From: Hikaru Nishida <hikalium@chromium.org>
To: linux-kernel@vger.kernel.org, dme@dme.org, tglx@linutronix.de,
mlevitsk@redhat.com, linux@roeck-us.net, pbonzini@redhat.com,
vkuznets@redhat.com, maz@kernel.org, will@kernel.org
Cc: suleiman@google.com, senozhatsky@google.com,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org,
Hikaru Nishida <hikalium@chromium.org>,
Arnd Bergmann <arnd@arndb.de>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Ingo Molnar <mingo@kernel.org>,
John Stultz <john.stultz@linaro.org>,
Linus Walleij <linus.walleij@linaro.org>,
Stephen Boyd <sboyd@kernel.org>
Subject: [RFC PATCH v3 1/5] timekeeping: Expose tk->offs_boot via ktime_get_offs_boot_ns
Date: Wed, 20 Oct 2021 21:04:26 +0900 [thread overview]
Message-ID: <20211020210348.RFC.v3.1.Ic2211981441d0504581923b8770809f0750a4d0d@changeid> (raw)
In-Reply-To: <20211020120431.776494-1-hikalium@chromium.org>
Expose tk->offs_boot to be used in kvm virtual suspend injection.
Signed-off-by: Hikaru Nishida <hikalium@chromium.org>
---
Changes in v3:
- Added this patch.
include/linux/timekeeping.h | 2 ++
kernel/time/timekeeping.c | 10 ++++++++++
2 files changed, 12 insertions(+)
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 78a98bdff76d..f7be69c81dab 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -179,6 +179,8 @@ extern u64 ktime_get_raw_fast_ns(void);
extern u64 ktime_get_boot_fast_ns(void);
extern u64 ktime_get_real_fast_ns(void);
+extern u64 ktime_get_offs_boot_ns(void);
+
/*
* timespec64/time64_t interfaces utilizing the ktime based ones
* for API completeness, these could be implemented more efficiently
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index b348749a9fc6..e77580d9f8c1 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -565,6 +565,16 @@ u64 ktime_get_real_fast_ns(void)
}
EXPORT_SYMBOL_GPL(ktime_get_real_fast_ns);
+/**
+ * ktime_get_offs_boot_ns - boottime offset to monotonic.
+ * Return: boottime offset in nanoseconds.
+ */
+u64 ktime_get_offs_boot_ns(void)
+{
+ return ktime_to_ns(tk_core.timekeeper.offs_boot);
+}
+EXPORT_SYMBOL_GPL(ktime_get_offs_boot_ns);
+
/**
* ktime_get_fast_timestamps: - NMI safe timestamps
* @snapshot: Pointer to timestamp storage
--
2.33.0.1079.g6e70778dc9-goog
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next prev parent reply other threads:[~2021-10-20 12:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-20 12:04 [RFC PATCH v3 0/5] x86/kvm: Virtual suspend time injection support Hikaru Nishida
2021-10-20 12:04 ` Hikaru Nishida [this message]
2021-10-20 12:04 ` [RFC PATCH v3 2/5] kvm/x86: Include asm/pvclock.h in asm/kvmclock.h Hikaru Nishida
2021-10-20 12:04 ` [RFC PATCH v3 3/5] kvm/x86: virtual suspend time injection: Add common definitions Hikaru Nishida
2021-10-20 12:04 ` [RFC PATCH v3 4/5] kvm/x86: virtual suspend time injection: Implement host side Hikaru Nishida
2021-10-20 12:04 ` [RFC PATCH v3 5/5] kvm/x86: virtual suspend time injection: Implement guest side Hikaru Nishida
2021-10-20 13:52 ` [RFC PATCH v3 0/5] x86/kvm: Virtual suspend time injection support Marc Zyngier
2021-11-04 9:10 ` Hikaru Nishida
2021-12-04 17:30 ` Marc Zyngier
2022-04-06 3:48 ` Hikaru Nishida
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