From patchwork Sat Jun 10 06:15:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reiji Watanabe X-Patchwork-Id: 13274728 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C58BBC77B7A for ; Sat, 10 Jun 2023 06:16:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:From:Subject:Message-ID: References:Mime-Version:In-Reply-To:Date:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=qFNFacDefFuHEmwGbpyaoqFqap14hw51Y29gXt1eMaM=; b=ws1W8Ft/RLB/uLXLcOoGdWESTA NFqlkKRuw34SLuHXEp76uiRV2MG8EzmcYYlAvV5uFShxQN0Woi/9ND2SPWFWe4df0B56JQHjkSzg3 +RPVirjdT2Fejj2la6y3TP3OuL9BTjoaiuJSCEu16SZVcqlrKOq/GtbshuaS2XPJANyknhOa4KwGg biofU2hGz195v/BHnRPqM60mOqCaujYrBSZBgct/2FIYmCSj8tzjM7wp7yQssdBH7IHKmAEnrhFcm 7KCss/YATqWUXh3SzH5N8yNJmRgL5cBBTxSO0IQBMXlE1qPkLQtcwl5aMx3rDd5ezVBc/O6e1koK6 46p/TZow==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q7rtB-00FM3O-34; Sat, 10 Jun 2023 06:15:53 +0000 Received: from mail-yb1-xb49.google.com ([2607:f8b0:4864:20::b49]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q7rt9-00FM2o-2U for linux-arm-kernel@lists.infradead.org; Sat, 10 Jun 2023 06:15:53 +0000 Received: by mail-yb1-xb49.google.com with SMTP id 3f1490d57ef6-bad475920a8so7915428276.1 for ; Fri, 09 Jun 2023 23:15:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1686377750; x=1688969750; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=XLDsl1lE9fKzoXIg8MPnOFwUsmvQwygsh/INqaD/ueI=; b=UXc1xrBzdBOHgPQCOKCE2wNtYRgmzI+RQz6iY7jqlTfPceGe8tt2VMepKsGukaoYIa rzVoXP04E5vTRIA+ikBFVrDAcy7bloizNSUaTJhzYOECZl3wkLSMZq+XATfYdTlkZRKM FD1ZE/J4yrcDhasx1GF+l/LHPaCm2AN+dnhJG0Y+CWXKaGkMgKzct2jnOokOTkUn2wYd Bc4yjOcQO7urvkPY3uxi+wn8za7LZjpnUgvGGDwBsvWSuXzmN219boKVn62J2AXwM2bc miAMFWnxzMl1GsD5Bj4PXBdMFNm3ql+fyIDyrVUWZzlI65MuXPXJpmFCdaAg8OBc7I8h C0Sw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686377750; x=1688969750; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=XLDsl1lE9fKzoXIg8MPnOFwUsmvQwygsh/INqaD/ueI=; b=Tdc07tEy+MGZYL0f9KAnTb2bq5/FRtw6KV+9EZoh8SrU7FCpVORf8zXc/+ifCyl96/ 2hw0hAKHGSuH8yrI1ooUTJrc67hHkAQ2rup4/uMtK8gga0LiO06iefBEyUW3COBs1oPm xXQJS65ZZCyo4TnwdKoWfO9+tcHB40oeP0oG9cFvEsax90XjkH09KipUGcGgNa9OpYRU T3UOcfnB2jal9Q0jSAnP0c9BsW5Scf3lDoAFW14VlQirYM5eHRIqEbn0jtJ91CSXN9dp omxedfuFtj1++ArQwaQdq4OkCSwWnQ3r865f2NQ1TcdOef8kcElqOTHDweoVtaejn+co CqIA== X-Gm-Message-State: AC+VfDzRKtkJ5pRwBFXAYyJHwFVmbN2ZGg0vHHXwxpetpDO4/hlVq/co 9wgLnEVB2hXoe99bOruCAaHtNthOsp8= X-Google-Smtp-Source: ACHHUZ6XJDpHi/HdxtmR8FpIa1JbQfGhF/z0iFxliMSkJFXID9aX9+1u8XSDF829uN+7AjpPFpq3nAnn06c= X-Received: from reijiw-west4.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:aa1]) (user=reijiw job=sendgmr) by 2002:a25:8c07:0:b0:bad:2b06:da3 with SMTP id k7-20020a258c07000000b00bad2b060da3mr2303926ybl.3.1686377750578; Fri, 09 Jun 2023 23:15:50 -0700 (PDT) Date: Fri, 9 Jun 2023 23:15:19 -0700 In-Reply-To: <20230610061520.3026530-1-reijiw@google.com> Mime-Version: 1.0 References: <20230610061520.3026530-1-reijiw@google.com> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog Message-ID: <20230610061520.3026530-2-reijiw@google.com> Subject: [PATCH 1/2] KVM: arm64: PMU: Introduce pmu_v3_is_supported() helper From: Reiji Watanabe To: Marc Zyngier , Oliver Upton , kvmarm@lists.linux.dev Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, James Morse , Alexandru Elisei , Zenghui Yu , Suzuki K Poulose , Jing Zhang , Raghavendra Rao Anata , Reiji Watanabe X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230609_231551_833766_D249FC87 X-CRM114-Status: GOOD ( 14.14 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Introduce pmu_v3_is_supported() helper to check if the given PMUVer supports PMUv3, and use it instead of open coding it. Signed-off-by: Reiji Watanabe --- arch/arm64/kvm/pmu-emul.c | 3 +-- arch/arm64/kvm/sys_regs.c | 2 +- include/kvm/arm_pmu.h | 8 ++++++++ 3 files changed, 10 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kvm/pmu-emul.c b/arch/arm64/kvm/pmu-emul.c index 491ca7eb2a4c..5d2903f52a5f 100644 --- a/arch/arm64/kvm/pmu-emul.c +++ b/arch/arm64/kvm/pmu-emul.c @@ -672,8 +672,7 @@ void kvm_host_pmu_init(struct arm_pmu *pmu) { struct arm_pmu_entry *entry; - if (pmu->pmuver == ID_AA64DFR0_EL1_PMUVer_NI || - pmu->pmuver == ID_AA64DFR0_EL1_PMUVer_IMP_DEF) + if (!pmu_v3_is_supported(pmu->pmuver)) return; mutex_lock(&arm_pmus_lock); diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 753aa7418149..9200b18127f6 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1408,7 +1408,7 @@ static int set_id_aa64dfr0_el1(struct kvm_vcpu *vcpu, if ((pmuver != ID_AA64DFR0_EL1_PMUVer_IMP_DEF && pmuver > host_pmuver)) return -EINVAL; - valid_pmu = (pmuver != 0 && pmuver != ID_AA64DFR0_EL1_PMUVer_IMP_DEF); + valid_pmu = pmu_v3_is_supported(pmuver); /* Make sure view register and PMU support do match */ if (kvm_vcpu_has_pmu(vcpu) != valid_pmu) diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h index 1a6a695ca67a..eef17de966da 100644 --- a/include/kvm/arm_pmu.h +++ b/include/kvm/arm_pmu.h @@ -12,6 +12,14 @@ #define ARMV8_PMU_CYCLE_IDX (ARMV8_PMU_MAX_COUNTERS - 1) +static inline bool pmu_v3_is_supported(int pmuver) +{ + WARN_ON_ONCE(pmuver & ~GENMASK_ULL(ARM64_FEATURE_FIELD_BITS - 1, 0)); + + return (pmuver != ID_AA64DFR0_EL1_PMUVer_NI) && + (pmuver != ID_AA64DFR0_EL1_PMUVer_IMP_DEF); +} + #ifdef CONFIG_HW_PERF_EVENTS struct kvm_pmc {