Add resources with specific flags to PT_LOADs of the elfcorehdr so that these resources can be dumpable. This change is for kexec_file_load(2) while kexec_load(2) setups the PT_LOADs according to its parameters by the callers which usually rely on resources' name from /proc/iomem CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CC: Ingo Molnar <mingo@xxxxxxxxxx> CC: Borislav Petkov <bp@xxxxxxxxx> CC: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> CC: Baoquan He <bhe@xxxxxxxxxx> CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> CC: "H. Peter Anvin" <hpa@xxxxxxxxx> CC: x86@xxxxxxxxxx Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx> --- arch/x86/kernel/crash.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c index b6b044356f1b..b8426fedd2cd 100644 --- a/arch/x86/kernel/crash.c +++ b/arch/x86/kernel/crash.c @@ -146,6 +146,8 @@ static struct crash_mem *fill_up_crash_elf_data(void) if (!nr_ranges) return NULL; + walk_device_backed_vmemmap_res(0, -1, &nr_ranges, + get_nr_ram_ranges_callback); /* * Exclusion of crash region and/or crashk_low_res may cause * another range split. So add extra two slots here. @@ -212,6 +214,9 @@ static int prepare_elf_headers(void **addr, unsigned long *sz, if (ret) goto out; + walk_device_backed_vmemmap_res(0, -1, cmem, + prepare_elf64_ram_headers_callback); + /* Exclude unwanted mem ranges */ ret = elf_header_exclude_ranges(cmem); if (ret) -- 2.29.2
