From nobody Tue Dec 16 14:42:46 2025 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BDE2B21885A for ; Sat, 6 Dec 2025 00:17:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764980253; cv=none; b=ZQUqZJpF3TIFGhN5MexPSkf8Kg+GfN9bJXksFxOELqKw1mUf2Mln1IKdufUYcIetpGvw02xLDV3SLpvMLcW1b5L5d923GITKZlQ1I66CzqVYmgtIneYd4+c08D8a/AvVfdnPlX7d4vnpfq+5DuoByu5LxqFdJB9p+yJV7BJVtXk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764980253; c=relaxed/simple; bh=53ZMr2ZRIpu7IbiEdlebeII/cbBReqilV+Dt6eLN4/M=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=XWOckPjRoDsVe91vJQAjb5KW0EWVRPeMM0l9mr8kyjsISTzezTLQ2MK2ZlkReJJ+uPqX6vgDbhY9z0Hy3/MFD+wymbJkuDEguaoFkg2523rd49gjIM5lD9+FZzsXhidvyHMSeMGvvGGgYwHf02plqJRs26Zf/ZSKWAxQZmkkVKc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=O+XPlgCr; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="O+XPlgCr" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-340c0604e3dso3051511a91.2 for ; Fri, 05 Dec 2025 16:17:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1764980251; x=1765585051; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=UxEE6YFCrywRRLGygEARIDA06aPKgmiMBn7nXQjzdiI=; b=O+XPlgCrt31UvHqt1Yhm5OIlmo5qQ3OxvcB9NX19SC6EUoqFrv6xPgLXOeRENDgKmt BmHD0E8fhS6vD42fOvVRVYL1OPaN5NQrbWsJUxDRWnz6BmkmZMpBoZ3g10hSAc5oPXNy qd7C/FQ+3HAjuxRc+upNC4iGHXZCU8Gkl0xRfPeXMisrHOgTnVCuQNLmNiMiZZnMp8UM elVL6c5/ggQlrK0cs5Mxzn4lYsQs3kkkmC3g6Gq4ofFj2q2MbmAwC8lToD9oYE30us71 X10Z0WSlSFR98SvxVzo90De/OPOXkN+qNmJbdQLwW+ipL/0w0ISnxPckE0X692l1n8r4 dB+A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764980251; x=1765585051; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=UxEE6YFCrywRRLGygEARIDA06aPKgmiMBn7nXQjzdiI=; b=URPD+1w6EUlBmF0mogCJz4uWNRpHrfse5NZkeOqoZtewUUmCo+rp1D337xo60ChW4y YbtLVBuQAQ69iQL3PfNaADrxpCGymK8H8nZb+uKHnANV3owRxCexFyUT+VauPuE9YUG9 7S4hMCNhGBy2Z4hqfq6G3HuFe/KqtsGsoKtQHCJjl1U+56MvSz/HCRzhNJav+ZogbkH5 k2jBP7Uihb2CS7Cc7W96XPMk332sfkU5ycOfE5rFyilQJ1ZY4gAAuJYBl+fYdb2cfF7V NNrwbdGQC3uJY+V+lJ/Ckhm4JaqzG4sBwrzAiPfua9epQ18DYr9kzl7fk8eaLrErxBap Qm9w== X-Forwarded-Encrypted: i=1; AJvYcCUKv/o7yEf44EyK+YmUUlamjWUkGrt3v6W1qEzQqcIs+u+Glz60q7pVAu27LJEY6PsNPYPCVX3BARK2kiY=@vger.kernel.org X-Gm-Message-State: AOJu0YwSexKg2nkq4ZwNgX5y4maAOipLQUxtXjM5VcDoDWuktS6gwA9C gO8I6RlvNNDRRuhYP/l+zMw1PjOqxYvhDXrz2MTlqDnL7fgzHzIU9qg17Eut7ZdcI0BaKxEoduw JXjSn4w== X-Google-Smtp-Source: AGHT+IHjg9edpOr3D1FDjetV+9fqRbGzj3yZXk9Coy0VtACLss4vYlJyIABW7Xcv++xOTx44sX1NPQCjnv8= X-Received: from pjbkr8.prod.google.com ([2002:a17:90b:4908:b0:343:387b:f2fa]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:38d0:b0:349:8116:a2e1 with SMTP id 98e67ed59e1d1-349a25fe29fmr699857a91.20.1764980251086; Fri, 05 Dec 2025 16:17:31 -0800 (PST) Reply-To: Sean Christopherson Date: Fri, 5 Dec 2025 16:16:38 -0800 In-Reply-To: <20251206001720.468579-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251206001720.468579-1-seanjc@google.com> X-Mailer: git-send-email 2.52.0.223.gf5cc29aaa4-goog Message-ID: <20251206001720.468579-3-seanjc@google.com> Subject: [PATCH v6 02/44] perf: Add generic exclude_guest support From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Xin Li , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Sean Christopherson , Paolo Bonzini Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, loongarch@lists.linux.dev, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Mingwei Zhang , Xudong Hao , Sandipan Das , Dapeng Mi , Xiong Zhang , Manali Shukla , Jim Mattson Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Kan Liang Only KVM knows the exact time when a guest is entering/exiting. Expose two interfaces to KVM to switch the ownership of the PMU resources. All the pinned events must be scheduled in first. Extend the perf_event_sched_in() helper to support extra flag, e.g., EVENT_GUEST. Signed-off-by: Kan Liang Signed-off-by: Mingwei Zhang Tested-by: Xudong Hao Signed-off-by: Sean Christopherson --- kernel/events/core.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index 4cc95dd15620..1e37ab90b815 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -2872,14 +2872,15 @@ static void task_ctx_sched_out(struct perf_event_co= ntext *ctx, =20 static void perf_event_sched_in(struct perf_cpu_context *cpuctx, struct perf_event_context *ctx, - struct pmu *pmu) + struct pmu *pmu, + enum event_type_t event_type) { - ctx_sched_in(&cpuctx->ctx, pmu, EVENT_PINNED); + ctx_sched_in(&cpuctx->ctx, pmu, EVENT_PINNED | event_type); if (ctx) - ctx_sched_in(ctx, pmu, EVENT_PINNED); - ctx_sched_in(&cpuctx->ctx, pmu, EVENT_FLEXIBLE); + ctx_sched_in(ctx, pmu, EVENT_PINNED | event_type); + ctx_sched_in(&cpuctx->ctx, pmu, EVENT_FLEXIBLE | event_type); if (ctx) - ctx_sched_in(ctx, pmu, EVENT_FLEXIBLE); + ctx_sched_in(ctx, pmu, EVENT_FLEXIBLE | event_type); } =20 /* @@ -2935,7 +2936,7 @@ static void ctx_resched(struct perf_cpu_context *cpuc= tx, else if (event_type & EVENT_PINNED) ctx_sched_out(&cpuctx->ctx, pmu, EVENT_FLEXIBLE); =20 - perf_event_sched_in(cpuctx, task_ctx, pmu); + perf_event_sched_in(cpuctx, task_ctx, pmu, 0); =20 for_each_epc(epc, &cpuctx->ctx, pmu, 0) perf_pmu_enable(epc->pmu); @@ -4153,7 +4154,7 @@ static void perf_event_context_sched_in(struct task_s= truct *task) ctx_sched_out(&cpuctx->ctx, NULL, EVENT_FLEXIBLE); } =20 - perf_event_sched_in(cpuctx, ctx, NULL); + perf_event_sched_in(cpuctx, ctx, NULL, 0); =20 perf_ctx_sched_task_cb(cpuctx->task_ctx, task, true); =20 --=20 2.52.0.223.gf5cc29aaa4-goog