Commit 221f2c77 authored by Geoff Levand's avatar Geoff Levand Committed by Catalin Marinas

arm64/kexec: Add pr_debug output

To aid in debugging kexec problems or when adding new functionality to
kexec add a new routine kexec_image_info() and several inline pr_debug
statements.
Signed-off-by: default avatarGeoff Levand <geoff@infradead.org>
Reviewed-by: default avatarJames Morse <james.morse@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent b26a4ae3
...@@ -24,6 +24,32 @@ extern const unsigned long arm64_relocate_new_kernel_size; ...@@ -24,6 +24,32 @@ extern const unsigned long arm64_relocate_new_kernel_size;
static unsigned long kimage_start; static unsigned long kimage_start;
/**
* kexec_image_info - For debugging output.
*/
#define kexec_image_info(_i) _kexec_image_info(__func__, __LINE__, _i)
static void _kexec_image_info(const char *func, int line,
const struct kimage *kimage)
{
unsigned long i;
pr_debug("%s:%d:\n", func, line);
pr_debug(" kexec kimage info:\n");
pr_debug(" type: %d\n", kimage->type);
pr_debug(" start: %lx\n", kimage->start);
pr_debug(" head: %lx\n", kimage->head);
pr_debug(" nr_segments: %lu\n", kimage->nr_segments);
for (i = 0; i < kimage->nr_segments; i++) {
pr_debug(" segment[%lu]: %016lx - %016lx, 0x%lx bytes, %lu pages\n",
i,
kimage->segment[i].mem,
kimage->segment[i].mem + kimage->segment[i].memsz,
kimage->segment[i].memsz,
kimage->segment[i].memsz / PAGE_SIZE);
}
}
void machine_kexec_cleanup(struct kimage *kimage) void machine_kexec_cleanup(struct kimage *kimage)
{ {
/* Empty routine needed to avoid build errors. */ /* Empty routine needed to avoid build errors. */
...@@ -40,6 +66,8 @@ int machine_kexec_prepare(struct kimage *kimage) ...@@ -40,6 +66,8 @@ int machine_kexec_prepare(struct kimage *kimage)
{ {
kimage_start = kimage->start; kimage_start = kimage->start;
kexec_image_info(kimage);
if (kimage->type != KEXEC_TYPE_CRASH && cpus_are_stuck_in_kernel()) { if (kimage->type != KEXEC_TYPE_CRASH && cpus_are_stuck_in_kernel()) {
pr_err("Can't kexec: CPUs are stuck in the kernel.\n"); pr_err("Can't kexec: CPUs are stuck in the kernel.\n");
return -EBUSY; return -EBUSY;
...@@ -125,6 +153,20 @@ void machine_kexec(struct kimage *kimage) ...@@ -125,6 +153,20 @@ void machine_kexec(struct kimage *kimage)
reboot_code_buffer_phys = page_to_phys(kimage->control_code_page); reboot_code_buffer_phys = page_to_phys(kimage->control_code_page);
reboot_code_buffer = phys_to_virt(reboot_code_buffer_phys); reboot_code_buffer = phys_to_virt(reboot_code_buffer_phys);
kexec_image_info(kimage);
pr_debug("%s:%d: control_code_page: %p\n", __func__, __LINE__,
kimage->control_code_page);
pr_debug("%s:%d: reboot_code_buffer_phys: %pa\n", __func__, __LINE__,
&reboot_code_buffer_phys);
pr_debug("%s:%d: reboot_code_buffer: %p\n", __func__, __LINE__,
reboot_code_buffer);
pr_debug("%s:%d: relocate_new_kernel: %p\n", __func__, __LINE__,
arm64_relocate_new_kernel);
pr_debug("%s:%d: relocate_new_kernel_size: 0x%lx(%lu) bytes\n",
__func__, __LINE__, arm64_relocate_new_kernel_size,
arm64_relocate_new_kernel_size);
/* /*
* Copy arm64_relocate_new_kernel to the reboot_code_buffer for use * Copy arm64_relocate_new_kernel to the reboot_code_buffer for use
* after the kernel is shut down. * after the kernel is shut down.
......
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