From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: suravee.suthikulpanit@amd.com, George.Dunlap@eu.citrix.com,
jacob.shin@amd.com, eddie.dong@intel.com,
dietmar.hahn@ts.fujitsu.com, jun.nakajima@intel.com,
xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH v2 11/13] x86/PMU: Handle PMU interrupts for PV guests
Date: Wed, 25 Sep 2013 11:19:46 -0400 [thread overview]
Message-ID: <5242FF12.9090809@oracle.com> (raw)
In-Reply-To: <5243106702000078000F6524@nat28.tlf.novell.com>
On 09/25/2013 10:33 AM, Jan Beulich wrote:
>>>> On 20.09.13 at 11:42, Boris Ostrovsky <boris.ostrovsky@oracle.com> wrote:
>> Add support for handling PMU interrupts for PV guests, make these interrupts
>> NMI instead of PMU_APIC_VECTOR vector. Depending on vpmu_mode forward the
>> interrupts to appropriate guest (mode is VPMU_ON) or to dom0 (VPMU_DOM0).
> Is using NMIs here a necessity? I guess not, in which case I'd really
> like this to be a (perhaps even non-default) option controllable via
> command line option.
It is not a necessity but using NMIs will allow us to profile code that runs
with interrupts disabled.
>> - * This interrupt handles performance counters interrupt
>> - */
>> -
>> -void pmu_apic_interrupt(struct cpu_user_regs *regs)
>> -{
>> - ack_APIC_irq();
>> - vpmu_do_interrupt(regs);
>> -}
> So this was the only caller of vpmu_do_interrupt(); no new one gets
> added in this patch afaics, and I don't recall having seen addition of
> another caller in earlier patches. What's the deal?
It's in 09/13:
+int pmu_nmi_interrupt(struct cpu_user_regs *regs, int cpu)
+{
+ return vpmu_do_interrupt(regs);
+}
+
-boris
next prev parent reply other threads:[~2013-09-25 15:17 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-20 9:41 [PATCH v2 00/13] x86/PMU: Xen PMU PV support Boris Ostrovsky
2013-09-20 9:42 ` [PATCH v2 01/13] Export hypervisor symbols Boris Ostrovsky
2013-09-23 19:42 ` Konrad Rzeszutek Wilk
2013-09-23 20:06 ` Boris Ostrovsky
2013-09-24 17:40 ` Konrad Rzeszutek Wilk
2013-09-25 13:15 ` Jan Beulich
2013-09-25 14:03 ` Boris Ostrovsky
2013-09-25 14:53 ` Jan Beulich
2013-09-20 9:42 ` [PATCH v2 02/13] Set VCPU's is_running flag closer to when the VCPU is dispatched Boris Ostrovsky
2013-09-25 13:42 ` Jan Beulich
2013-09-25 14:08 ` Keir Fraser
2013-09-20 9:42 ` [PATCH v2 03/13] x86/PMU: Stop AMD counters when called from vpmu_save_force() Boris Ostrovsky
2013-09-20 9:42 ` [PATCH v2 04/13] x86/VPMU: Minor VPMU cleanup Boris Ostrovsky
2013-09-20 9:42 ` [PATCH v2 05/13] intel/VPMU: Clean up Intel VPMU code Boris Ostrovsky
2013-09-23 11:42 ` Dietmar Hahn
2013-09-23 19:46 ` Konrad Rzeszutek Wilk
2013-09-25 13:55 ` Jan Beulich
2013-09-25 14:39 ` Boris Ostrovsky
2013-09-25 14:57 ` Jan Beulich
2013-09-25 15:37 ` Boris Ostrovsky
2013-09-20 9:42 ` [PATCH v2 06/13] x86/PMU: Add public xenpmu.h Boris Ostrovsky
2013-09-23 13:04 ` Dietmar Hahn
2013-09-23 13:16 ` Jan Beulich
2013-09-23 14:00 ` Boris Ostrovsky
2013-09-23 13:45 ` Boris Ostrovsky
2013-09-25 14:04 ` Jan Beulich
2013-09-25 15:59 ` Boris Ostrovsky
2013-09-25 16:08 ` Jan Beulich
2013-09-30 13:25 ` Boris Ostrovsky
2013-09-30 13:30 ` Jan Beulich
2013-09-30 13:55 ` Boris Ostrovsky
2013-09-20 9:42 ` [PATCH v2 07/13] x86/PMU: Make vpmu not HVM-specific Boris Ostrovsky
2013-09-25 14:05 ` Jan Beulich
2013-09-25 14:49 ` Boris Ostrovsky
2013-09-25 14:57 ` Jan Beulich
2013-09-20 9:42 ` [PATCH v2 08/13] x86/PMU: Interface for setting PMU mode and flags Boris Ostrovsky
2013-09-25 14:11 ` Jan Beulich
2013-09-25 14:55 ` Boris Ostrovsky
2013-09-20 9:42 ` [PATCH v2 09/13] x86/PMU: Initialize PMU for PV guests Boris Ostrovsky
2013-09-20 9:42 ` [PATCH v2 10/13] x86/PMU: Add support for PMU registes handling on " Boris Ostrovsky
2013-09-23 13:50 ` Dietmar Hahn
2013-09-25 14:23 ` Jan Beulich
2013-09-25 15:03 ` Boris Ostrovsky
2013-09-20 9:42 ` [PATCH v2 11/13] x86/PMU: Handle PMU interrupts for " Boris Ostrovsky
2013-09-25 14:33 ` Jan Beulich
2013-09-25 14:40 ` Andrew Cooper
2013-09-25 15:52 ` Boris Ostrovsky
2013-09-25 15:19 ` Boris Ostrovsky [this message]
2013-09-25 15:25 ` Jan Beulich
2013-09-20 9:42 ` [PATCH v2 12/13] x86/PMU: Save VPMU state for PV guests during context switch Boris Ostrovsky
2013-09-20 9:42 ` [PATCH v2 13/13] x86/PMU: Move vpmu files up from hvm directory Boris Ostrovsky
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