Due to the kernel patch, commit e7cd190385d1 ("arm64: mark reserved
memblock regions explicitly in iomem"), the current code will not be able
to identify the correct value of PHYS_OFFSET if some "reserved" memory
region, which is likely to be UEFI runtime services code/data, exists at
an address below the first "System RAM" regions.
This patch fixes this issue.
Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
---
kexec/arch/arm64/iomem.h | 7 +++++++
kexec/arch/arm64/kexec-arm64.c | 12 ++++++++++--
2 files changed, 17 insertions(+), 2 deletions(-)
create mode 100644 kexec/arch/arm64/iomem.h
diff --git a/kexec/arch/arm64/iomem.h b/kexec/arch/arm64/iomem.h
new file mode 100644
index 0000000..7fd66eb
--- /dev/null
+++ b/kexec/arch/arm64/iomem.h
@@ -0,0 +1,7 @@
+#ifndef IOMEM_H
+#define IOMEM_H
+
+#define SYSTEM_RAM "System RAM\n"
+#define IOMEM_RESERVED "reserved\n"
+
+#endif
diff --git a/kexec/arch/arm64/kexec-arm64.c b/kexec/arch/arm64/kexec-arm64.c
index 04fd396..d02b9da 100644
--- a/kexec/arch/arm64/kexec-arm64.c
+++ b/kexec/arch/arm64/kexec-arm64.c
@@ -21,6 +21,7 @@
#include "crashdump-arm64.h"
#include "dt-ops.h"
#include "fs2dt.h"
+#include "iomem.h"
#include "kexec-syscall.h"
#include "arch/options.h"
@@ -476,7 +477,14 @@ static int get_memory_ranges_iomem_cb(void *data, int nr, char *str,
return -1;
r = (struct memory_range *)data + nr;
- r->type = RANGE_RAM;
+
+ if (!strncmp(str, SYSTEM_RAM, strlen(SYSTEM_RAM)))
+ r->type = RANGE_RAM;
+ else if (!strncmp(str, IOMEM_RESERVED, strlen(IOMEM_RESERVED)))
+ r->type = RANGE_RESERVED;
+ else
+ return 1;
+
r->start = base;
r->end = base + length - 1;
@@ -495,7 +503,7 @@ static int get_memory_ranges_iomem_cb(void *data, int nr, char *str,
static int get_memory_ranges_iomem(struct memory_range *array,
unsigned int *count)
{
- *count = kexec_iomem_for_each_line("System RAM\n",
+ *count = kexec_iomem_for_each_line(NULL,
get_memory_ranges_iomem_cb, array);
if (!*count) {
--
2.11.0
