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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Linus Torvalds](/assets/img/avatar_default.png)
Highlights include: - Support for the kexec_file_load() syscall, which is a prereq for secure and trusted boot. - Prevent kernel execution of userspace on P9 Radix (similar to SMEP/PXN). - Sort the exception tables at build time, to save time at boot, and store them as relative offsets to save space in the kernel image & memory. - Allow building the kernel with thin archives, which should allow us to build an allyesconfig once some other fixes land. - Build fixes to allow us to correctly rebuild when changing the kernel endian from big to little or vice versa. - Plumbing so that we can avoid doing a full mm TLB flush on P9 Radix. - Initial stack protector support (-fstack-protector). - Support for dumping the radix (aka. Linux) and hash page tables via debugfs. - Fix an oops in cxl coredump generation when cxl_get_fd() is used. - Freescale updates from Scott: "Highlights include 8xx hugepage support, qbman fixes/cleanup, device tree updates, and some misc cleanup." - Many and varied fixes and minor enhancements as always. Thanks to: Alexey Kardashevskiy, Andrew Donnellan, Aneesh Kumar K.V, Anshuman Khandual, Anton Blanchard, Balbir Singh, Bartlomiej Zolnierkiewicz, Christophe Jaillet, Christophe Leroy, Denis Kirjanov, Elimar Riesebieter, Frederic Barrat, Gautham R. Shenoy, Geliang Tang, Geoff Levand, Jack Miller, Johan Hovold, Lars-Peter Clausen, Libin, Madhavan Srinivasan, Michael Neuling, Nathan Fontenot, Naveen N. Rao, Nicholas Piggin, Pan Xinhui, Peter Senna Tschudin, Rashmica Gupta, Rui Teng, Russell Currey, Scott Wood, Simon Guo, Suraj Jitindar Singh, Thiago Jung Bauermann, Tobias Klauser, Vaibhav Jain. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJYU4YSAAoJEFHr6jzI4aWAC4gQALtIAqqPon0Cd5b/FVVcMbW7 mMqB2b/0FGEl5GoRTzGUDaQqElilm6AEVfHO86C7DFji/a6olneFfw87iz+mtWuZ JvrNq68ZiSnoeszdUy4MgtXFLb5sTzNMev4skaHfjI9E5CepWBoR0zH4G+kNVnd5 WSgudv8Cq4Px+MEuTOigt3QYjHzZ3cw/XNOOm9c+oGj+PDW4O9UItVI+S1WLoey4 rAB2nRcLMDPuwfRQC9XsF3zEbkv4h1dEXo/EBRuRpcF+0lLTzFw1lv1WE8OxlUmS kAXbty3dIytBfSbtJT0c0Ps6sfQ4HFhu6ZV2fjnxNTz2KDkBIN7LBYHmBYiqY9oZ 9zvbUWtfiTu5ocfRtTq7rC/Hcj4Kbr9S9F/FvXR0WyDsKgu4xxAovqC3gcn6YjYK Rr1tcCI4nUzyhVJVmd+OEhUvc5JbFy9aGage+YeOyejfvvSbXIunaxWlPjoDkvim Vjl+UKU8gw51XFssqY5ZBi/HNlMFKYedLpMFp/fItnLglhj50V0eFWkpDgdSCYom vo9ifPLZx8n8m8De3H7TV4E0F4gCHcTeqZdu7tW9AAUVM6iLJcDLm3asGmtNh21t snOHNOJ5QSIno6ezUUg29T6VBjbPh46fdJJSlIZrEe8OzLZ1haGyttf0tD00PQvY Z2W/m3gxafnOeGgBqvyv =xOzf -----END PGP SIGNATURE----- Merge tag 'powerpc-4.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: "Highlights include: - Support for the kexec_file_load() syscall, which is a prereq for secure and trusted boot. - Prevent kernel execution of userspace on P9 Radix (similar to SMEP/PXN). - Sort the exception tables at build time, to save time at boot, and store them as relative offsets to save space in the kernel image & memory. - Allow building the kernel with thin archives, which should allow us to build an allyesconfig once some other fixes land. - Build fixes to allow us to correctly rebuild when changing the kernel endian from big to little or vice versa. - Plumbing so that we can avoid doing a full mm TLB flush on P9 Radix. - Initial stack protector support (-fstack-protector). - Support for dumping the radix (aka. Linux) and hash page tables via debugfs. - Fix an oops in cxl coredump generation when cxl_get_fd() is used. - Freescale updates from Scott: "Highlights include 8xx hugepage support, qbman fixes/cleanup, device tree updates, and some misc cleanup." - Many and varied fixes and minor enhancements as always. Thanks to: Alexey Kardashevskiy, Andrew Donnellan, Aneesh Kumar K.V, Anshuman Khandual, Anton Blanchard, Balbir Singh, Bartlomiej Zolnierkiewicz, Christophe Jaillet, Christophe Leroy, Denis Kirjanov, Elimar Riesebieter, Frederic Barrat, Gautham R. Shenoy, Geliang Tang, Geoff Levand, Jack Miller, Johan Hovold, Lars-Peter Clausen, Libin, Madhavan Srinivasan, Michael Neuling, Nathan Fontenot, Naveen N. Rao, Nicholas Piggin, Pan Xinhui, Peter Senna Tschudin, Rashmica Gupta, Rui Teng, Russell Currey, Scott Wood, Simon Guo, Suraj Jitindar Singh, Thiago Jung Bauermann, Tobias Klauser, Vaibhav Jain" [ And thanks to Michael, who took time off from a new baby to get this pull request done. - Linus ] * tag 'powerpc-4.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (174 commits) powerpc/fsl/dts: add FMan node for t1042d4rdb powerpc/fsl/dts: add sg_2500_aqr105_phy4 alias on t1024rdb powerpc/fsl/dts: add QMan and BMan nodes on t1024 powerpc/fsl/dts: add QMan and BMan nodes on t1023 soc/fsl/qman: test: use DEFINE_SPINLOCK() powerpc/fsl-lbc: use DEFINE_SPINLOCK() powerpc/8xx: Implement support of hugepages powerpc: get hugetlbpage handling more generic powerpc: port 64 bits pgtable_cache to 32 bits powerpc/boot: Request no dynamic linker for boot wrapper soc/fsl/bman: Use resource_size instead of computation soc/fsl/qe: use builtin_platform_driver powerpc/fsl_pmc: use builtin_platform_driver powerpc/83xx/suspend: use builtin_platform_driver powerpc/ftrace: Fix the comments for ftrace_modify_code powerpc/perf: macros for power9 format encoding powerpc/perf: power9 raw event format encoding powerpc/perf: update attribute_group data structure powerpc/perf: factor out the event format field powerpc/mm/iommu, vfio/spapr: Put pages on VFIO container shutdown ...
398 lines
12 KiB
C
398 lines
12 KiB
C
#ifndef LINUX_KEXEC_H
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#define LINUX_KEXEC_H
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#define IND_DESTINATION_BIT 0
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#define IND_INDIRECTION_BIT 1
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#define IND_DONE_BIT 2
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#define IND_SOURCE_BIT 3
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#define IND_DESTINATION (1 << IND_DESTINATION_BIT)
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#define IND_INDIRECTION (1 << IND_INDIRECTION_BIT)
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#define IND_DONE (1 << IND_DONE_BIT)
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#define IND_SOURCE (1 << IND_SOURCE_BIT)
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#define IND_FLAGS (IND_DESTINATION | IND_INDIRECTION | IND_DONE | IND_SOURCE)
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#if !defined(__ASSEMBLY__)
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#include <asm/io.h>
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#include <uapi/linux/kexec.h>
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#ifdef CONFIG_KEXEC_CORE
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#include <linux/list.h>
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#include <linux/linkage.h>
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#include <linux/compat.h>
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#include <linux/ioport.h>
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#include <linux/elfcore.h>
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#include <linux/elf.h>
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#include <linux/module.h>
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#include <asm/kexec.h>
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/* Verify architecture specific macros are defined */
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#ifndef KEXEC_SOURCE_MEMORY_LIMIT
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#error KEXEC_SOURCE_MEMORY_LIMIT not defined
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#endif
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#ifndef KEXEC_DESTINATION_MEMORY_LIMIT
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#error KEXEC_DESTINATION_MEMORY_LIMIT not defined
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#endif
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#ifndef KEXEC_CONTROL_MEMORY_LIMIT
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#error KEXEC_CONTROL_MEMORY_LIMIT not defined
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#endif
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#ifndef KEXEC_CONTROL_MEMORY_GFP
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#define KEXEC_CONTROL_MEMORY_GFP (GFP_KERNEL | __GFP_NORETRY)
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#endif
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#ifndef KEXEC_CONTROL_PAGE_SIZE
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#error KEXEC_CONTROL_PAGE_SIZE not defined
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#endif
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#ifndef KEXEC_ARCH
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#error KEXEC_ARCH not defined
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#endif
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#ifndef KEXEC_CRASH_CONTROL_MEMORY_LIMIT
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#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT KEXEC_CONTROL_MEMORY_LIMIT
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#endif
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#ifndef KEXEC_CRASH_MEM_ALIGN
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#define KEXEC_CRASH_MEM_ALIGN PAGE_SIZE
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#endif
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#define KEXEC_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
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#define KEXEC_CORE_NOTE_NAME "CORE"
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#define KEXEC_CORE_NOTE_NAME_BYTES ALIGN(sizeof(KEXEC_CORE_NOTE_NAME), 4)
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#define KEXEC_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
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/*
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* The per-cpu notes area is a list of notes terminated by a "NULL"
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* note header. For kdump, the code in vmcore.c runs in the context
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* of the second kernel to combine them into one note.
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*/
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#ifndef KEXEC_NOTE_BYTES
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#define KEXEC_NOTE_BYTES ( (KEXEC_NOTE_HEAD_BYTES * 2) + \
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KEXEC_CORE_NOTE_NAME_BYTES + \
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KEXEC_CORE_NOTE_DESC_BYTES )
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#endif
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/*
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* This structure is used to hold the arguments that are used when loading
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* kernel binaries.
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*/
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typedef unsigned long kimage_entry_t;
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struct kexec_segment {
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/*
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* This pointer can point to user memory if kexec_load() system
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* call is used or will point to kernel memory if
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* kexec_file_load() system call is used.
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*
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* Use ->buf when expecting to deal with user memory and use ->kbuf
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* when expecting to deal with kernel memory.
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*/
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union {
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void __user *buf;
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void *kbuf;
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};
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size_t bufsz;
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unsigned long mem;
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size_t memsz;
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};
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#ifdef CONFIG_COMPAT
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struct compat_kexec_segment {
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compat_uptr_t buf;
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compat_size_t bufsz;
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compat_ulong_t mem; /* User space sees this as a (void *) ... */
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compat_size_t memsz;
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};
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#endif
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#ifdef CONFIG_KEXEC_FILE
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struct purgatory_info {
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/* Pointer to elf header of read only purgatory */
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Elf_Ehdr *ehdr;
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/* Pointer to purgatory sechdrs which are modifiable */
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Elf_Shdr *sechdrs;
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/*
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* Temporary buffer location where purgatory is loaded and relocated
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* This memory can be freed post image load
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*/
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void *purgatory_buf;
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/* Address where purgatory is finally loaded and is executed from */
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unsigned long purgatory_load_addr;
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};
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typedef int (kexec_probe_t)(const char *kernel_buf, unsigned long kernel_size);
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typedef void *(kexec_load_t)(struct kimage *image, char *kernel_buf,
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unsigned long kernel_len, char *initrd,
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unsigned long initrd_len, char *cmdline,
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unsigned long cmdline_len);
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typedef int (kexec_cleanup_t)(void *loader_data);
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#ifdef CONFIG_KEXEC_VERIFY_SIG
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typedef int (kexec_verify_sig_t)(const char *kernel_buf,
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unsigned long kernel_len);
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#endif
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struct kexec_file_ops {
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kexec_probe_t *probe;
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kexec_load_t *load;
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kexec_cleanup_t *cleanup;
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#ifdef CONFIG_KEXEC_VERIFY_SIG
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kexec_verify_sig_t *verify_sig;
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#endif
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};
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/**
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* struct kexec_buf - parameters for finding a place for a buffer in memory
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* @image: kexec image in which memory to search.
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* @buffer: Contents which will be copied to the allocated memory.
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* @bufsz: Size of @buffer.
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* @mem: On return will have address of the buffer in memory.
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* @memsz: Size for the buffer in memory.
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* @buf_align: Minimum alignment needed.
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* @buf_min: The buffer can't be placed below this address.
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* @buf_max: The buffer can't be placed above this address.
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* @top_down: Allocate from top of memory.
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*/
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struct kexec_buf {
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struct kimage *image;
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void *buffer;
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unsigned long bufsz;
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unsigned long mem;
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unsigned long memsz;
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unsigned long buf_align;
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unsigned long buf_min;
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unsigned long buf_max;
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bool top_down;
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};
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int __weak arch_kexec_walk_mem(struct kexec_buf *kbuf,
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int (*func)(u64, u64, void *));
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extern int kexec_add_buffer(struct kexec_buf *kbuf);
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int kexec_locate_mem_hole(struct kexec_buf *kbuf);
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#endif /* CONFIG_KEXEC_FILE */
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struct kimage {
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kimage_entry_t head;
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kimage_entry_t *entry;
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kimage_entry_t *last_entry;
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unsigned long start;
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struct page *control_code_page;
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struct page *swap_page;
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unsigned long nr_segments;
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struct kexec_segment segment[KEXEC_SEGMENT_MAX];
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struct list_head control_pages;
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struct list_head dest_pages;
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struct list_head unusable_pages;
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/* Address of next control page to allocate for crash kernels. */
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unsigned long control_page;
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/* Flags to indicate special processing */
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unsigned int type : 1;
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#define KEXEC_TYPE_DEFAULT 0
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#define KEXEC_TYPE_CRASH 1
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unsigned int preserve_context : 1;
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/* If set, we are using file mode kexec syscall */
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unsigned int file_mode:1;
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#ifdef ARCH_HAS_KIMAGE_ARCH
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struct kimage_arch arch;
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#endif
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#ifdef CONFIG_KEXEC_FILE
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/* Additional fields for file based kexec syscall */
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void *kernel_buf;
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unsigned long kernel_buf_len;
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void *initrd_buf;
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unsigned long initrd_buf_len;
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char *cmdline_buf;
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unsigned long cmdline_buf_len;
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/* File operations provided by image loader */
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struct kexec_file_ops *fops;
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/* Image loader handling the kernel can store a pointer here */
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void *image_loader_data;
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/* Information for loading purgatory */
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struct purgatory_info purgatory_info;
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#endif
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};
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/* kexec interface functions */
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extern void machine_kexec(struct kimage *image);
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extern int machine_kexec_prepare(struct kimage *image);
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extern void machine_kexec_cleanup(struct kimage *image);
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extern asmlinkage long sys_kexec_load(unsigned long entry,
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unsigned long nr_segments,
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struct kexec_segment __user *segments,
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unsigned long flags);
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extern int kernel_kexec(void);
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extern struct page *kimage_alloc_control_pages(struct kimage *image,
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unsigned int order);
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extern int kexec_load_purgatory(struct kimage *image, unsigned long min,
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unsigned long max, int top_down,
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unsigned long *load_addr);
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extern int kexec_purgatory_get_set_symbol(struct kimage *image,
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const char *name, void *buf,
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unsigned int size, bool get_value);
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extern void *kexec_purgatory_get_symbol_addr(struct kimage *image,
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const char *name);
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extern void __crash_kexec(struct pt_regs *);
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extern void crash_kexec(struct pt_regs *);
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int kexec_should_crash(struct task_struct *);
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int kexec_crash_loaded(void);
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void crash_save_cpu(struct pt_regs *regs, int cpu);
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void crash_save_vmcoreinfo(void);
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void arch_crash_save_vmcoreinfo(void);
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__printf(1, 2)
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void vmcoreinfo_append_str(const char *fmt, ...);
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phys_addr_t paddr_vmcoreinfo_note(void);
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#define VMCOREINFO_OSRELEASE(value) \
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vmcoreinfo_append_str("OSRELEASE=%s\n", value)
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#define VMCOREINFO_PAGESIZE(value) \
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vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
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#define VMCOREINFO_SYMBOL(name) \
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vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
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#define VMCOREINFO_SIZE(name) \
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vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
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(unsigned long)sizeof(name))
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#define VMCOREINFO_STRUCT_SIZE(name) \
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vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
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(unsigned long)sizeof(struct name))
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#define VMCOREINFO_OFFSET(name, field) \
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vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
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(unsigned long)offsetof(struct name, field))
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#define VMCOREINFO_LENGTH(name, value) \
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vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
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#define VMCOREINFO_NUMBER(name) \
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vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
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#define VMCOREINFO_CONFIG(name) \
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vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
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extern struct kimage *kexec_image;
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extern struct kimage *kexec_crash_image;
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extern int kexec_load_disabled;
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#ifndef kexec_flush_icache_page
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#define kexec_flush_icache_page(page)
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#endif
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/* List of defined/legal kexec flags */
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#ifndef CONFIG_KEXEC_JUMP
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#define KEXEC_FLAGS KEXEC_ON_CRASH
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#else
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#define KEXEC_FLAGS (KEXEC_ON_CRASH | KEXEC_PRESERVE_CONTEXT)
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#endif
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/* List of defined/legal kexec file flags */
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#define KEXEC_FILE_FLAGS (KEXEC_FILE_UNLOAD | KEXEC_FILE_ON_CRASH | \
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KEXEC_FILE_NO_INITRAMFS)
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#define VMCOREINFO_BYTES (4096)
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#define VMCOREINFO_NOTE_NAME "VMCOREINFO"
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#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
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#define VMCOREINFO_NOTE_SIZE (KEXEC_NOTE_HEAD_BYTES*2 + VMCOREINFO_BYTES \
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+ VMCOREINFO_NOTE_NAME_BYTES)
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/* Location of a reserved region to hold the crash kernel.
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*/
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extern struct resource crashk_res;
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extern struct resource crashk_low_res;
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typedef u32 note_buf_t[KEXEC_NOTE_BYTES/4];
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extern note_buf_t __percpu *crash_notes;
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extern u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4];
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extern size_t vmcoreinfo_size;
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extern size_t vmcoreinfo_max_size;
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/* flag to track if kexec reboot is in progress */
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extern bool kexec_in_progress;
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int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
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unsigned long long *crash_size, unsigned long long *crash_base);
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int parse_crashkernel_high(char *cmdline, unsigned long long system_ram,
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unsigned long long *crash_size, unsigned long long *crash_base);
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int parse_crashkernel_low(char *cmdline, unsigned long long system_ram,
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unsigned long long *crash_size, unsigned long long *crash_base);
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int crash_shrink_memory(unsigned long new_size);
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size_t crash_get_memory_size(void);
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void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
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int __weak arch_kexec_kernel_image_probe(struct kimage *image, void *buf,
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unsigned long buf_len);
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void * __weak arch_kexec_kernel_image_load(struct kimage *image);
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int __weak arch_kimage_file_post_load_cleanup(struct kimage *image);
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int __weak arch_kexec_kernel_verify_sig(struct kimage *image, void *buf,
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unsigned long buf_len);
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int __weak arch_kexec_apply_relocations_add(const Elf_Ehdr *ehdr,
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Elf_Shdr *sechdrs, unsigned int relsec);
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int __weak arch_kexec_apply_relocations(const Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
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unsigned int relsec);
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void arch_kexec_protect_crashkres(void);
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void arch_kexec_unprotect_crashkres(void);
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#ifndef page_to_boot_pfn
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static inline unsigned long page_to_boot_pfn(struct page *page)
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{
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return page_to_pfn(page);
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}
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#endif
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#ifndef boot_pfn_to_page
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static inline struct page *boot_pfn_to_page(unsigned long boot_pfn)
|
|
{
|
|
return pfn_to_page(boot_pfn);
|
|
}
|
|
#endif
|
|
|
|
#ifndef phys_to_boot_phys
|
|
static inline unsigned long phys_to_boot_phys(phys_addr_t phys)
|
|
{
|
|
return phys;
|
|
}
|
|
#endif
|
|
|
|
#ifndef boot_phys_to_phys
|
|
static inline phys_addr_t boot_phys_to_phys(unsigned long boot_phys)
|
|
{
|
|
return boot_phys;
|
|
}
|
|
#endif
|
|
|
|
static inline unsigned long virt_to_boot_phys(void *addr)
|
|
{
|
|
return phys_to_boot_phys(__pa((unsigned long)addr));
|
|
}
|
|
|
|
static inline void *boot_phys_to_virt(unsigned long entry)
|
|
{
|
|
return phys_to_virt(boot_phys_to_phys(entry));
|
|
}
|
|
|
|
#else /* !CONFIG_KEXEC_CORE */
|
|
struct pt_regs;
|
|
struct task_struct;
|
|
static inline void __crash_kexec(struct pt_regs *regs) { }
|
|
static inline void crash_kexec(struct pt_regs *regs) { }
|
|
static inline int kexec_should_crash(struct task_struct *p) { return 0; }
|
|
static inline int kexec_crash_loaded(void) { return 0; }
|
|
#define kexec_in_progress false
|
|
#endif /* CONFIG_KEXEC_CORE */
|
|
|
|
#endif /* !defined(__ASSEBMLY__) */
|
|
|
|
#endif /* LINUX_KEXEC_H */
|