* [PATCH v2] X86/VPMU:clear the overflow status of which counter happened overflow
@ 2016-12-13 2:49 Luwei Kang
2016-12-13 5:14 ` Tian, Kevin
0 siblings, 1 reply; 3+ messages in thread
From: Luwei Kang @ 2016-12-13 2:49 UTC (permalink / raw)
To: xen-devel; +Cc: andrew.cooper3, kevin.tian, Luwei Kang, jun.nakajima, jbeulich
just set the corresponding bits of which counter happened overflow,
rather than set all the available bits of IA32_PERF_GLOBAL_OVF_CTRL
when happened pmu interrupt.
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
---
v2:modify the description of this patch.
---
xen/arch/x86/cpu/vpmu_intel.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/arch/x86/cpu/vpmu_intel.c b/xen/arch/x86/cpu/vpmu_intel.c
index e8049ed..613aafe 100644
--- a/xen/arch/x86/cpu/vpmu_intel.c
+++ b/xen/arch/x86/cpu/vpmu_intel.c
@@ -868,7 +868,7 @@ static int core2_vpmu_do_interrupt(struct cpu_user_regs *regs)
if ( is_pmc_quirk )
handle_pmc_quirk(msr_content);
core2_vpmu_cxt->global_status |= msr_content;
- msr_content = ~global_ovf_ctrl_mask;
+ msr_content &= ~global_ovf_ctrl_mask;
wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, msr_content);
}
else
--
2.7.4
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^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2] X86/VPMU:clear the overflow status of which counter happened overflow
2016-12-13 2:49 [PATCH v2] X86/VPMU:clear the overflow status of which counter happened overflow Luwei Kang
@ 2016-12-13 5:14 ` Tian, Kevin
2016-12-13 5:48 ` Kang, Luwei
0 siblings, 1 reply; 3+ messages in thread
From: Tian, Kevin @ 2016-12-13 5:14 UTC (permalink / raw)
To: Kang, Luwei, xen-devel; +Cc: andrew.cooper3, Nakajima, Jun, jbeulich
> From: Kang, Luwei
> Sent: Tuesday, December 13, 2016 10:50 AM
>
> just set the corresponding bits of which counter happened overflow,
> rather than set all the available bits of IA32_PERF_GLOBAL_OVF_CTRL
> when happened pmu interrupt.
"when pmu interrupt happens"
>
> Signed-off-by: Luwei Kang <luwei.kang@intel.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] X86/VPMU:clear the overflow status of which counter happened overflow
2016-12-13 5:14 ` Tian, Kevin
@ 2016-12-13 5:48 ` Kang, Luwei
0 siblings, 0 replies; 3+ messages in thread
From: Kang, Luwei @ 2016-12-13 5:48 UTC (permalink / raw)
To: Tian, Kevin, xen-devel; +Cc: andrew.cooper3, Nakajima, Jun, jbeulich
> > From: Kang, Luwei
> > Sent: Tuesday, December 13, 2016 10:50 AM
> >
> > just set the corresponding bits of which counter happened overflow,
> > rather than set all the available bits of IA32_PERF_GLOBAL_OVF_CTRL
> > when happened pmu interrupt.
>
> "when pmu interrupt happens"
>
When a counter happens overflow.
> >
> > Signed-off-by: Luwei Kang <luwei.kang@intel.com>
>
> Acked-by: Kevin Tian <kevin.tian@intel.com>
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-12-13 2:49 [PATCH v2] X86/VPMU:clear the overflow status of which counter happened overflow Luwei Kang
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