[PATCH v3 3/4] kaslr: disable memory mirror feature when movable_node specified

[Chao Fan]

In kernel code, if movable_node specified, it will skip the mirror
feature. So we should also skip mirror feature in kaslr.

Signed-off-by: Chao Fan <fanc.fnst@xxxxxxxxxxxxxx>
---
 arch/x86/boot/compressed/kaslr.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index e3a3b6132da0..fc798d6d608d 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -677,6 +677,7 @@ static bool
 process_efi_entries(unsigned long minimum, unsigned long image_size)
 {
 	struct efi_info *e = &boot_params->efi_info;
+	char *args = (char *)get_cmd_line_ptr();
 	bool efi_mirror_found = false;
 	struct mem_vector region;
 	efi_memory_desc_t *md;
@@ -702,11 +703,15 @@ process_efi_entries(unsigned long minimum, unsigned long image_size)
 #endif
 
 	nr_desc = e->efi_memmap_size / e->efi_memdesc_size;
-	for (i = 0; i < nr_desc; i++) {
-		md = efi_early_memdesc_ptr(pmap, e->efi_memdesc_size, i);
-		if (md->attribute & EFI_MEMORY_MORE_RELIABLE) {
-			efi_mirror_found = true;
-			break;
+
+	/* Skip memory mirror if movabale_node or immovable_mem specified */
+	if (!strstr(args, "movable_node") && !strstr(args, "immovable_mem")) {
+		for (i = 0; i < nr_desc; i++) {
+			md = efi_early_memdesc_ptr(pmap, e->efi_memdesc_size, i);
+			if (md->attribute & EFI_MEMORY_MORE_RELIABLE) {
+				efi_mirror_found = true;
+				break;
+			}
 		}
 	}
 
-- 
2.14.3