[kvm-unit-tests GIT PULL 10/12] s390x: lib: add teid union and clear teid from lowcore

Janosch Frank
2021-06-22T08:21:51Z

Add a union to represent Translation-Exception Identification (TEID).

Clear the TEID in expect_pgm_int clear_pgm_int.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Message-Id: <20210611140705.553307-6-imbrenda@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
---
lib/s390x/asm/interrupt.h | 24 ++++++++++++++++++++++++
lib/s390x/interrupt.c | 2 ++
2 files changed, 26 insertions(+)

diff --git a/lib/s390x/asm/interrupt.h b/lib/s390x/asm/interrupt.h
index bf0eb40d..d9ab0bd7 100644
--- a/lib/s390x/asm/interrupt.h
+++ b/lib/s390x/asm/interrupt.h
@@ -13,6 +13,30 @@
#define EXT_IRQ_EXTERNAL_CALL 0x1202
#define EXT_IRQ_SERVICE_SIG 0x2401

+#define TEID_ASCE_PRIMARY 0
+#define TEID_ASCE_AR 1
+#define TEID_ASCE_SECONDARY 2
+#define TEID_ASCE_HOME 3
+
+union teid {
+ unsigned long val;
+ struct {
+ unsigned long addr:52;
+ unsigned long fetch:1;
+ unsigned long store:1;
+ unsigned long reserved:6;
+ unsigned long acc_list_prot:1;
+ /*
+ * depending on the exception and the installed facilities,
+ * the m field can indicate several different things,
+ * including whether the exception was triggered by a MVPG
+ * instruction, or whether the addr field is meaningful
+ */
+ unsigned long m:1;
+ unsigned long asce_id:2;
+ };
+};
+
void register_pgm_cleanup_func(void (*f)(void));
void handle_pgm_int(struct stack_frame_int *stack);
void handle_ext_int(struct stack_frame_int *stack);
diff --git a/lib/s390x/interrupt.c b/lib/s390x/interrupt.c
index ce0003de..b627942f 100644
--- a/lib/s390x/interrupt.c
+++ b/lib/s390x/interrupt.c
@@ -22,6 +22,7 @@ void expect_pgm_int(void)
{
pgm_int_expected = true;
lc->pgm_int_code = 0;
+ lc->trans_exc_id = 0;
mb();
}

@@ -39,6 +40,7 @@ uint16_t clear_pgm_int(void)
mb();
code = lc->pgm_int_code;
lc->pgm_int_code = 0;
+ lc->trans_exc_id = 0;
pgm_int_expected = false;
return code;
}
--
2.31.1