diff options
| -rw-r--r-- | arch/arm64/mm/ktext.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm64/mm/ktext.c b/arch/arm64/mm/ktext.c index 901f159c65e6..4c803b89fcfe 100644 --- a/arch/arm64/mm/ktext.c +++ b/arch/arm64/mm/ktext.c @@ -4,14 +4,23 @@ */ #include <linux/kernel.h> +#include <linux/memblock.h> +#include <linux/numa.h> #include <linux/pgtable.h> +#include <linux/string.h> +#include <asm/cacheflush.h> #include <asm/ktext.h> #include <asm/memory.h> +static void *kernel_texts[MAX_NUMNODES]; + +/* Allocate memory for the replicated kernel texts. */ void __init ktext_replication_init(void) { + size_t size = _etext - _stext; int kidx = pgd_index((phys_addr_t)KERNEL_START); + int nid; /* * If we've messed up and the kernel shares a L0 entry with the @@ -26,4 +35,16 @@ void __init ktext_replication_init(void) pr_warn("Kernel is located in the same L0 index as vmalloc - text replication disabled\n"); return; } + + for_each_node(nid) { + /* Nothing to do for node 0 */ + if (!nid) + continue; + + /* Allocate and copy initial kernel text for this node */ + kernel_texts[nid] = memblock_alloc_node(size, PAGE_SIZE, nid); + memcpy(kernel_texts[nid], _stext, size); + caches_clean_inval_pou((u64)kernel_texts[nid], + (u64)kernel_texts[nid] + size); + } } |