[kvm-unit-tests PATCH v3 1/6] s390x: snippets: Add reset_guest() to lib

[Christoph Schlameuss <schlameuss@linux.ibm.com>]

From: Nina Schoetterl-Glausch <nsg@linux.ibm.com>

Extract reset_guest from spec_ex-sie into the lib.
After reset_guest() the snippet can be executed again.

Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Nico Boehr <nrb@linux.ibm.com>
---
 lib/s390x/snippet.h |  6 ++++++
 s390x/spec_ex-sie.c | 10 ++--------
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/lib/s390x/snippet.h b/lib/s390x/snippet.h
index 910849aa186c..6f611de510d8 100644
--- a/lib/s390x/snippet.h
+++ b/lib/s390x/snippet.h
@@ -83,6 +83,12 @@ static inline void snippet_init(struct vm *vm, const char *gbin,
 	vm->sblk->ictl = ICTL_OPEREXC | ICTL_PINT;
 }
 
+static inline void reset_guest(struct vm *vm)
+{
+	vm->sblk->gpsw = snippet_psw;
+	vm->sblk->icptcode = 0;
+}
+
 /*
  * Sets up a snippet UV/PV guest on top of an existing and initialized
  * SIE vm struct.
diff --git a/s390x/spec_ex-sie.c b/s390x/spec_ex-sie.c
index fe2f23ee3d84..75625ecffc4a 100644
--- a/s390x/spec_ex-sie.c
+++ b/s390x/spec_ex-sie.c
@@ -31,12 +31,6 @@ static void setup_guest(void)
 		     SNIPPET_LEN(c, spec_ex), SNIPPET_UNPACK_OFF);
 }
 
-static void reset_guest(void)
-{
-	vm.sblk->gpsw = snippet_psw;
-	vm.sblk->icptcode = 0;
-}
-
 static void test_spec_ex_sie(void)
 {
 	const char *msg;
@@ -45,7 +39,7 @@ static void test_spec_ex_sie(void)
 
 	report_prefix_push("SIE spec ex interpretation");
 	report_prefix_push("off");
-	reset_guest();
+	reset_guest(&vm);
 	sie(&vm);
 	/* interpretation off -> initial exception must cause interception */
 	report(vm.sblk->icptcode == ICPT_PROGI
@@ -56,7 +50,7 @@ static void test_spec_ex_sie(void)
 
 	report_prefix_push("on");
 	vm.sblk->ecb |= ECB_SPECI;
-	reset_guest();
+	reset_guest(&vm);
 	sie(&vm);
 	/* interpretation on -> configuration dependent if initial exception causes
 	 * interception, but invalid new program PSW must

-- 
2.53.0