diff options
Diffstat (limited to 'include/linux/memblock.h')
| -rw-r--r-- | include/linux/memblock.h | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/include/linux/memblock.h b/include/linux/memblock.h index ef5a1ecc6e59..bb19a2534224 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -42,6 +42,14 @@ extern unsigned long long max_possible_pfn; * kernel resource tree. * @MEMBLOCK_RSRV_NOINIT: memory region for which struct pages are * not initialized (only for reserved regions). + * @MEMBLOCK_RSRV_KERN: memory region that is reserved for kernel use, + * either explictitly with memblock_reserve_kern() or via memblock + * allocation APIs. All memblock allocations set this flag. + * @MEMBLOCK_KHO_SCRATCH: memory region that kexec can pass to the next + * kernel in handover mode. During early boot, we do not know about all + * memory reservations yet, so we get scratch memory from the previous + * kernel that we know is good to use. It is the only memory that + * allocations may happen from in this phase. */ enum memblock_flags { MEMBLOCK_NONE = 0x0, /* No special request */ @@ -50,6 +58,8 @@ enum memblock_flags { MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */ MEMBLOCK_DRIVER_MANAGED = 0x8, /* always detected via a driver */ MEMBLOCK_RSRV_NOINIT = 0x10, /* don't initialize struct pages */ + MEMBLOCK_RSRV_KERN = 0x20, /* memory reserved for kernel use */ + MEMBLOCK_KHO_SCRATCH = 0x40, /* scratch memory for kexec handover */ }; /** @@ -116,7 +126,19 @@ int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid, int memblock_add(phys_addr_t base, phys_addr_t size); int memblock_remove(phys_addr_t base, phys_addr_t size); int memblock_phys_free(phys_addr_t base, phys_addr_t size); -int memblock_reserve(phys_addr_t base, phys_addr_t size); +int __memblock_reserve(phys_addr_t base, phys_addr_t size, int nid, + enum memblock_flags flags); + +static __always_inline int memblock_reserve(phys_addr_t base, phys_addr_t size) +{ + return __memblock_reserve(base, size, NUMA_NO_NODE, 0); +} + +static __always_inline int memblock_reserve_kern(phys_addr_t base, phys_addr_t size) +{ + return __memblock_reserve(base, size, NUMA_NO_NODE, MEMBLOCK_RSRV_KERN); +} + #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP int memblock_physmem_add(phys_addr_t base, phys_addr_t size); #endif @@ -132,6 +154,8 @@ int memblock_mark_mirror(phys_addr_t base, phys_addr_t size); int memblock_mark_nomap(phys_addr_t base, phys_addr_t size); int memblock_clear_nomap(phys_addr_t base, phys_addr_t size); int memblock_reserved_mark_noinit(phys_addr_t base, phys_addr_t size); +int memblock_mark_kho_scratch(phys_addr_t base, phys_addr_t size); +int memblock_clear_kho_scratch(phys_addr_t base, phys_addr_t size); void memblock_free(void *ptr, size_t size); void reset_all_zones_managed_pages(void); @@ -275,6 +299,11 @@ static inline bool memblock_is_driver_managed(struct memblock_region *m) return m->flags & MEMBLOCK_DRIVER_MANAGED; } +static inline bool memblock_is_kho_scratch(struct memblock_region *m) +{ + return m->flags & MEMBLOCK_KHO_SCRATCH; +} + int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, unsigned long *end_pfn); void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, @@ -476,6 +505,7 @@ static inline __init_memblock bool memblock_bottom_up(void) phys_addr_t memblock_phys_mem_size(void); phys_addr_t memblock_reserved_size(void); +phys_addr_t memblock_reserved_kern_size(phys_addr_t limit, int nid); unsigned long memblock_estimated_nr_free_pages(void); phys_addr_t memblock_start_of_DRAM(void); phys_addr_t memblock_end_of_DRAM(void); @@ -602,5 +632,14 @@ static inline void early_memtest(phys_addr_t start, phys_addr_t end) { } static inline void memtest_report_meminfo(struct seq_file *m) { } #endif +#ifdef CONFIG_MEMBLOCK_KHO_SCRATCH +void memblock_set_kho_scratch_only(void); +void memblock_clear_kho_scratch_only(void); +void memmap_init_kho_scratch_pages(void); +#else +static inline void memblock_set_kho_scratch_only(void) { } +static inline void memblock_clear_kho_scratch_only(void) { } +static inline void memmap_init_kho_scratch_pages(void) {} +#endif #endif /* _LINUX_MEMBLOCK_H */ |