[PATCH 3/3] x86/vdso: Add support for CLOCK_MONOTONIC_RAW in the vDSO

[Huw Davies]

This is particularly useful for Wine which needs to implement Win32
API clock functions whose values do not get adjusted by adjtimex().

Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Andy Lutomirski <l...@kernel.org>
Signed-off-by: Huw Davies <h...@codeweavers.com>
---
 arch/x86/entry/vsyscall/vsyscall_gtod.c | 6 ++++++
 arch/x86/include/asm/vgtod.h            | 3 ++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/x86/entry/vsyscall/vsyscall_gtod.c 
b/arch/x86/entry/vsyscall/vsyscall_gtod.c
index ddc6a71df87c..fe3458caf301 100644
--- a/arch/x86/entry/vsyscall/vsyscall_gtod.c
+++ b/arch/x86/entry/vsyscall/vsyscall_gtod.c
@@ -68,6 +68,12 @@ void update_vsyscall(struct timekeeper *tk)
        base->mult = tk->tkr_mono.mult;
        base->shift = tk->tkr_mono.shift;
 
+       base = &vdata->basetime[CLOCK_MONOTONIC_RAW];
+       base->sec = tk->raw_sec;
+       base->nsec = tk->tkr_raw.xtime_nsec;
+       base->mult = tk->tkr_raw.mult;
+       base->shift = tk->tkr_raw.shift;
+
        base = &vdata->basetime[CLOCK_REALTIME_COARSE];
        base->sec = tk->xtime_sec;
        base->nsec = tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift;
diff --git a/arch/x86/include/asm/vgtod.h b/arch/x86/include/asm/vgtod.h
index ae0d76491595..0b76ba884e25 100644
--- a/arch/x86/include/asm/vgtod.h
+++ b/arch/x86/include/asm/vgtod.h
@@ -30,7 +30,8 @@ struct vgtod_ts {
 };
 
 #define VGTOD_BASES    (CLOCK_TAI + 1)
-#define VGTOD_HRES     (BIT(CLOCK_REALTIME) | BIT(CLOCK_MONOTONIC) | 
BIT(CLOCK_TAI))
+#define VGTOD_HRES     (BIT(CLOCK_REALTIME) | BIT(CLOCK_MONOTONIC) | \
+                       BIT(CLOCK_MONOTONIC_RAW) | BIT(CLOCK_TAI))
 #define VGTOD_COARSE   (BIT(CLOCK_REALTIME_COARSE) | 
BIT(CLOCK_MONOTONIC_COARSE))
 
 /*
-- 
2.17.1