From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD1E6C35240 for ; Thu, 30 Jan 2020 13:29:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 928072253D for ; Thu, 30 Jan 2020 13:29:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580390965; bh=S44wgqDz5QqgcZSh45zo1cMbpSbFaioabsF/IfKvJ0w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MKUju6yfJ5y1uI2UmlxHCh6aJLDQJEKJd2y61U8MlH/EZifVQZB82P4Vx+Z79wKfK 2+8jhhgY6zxJoSyYTGTTyuCkaWHcCHyQOO7YhfBoaqlEEvCmVNUtDVnaSuIogSc/7R joNpv5c/xVQq/gxUmu/q/S5Wp8D+sD3IcNJcCN58= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727427AbgA3N3Y (ORCPT ); Thu, 30 Jan 2020 08:29:24 -0500 Received: from mail.kernel.org ([198.145.29.99]:48346 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727437AbgA3N3Y (ORCPT ); Thu, 30 Jan 2020 08:29:24 -0500 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 064B32465B; Thu, 30 Jan 2020 13:29:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580390963; bh=S44wgqDz5QqgcZSh45zo1cMbpSbFaioabsF/IfKvJ0w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SE6rUarZCExQoEXpGPJDLwP9q0uU22kebrY3S5JjSdHfpzrtG7dJyzco6MOau6sp9 7BuF2S3YGFB7VpvbVy7tTHQy5LTC3yZuKLq+UGEFD19TLPqVlNdEUpuG97clqqvFIQ QQWVl1DpqZPqETqOg7Xi9YcCWX6h6fmBGFGCxL3A= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ix9q6-002BmW-6j; Thu, 30 Jan 2020 13:26:34 +0000 From: Marc Zyngier To: Paolo Bonzini Cc: Alexandru Elisei , Andrew Jones , Andrew Murray , Beata Michalska , Christoffer Dall , Eric Auger , Gavin Shan , Haibin Wang , James Morse , Mark Brown , Mark Rutland , Russell King , Shannon Zhao , Steven Price , Will Deacon , YueHaibing , Zenghui Yu , Julien Thierry , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH 22/23] KVM: arm64: pmu: Only handle supported event counters Date: Thu, 30 Jan 2020 13:25:57 +0000 Message-Id: <20200130132558.10201-23-maz@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200130132558.10201-1-maz@kernel.org> References: <20200130132558.10201-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: pbonzini@redhat.com, alexandru.elisei@arm.com, drjones@redhat.com, andrew.murray@arm.com, beata.michalska@linaro.org, christoffer.dall@arm.com, eric.auger@redhat.com, gshan@redhat.com, wanghaibin.wang@huawei.com, james.morse@arm.com, broonie@kernel.org, mark.rutland@arm.com, rmk+kernel@armlinux.org.uk, shannon.zhao@linux.alibaba.com, steven.price@arm.com, will@kernel.org, yuehaibing@huawei.com, yuzenghui@huawei.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Eric Auger Let the code never use unsupported event counters. Change kvm_pmu_handle_pmcr() to only reset supported counters and kvm_pmu_vcpu_reset() to only stop supported counters. Other actions are filtered on the supported counters in kvm/sysregs.c Signed-off-by: Eric Auger Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20200124142535.29386-5-eric.auger@redhat.com --- virt/kvm/arm/pmu.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c index 560db6282137..f0d0312c0a55 100644 --- a/virt/kvm/arm/pmu.c +++ b/virt/kvm/arm/pmu.c @@ -247,10 +247,11 @@ void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) */ void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) { - int i; + unsigned long mask = kvm_pmu_valid_counter_mask(vcpu); struct kvm_pmu *pmu = &vcpu->arch.pmu; + int i; - for (i = 0; i < ARMV8_PMU_MAX_COUNTERS; i++) + for_each_set_bit(i, &mask, 32) kvm_pmu_stop_counter(vcpu, &pmu->pmc[i]); bitmap_zero(vcpu->arch.pmu.chained, ARMV8_PMU_MAX_COUNTER_PAIRS); @@ -527,10 +528,9 @@ void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) */ void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) { - u64 mask; + unsigned long mask = kvm_pmu_valid_counter_mask(vcpu); int i; - mask = kvm_pmu_valid_counter_mask(vcpu); if (val & ARMV8_PMU_PMCR_E) { kvm_pmu_enable_counter_mask(vcpu, __vcpu_sys_reg(vcpu, PMCNTENSET_EL0) & mask); @@ -542,7 +542,7 @@ void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) kvm_pmu_set_counter_value(vcpu, ARMV8_PMU_CYCLE_IDX, 0); if (val & ARMV8_PMU_PMCR_P) { - for (i = 0; i < ARMV8_PMU_CYCLE_IDX; i++) + for_each_set_bit(i, &mask, 32) kvm_pmu_set_counter_value(vcpu, i, 0); } } -- 2.20.1