s390/vmcoreinfo: Store virtual memory layout

This is a preparatory rework to allow uncoupling virtual
and physical addresses spaces.

The virtual memory layout is needed for address translation
by crash tool when /proc/kcore device is used as the memory
image.

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

Author: Alexander Gordeev

arch/s390/kernel/vmcore_info.c

@@ -14,7 +14,9 @@ void arch_crash_save_vmcoreinfo(void)
 	VMCOREINFO_LENGTH(lowcore_ptr, NR_CPUS);
 	vmcoreinfo_append_str("SAMODE31=%lx\n", (unsigned long)__samode31);
 	vmcoreinfo_append_str("EAMODE31=%lx\n", (unsigned long)__eamode31);
+	vmcoreinfo_append_str("IDENTITYBASE=%lx\n", __identity_base);
 	vmcoreinfo_append_str("KERNELOFFSET=%lx\n", kaslr_offset());
+	vmcoreinfo_append_str("KERNELOFFPHYS=%lx\n", __kaslr_offset_phys);
 	abs_lc = get_abs_lowcore();
 	abs_lc->vmcore_info = paddr_vmcoreinfo_note();
 	put_abs_lowcore(abs_lc);