diff --git a/arch/powerpc/include/asm/fadump-internal.h b/arch/powerpc/include/asm/fadump-internal.h
index 81bcb9abb371..27f9e11eda28 100644
--- a/arch/powerpc/include/asm/fadump-internal.h
+++ b/arch/powerpc/include/asm/fadump-internal.h
@@ -50,7 +50,7 @@ struct fadump_crash_info_header {
 	u64		elfcorehdr_addr;
 	u32		crashing_cpu;
 	struct pt_regs	regs;
-	struct cpumask	online_mask;
+	struct cpumask	cpu_mask;
 };
 
 struct fadump_memory_range {
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 65562c4a0a69..8343c0b14277 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -728,7 +728,7 @@ void crash_fadump(struct pt_regs *regs, const char *str)
 	else
 		ppc_save_regs(&fdh->regs);
 
-	fdh->online_mask = *cpu_online_mask;
+	fdh->cpu_mask = *cpu_online_mask;
 
 	/*
 	 * If we came in via system reset, wait a while for the secondary
@@ -1164,6 +1164,11 @@ static unsigned long init_fadump_header(unsigned long addr)
 	fdh->elfcorehdr_addr = addr;
 	/* We will set the crashing cpu id in crash_fadump() during crash. */
 	fdh->crashing_cpu = FADUMP_CPU_UNKNOWN;
+	/*
+	 * When LPAR is terminated by PYHP, ensure all possible CPUs'
+	 * register data is processed while exporting the vmcore.
+	 */
+	fdh->cpu_mask = *cpu_possible_mask;
 
 	return addr;
 }
diff --git a/arch/powerpc/platforms/pseries/rtas-fadump.c b/arch/powerpc/platforms/pseries/rtas-fadump.c
index 35f9cb602c30..617c0f3b1f4f 100644
--- a/arch/powerpc/platforms/pseries/rtas-fadump.c
+++ b/arch/powerpc/platforms/pseries/rtas-fadump.c
@@ -351,7 +351,7 @@ static int __init rtas_fadump_build_cpu_notes(struct fw_dump *fadump_conf)
 		/* Lower 4 bytes of reg_value contains logical cpu id */
 		cpu = (be64_to_cpu(reg_entry->reg_value) &
 		       RTAS_FADUMP_CPU_ID_MASK);
-		if (fdh && !cpumask_test_cpu(cpu, &fdh->online_mask)) {
+		if (fdh && !cpumask_test_cpu(cpu, &fdh->cpu_mask)) {
 			RTAS_FADUMP_SKIP_TO_NEXT_CPU(reg_entry);
 			continue;
 		}