Re: [kvm-unit-tests PATCH 0/4] x86/pmu: PEBS fixes and new testcases

From: "Mi, Dapeng" <dapeng1.mi@linux.intel.com>
To: Sean Christopherson <seanjc@google.com>,
	Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, Like Xu <like.xu.linux@gmail.com>,
	Mingwei Zhang <mizhang@google.com>,
	Zhenyu Wang <zhenyuw@linux.intel.com>,
	Zhang Xiong <xiong.y.zhang@intel.com>,
	Lv Zhiyuan <zhiyuan.lv@intel.com>,
	Dapeng Mi <dapeng1.mi@intel.com>
Subject: Re: [kvm-unit-tests PATCH 0/4] x86/pmu: PEBS fixes and new testcases
Date: Thu, 7 Mar 2024 17:22:09 +0800	[thread overview]
Message-ID: <b0eb5d58-efbd-4f4a-98d6-d470b242c238@linux.intel.com> (raw)
In-Reply-To: <20240306230153.786365-1-seanjc@google.com>


On 3/7/2024 7:01 AM, Sean Christopherson wrote:
> One bug fix where pmu_pebs attempts to enable PEBS for fixed counter on
> CPUs without Extended PEBS, and two new testcases to verify adaptive
> PEBS functionality.
>
> The new testcases are intended both to demonstrate that adaptive PEBS
> virtualization is currently broken, and to serve as a gatekeeper for
> re-enabling adapative PEBS in the future.
>
> https://lore.kernel.org/all/ZeepGjHCeSfadANM@google.com
>
> Sean Christopherson (4):
>    x86/pmu: Enable PEBS on fixed counters iff baseline PEBS is support
>    x86/pmu: Iterate over adaptive PEBS flag combinations
>    x86/pmu: Test adaptive PEBS without any adaptive counters
>    x86/pmu: Add a PEBS test to verify the host LBRs aren't leaked to the
>      guest
>
>   lib/x86/pmu.h  |   6 ++-
>   x86/pmu_pebs.c | 109 +++++++++++++++++++++++++++----------------------
>   2 files changed, 66 insertions(+), 49 deletions(-)

Tested-by: Dapeng Mi <dapeng1.mi@linux.intel.com>

>
> base-commit: 55dd01b4f066577b49f03fb7146723c4a65822c4