From patchwork Tue Jan 31 09:24:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13122657 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EC816C636CD for ; Tue, 31 Jan 2023 09:41:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232439AbjAaJlg (ORCPT ); Tue, 31 Jan 2023 04:41:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40230 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231157AbjAaJlf (ORCPT ); Tue, 31 Jan 2023 04:41:35 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 418B97DB2 for ; Tue, 31 Jan 2023 01:41:25 -0800 (PST) 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 sin.source.kernel.org (Postfix) with ESMTPS id 8A78ACE1CCB for ; Tue, 31 Jan 2023 09:41:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AE505C433D2; Tue, 31 Jan 2023 09:41:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1675158081; bh=91p16N15uIviVqlWpa+2xR/bZv/r5Wt0gGrieUD+SGs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZTbDI2RxuZnQ1Gvup8ko3Ra5tWSWJGFDd52nFr5CI9Mq0HibGwiCjgpNRBOhVxLzI Hpt8GJ1stT6ChdRCZGH3Ryl98sB+oR7wGDGi53yQOz5dg9kMVEXdQGhUsyUAi/IAsc kV1y+7Kmm03pJhYLaQEh0Dyxiu56tlJ4BTngqS0Sx7xGvn+CDEoV1txt/Bd7QCOB/q wMaW58bP8ctlBRq8DkJN7X5Vlc3MkFj4TjbLdk74yoiSIH647J+qMi13tc3NaCqUo3 dlnppf9v5yUzK/PgFizVEJlP/+25vGhpI2hEBjgSEbyYQQxiMsCLL9MziaKQi+nZGk N9l+JHK/Mc0XA== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.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 1pMmtt-0067U2-FQ; Tue, 31 Jan 2023 09:26:01 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Alexandru Elisei , Andre Przywara , Chase Conklin , Christoffer Dall , Ganapatrao Kulkarni , Jintack Lim , Russell King , James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu Subject: [PATCH v8 54/69] KVM: arm64: nv: Allow userspace to request KVM_ARM_VCPU_NESTED_VIRT Date: Tue, 31 Jan 2023 09:24:49 +0000 Message-Id: <20230131092504.2880505-55-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230131092504.2880505-1-maz@kernel.org> References: <20230131092504.2880505-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, alexandru.elisei@arm.com, andre.przywara@arm.com, chase.conklin@arm.com, christoffer.dall@arm.com, gankulkarni@os.amperecomputing.com, jintack@cs.columbia.edu, rmk+kernel@armlinux.org.uk, james.morse@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Since we're (almost) feature complete, let's allow userspace to request KVM_ARM_VCPU_NESTED_VIRT by bumping the KVM_VCPU_MAX_FEATURES up. We also now advertise the feature to userspace with a new capability. It's going to be great... Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_host.h | 2 +- arch/arm64/kvm/arm.c | 3 +++ include/uapi/linux/kvm.h | 1 + 3 files changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 5db9e74b86f6..a1fc3b893af8 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -37,7 +37,7 @@ #define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS -#define KVM_VCPU_MAX_FEATURES 7 +#define KVM_VCPU_MAX_FEATURES 8 #define KVM_REQ_SLEEP \ KVM_ARCH_REQ_FLAGS(0, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 505cb72d8535..bfcf6db27448 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -269,6 +269,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_ARM_EL1_32BIT: r = cpus_have_const_cap(ARM64_HAS_32BIT_EL1); break; + case KVM_CAP_ARM_EL2: + r = cpus_have_const_cap(ARM64_HAS_NESTED_VIRT); + break; case KVM_CAP_GUEST_DEBUG_HW_BPS: r = get_num_brps(); break; diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 55155e262646..573fa03bb002 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1175,6 +1175,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_DIRTY_LOG_RING_ACQ_REL 223 #define KVM_CAP_S390_PROTECTED_ASYNC_DISABLE 224 #define KVM_CAP_DIRTY_LOG_RING_WITH_BITMAP 225 +#define KVM_CAP_ARM_EL2 226 #ifdef KVM_CAP_IRQ_ROUTING