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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, 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 6274BC2D0D4 for ; Fri, 20 Dec 2019 14:31:05 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 2434524688 for ; Fri, 20 Dec 2019 14:31:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2434524688 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id D1FC64A5A6; Fri, 20 Dec 2019 09:31:04 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UJjOOgEG1601; Fri, 20 Dec 2019 09:31:03 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id B6EBA4AC68; Fri, 20 Dec 2019 09:31:03 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 45ADD4A5A6 for ; Fri, 20 Dec 2019 09:31:02 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6ZiWPpV30pCi for ; Fri, 20 Dec 2019 09:31:01 -0500 (EST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 277824A7E4 for ; Fri, 20 Dec 2019 09:31:01 -0500 (EST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id DB5FF11D4; Fri, 20 Dec 2019 06:31:00 -0800 (PST) Received: from e119886-lin.cambridge.arm.com (unknown [10.37.6.20]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0EEF63F718; Fri, 20 Dec 2019 06:30:58 -0800 (PST) From: Andrew Murray To: Marc Zyngier , Catalin Marinas , Will Deacon Subject: [PATCH v2 13/18] perf: arm_spe: Add KVM structure for obtaining IRQ info Date: Fri, 20 Dec 2019 14:30:20 +0000 Message-Id: <20191220143025.33853-14-andrew.murray@arm.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191220143025.33853-1-andrew.murray@arm.com> References: <20191220143025.33853-1-andrew.murray@arm.com> MIME-Version: 1.0 Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Sudeep Holla , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org 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 KVM requires knowledge of the physical SPE IRQ number such that it can associate it with any virtual IRQ for guests that require SPE emulation. Let's create a structure to hold this information and an accessor that KVM can use to retrieve this information. We expect that each SPE device will have the same physical PPI number and thus will warn when this is not the case. Signed-off-by: Andrew Murray --- drivers/perf/arm_spe_pmu.c | 23 +++++++++++++++++++++++ include/kvm/arm_spe.h | 6 ++++++ 2 files changed, 29 insertions(+) diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c index 4e4984a55cd1..2d24af4cfcab 100644 --- a/drivers/perf/arm_spe_pmu.c +++ b/drivers/perf/arm_spe_pmu.c @@ -34,6 +34,9 @@ #include #include +#include +#include + #include #include #include @@ -1127,6 +1130,24 @@ static void arm_spe_pmu_dev_teardown(struct arm_spe_pmu *spe_pmu) free_percpu_irq(spe_pmu->irq, spe_pmu->handle); } +#ifdef CONFIG_KVM_ARM_SPE +static struct arm_spe_kvm_info arm_spe_kvm_info; + +struct arm_spe_kvm_info *arm_spe_get_kvm_info(void) +{ + return &arm_spe_kvm_info; +} + +static void arm_spe_populate_kvm_info(struct arm_spe_pmu *spe_pmu) +{ + WARN_ON_ONCE(arm_spe_kvm_info.physical_irq != 0 && + arm_spe_kvm_info.physical_irq != spe_pmu->irq); + arm_spe_kvm_info.physical_irq = spe_pmu->irq; +} +#else +static void arm_spe_populate_kvm_info(struct arm_spe_pmu *spe_pmu) {} +#endif + /* Driver and device probing */ static int arm_spe_pmu_irq_probe(struct arm_spe_pmu *spe_pmu) { @@ -1149,6 +1170,8 @@ static int arm_spe_pmu_irq_probe(struct arm_spe_pmu *spe_pmu) } spe_pmu->irq = irq; + arm_spe_populate_kvm_info(spe_pmu); + return 0; } diff --git a/include/kvm/arm_spe.h b/include/kvm/arm_spe.h index d1f3c564dfd0..9c65130d726d 100644 --- a/include/kvm/arm_spe.h +++ b/include/kvm/arm_spe.h @@ -17,6 +17,12 @@ struct kvm_spe { bool irq_level; }; +struct arm_spe_kvm_info { + int physical_irq; +}; + +struct arm_spe_kvm_info *arm_spe_get_kvm_info(void); + #ifdef CONFIG_KVM_ARM_SPE #define kvm_arm_spe_v1_ready(v) ((v)->arch.spe.ready) #define kvm_arm_spe_irq_initialized(v) \ -- 2.21.0 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm