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 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 0A3DBC43334 for ; Thu, 14 Jul 2022 15:38:37 +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:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=yU5/xMwwxSzHPvM0giTa7+5wTsEHHiFvpiMhtgO0lyk=; b=2jT3ycBPxxttRL +EebJNhEV+s1hs7N1Wg5AhgMwzf/wtBQ7RREpwFetCKsJrBZD8EOO1glDumoceGGr8dqT8pjMTtab WE3x6aEHrqnslkxP0GBWnTHoEIVT35Ps9Ojhui3ftr3+HH2wl0pv8VkwDqNvUxio7YmwXeO4gmyot jtoA9UbTjdaWAFovLk+25la8Iyd8sb0ovGiR50AkxsALarOzeTdOl/0rie6mfpnqXfWCVws17xEh5 M1RCi3VHm4/vVICbrjjme6KM/yQGViSb+BQslU+x3H4c+Ml1ukmXcDWRB+SLNlSsDTK+yt9TY9pdk jAkTxEMQQvnaUTMbrnVA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oC0uC-00Fmx5-4w; Thu, 14 Jul 2022 15:37:32 +0000 Received: from ams.source.kernel.org ([2604:1380:4601:e00::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oC0sA-00FliQ-NW for linux-arm-kernel@lists.infradead.org; Thu, 14 Jul 2022 15:35:28 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 3737AB82372; Thu, 14 Jul 2022 15:35:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BCC62C3411C; Thu, 14 Jul 2022 15:35:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1657812923; bh=ewFZDRbbTUSr1/RjHEhxuF5bx6bfhbtmusxOWTcVpCI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SsGdmmQxlag22n9+IC2c7Vq7/1EoxwUJ1bOrfTn1a7X5UfCaZlnu2y/H10lLUInnX YnIOt/dwIH9eHngc9UzTfmczDy7SFq2/hq14uC8syglUevYXLUeMKigSlfAKnwIZoU vWgVbKsc0saFqR4wWSgOkPcVolefTHP7of2+WDI75tP8e+wseBBDHz628QP9ockhDd kBSTMAyP5nJhLnxkZJrzmLpvG6Zi3vVjv7c/WnqOnhP7pxbTD/a/K20kFSUitECXUc NcryuXUnlX4I34KoiP4LH72quXV0pqZvRhNMqOfjJZ4domzY1Mp4VcQcfza6nvVf2G Xw4ixWVe+Y/HA== Received: from sofa.misterjones.org ([185.219.108.64] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1oC0dk-007UVL-LK; Thu, 14 Jul 2022 16:20:32 +0100 From: Marc Zyngier To: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: James Morse , Suzuki K Poulose , Alexandru Elisei , Oliver Upton , Reiji Watanabe , Schspa Shi , kernel-team@android.com Subject: [PATCH v2 17/20] KVM: arm64: vgic: Tidy-up calls to vgic_{get,set}_common_attr() Date: Thu, 14 Jul 2022 16:20:21 +0100 Message-Id: <20220714152024.1673368-18-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220714152024.1673368-1-maz@kernel.org> References: <20220714152024.1673368-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, oliver.upton@linux.dev, reijiw@google.com, schspa@gmail.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220714_083527_141190_24DD4D09 X-CRM114-Status: GOOD ( 18.09 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The userspace accessors have an early call to vgic_{get,set}_common_attr() that makes the code hard to follow. Move it to the default: clause of the decoding switch statement, which results in a nice cleanup. This requires us to move the handling of the pending table into the common handling, even if it is strictly a GICv3 feature (it has the benefit of keeping the whole control group handling in the same function). Also cleanup vgic_v3_{get,set}_attr() while we're at it, deduplicating the calls to vgic_v3_attr_regs_access(). Suggested-by: Reiji Watanabe Signed-off-by: Marc Zyngier --- arch/arm64/kvm/vgic/vgic-kvm-device.c | 78 +++++++++------------------ 1 file changed, 26 insertions(+), 52 deletions(-) diff --git a/arch/arm64/kvm/vgic/vgic-kvm-device.c b/arch/arm64/kvm/vgic/vgic-kvm-device.c index 011171dc41c5..edeac2380591 100644 --- a/arch/arm64/kvm/vgic/vgic-kvm-device.c +++ b/arch/arm64/kvm/vgic/vgic-kvm-device.c @@ -246,6 +246,24 @@ static int vgic_set_common_attr(struct kvm_device *dev, r = vgic_init(dev->kvm); mutex_unlock(&dev->kvm->lock); return r; + case KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES: + /* + * OK, this one isn't common at all, but we + * want to handle all control group attributes + * in a single place. + */ + if (vgic_check_type(dev->kvm, KVM_DEV_TYPE_ARM_VGIC_V3)) + return -ENXIO; + mutex_lock(&dev->kvm->lock); + + if (!lock_all_vcpus(dev->kvm)) { + mutex_unlock(&dev->kvm->lock); + return -EBUSY; + } + r = vgic_v3_save_pending_tables(dev->kvm); + unlock_all_vcpus(dev->kvm); + mutex_unlock(&dev->kvm->lock); + return r; } break; } @@ -427,37 +445,25 @@ static int vgic_v2_attr_regs_access(struct kvm_device *dev, static int vgic_v2_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { - int ret; - - ret = vgic_set_common_attr(dev, attr); - if (ret != -ENXIO) - return ret; - switch (attr->group) { case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: case KVM_DEV_ARM_VGIC_GRP_CPU_REGS: return vgic_v2_attr_regs_access(dev, attr, true); + default: + return vgic_set_common_attr(dev, attr); } - - return -ENXIO; } static int vgic_v2_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { - int ret; - - ret = vgic_get_common_attr(dev, attr); - if (ret != -ENXIO) - return ret; - switch (attr->group) { case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: case KVM_DEV_ARM_VGIC_GRP_CPU_REGS: return vgic_v2_attr_regs_access(dev, attr, false); + default: + return vgic_get_common_attr(dev, attr); } - - return -ENXIO; } static int vgic_v2_has_attr(struct kvm_device *dev, @@ -618,61 +624,29 @@ static int vgic_v3_attr_regs_access(struct kvm_device *dev, static int vgic_v3_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { - int ret; - - ret = vgic_set_common_attr(dev, attr); - if (ret != -ENXIO) - return ret; - switch (attr->group) { case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: case KVM_DEV_ARM_VGIC_GRP_REDIST_REGS: - return vgic_v3_attr_regs_access(dev, attr, true); case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: - return vgic_v3_attr_regs_access(dev, attr, true); case KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO: return vgic_v3_attr_regs_access(dev, attr, true); - case KVM_DEV_ARM_VGIC_GRP_CTRL: { - int ret; - - switch (attr->attr) { - case KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES: - mutex_lock(&dev->kvm->lock); - - if (!lock_all_vcpus(dev->kvm)) { - mutex_unlock(&dev->kvm->lock); - return -EBUSY; - } - ret = vgic_v3_save_pending_tables(dev->kvm); - unlock_all_vcpus(dev->kvm); - mutex_unlock(&dev->kvm->lock); - return ret; - } - break; - } + default: + return vgic_set_common_attr(dev, attr); } - return -ENXIO; } static int vgic_v3_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) { - int ret; - - ret = vgic_get_common_attr(dev, attr); - if (ret != -ENXIO) - return ret; - switch (attr->group) { case KVM_DEV_ARM_VGIC_GRP_DIST_REGS: case KVM_DEV_ARM_VGIC_GRP_REDIST_REGS: - return vgic_v3_attr_regs_access(dev, attr, false); case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS: - return vgic_v3_attr_regs_access(dev, attr, false); case KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO: return vgic_v3_attr_regs_access(dev, attr, false); + default: + return vgic_get_common_attr(dev, attr); } - return -ENXIO; } static int vgic_v3_has_attr(struct kvm_device *dev, -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel