diff options
Diffstat (limited to 'arch/ia64/kernel/machine_kexec.c')
| -rw-r--r-- | arch/ia64/kernel/machine_kexec.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c new file mode 100644 index 000000000..efc9b5684 --- /dev/null +++ b/arch/ia64/kernel/machine_kexec.c @@ -0,0 +1,162 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * arch/ia64/kernel/machine_kexec.c + * + * Handle transition of Linux booting another kernel + * Copyright (C) 2005 Hewlett-Packard Development Comapny, L.P. + * Copyright (C) 2005 Khalid Aziz <khalid.aziz@hp.com> + * Copyright (C) 2006 Intel Corp, Zou Nan hai <nanhai.zou@intel.com> + */ + +#include <linux/mm.h> +#include <linux/kexec.h> +#include <linux/cpu.h> +#include <linux/irq.h> +#include <linux/efi.h> +#include <linux/numa.h> +#include <linux/mmzone.h> + +#include <asm/numa.h> +#include <asm/mmu_context.h> +#include <asm/setup.h> +#include <asm/delay.h> +#include <asm/meminit.h> +#include <asm/processor.h> +#include <asm/sal.h> +#include <asm/mca.h> + +typedef void (*relocate_new_kernel_t)( + unsigned long indirection_page, + unsigned long start_address, + struct ia64_boot_param *boot_param, + unsigned long pal_addr) __noreturn; + +struct kimage *ia64_kimage; + +struct resource efi_memmap_res = { + .name = "EFI Memory Map", + .start = 0, + .end = 0, + .flags = IORESOURCE_BUSY | IORESOURCE_MEM +}; + +struct resource boot_param_res = { + .name = "Boot parameter", + .start = 0, + .end = 0, + .flags = IORESOURCE_BUSY | IORESOURCE_MEM +}; + + +/* + * Do what every setup is needed on image and the + * reboot code buffer to allow us to avoid allocations + * later. + */ +int machine_kexec_prepare(struct kimage *image) +{ + void *control_code_buffer; + const unsigned long *func; + + func = (unsigned long *)&relocate_new_kernel; + /* Pre-load control code buffer to minimize work in kexec path */ + control_code_buffer = page_address(image->control_code_page); + memcpy((void *)control_code_buffer, (const void *)func[0], + relocate_new_kernel_size); + flush_icache_range((unsigned long)control_code_buffer, + (unsigned long)control_code_buffer + relocate_new_kernel_size); + ia64_kimage = image; + + return 0; +} + +void machine_kexec_cleanup(struct kimage *image) +{ +} + +/* + * Do not allocate memory (or fail in any way) in machine_kexec(). + * We are past the point of no return, committed to rebooting now. + */ +static void ia64_machine_kexec(struct unw_frame_info *info, void *arg) +{ + struct kimage *image = arg; + relocate_new_kernel_t rnk; + void *pal_addr = efi_get_pal_addr(); + unsigned long code_addr; + int ii; + u64 fp, gp; + ia64_fptr_t *init_handler = (ia64_fptr_t *)ia64_os_init_on_kdump; + + BUG_ON(!image); + code_addr = (unsigned long)page_address(image->control_code_page); + if (image->type == KEXEC_TYPE_CRASH) { + crash_save_this_cpu(); + current->thread.ksp = (__u64)info->sw - 16; + + /* Register noop init handler */ + fp = ia64_tpa(init_handler->fp); + gp = ia64_tpa(ia64_getreg(_IA64_REG_GP)); + ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, fp, gp, 0, fp, gp, 0); + } else { + /* Unregister init handlers of current kernel */ + ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, 0, 0, 0, 0, 0, 0); + } + + /* Unregister mca handler - No more recovery on current kernel */ + ia64_sal_set_vectors(SAL_VECTOR_OS_MCA, 0, 0, 0, 0, 0, 0); + + /* Interrupts aren't acceptable while we reboot */ + local_irq_disable(); + + /* Mask CMC and Performance Monitor interrupts */ + ia64_setreg(_IA64_REG_CR_PMV, 1 << 16); + ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16); + + /* Mask ITV and Local Redirect Registers */ + ia64_set_itv(1 << 16); + ia64_set_lrr0(1 << 16); + ia64_set_lrr1(1 << 16); + + /* terminate possible nested in-service interrupts */ + for (ii = 0; ii < 16; ii++) + ia64_eoi(); + + /* unmask TPR and clear any pending interrupts */ + ia64_setreg(_IA64_REG_CR_TPR, 0); + ia64_srlz_d(); + while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR) + ia64_eoi(); + rnk = (relocate_new_kernel_t)&code_addr; + (*rnk)(image->head, image->start, ia64_boot_param, + GRANULEROUNDDOWN((unsigned long) pal_addr)); + BUG(); +} + +void machine_kexec(struct kimage *image) +{ + BUG_ON(!image); + unw_init_running(ia64_machine_kexec, image); + for(;;); +} + +void arch_crash_save_vmcoreinfo(void) +{ +#if defined(CONFIG_DISCONTIGMEM) || defined(CONFIG_SPARSEMEM) + VMCOREINFO_SYMBOL(pgdat_list); + VMCOREINFO_LENGTH(pgdat_list, MAX_NUMNODES); +#endif +#ifdef CONFIG_NUMA + VMCOREINFO_SYMBOL(node_memblk); + VMCOREINFO_LENGTH(node_memblk, NR_NODE_MEMBLKS); + VMCOREINFO_STRUCT_SIZE(node_memblk_s); + VMCOREINFO_OFFSET(node_memblk_s, start_paddr); + VMCOREINFO_OFFSET(node_memblk_s, size); +#endif +#if CONFIG_PGTABLE_LEVELS == 3 + VMCOREINFO_CONFIG(PGTABLE_3); +#elif CONFIG_PGTABLE_LEVELS == 4 + VMCOREINFO_CONFIG(PGTABLE_4); +#endif +} + |