From b2b569151867bca996656380a0d773cbf92719ef Mon Sep 17 00:00:00 2001

Message-Id: <b2b569151867bca996656380a0d773cbf92719ef.1429703426.git.panand@redhat.com>

In-Reply-To: <de1db775d6e9b51f014442677863b57b8566c510.1429703426.git.panand@redhat.com>

References: <de1db775d6e9b51f014442677863b57b8566c510.1429703426.git.panand@redhat.com>

From: AKASHI Takahiro <takahiro.akashi@linaro.org>

Date: Wed, 22 Apr 2015 11:21:05 +0900

Subject: [PATCH 13/15] arm64: remove restriction on the segments order

Done by changing locate_hole() to add_buffer_phys_virt() in

load_other_segments() since locate_hole() assumes that the segments in

struct info be sorted properly.

This also simplifies the difference between kexec case and kdump case.

---

 kexec/arch/arm64/kexec-arm64.c | 57 +++++++++++++++---------------------------

 1 file changed, 20 insertions(+), 37 deletions(-)

diff --git a/kexec/arch/arm64/kexec-arm64.c b/kexec/arch/arm64/kexec-arm64.c

index 190037c75186..d884c7c1707d 100644

--- a/kexec/arch/arm64/kexec-arm64.c

+++ b/kexec/arch/arm64/kexec-arm64.c

@@ -590,11 +590,10 @@ int arm64_load_other_segments(struct kexec_info *info,

 {

 	int result;

 	struct mem_ehdr ehdr;

-	unsigned long dtb_max;

 	unsigned long dtb_base;

+	unsigned long hole_min, hole_max;

 	char *initrd_buf = NULL;

 	uint64_t purgatory_sink;

-	unsigned long purgatory_base;

 	struct dtb dtb_1 = {.name = "dtb_1"};

 	struct dtb dtb_2 = {.name = "dtb_2"};

 	char command_line[COMMAND_LINE_SIZE] = "";

@@ -648,27 +647,15 @@ int arm64_load_other_segments(struct kexec_info *info,

 	 * to the DTB size for any DTB growth.

 	 */

-	dtb_max = dtb_2.size + 2 * 1024;

-

-	if (info->kexec_flags & KEXEC_ON_CRASH)

-		dtb_base = locate_dtb_in_crashmem(info, dtb_max);

-	else

-		dtb_base = locate_hole(info, dtb_max, 128UL * 1024,

-			arm64_mem.memstart + arm64_mem.text_offset

-				+ arm64_mem.image_size,

-			_ALIGN_UP(arm64_mem.memstart + arm64_mem.text_offset,

-				512UL * 1024 * 1024),

-			1);

-

-	dbgprintf("dtb:    base %lx, size %lxh (%ld)\n", dtb_base, dtb_2.size,

-		dtb_2.size);

-

-	if (dtb_base == ULONG_MAX)

-		return -ENOMEM;

-

-	purgatory_base = dtb_base + dtb_2.size;

-	initrd_base = 0;

-	initrd_size = 0;

+	if (info->kexec_flags & KEXEC_ON_CRASH) {

+		hole_min = crash_reserved_mem.start + arm64_mem.text_offset

+				+ arm64_mem.image_size;

+		hole_max = crash_reserved_mem.end;

+	} else {

+		hole_min = arm64_mem.memstart + arm64_mem.text_offset

+				+ arm64_mem.image_size;

+		hole_max = ULONG_MAX;

+	}

 	if (arm64_opts.initrd) {

 		initrd_buf = slurp_file(arm64_opts.initrd, &initrd_size);

@@ -679,8 +666,9 @@ int arm64_load_other_segments(struct kexec_info *info,

 			/* Put the initrd after the DTB with an alignment of

 			 * page size. */

-			initrd_base = locate_hole(info, initrd_size, 0,

-				dtb_base + dtb_max, -1, 1);

+			initrd_base = add_buffer_phys_virt(info, initrd_buf,

+				initrd_size, initrd_size, 0,

+				hole_min, hole_max, 1, 0);

 			dbgprintf("initrd: base %lx, size %lxh (%ld)\n",

 				initrd_base, initrd_size, initrd_size);

@@ -694,22 +682,17 @@ int arm64_load_other_segments(struct kexec_info *info,

 			if (result)

 				return result;

-

-			purgatory_base = initrd_base + initrd_size;

 		}

 	}

-	if (dtb_2.size > dtb_max) {

-		fprintf(stderr, "%s: Error: Too many DTB mods.\n", __func__);

-		return -EINVAL;

-	}

+	dtb_base = add_buffer_phys_virt(info, dtb_2.buf, dtb_2.size, dtb_2.size,

+			128UL * 1024, hole_min, hole_max, 1, 0);

-	add_segment_phys_virt(info, dtb_2.buf, dtb_2.size, dtb_base,

-		dtb_2.size, 0);

+	dbgprintf("dtb:    base %lx, size %lxh (%ld)\n", dtb_base, dtb_2.size,

+		dtb_2.size);

-	if (arm64_opts.initrd)

-		add_segment_phys_virt(info, initrd_buf, initrd_size,

-				initrd_base, initrd_size, 0);

+	if (dtb_base == ULONG_MAX)

+		return -ENOMEM;

 	if (arm64_opts.lite)

 		info->entry = (void *)kernel_entry;

@@ -724,7 +707,7 @@ int arm64_load_other_segments(struct kexec_info *info,

 		}

 		elf_rel_build_load(info, &info->rhdr, purgatory, purgatory_size,

-			purgatory_base, ULONG_MAX, 1, 0);

+			hole_min, hole_max, 1, 0);

 		info->entry = (void *)elf_rel_get_addr(&info->rhdr,

 			"purgatory_start");

-- 

2.1.0