@@ -59,23 +59,6 @@ void machine_kexec_cleanup(struct kimage *kimage)
/* Empty routine needed to avoid build errors. */
}
-int machine_kexec_post_load(struct kimage *kimage)
-{
- void *reloc_code = page_to_virt(kimage->control_code_page);
-
- memcpy(reloc_code, arm64_relocate_new_kernel,
- arm64_relocate_new_kernel_size);
- kimage->arch.kern_reloc = __pa(reloc_code);
- kexec_image_info(kimage);
-
- /* Flush the reloc_code in preparation for its execution. */
- __flush_dcache_area(reloc_code, arm64_relocate_new_kernel_size);
- flush_icache_range((uintptr_t)reloc_code, (uintptr_t)reloc_code +
- arm64_relocate_new_kernel_size);
-
- return 0;
-}
-
/**
* machine_kexec_prepare - Prepare for a kexec reboot.
*
@@ -152,6 +135,29 @@ static void kexec_segment_flush(const struct kimage *kimage)
}
}
+int machine_kexec_post_load(struct kimage *kimage)
+{
+ void *reloc_code = page_to_virt(kimage->control_code_page);
+
+ /* If in place flush new kernel image, else flush lists and buffers */
+ if (kimage->head & IND_DONE)
+ kexec_segment_flush(kimage);
+ else
+ kexec_list_flush(kimage);
+
+ memcpy(reloc_code, arm64_relocate_new_kernel,
+ arm64_relocate_new_kernel_size);
+ kimage->arch.kern_reloc = __pa(reloc_code);
+ kexec_image_info(kimage);
+
+ /* Flush the reloc_code in preparation for its execution. */
+ __flush_dcache_area(reloc_code, arm64_relocate_new_kernel_size);
+ flush_icache_range((uintptr_t)reloc_code, (uintptr_t)reloc_code +
+ arm64_relocate_new_kernel_size);
+
+ return 0;
+}
+
/**
* machine_kexec - Do the kexec reboot.
*
@@ -169,13 +175,6 @@ void machine_kexec(struct kimage *kimage)
WARN(in_kexec_crash && (stuck_cpus || smp_crash_stop_failed()),
"Some CPUs may be stale, kdump will be unreliable.\n");
- /* Flush the kimage list and its buffers. */
- kexec_list_flush(kimage);
-
- /* Flush the new image if already in place. */
- if ((kimage != kexec_crash_image) && (kimage->head & IND_DONE))
- kexec_segment_flush(kimage);
-
pr_info("Bye!\n");
local_daif_mask();
@@ -250,8 +249,6 @@ void arch_kexec_protect_crashkres(void)
{
int i;
- kexec_segment_flush(kexec_crash_image);
-
for (i = 0; i < kexec_crash_image->nr_segments; i++)
set_memory_valid(
__phys_to_virt(kexec_crash_image->segment[i].mem),
Currently, during kexec load we are copying relocation function and flushing it. However, we can also flush kexec relocation buffers and if new kernel image is already in place (i.e. crash kernel), we can also flush the new kernel image itself. Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com> --- arch/arm64/kernel/machine_kexec.c | 49 +++++++++++++++---------------- 1 file changed, 23 insertions(+), 26 deletions(-)