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>
229 lines
6.4 KiB
C
229 lines
6.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_KEXEC_H
|
|
#define _ASM_X86_KEXEC_H
|
|
|
|
#ifdef CONFIG_X86_32
|
|
# define PA_CONTROL_PAGE 0
|
|
# define VA_CONTROL_PAGE 1
|
|
# define PA_PGD 2
|
|
# define PA_SWAP_PAGE 3
|
|
# define PAGES_NR 4
|
|
#else
|
|
# define PA_CONTROL_PAGE 0
|
|
# define VA_CONTROL_PAGE 1
|
|
# define PA_TABLE_PAGE 2
|
|
# define PA_SWAP_PAGE 3
|
|
# define PAGES_NR 4
|
|
#endif
|
|
|
|
# define KEXEC_CONTROL_CODE_MAX_SIZE 2048
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/string.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/bootparam.h>
|
|
|
|
struct kimage;
|
|
|
|
/*
|
|
* KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
|
|
* I.e. Maximum page that is mapped directly into kernel memory,
|
|
* and kmap is not required.
|
|
*
|
|
* So far x86_64 is limited to 40 physical address bits.
|
|
*/
|
|
#ifdef CONFIG_X86_32
|
|
/* Maximum physical address we can use pages from */
|
|
# define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
|
|
/* Maximum address we can reach in physical address mode */
|
|
# define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
|
|
/* Maximum address we can use for the control code buffer */
|
|
# define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
|
|
|
|
# define KEXEC_CONTROL_PAGE_SIZE 4096
|
|
|
|
/* The native architecture */
|
|
# define KEXEC_ARCH KEXEC_ARCH_386
|
|
|
|
/* We can also handle crash dumps from 64 bit kernel. */
|
|
# define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
|
|
#else
|
|
/* Maximum physical address we can use pages from */
|
|
# define KEXEC_SOURCE_MEMORY_LIMIT (MAXMEM-1)
|
|
/* Maximum address we can reach in physical address mode */
|
|
# define KEXEC_DESTINATION_MEMORY_LIMIT (MAXMEM-1)
|
|
/* Maximum address we can use for the control pages */
|
|
# define KEXEC_CONTROL_MEMORY_LIMIT (MAXMEM-1)
|
|
|
|
/* Allocate one page for the pdp and the second for the code */
|
|
# define KEXEC_CONTROL_PAGE_SIZE (4096UL + 4096UL)
|
|
|
|
/* The native architecture */
|
|
# define KEXEC_ARCH KEXEC_ARCH_X86_64
|
|
#endif
|
|
|
|
/* Memory to backup during crash kdump */
|
|
#define KEXEC_BACKUP_SRC_START (0UL)
|
|
#define KEXEC_BACKUP_SRC_END (640 * 1024UL) /* 640K */
|
|
|
|
/*
|
|
* CPU does not save ss and sp on stack if execution is already
|
|
* running in kernel mode at the time of NMI occurrence. This code
|
|
* fixes it.
|
|
*/
|
|
static inline void crash_fixup_ss_esp(struct pt_regs *newregs,
|
|
struct pt_regs *oldregs)
|
|
{
|
|
#ifdef CONFIG_X86_32
|
|
newregs->sp = (unsigned long)&(oldregs->sp);
|
|
asm volatile("xorl %%eax, %%eax\n\t"
|
|
"movw %%ss, %%ax\n\t"
|
|
:"=a"(newregs->ss));
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* This function is responsible for capturing register states if coming
|
|
* via panic otherwise just fix up the ss and sp if coming via kernel
|
|
* mode exception.
|
|
*/
|
|
static inline void crash_setup_regs(struct pt_regs *newregs,
|
|
struct pt_regs *oldregs)
|
|
{
|
|
if (oldregs) {
|
|
memcpy(newregs, oldregs, sizeof(*newregs));
|
|
crash_fixup_ss_esp(newregs, oldregs);
|
|
} else {
|
|
#ifdef CONFIG_X86_32
|
|
asm volatile("movl %%ebx,%0" : "=m"(newregs->bx));
|
|
asm volatile("movl %%ecx,%0" : "=m"(newregs->cx));
|
|
asm volatile("movl %%edx,%0" : "=m"(newregs->dx));
|
|
asm volatile("movl %%esi,%0" : "=m"(newregs->si));
|
|
asm volatile("movl %%edi,%0" : "=m"(newregs->di));
|
|
asm volatile("movl %%ebp,%0" : "=m"(newregs->bp));
|
|
asm volatile("movl %%eax,%0" : "=m"(newregs->ax));
|
|
asm volatile("movl %%esp,%0" : "=m"(newregs->sp));
|
|
asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss));
|
|
asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs));
|
|
asm volatile("movl %%ds, %%eax;" :"=a"(newregs->ds));
|
|
asm volatile("movl %%es, %%eax;" :"=a"(newregs->es));
|
|
asm volatile("pushfl; popl %0" :"=m"(newregs->flags));
|
|
#else
|
|
asm volatile("movq %%rbx,%0" : "=m"(newregs->bx));
|
|
asm volatile("movq %%rcx,%0" : "=m"(newregs->cx));
|
|
asm volatile("movq %%rdx,%0" : "=m"(newregs->dx));
|
|
asm volatile("movq %%rsi,%0" : "=m"(newregs->si));
|
|
asm volatile("movq %%rdi,%0" : "=m"(newregs->di));
|
|
asm volatile("movq %%rbp,%0" : "=m"(newregs->bp));
|
|
asm volatile("movq %%rax,%0" : "=m"(newregs->ax));
|
|
asm volatile("movq %%rsp,%0" : "=m"(newregs->sp));
|
|
asm volatile("movq %%r8,%0" : "=m"(newregs->r8));
|
|
asm volatile("movq %%r9,%0" : "=m"(newregs->r9));
|
|
asm volatile("movq %%r10,%0" : "=m"(newregs->r10));
|
|
asm volatile("movq %%r11,%0" : "=m"(newregs->r11));
|
|
asm volatile("movq %%r12,%0" : "=m"(newregs->r12));
|
|
asm volatile("movq %%r13,%0" : "=m"(newregs->r13));
|
|
asm volatile("movq %%r14,%0" : "=m"(newregs->r14));
|
|
asm volatile("movq %%r15,%0" : "=m"(newregs->r15));
|
|
asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss));
|
|
asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs));
|
|
asm volatile("pushfq; popq %0" :"=m"(newregs->flags));
|
|
#endif
|
|
newregs->ip = (unsigned long)current_text_addr();
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_X86_32
|
|
asmlinkage unsigned long
|
|
relocate_kernel(unsigned long indirection_page,
|
|
unsigned long control_page,
|
|
unsigned long start_address,
|
|
unsigned int has_pae,
|
|
unsigned int preserve_context);
|
|
#else
|
|
unsigned long
|
|
relocate_kernel(unsigned long indirection_page,
|
|
unsigned long page_list,
|
|
unsigned long start_address,
|
|
unsigned int preserve_context,
|
|
unsigned int sme_active);
|
|
#endif
|
|
|
|
#define ARCH_HAS_KIMAGE_ARCH
|
|
|
|
#ifdef CONFIG_X86_32
|
|
struct kimage_arch {
|
|
pgd_t *pgd;
|
|
#ifdef CONFIG_X86_PAE
|
|
pmd_t *pmd0;
|
|
pmd_t *pmd1;
|
|
#endif
|
|
pte_t *pte0;
|
|
pte_t *pte1;
|
|
};
|
|
#else
|
|
struct kimage_arch {
|
|
p4d_t *p4d;
|
|
pud_t *pud;
|
|
pmd_t *pmd;
|
|
pte_t *pte;
|
|
/* Details of backup region */
|
|
unsigned long backup_src_start;
|
|
unsigned long backup_src_sz;
|
|
|
|
/* Physical address of backup segment */
|
|
unsigned long backup_load_addr;
|
|
|
|
/* Core ELF header buffer */
|
|
void *elf_headers;
|
|
unsigned long elf_headers_sz;
|
|
unsigned long elf_load_addr;
|
|
};
|
|
#endif /* CONFIG_X86_32 */
|
|
|
|
#ifdef CONFIG_X86_64
|
|
/*
|
|
* Number of elements and order of elements in this structure should match
|
|
* with the ones in arch/x86/purgatory/entry64.S. If you make a change here
|
|
* make an appropriate change in purgatory too.
|
|
*/
|
|
struct kexec_entry64_regs {
|
|
uint64_t rax;
|
|
uint64_t rcx;
|
|
uint64_t rdx;
|
|
uint64_t rbx;
|
|
uint64_t rsp;
|
|
uint64_t rbp;
|
|
uint64_t rsi;
|
|
uint64_t rdi;
|
|
uint64_t r8;
|
|
uint64_t r9;
|
|
uint64_t r10;
|
|
uint64_t r11;
|
|
uint64_t r12;
|
|
uint64_t r13;
|
|
uint64_t r14;
|
|
uint64_t r15;
|
|
uint64_t rip;
|
|
};
|
|
|
|
extern int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages,
|
|
gfp_t gfp);
|
|
#define arch_kexec_post_alloc_pages arch_kexec_post_alloc_pages
|
|
|
|
extern void arch_kexec_pre_free_pages(void *vaddr, unsigned int pages);
|
|
#define arch_kexec_pre_free_pages arch_kexec_pre_free_pages
|
|
|
|
#endif
|
|
|
|
typedef void crash_vmclear_fn(void);
|
|
extern crash_vmclear_fn __rcu *crash_vmclear_loaded_vmcss;
|
|
extern void kdump_nmi_shootdown_cpus(void);
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_X86_KEXEC_H */
|