[kvm-unit-tests GIT PULL 06/18] s390x: Add sie_is_pv

[Nico Boehr <nrb@linux.ibm.com>]

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

Add a function to check if a guest VM is currently running protected.

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Link: https://lore.kernel.org/r/20241016180320.686132-3-nsg@linux.ibm.com
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
---
 lib/s390x/sie.h | 6 ++++++
 lib/s390x/sie.c | 4 ++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/s390x/sie.h b/lib/s390x/sie.h
index c1724cf2..53cd767f 100644
--- a/lib/s390x/sie.h
+++ b/lib/s390x/sie.h
@@ -281,6 +281,12 @@ void sie_expect_validity(struct vm *vm);
 uint16_t sie_get_validity(struct vm *vm);
 void sie_check_validity(struct vm *vm, uint16_t vir_exp);
 void sie_handle_validity(struct vm *vm);
+
+static inline bool sie_is_pv(struct vm *vm)
+{
+	return vm->sblk->sdf == 2;
+}
+
 void sie_guest_sca_create(struct vm *vm);
 void sie_guest_create(struct vm *vm, uint64_t guest_mem, uint64_t guest_mem_len);
 void sie_guest_destroy(struct vm *vm);
diff --git a/lib/s390x/sie.c b/lib/s390x/sie.c
index 40936bd2..0fa915cf 100644
--- a/lib/s390x/sie.c
+++ b/lib/s390x/sie.c
@@ -59,7 +59,7 @@ void sie(struct vm *vm)
 	/* When a pgm int code is set, we'll never enter SIE below. */
 	assert(!read_pgm_int_code());
 
-	if (vm->sblk->sdf == 2)
+	if (sie_is_pv(vm))
 		memcpy(vm->sblk->pv_grregs, vm->save_area.guest.grs,
 		       sizeof(vm->save_area.guest.grs));
 
@@ -98,7 +98,7 @@ void sie(struct vm *vm)
 	/* restore the old CR 13 */
 	lctlg(13, old_cr13);
 
-	if (vm->sblk->sdf == 2)
+	if (sie_is_pv(vm))
 		memcpy(vm->save_area.guest.grs, vm->sblk->pv_grregs,
 		       sizeof(vm->save_area.guest.grs));
 }
-- 
2.47.1