[kvm-unit-tests PATCH v2 3/4] s390x: use migrate_once() in migration tests

[Nico Boehr <nrb@xxxxxxxxxxxxx>]

migrate_once() can simplify the control flow in migration-skey and
migration-cmm.

Signed-off-by: Nico Boehr <nrb@xxxxxxxxxxxxx>
---
 s390x/Makefile         |  1 +
 s390x/migration-cmm.c  | 25 ++++++++-----------------
 s390x/migration-sck.c  |  4 ++--
 s390x/migration-skey.c | 15 +++++----------
 s390x/migration.c      |  7 ++-----
 5 files changed, 18 insertions(+), 34 deletions(-)

diff --git a/s390x/Makefile b/s390x/Makefile
index bf1504f9d58c..52a9d821974e 100644
--- a/s390x/Makefile
+++ b/s390x/Makefile
@@ -85,6 +85,7 @@ cflatobjs += lib/alloc_page.o
 cflatobjs += lib/vmalloc.o
 cflatobjs += lib/alloc_phys.o
 cflatobjs += lib/getchar.o
+cflatobjs += lib/migrate.o
 cflatobjs += lib/s390x/io.o
 cflatobjs += lib/s390x/stack.o
 cflatobjs += lib/s390x/sclp.o
diff --git a/s390x/migration-cmm.c b/s390x/migration-cmm.c
index aa7910ca76bf..eef45f5f8fb7 100644
--- a/s390x/migration-cmm.c
+++ b/s390x/migration-cmm.c
@@ -9,6 +9,7 @@
  */
 
 #include <libcflat.h>
+#include <migrate.h>
 #include <asm/interrupt.h>
 #include <asm/page.h>
 #include <asm/cmm.h>
@@ -39,8 +40,7 @@ static void test_migration(void)
 		essa(ESSA_SET_POT_VOLATILE, (unsigned long)pagebuf[i + 3]);
 	}
 
-	puts("Please migrate me, then press return\n");
-	(void)getchar();
+	migrate_once();
 
 	for (i = 0; i < NUM_PAGES; i++) {
 		actual_state = essa(ESSA_GET_STATE, (unsigned long)pagebuf[i]);
@@ -53,25 +53,16 @@ static void test_migration(void)
 
 int main(void)
 {
-	bool has_essa = check_essa_available();
-
 	report_prefix_push("migration-cmm");
-	if (!has_essa) {
-		report_skip("ESSA is not available");
-
-		/*
-		 * If we just exit and don't ask migrate_cmd to migrate us, it
-		 * will just hang forever. Hence, also ask for migration when we
-		 * skip this test alltogether.
-		 */
-		puts("Please migrate me, then press return\n");
-		(void)getchar();
 
-		goto done;
+	if (!check_essa_available()) {
+		report_skip("ESSA is not available");
+	} else {
+		test_migration();
 	}
 
-	test_migration();
-done:
+	migrate_once();
+
 	report_prefix_pop();
 	return report_summary();
 }
diff --git a/s390x/migration-sck.c b/s390x/migration-sck.c
index 2d9a195ab4c4..2a9c87071643 100644
--- a/s390x/migration-sck.c
+++ b/s390x/migration-sck.c
@@ -9,6 +9,7 @@
  */
 
 #include <libcflat.h>
+#include <migrate.h>
 #include <asm/time.h>
 
 static void test_sck_migration(void)
@@ -30,8 +31,7 @@ static void test_sck_migration(void)
 	report(!cc, "clock running after set");
 	report(now_after_set >= time_to_set, "TOD clock value is larger than what has been set");
 
-	puts("Please migrate me, then press return\n");
-	(void)getchar();
+	migrate_once();
 
 	cc = stckf(&now_after_migration);
 	report(!cc, "clock still set");
diff --git a/s390x/migration-skey.c b/s390x/migration-skey.c
index b7bd82581abe..438a4be95702 100644
--- a/s390x/migration-skey.c
+++ b/s390x/migration-skey.c
@@ -9,6 +9,7 @@
  */
 
 #include <libcflat.h>
+#include <migrate.h>
 #include <asm/facility.h>
 #include <asm/page.h>
 #include <asm/mem.h>
@@ -35,8 +36,7 @@ static void test_migration(void)
 		set_storage_key(pagebuf[i], key_to_set, 1);
 	}
 
-	puts("Please migrate me, then press return\n");
-	(void)getchar();
+	migrate_once();
 
 	for (i = 0; i < NUM_PAGES; i++) {
 		actual_key.val = get_storage_key(pagebuf[i]);
@@ -64,20 +64,15 @@ static void test_migration(void)
 int main(void)
 {
 	report_prefix_push("migration-skey");
+
 	if (test_facility(169)) {
 		report_skip("storage key removal facility is active");
-
-		/*
-		 * If we just exit and don't ask migrate_cmd to migrate us, it
-		 * will just hang forever. Hence, also ask for migration when we
-		 * skip this test altogether.
-		 */
-		puts("Please migrate me, then press return\n");
-		(void)getchar();
 	} else {
 		test_migration();
 	}
 
+	migrate_once();
+
 	report_prefix_pop();
 	return report_summary();
 }
diff --git a/s390x/migration.c b/s390x/migration.c
index a45296374cd8..fe6ea8369edb 100644
--- a/s390x/migration.c
+++ b/s390x/migration.c
@@ -8,6 +8,7 @@
  *  Nico Boehr <nrb@xxxxxxxxxxxxx>
  */
 #include <libcflat.h>
+#include <migrate.h>
 #include <asm/arch_def.h>
 #include <asm/vector.h>
 #include <asm/barrier.h>
@@ -178,11 +179,7 @@ int main(void)
 		mb();
 	flag_thread_complete = 0;
 
-	/* ask migrate_cmd to migrate (it listens for 'migrate') */
-	puts("Please migrate me, then press return\n");
-
-	/* wait for migration to finish, we will read a newline */
-	(void)getchar();
+	migrate_once();
 
 	flag_migration_complete = 1;
 
-- 
2.36.1