From patchwork Thu Jan 30 13:25:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 11358037 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A172113B4 for ; Thu, 30 Jan 2020 13:29:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7EEC2215A4 for ; Thu, 30 Jan 2020 13:29:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580390955; bh=7pqJxwe0f7R70UEhqXeOaCEo6sb89MA9E0VPKvlaRjY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=jrejekH8ZtclrhV/LI6tRJa51UZTdP89+3znq+Vd4urvvr1GME7rCF6UN5+dk7z/T jQvp631GIVFRVylWFM9UvnnSRlML9kKRqa0taHTis2e2RFMqZhb4mTTv9gSC/3d/wU s3w8lxuX2XIsmKuOc81ihbouUNBZjLJG6g6MD6MY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727262AbgA3N3O (ORCPT ); Thu, 30 Jan 2020 08:29:14 -0500 Received: from mail.kernel.org ([198.145.29.99]:47970 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727265AbgA3N3O (ORCPT ); Thu, 30 Jan 2020 08:29:14 -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 A083A2082E; Thu, 30 Jan 2020 13:29:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580390953; bh=7pqJxwe0f7R70UEhqXeOaCEo6sb89MA9E0VPKvlaRjY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YRDdbI50xGCvh4VibmZBve4B3l6No67jkHBGvhgg7gFCR+1bvb1ND1mqVafFXZ5uI j25eUeauKjRYY2Mg3VcPbMcTxz7KSvlEuyxP+coY6xsJENB8mhvNbQ7Bvo9eVAtwrA dIekCyK9FmetSYIEYRcTPOdZfw69keBjORQV8zC8= 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 1ix9q2-002BmW-2k; Thu, 30 Jan 2020 13:26:30 +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 19/23] KVM: arm64: pmu: Don't increment SW_INCR if PMCR.E is unset Date: Thu, 30 Jan 2020 13:25:54 +0000 Message-Id: <20200130132558.10201-20-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 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 The specification says PMSWINC increments PMEVCNTR_EL1 by 1 if PMEVCNTR_EL0 is enabled and configured to count SW_INCR. For PMEVCNTR_EL0 to be enabled, we need both PMCNTENSET to be set for the corresponding event counter but we also need the PMCR.E bit to be set. Fixes: 7a0adc7064b8 ("arm64: KVM: Add access handler for PMSWINC register") Signed-off-by: Eric Auger Signed-off-by: Marc Zyngier Reviewed-by: Andrew Murray Acked-by: Marc Zyngier Link: https://lore.kernel.org/r/20200124142535.29386-2-eric.auger@redhat.com --- virt/kvm/arm/pmu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c index 8731dfeced8b..c3f8b059881e 100644 --- a/virt/kvm/arm/pmu.c +++ b/virt/kvm/arm/pmu.c @@ -486,6 +486,9 @@ void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) if (val == 0) return; + if (!(__vcpu_sys_reg(vcpu, PMCR_EL0) & ARMV8_PMU_PMCR_E)) + return; + enable = __vcpu_sys_reg(vcpu, PMCNTENSET_EL0); for (i = 0; i < ARMV8_PMU_CYCLE_IDX; i++) { if (!(val & BIT(i)))