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Mon, 11 Oct 2021 09:38:52 +0000 (UTC) Received: from sofa.misterjones.org ([185.219.108.64] helo=why.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1mZrli-00FySl-62; Mon, 11 Oct 2021 10:38:50 +0100 Date: Mon, 11 Oct 2021 10:38:49 +0100 Message-ID: <87v923q4t2.wl-maz@kernel.org> From: Marc Zyngier To: Sean Christopherson Subject: Re: [PATCH v3 14/16] KVM: arm64: Convert to the generic perf callbacks In-Reply-To: <20210922000533.713300-15-seanjc@google.com> References: <20210922000533.713300-1-seanjc@google.com> <20210922000533.713300-15-seanjc@google.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.1 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: seanjc@google.com, peterz@infradead.org, mingo@redhat.com, acme@kernel.org, will@kernel.org, mark.rutland@arm.com, guoren@kernel.org, nickhu@andestech.com, green.hu@gmail.com, deanbo422@gmail.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, pbonzini@redhat.com, boris.ostrovsky@oracle.com, jgross@suse.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, james.morse@arm.com, alexandru.elisei@arm.com, suzuki.poulose@arm.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, 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@intel.com, like.xu.linux@gmail.com, lingshan.zhu@intel.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Cc: Wanpeng Li , kvm@vger.kernel.org, Peter Zijlstra , Guo Ren , linux-riscv@lists.infradead.org, Vincent Chen , Jiri Olsa , kvmarm@lists.cs.columbia.edu, Stefano Stabellini , xen-devel@lists.xenproject.org, Will Deacon , Joerg Roedel , linux-csky@vger.kernel.org, Alexander Shishkin , Ingo Molnar , Palmer Dabbelt , Like Xu , Albert Ou , Zhu Lingshan , Arnaldo Carvalho de Melo , Greentime Hu , Paul Walmsley , Namhyung Kim , Boris Ostrovsky , Artem Kashkanov , linux-arm-kernel@lists.infradead.org, Jim Mattson , Juergen Gross , Nick Hu , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Paolo Bonzini , Vitaly Kuznetsov X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On Wed, 22 Sep 2021 01:05:31 +0100, Sean Christopherson 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 > --- > 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 M. -- Without deviation from the norm, progress is not possible. _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm