lkml.org 
[lkml]   [2020]   [Mar]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/5] x86/vmware: Remove vmware_sched_clock_setup()
Date
Move cyc2ns setup logic to separate function.
This separation will allow to use cyc2ns mult/shift pair
not only for the sched_clock but also for other clocks
such as steal_clock.

Signed-off-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
---
arch/x86/kernel/cpu/vmware.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c
index d280560fd75e..efb22fa76ba4 100644
--- a/arch/x86/kernel/cpu/vmware.c
+++ b/arch/x86/kernel/cpu/vmware.c
@@ -122,7 +122,7 @@ static unsigned long long notrace vmware_sched_clock(void)
return ns;
}

-static void __init vmware_sched_clock_setup(void)
+static void __init vmware_cyc2ns_setup(void)
{
struct cyc2ns_data *d = &vmware_cyc2ns;
unsigned long long tsc_now = rdtsc();
@@ -132,8 +132,7 @@ static void __init vmware_sched_clock_setup(void)
d->cyc2ns_offset = mul_u64_u32_shr(tsc_now, d->cyc2ns_mul,
d->cyc2ns_shift);

- pv_ops.time.sched_clock = vmware_sched_clock;
- pr_info("using sched offset of %llu ns\n", d->cyc2ns_offset);
+ pr_info("using clock offset of %llu ns\n", d->cyc2ns_offset);
}

static void __init vmware_paravirt_ops_setup(void)
@@ -141,8 +140,14 @@ static void __init vmware_paravirt_ops_setup(void)
pv_info.name = "VMware hypervisor";
pv_ops.cpu.io_delay = paravirt_nop;

- if (vmware_tsc_khz && vmw_sched_clock)
- vmware_sched_clock_setup();
+ if (vmware_tsc_khz == 0)
+ return;
+
+ vmware_cyc2ns_setup();
+
+ if (vmw_sched_clock)
+ pv_ops.time.sched_clock = vmware_sched_clock;
+
}
#else
#define vmware_paravirt_ops_setup() do {} while (0)
--
2.14.2
\
 
 \ /
  Last update: 2020-03-20 21:51    [W:0.075 / U:0.280 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site