From: Heiko Carstens <hca@linux.ibm.com>
Date: Sun, 7 Feb 2021 21:00:22 +0000 (+0100)
Subject: s390/time: introduce union tod_clock
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e4101be56c85effa4509b35a208482f888e79cfc;p=linux.git

s390/time: introduce union tod_clock

Introduce union tod_clock which is supposed to be used to decode and
access various fields of the result of STORE CLOCK EXTENDED.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---

diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h
index 63bf3bd6e83fc..271a1e12cc73b 100644
--- a/arch/s390/include/asm/timex.h
+++ b/arch/s390/include/asm/timex.h
@@ -21,6 +21,25 @@
 
 extern u64 clock_comparator_max;
 
+union tod_clock {
+	__uint128_t val;
+	struct {
+		__uint128_t ei	:  8; /* epoch index */
+		__uint128_t tod : 64; /* bits 0-63 of tod clock */
+		__uint128_t	: 40;
+		__uint128_t pf	: 16; /* programmable field */
+	};
+	struct {
+		__uint128_t eitod : 72; /* epoch index + bits 0-63 tod clock */
+		__uint128_t	  : 56;
+	};
+	struct {
+		__uint128_t us	: 60; /* micro-seconds */
+		__uint128_t sus	: 12; /* sub-microseconds */
+		__uint128_t	: 56;
+	};
+} __packed;
+
 /* Inline functions for clock register access. */
 static inline int set_tod_clock(__u64 time)
 {