Sometimes we need to do cleanup which we don't necessarily want to add
to interrupt.c, so let's add a way to register a cleanup function.
Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
Reviewed-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
Message-Id: <20200807111555.11169-2-frankja@xxxxxxxxxxxxx>
Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
---
lib/s390x/asm/interrupt.h | 1 +
lib/s390x/interrupt.c | 12 +++++++++++-
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/lib/s390x/asm/interrupt.h b/lib/s390x/asm/interrupt.h
index 4cfade9..2772e6b 100644
--- a/lib/s390x/asm/interrupt.h
+++ b/lib/s390x/asm/interrupt.h
@@ -15,6 +15,7 @@
#define EXT_IRQ_EXTERNAL_CALL 0x1202
#define EXT_IRQ_SERVICE_SIG 0x2401
+void register_pgm_cleanup_func(void (*f)(void));
void handle_pgm_int(void);
void handle_ext_int(void);
void handle_mcck_int(void);
diff --git a/lib/s390x/interrupt.c b/lib/s390x/interrupt.c
index 243b9c2..a074505 100644
--- a/lib/s390x/interrupt.c
+++ b/lib/s390x/interrupt.c
@@ -16,6 +16,7 @@
static bool pgm_int_expected;
static bool ext_int_expected;
+static void (*pgm_cleanup_func)(void);
static struct lowcore *lc;
void expect_pgm_int(void)
@@ -51,6 +52,11 @@ void check_pgm_int_code(uint16_t code)
lc->pgm_int_code);
}
+void register_pgm_cleanup_func(void (*f)(void))
+{
+ pgm_cleanup_func = f;
+}
+
static void fixup_pgm_int(void)
{
switch (lc->pgm_int_code) {
@@ -115,7 +121,11 @@ void handle_pgm_int(void)
}
pgm_int_expected = false;
- fixup_pgm_int();
+
+ if (pgm_cleanup_func)
+ (*pgm_cleanup_func)();
+ else
+ fixup_pgm_int();
}
void handle_ext_int(void)
--
2.25.4
