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Diffstat (limited to 'arch/powerpc/include/asm/kexec.h')
| -rw-r--r-- | arch/powerpc/include/asm/kexec.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h new file mode 100644 index 000000000..4a585cba1 --- /dev/null +++ b/arch/powerpc/include/asm/kexec.h @@ -0,0 +1,152 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_KEXEC_H +#define _ASM_POWERPC_KEXEC_H +#ifdef __KERNEL__ + +#if defined(CONFIG_FSL_BOOKE) || 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 int default_machine_kexec_prepare(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_secondary(struct pt_regs *regs); +extern int 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; +} + +#ifdef CONFIG_KEXEC_FILE +extern const struct kexec_file_ops kexec_elf64_ops; + +#ifdef CONFIG_IMA_KEXEC +#define ARCH_HAS_KIMAGE_ARCH + +struct kimage_arch { + phys_addr_t ima_buffer_addr; + size_t ima_buffer_size; +}; +#endif + +int setup_purgatory(struct kimage *image, const void *slave_code, + const void *fdt, unsigned long kernel_load_addr, + unsigned long fdt_load_addr); +int setup_new_fdt(const struct kimage *image, void *fdt, + unsigned long initrd_load_addr, unsigned long initrd_len, + const char *cmdline); +int delete_fdt_mem_rsv(void *fdt, unsigned long start, unsigned long size); +#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 */ +#endif /* ! __ASSEMBLY__ */ +#endif /* __KERNEL__ */ +#endif /* _ASM_POWERPC_KEXEC_H */ |