packed;
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#define arch_efi_call_virt_setup() \
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({ \
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efi_sync_low_kernel_mappings(); \
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preempt_disable(); \
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__kernel_fpu_begin(); \
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\
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if (efi_scratch.use_pgd) { \
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efi_scratch.prev_cr3 = __read_cr3(); \
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write_cr3((unsigned long)efi_scratch.efi_pgt); \
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__flush_tlb_all(); \
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} \
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})
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#define arch_efi_call_virt(p, f, args...) \
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efi_call((void *)p->f, args) \
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#define arch_efi_call_virt_teardown() \
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({ \
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if (efi_scratch.use_pgd) { \
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write_cr3(efi_scratch.prev_cr3); \
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__flush_tlb_all(); \
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} \
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\
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__kernel_fpu_end(); \
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preempt_enable(); \
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})
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extern void __iomem *__init efi_ioremap(unsigned long addr, unsigned long size,
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u32 type, u64 attribute);
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#ifdef CONFIG_KASAN
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/*
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* CONFIG_KASAN may redefine memset to __memset. __memset function is present
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* only in kernel binary. Since the EFI stub linked into a separate binary it
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* doesn't have __memset(). So we should use standard memset from
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* arch/x86/boot/compressed/string.c. The same applies to memcpy and memmove.
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*/
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#undef memcpy
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#undef memset
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#undef memmove
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#endif
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#endif /* CONFIG_X86_32 */
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extern struct efi_scratch efi_scratch;
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extern void __init efi_set_executable(efi_memory_desc_t *md, bool executable);
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extern int __init efi_memblock_x86_reserve_range(void);
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extern pgd_t * __init efi_call_phys_prolog(void);
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extern void __init efi_call_phys_epilog(pgd_t *save_pgd);
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extern void __init efi_print_memmap(void);
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extern void __init efi_memory_uc(u64 addr, unsigned long size);
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extern void __init efi_map_region(efi_memory_desc_t *md);
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extern void __init efi_map_region_fixed(efi_memory_desc_t *md);
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extern void efi_sync_low_kernel_mappings(void);
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extern int __init efi_alloc_page_tables(void);
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extern int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages);
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extern void __init old_map_region(efi_memory_desc_t *md);
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extern void __init runtime_code_page_mkexec(void);
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extern void __init efi_runtime_update_mappings(void);
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extern void __init efi_dump_pagetable(void);
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extern void __init efi_apply_memmap_quirks(void);
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extern int __init efi_reuse_config(u64 tables, int nr_tables);
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extern void efi_delete_dummy_variable(void);
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struct efi_setup_data {
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u64 fw_vendor;
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u64 runtime;
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u64 tables;
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u64 smbios;
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u64 reserved[8];
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};
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extern u64 efi_setup;
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#ifdef CONFIG_EFI
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static inline bool efi_is_native(void)
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{
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return IS_ENABLED(CONFIG_X86_64) == efi_enabled(EFI_64BIT);
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}
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static inline bool efi_runtime_supported(void)
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{
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if (efi_is_native())
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return true;
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if (IS_ENABLED(CONFIG_EFI_MIXED) && !efi_enabled(EFI_OLD_MEMMAP))
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return true;
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return false;
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}
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extern struct console early_efi_console;
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extern void parse_efi_setup(u64 phys_addr, u32 data_len);
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extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
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#ifdef CONFIG_EFI_MIXED
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extern void efi_thunk_runtime_setup(void);
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extern efi_status_t efi_thunk_set_virtual_address_map(
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void *phys_set_virtual_address_map,
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unsigned long memory_map_size,
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unsigned long descriptor_size,
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u32 descriptor_version,
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efi_memory_desc_t *virtual_map);
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#else
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static inline void efi_thunk_runtime_setup(void) {}
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static inline efi_status_t efi_thunk_set_virtual_address_map(
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void *phys_set_virtual_address_map,
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unsigned long memory_map_size,
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unsigned long descriptor_size,
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u32 descriptor_version,
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efi_memory_desc_t *virtual_map)
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{
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return EFI_SUCCESS;
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}
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#endif /* CONFIG_EFI_MIXED */
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/* arch specific definitions used by the stub code */
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struct efi_config {
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u64 image_handle;
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u64 table;
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u64 runtime_services;
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u64 boot_services;
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u64 text_output;
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efi_status_t (*call)(unsigned long, ...);
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bool is64;
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} __packed;
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__pure const struct efi_config *__efi_early(void);
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static inline bool efi_is_64bit(void)
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{
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if (!IS_ENABLED(CONFIG_X86_64))
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return false;
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if (!IS_ENABLED(CONFIG_EFI_MIXED))
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return true;
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return __efi_early()->is64;
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}
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#define efi_table_attr(table, attr, instance) \
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(efi_is_64bit() ? \
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((table##_64_t *)(unsigned long)instance)->attr : \
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((table##_32_t *)(unsigned long)instance)->attr)
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#define efi_call_proto(protocol, f, instance, ...) \
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__efi_early()->call(efi_table_attr(protocol, f, instance), \
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instance, ##__VA_ARGS__)
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#define efi_call_early(f, ...) \
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__efi_early()->call(efi_table_attr(efi_boot_services, f, \
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__efi_early()->boot_services), __VA_ARGS__)
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#define __efi_call_early(f, ...) \
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__efi_early()->call((unsigned long)f, __VA_ARGS__);
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#define efi_call_runtime(f, ...) \
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__efi_early()->call(efi_table_attr(efi_runtime_services, f, \
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__efi_early()->runtime_services), __VA_ARGS__)
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extern bool efi_reboot_required(void);
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#else
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static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {}
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static inline bool efi_reboot_required(void)
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{
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return false;
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}
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#endif /* CONFIG_EFI */
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#endif /* _ASM_X86_EFI_H */
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