From patchwork Mon Sep 21 13:08:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 11789743 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 0980D6CB for ; Mon, 21 Sep 2020 13:09:49 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B06E2218AC for ; Mon, 21 Sep 2020 13:09:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="l1Be5NrR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B06E2218AC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=nANwREHABnHhpAldjzQHC8MFWNgTqn99onS3IOEAg7A=; b=l1Be5NrRuqfv4pPLtu1f+1Iea dan0PY5K58VIkcGdkfdGEWvsbyU65bQGy12984q5ZE9gIXAeuL/7IzCJSH7qi7Na+Ii1+4kp5XRbb cljVCUhpr34LXRB4GSIrhTnme6Op8pzKl88ZtSE8fFC0ZSewXMHkwMld06pgYSbjrYK4XM5hy1GIS 3TtIVKiOtb8Z3OLJeHZB5Pd7fniz3IqQokU9iypFydFXKj10J/hFPpPaVQ5kFOsim9+Aw7B7slfiG O9oZASPuF1D/dlNNTCR8wjEjVwPLUbCEAkkRwH6hG+jxiYYhHpOz4V04VdOvJACk0jLPNcswR5rvw Yl5RN2Vaw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kKLY7-0004C5-6D; Mon, 21 Sep 2020 13:08:07 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kKLXz-0004Ah-Sv for linux-arm-kernel@lists.infradead.org; Mon, 21 Sep 2020 13:08:00 +0000 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 6BB271045; Mon, 21 Sep 2020 06:07:58 -0700 (PDT) Received: from monolith.localdoman (unknown [10.37.8.129]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4F6983F73B; Mon, 21 Sep 2020 06:07:57 -0700 (PDT) From: Alexandru Elisei To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Subject: [PATCH 1/2] KVM: arm64: Add undocumented return values for PMU device control group Date: Mon, 21 Sep 2020 14:08:37 +0100 Message-Id: <20200921130838.37296-2-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200921130838.37296-1-alexandru.elisei@arm.com> References: <20200921130838.37296-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200921_090759_979176_854143C1 X-CRM114-Status: GOOD ( 14.62 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: maz@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org KVM_ARM_VCPU_PMU_V3_IRQ returns -EFAULT if get_user() fails when reading the interrupt number from kvm_device_attr.addr. KVM_ARM_VCPU_PMU_V3_INIT returns the error value from kvm_vgic_set_owner(). kvm_arm_pmu_v3_init() checks that the vgic has been initialized and the interrupt number is valid, but kvm_vgic_set_owner() can still return the error code -EEXIST if another device has already claimed the interrupt. Signed-off-by: Alexandru Elisei Reviewed-by: Andrew Jones --- Documentation/virt/kvm/devices/vcpu.rst | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/virt/kvm/devices/vcpu.rst b/Documentation/virt/kvm/devices/vcpu.rst index ca374d3fe085..96d6cf77cb1e 100644 --- a/Documentation/virt/kvm/devices/vcpu.rst +++ b/Documentation/virt/kvm/devices/vcpu.rst @@ -25,6 +25,7 @@ Returns: ======= ======================================================== -EBUSY The PMU overflow interrupt is already set + -EFAULT Error reading interrupt number -ENXIO The overflow interrupt not set when attempting to get it -ENODEV PMUv3 not supported -EINVAL Invalid PMU overflow interrupt number supplied or @@ -45,6 +46,7 @@ all vcpus, while as an SPI it must be a separate number per vcpu. Returns: ======= ====================================================== + -EEXIST Interrupt number already used -ENODEV PMUv3 not supported or GIC not initialized -ENXIO PMUv3 not properly configured or in-kernel irqchip not configured as required prior to calling this attribute