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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/powerpc/include/asm/kexec.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/include/asm/kexec.h')
-rw-r--r--arch/powerpc/include/asm/kexec.h197
1 files changed, 197 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
new file mode 100644
index 0000000000..a1ddba01e7
--- /dev/null
+++ b/arch/powerpc/include/asm/kexec.h
@@ -0,0 +1,197 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_KEXEC_H
+#define _ASM_POWERPC_KEXEC_H
+#ifdef __KERNEL__
+
+#if defined(CONFIG_PPC_85xx) || defined(CONFIG_44x)
+
+/*
+ * On FSL-BookE we setup a 1:1 mapping which covers the first 2GiB of memory
+ * and therefore we can only deal with memory within this range
+ */
+#define KEXEC_SOURCE_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
+#define KEXEC_DESTINATION_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
+#define KEXEC_CONTROL_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
+
+#else
+
+/*
+ * Maximum page that is mapped directly into kernel memory.
+ * XXX: Since we copy virt we can use any page we allocate
+ */
+#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
+
+/*
+ * Maximum address we can reach in physical address mode.
+ * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
+ */
+#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
+
+/* Maximum address we can use for the control code buffer */
+#ifdef __powerpc64__
+#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
+#else
+/* TASK_SIZE, probably left over from use_mm ?? */
+#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
+#endif
+#endif
+
+#define KEXEC_CONTROL_PAGE_SIZE 4096
+
+/* The native architecture */
+#ifdef __powerpc64__
+#define KEXEC_ARCH KEXEC_ARCH_PPC64
+#else
+#define KEXEC_ARCH KEXEC_ARCH_PPC
+#endif
+
+#define KEXEC_STATE_NONE 0
+#define KEXEC_STATE_IRQS_OFF 1
+#define KEXEC_STATE_REAL_MODE 2
+
+#ifndef __ASSEMBLY__
+#include <asm/reg.h>
+
+typedef void (*crash_shutdown_t)(void);
+
+#ifdef CONFIG_KEXEC_CORE
+
+/*
+ * This function is responsible for capturing register states if coming
+ * via panic or invoking dump using sysrq-trigger.
+ */
+static inline void crash_setup_regs(struct pt_regs *newregs,
+ struct pt_regs *oldregs)
+{
+ if (oldregs)
+ memcpy(newregs, oldregs, sizeof(*newregs));
+ else
+ ppc_save_regs(newregs);
+}
+
+extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
+ master to copy new code to 0 */
+extern int crashing_cpu;
+extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
+extern void crash_ipi_callback(struct pt_regs *);
+extern int crash_wake_offline;
+
+struct kimage;
+struct pt_regs;
+extern void default_machine_kexec(struct kimage *image);
+extern void default_machine_crash_shutdown(struct pt_regs *regs);
+extern int crash_shutdown_register(crash_shutdown_t handler);
+extern int crash_shutdown_unregister(crash_shutdown_t handler);
+
+extern void crash_kexec_prepare(void);
+extern void crash_kexec_secondary(struct pt_regs *regs);
+int __init overlaps_crashkernel(unsigned long start, unsigned long size);
+extern void reserve_crashkernel(void);
+extern void machine_kexec_mask_interrupts(void);
+
+static inline bool kdump_in_progress(void)
+{
+ return crashing_cpu >= 0;
+}
+
+void relocate_new_kernel(unsigned long indirection_page, unsigned long reboot_code_buffer,
+ unsigned long start_address) __noreturn;
+
+void kexec_copy_flush(struct kimage *image);
+
+#if defined(CONFIG_CRASH_DUMP) && defined(CONFIG_PPC_RTAS)
+void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
+#define crash_free_reserved_phys_range crash_free_reserved_phys_range
+#endif
+
+#ifdef CONFIG_KEXEC_FILE
+extern const struct kexec_file_ops kexec_elf64_ops;
+
+#define ARCH_HAS_KIMAGE_ARCH
+
+struct kimage_arch {
+ struct crash_mem *exclude_ranges;
+
+ unsigned long backup_start;
+ void *backup_buf;
+ void *fdt;
+};
+
+char *setup_kdump_cmdline(struct kimage *image, char *cmdline,
+ unsigned long cmdline_len);
+int setup_purgatory(struct kimage *image, const void *slave_code,
+ const void *fdt, unsigned long kernel_load_addr,
+ unsigned long fdt_load_addr);
+
+#ifdef CONFIG_PPC64
+struct kexec_buf;
+
+int arch_kexec_kernel_image_probe(struct kimage *image, void *buf, unsigned long buf_len);
+#define arch_kexec_kernel_image_probe arch_kexec_kernel_image_probe
+
+int arch_kimage_file_post_load_cleanup(struct kimage *image);
+#define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
+
+int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf);
+#define arch_kexec_locate_mem_hole arch_kexec_locate_mem_hole
+
+int load_crashdump_segments_ppc64(struct kimage *image,
+ struct kexec_buf *kbuf);
+int setup_purgatory_ppc64(struct kimage *image, const void *slave_code,
+ const void *fdt, unsigned long kernel_load_addr,
+ unsigned long fdt_load_addr);
+unsigned int kexec_extra_fdt_size_ppc64(struct kimage *image);
+int setup_new_fdt_ppc64(const struct kimage *image, void *fdt,
+ unsigned long initrd_load_addr,
+ unsigned long initrd_len, const char *cmdline);
+#endif /* CONFIG_PPC64 */
+
+#endif /* CONFIG_KEXEC_FILE */
+
+#else /* !CONFIG_KEXEC_CORE */
+static inline void crash_kexec_secondary(struct pt_regs *regs) { }
+
+static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
+{
+ return 0;
+}
+
+static inline void reserve_crashkernel(void) { ; }
+
+static inline int crash_shutdown_register(crash_shutdown_t handler)
+{
+ return 0;
+}
+
+static inline int crash_shutdown_unregister(crash_shutdown_t handler)
+{
+ return 0;
+}
+
+static inline bool kdump_in_progress(void)
+{
+ return false;
+}
+
+static inline void crash_ipi_callback(struct pt_regs *regs) { }
+
+static inline void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *))
+{
+}
+
+#endif /* CONFIG_KEXEC_CORE */
+
+#ifdef CONFIG_PPC_BOOK3S_64
+#include <asm/book3s/64/kexec.h>
+#endif
+
+#ifndef reset_sprs
+#define reset_sprs reset_sprs
+static inline void reset_sprs(void)
+{
+}
+#endif
+
+#endif /* ! __ASSEMBLY__ */
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_KEXEC_H */