From: Marc Zyngier <maz@kernel.org>
To: Sean Christopherson <seanjc@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>, Guo Ren <guoren@kernel.org>,
Nick Hu <nickhu@andestech.com>, Greentime Hu <green.hu@gmail.com>,
Vincent Chen <deanbo422@gmail.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Paolo Bonzini <pbonzini@redhat.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Juergen Gross <jgross@suse.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
Stefano Stabellini <sstabellini@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
kvmarm@lists.cs.columbia.edu, linux-csky@vger.kernel.org,
linux-riscv@lists.infradead.org, kvm@vger.kernel.org,
xen-devel@lists.xenproject.org,
Artem Kashkanov <artem.kashkanov@intel.com>,
Like Xu <like.xu.linux@gmail.com>,
Zhu Lingshan <lingshan.zhu@intel.com>
Subject: Re: [PATCH v3 14/16] KVM: arm64: Convert to the generic perf callbacks
Date: Mon, 11 Oct 2021 10:38:49 +0100 [thread overview]
Message-ID: <87v923q4t2.wl-maz@kernel.org> (raw)
In-Reply-To: <20210922000533.713300-15-seanjc@google.com>
On Wed, 22 Sep 2021 01:05:31 +0100,
Sean Christopherson <seanjc@google.com> wrote:
>
> Drop arm64's version of the callbacks in favor of the callbacks provided
> by generic KVM, which are semantically identical.
>
> Signed-off-by: Sean Christopherson <seanjc@google.com>
> ---
> arch/arm64/kvm/perf.c | 34 ++--------------------------------
> 1 file changed, 2 insertions(+), 32 deletions(-)
>
> diff --git a/arch/arm64/kvm/perf.c b/arch/arm64/kvm/perf.c
> index 3e99ac4ab2d6..0b902e0d5b5d 100644
> --- a/arch/arm64/kvm/perf.c
> +++ b/arch/arm64/kvm/perf.c
> @@ -13,45 +13,15 @@
>
> DEFINE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
>
> -static unsigned int kvm_guest_state(void)
> -{
> - struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
> - unsigned int state;
> -
> - if (!vcpu)
> - return 0;
> -
> - state = PERF_GUEST_ACTIVE;
> - if (!vcpu_mode_priv(vcpu))
> - state |= PERF_GUEST_USER;
> -
> - return state;
> -}
> -
> -static unsigned long kvm_get_guest_ip(void)
> -{
> - struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
> -
> - if (WARN_ON_ONCE(!vcpu))
> - return 0;
> -
> - return *vcpu_pc(vcpu);
> -}
> -
> -static struct perf_guest_info_callbacks kvm_guest_cbs = {
> - .state = kvm_guest_state,
> - .get_ip = kvm_get_guest_ip,
> -};
> -
> void kvm_perf_init(void)
> {
> if (kvm_pmu_probe_pmuver() != 0xf && !is_protected_kvm_enabled())
> static_branch_enable(&kvm_arm_pmu_available);
>
> - perf_register_guest_info_callbacks(&kvm_guest_cbs);
> + kvm_register_perf_callbacks(NULL);
> }
>
> void kvm_perf_teardown(void)
> {
> - perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
> + kvm_unregister_perf_callbacks();
> }
Reviewed-by: Marc Zyngier <maz@kernel.org>
M.
--
Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2021-10-11 9:38 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-22 0:05 [PATCH v3 00/16] perf: KVM: Fix, optimize, and clean up callbacks Sean Christopherson
2021-09-22 0:05 ` [PATCH v3 01/16] perf: Ensure perf_guest_cbs aren't reloaded between !NULL check and deref Sean Christopherson
2021-11-04 9:32 ` Like Xu
2021-11-04 14:18 ` Sean Christopherson
2021-11-10 11:07 ` Paolo Bonzini
2021-11-11 0:39 ` Sean Christopherson
2021-09-22 0:05 ` [PATCH v3 02/16] KVM: x86: Register perf callbacks after calling vendor's hardware_setup() Sean Christopherson
2021-09-22 6:23 ` Paolo Bonzini
2021-09-22 0:05 ` [PATCH v3 03/16] KVM: x86: Register Processor Trace interrupt hook iff PT enabled in guest Sean Christopherson
2021-09-22 6:24 ` Paolo Bonzini
2021-09-22 0:05 ` [PATCH v3 04/16] perf: Stop pretending that perf can handle multiple guest callbacks Sean Christopherson
2021-09-22 6:25 ` Paolo Bonzini
2021-09-22 0:05 ` [PATCH v3 05/16] perf: Drop dead and useless guest "support" from arm, csky, nds32 and riscv Sean Christopherson
2021-09-22 6:26 ` Paolo Bonzini
2021-09-22 0:05 ` [PATCH v3 06/16] perf/core: Rework guest callbacks to prepare for static_call support Sean Christopherson
2021-09-22 6:28 ` Paolo Bonzini
2021-09-22 18:31 ` Boris Ostrovsky
2021-09-22 0:05 ` [PATCH v3 07/16] perf: Add wrappers for invoking guest callbacks Sean Christopherson
2021-09-22 6:29 ` Paolo Bonzini
2021-09-22 0:05 ` [PATCH v3 08/16] perf: Force architectures to opt-in to " Sean Christopherson
2021-09-22 6:32 ` Paolo Bonzini
2021-09-22 14:48 ` Sean Christopherson
2021-11-09 23:46 ` Sean Christopherson
2021-09-22 0:05 ` [PATCH v3 09/16] perf/core: Use static_call to optimize perf_guest_info_callbacks Sean Christopherson
2021-09-22 6:33 ` Paolo Bonzini
2021-09-22 0:05 ` [PATCH v3 10/16] KVM: x86: Drop current_vcpu for kvm_running_vcpu + kvm_arch_vcpu variable Sean Christopherson
2021-09-22 6:40 ` Paolo Bonzini
2021-09-22 0:05 ` [PATCH v3 11/16] KVM: x86: More precisely identify NMI from guest when handling PMI Sean Christopherson
2021-09-22 6:38 ` Paolo Bonzini
2021-09-22 0:05 ` [PATCH v3 12/16] KVM: Move x86's perf guest info callbacks to generic KVM Sean Christopherson
2021-09-22 6:41 ` Paolo Bonzini
2021-10-11 9:35 ` Marc Zyngier
2021-10-11 14:46 ` Sean Christopherson
2021-10-11 15:33 ` Marc Zyngier
2021-09-22 0:05 ` [PATCH v3 13/16] KVM: x86: Move Intel Processor Trace interrupt handler to vmx.c Sean Christopherson
2021-09-22 0:05 ` [PATCH v3 14/16] KVM: arm64: Convert to the generic perf callbacks Sean Christopherson
2021-10-11 9:38 ` Marc Zyngier [this message]
2021-09-22 0:05 ` [PATCH v3 15/16] KVM: arm64: Drop perf.c and fold its tiny bits of code into arm.c / pmu.c Sean Christopherson
2021-10-11 9:44 ` Marc Zyngier
2021-11-09 23:16 ` Sean Christopherson
2021-09-22 0:05 ` [PATCH v3 16/16] perf: Drop guest callback (un)register stubs Sean Christopherson
2021-09-22 6:29 ` Paolo Bonzini
2021-09-22 6:42 ` [PATCH v3 00/16] perf: KVM: Fix, optimize, and clean up callbacks Paolo Bonzini
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