^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * machine_kexec.c for kexec
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Created by <nschichan@corp.free.fr> on Thu Oct 12 15:15:06 2006
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/kexec.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/libfdt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) extern const unsigned char relocate_new_kernel[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) extern const size_t relocate_new_kernel_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) extern unsigned long kexec_start_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) extern unsigned long kexec_indirection_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static unsigned long reboot_code_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static void (*relocated_kexec_smp_wait)(void *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) atomic_t kexec_ready_to_reboot = ATOMIC_INIT(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) void (*_crash_smp_send_stop)(void) = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) void (*_machine_kexec_shutdown)(void) = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) void (*_machine_crash_shutdown)(struct pt_regs *regs) = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static void kexec_image_info(const struct kimage *kimage)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) unsigned long i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) pr_debug("kexec kimage info:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) pr_debug(" type: %d\n", kimage->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) pr_debug(" start: %lx\n", kimage->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) pr_debug(" head: %lx\n", kimage->head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) pr_debug(" nr_segments: %lu\n", kimage->nr_segments);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) for (i = 0; i < kimage->nr_segments; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) pr_debug(" segment[%lu]: %016lx - %016lx, 0x%lx bytes, %lu pages\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) i,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) kimage->segment[i].mem,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) kimage->segment[i].mem + kimage->segment[i].memsz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) (unsigned long)kimage->segment[i].memsz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) (unsigned long)kimage->segment[i].memsz / PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #ifdef CONFIG_UHI_BOOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int uhi_machine_kexec_prepare(struct kimage *kimage)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * In case DTB file is not passed to the new kernel, a flat device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * tree will be created by kexec tool. It holds modified command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * line for the new kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) for (i = 0; i < kimage->nr_segments; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct fdt_header fdt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (kimage->segment[i].memsz <= sizeof(fdt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (copy_from_user(&fdt, kimage->segment[i].buf, sizeof(fdt)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (fdt_check_header(&fdt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) kexec_args[0] = -2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) kexec_args[1] = (unsigned long)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) phys_to_virt((unsigned long)kimage->segment[i].mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int (*_machine_kexec_prepare)(struct kimage *) = uhi_machine_kexec_prepare;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) int (*_machine_kexec_prepare)(struct kimage *) = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #endif /* CONFIG_UHI_BOOT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) machine_kexec_prepare(struct kimage *kimage)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!kexec_nonboot_cpu_func())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) kexec_image_info(kimage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (_machine_kexec_prepare)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return _machine_kexec_prepare(kimage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) machine_kexec_cleanup(struct kimage *kimage)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static void kexec_shutdown_secondary(void *param)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) int cpu = smp_processor_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (!cpu_online(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /* We won't be sent IPIs any more. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) set_cpu_online(cpu, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) while (!atomic_read(&kexec_ready_to_reboot))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) cpu_relax();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) kexec_reboot();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /* NOTREACHED */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) machine_shutdown(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (_machine_kexec_shutdown)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) _machine_kexec_shutdown();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) smp_call_function(kexec_shutdown_secondary, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) while (num_online_cpus() > 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) cpu_relax();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) mdelay(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) machine_crash_shutdown(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (_machine_crash_shutdown)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) _machine_crash_shutdown(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) default_machine_crash_shutdown(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) void kexec_nonboot_cpu_jump(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) local_flush_icache_range((unsigned long)relocated_kexec_smp_wait,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) reboot_code_buffer + relocate_new_kernel_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) relocated_kexec_smp_wait(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) void kexec_reboot(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) void (*do_kexec)(void) __noreturn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * We know we were online, and there will be no incoming IPIs at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * this point. Mark online again before rebooting so that the crash
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * analysis tool will see us correctly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) set_cpu_online(smp_processor_id(), true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /* Ensure remote CPUs observe that we're online before rebooting. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) smp_mb__after_atomic();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (smp_processor_id() > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * Instead of cpu_relax() or wait, this is needed for kexec
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * smp reboot. Kdump usually doesn't require an smp new
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * kernel, but kexec may do.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) kexec_nonboot_cpu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* NOTREACHED */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * Make sure we get correct instructions written by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * machine_kexec() CPU.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) local_flush_icache_range(reboot_code_buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) reboot_code_buffer + relocate_new_kernel_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) do_kexec = (void *)reboot_code_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) do_kexec();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) machine_kexec(struct kimage *image)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) unsigned long entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) unsigned long *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) reboot_code_buffer =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) (unsigned long)page_address(image->control_code_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) kexec_start_address =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) (unsigned long) phys_to_virt(image->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (image->type == KEXEC_TYPE_DEFAULT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) kexec_indirection_page =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) (unsigned long) phys_to_virt(image->head & PAGE_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) kexec_indirection_page = (unsigned long)&image->head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) memcpy((void*)reboot_code_buffer, relocate_new_kernel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) relocate_new_kernel_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * The generic kexec code builds a page list with physical
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * addresses. they are directly accessible through KSEG0 (or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * CKSEG0 or XPHYS if on 64bit system), hence the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * phys_to_virt() call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) for (ptr = &image->head; (entry = *ptr) && !(entry &IND_DONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) ptr = (entry & IND_INDIRECTION) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) phys_to_virt(entry & PAGE_MASK) : ptr + 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) *ptr & IND_DESTINATION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) *ptr = (unsigned long) phys_to_virt(*ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) /* Mark offline BEFORE disabling local irq. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) set_cpu_online(smp_processor_id(), false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * we do not want to be bothered.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) printk("Will call new kernel at %08lx\n", image->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) printk("Bye ...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) /* Make reboot code buffer available to the boot CPU. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) __flush_cache_all();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) /* All secondary cpus now may jump to kexec_wait cycle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) relocated_kexec_smp_wait = reboot_code_buffer +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) (void *)(kexec_smp_wait - relocate_new_kernel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) smp_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) atomic_set(&kexec_ready_to_reboot, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) kexec_reboot();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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