linux-kernel - Re: [PATCH v4 00/17] perf: KVM: Fix, optimize, and clean up callbacks

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Date:   Thu, 11 Nov 2021 12:19:21 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        Marc Zyngier <maz@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Guo Ren <guoren@...nel.org>, Nick Hu <nickhu@...estech.com>,
        Greentime Hu <green.hu@...il.com>,
        Vincent Chen <deanbo422@...il.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Stefano Stabellini <sstabellini@...nel.org>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-csky@...r.kernel.org, linux-riscv@...ts.infradead.org,
        kvm@...r.kernel.org, xen-devel@...ts.xenproject.org,
        Artem Kashkanov <artem.kashkanov@...el.com>,
        Like Xu <like.xu.linux@...il.com>,
        Like Xu <like.xu@...ux.intel.com>,
        Zhu Lingshan <lingshan.zhu@...el.com>
Subject: Re: [PATCH v4 00/17] perf: KVM: Fix, optimize, and clean up callbacks

On Thu, Nov 11, 2021 at 02:07:21AM +0000, Sean Christopherson wrote:

> Like Xu (1):
>   perf/core: Rework guest callbacks to prepare for static_call support
> 
> Sean Christopherson (16):
>   perf: Protect perf_guest_cbs with RCU
>   KVM: x86: Register perf callbacks after calling vendor's
>     hardware_setup()
>   KVM: x86: Register Processor Trace interrupt hook iff PT enabled in
>     guest
>   perf: Stop pretending that perf can handle multiple guest callbacks
>   perf: Drop dead and useless guest "support" from arm, csky, nds32 and
>     riscv
>   perf: Add wrappers for invoking guest callbacks
>   perf: Force architectures to opt-in to guest callbacks
>   perf/core: Use static_call to optimize perf_guest_info_callbacks
>   KVM: x86: Drop current_vcpu for kvm_running_vcpu + kvm_arch_vcpu
>     variable
>   KVM: x86: More precisely identify NMI from guest when handling PMI
>   KVM: Move x86's perf guest info callbacks to generic KVM
>   KVM: x86: Move Intel Processor Trace interrupt handler to vmx.c
>   KVM: arm64: Convert to the generic perf callbacks
>   KVM: arm64: Hide kvm_arm_pmu_available behind CONFIG_HW_PERF_EVENTS=y
>   KVM: arm64: Drop perf.c and fold its tiny bits of code into arm.c
>   perf: Drop guest callback (un)register stubs

Thanks!, I'll queue them up and push them into tip/perf/core once -rc1
happens.