[kvm-unit-tests PATCH v5 5/7] s390x: lib: add teid union and clear teid from lowcore
From: Claudio Imbrenda <imbrenda@linux.ibm.com>
Date: 2021-06-11 14:07:17
Also in:
linux-s390
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
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> --- 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