diff options
| author | Michael Kelley <mikelley@microsoft.com> | 2021-07-14 02:01:46 +0200 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2021-07-19 11:24:28 +0200 |
| commit | 31e5e64694cf9879e63b2802007fa934f4131126 (patch) | |
| tree | d2efd0afb5e7073fd3c47f1d663126a9c57705a3 /drivers/clocksource | |
| parent | x86/hyperv: add comment describing TSC_INVARIANT_CONTROL MSR setting bit 0 (diff) | |
| download | linux-31e5e64694cf9879e63b2802007fa934f4131126.tar.xz linux-31e5e64694cf9879e63b2802007fa934f4131126.zip | |
drivers: hv: Decouple Hyper-V clock/timer code from VMbus drivers
Hyper-V clock/timer code in hyperv_timer.c is mostly independent from
other VMbus drivers, but building for ARM64 without hyperv_timer.c
shows some remaining entanglements. A default implementation of
hv_read_reference_counter can just read a Hyper-V synthetic register
and be independent of hyperv_timer.c, so move this code out and into
hv_common.c. Then it can be used by the timesync driver even if
hyperv_timer.c isn't built on a particular architecture. If
hyperv_timer.c *is* built, it can override with a faster implementation.
Also provide stubs for stimer functions called by the VMbus driver when
hyperv_timer.c isn't built.
No functional changes.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1626220906-22629-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/hyperv_timer.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c index d6ece7bbce89..ff188ab68496 100644 --- a/drivers/clocksource/hyperv_timer.c +++ b/drivers/clocksource/hyperv_timer.c @@ -361,9 +361,6 @@ EXPORT_SYMBOL_GPL(hv_stimer_global_cleanup); * Hyper-V and 32-bit x86. The TSC reference page version is preferred. */ -u64 (*hv_read_reference_counter)(void); -EXPORT_SYMBOL_GPL(hv_read_reference_counter); - static union { struct ms_hyperv_tsc_page page; u8 reserved[PAGE_SIZE]; |