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 E54AD103E19B for ; Wed, 18 Mar 2026 15:57:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=GZnoia0dP39bfnNvAU7EVfSpEAUul1c4RnLCozece3g=; b=1kE/7ZFUQHB4eZW3pu4oS5dCmm FdnbltGnaipZlT3v2EX5YxY62V7IBuim851DQvAcJY/L49JcXiG9SWbNQjqf9qfDBYp6234nkAqrR L0xoiyQ91PVgwC22aH7AXjz6YaeMFe9ky0HBT+qMHACEKb/FnfGlc/SHgcyOFxErCEybtHo4+sJw9 nVa1vEEoShgH9nftDFD7MogUh2/VmYAwHTjiVKuZ4Y+VtrYfrhA89HO4ysBDCA9GIrxxM/6vA6n8N 4RPtNDlwX/8bmiGmssdzO2ajuyWucWuJ3eYYn3alMOS1t0eANpfIYgtbN84fMJUSUlD7BIKLDrMsh YaS520zg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w2tGl-00000008qXr-3VFO; Wed, 18 Mar 2026 15:57:15 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w2tG9-00000008pr3-1n3F for linux-arm-kernel@bombadil.infradead.org; Wed, 18 Mar 2026 15:56:39 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=GZnoia0dP39bfnNvAU7EVfSpEAUul1c4RnLCozece3g=; b=j0LkOOfCUKQp+9LKtP1TKZzN9u POKgurBI+H4hKguaqaxjRwOhDgglmIe69CnJZZcR1F3mDKeyzd9okyBsRzAVpAI8u1xmPrTELC+32 l7SIi16O/xFwIkS7ZhR8iQ9LYC5/2kgoEZkVwqEYIyW/+AlGK3uIqmjjt5iQQfbj570x+d867bZJp eP/a6h/2CemS5Tg3xZe8KmL+fGRUr7V1aEyQpUMbeuNxnHOLYWh7Zf504NZ/OSLRkStZM3qAzmeg1 n9OX99PisIwi0/1K+nw1cLKSbKIOtmb6gPV0CPlEoEW601iivLPManooferu+C7jbkZxnqcYpmHDG IHCdd6FQ==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w2tG5-0000000Bdrd-3giq for linux-arm-kernel@lists.infradead.org; Wed, 18 Mar 2026 15:56:35 +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 7ACC1201B; Wed, 18 Mar 2026 08:56:26 -0700 (PDT) Received: from e122027.arm.com (unknown [10.57.61.122]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 333BE3F73B; Wed, 18 Mar 2026 08:56:29 -0700 (PDT) From: Steven Price To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Suzuki K Poulose , Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev, Ganapatrao Kulkarni , Gavin Shan , Shanker Donthineni , Alper Gun , "Aneesh Kumar K . V" , Emi Kisanuki , Vishal Annapurve , Steven Price Subject: [PATCH v13 35/48] arm64: RMI: Allow checking SVE on VM instance Date: Wed, 18 Mar 2026 15:53:59 +0000 Message-ID: <20260318155413.793430-36-steven.price@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260318155413.793430-1-steven.price@arm.com> References: <20260318155413.793430-1-steven.price@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260318_155634_324369_504FAD46 X-CRM114-Status: UNSURE ( 8.93 ) X-CRM114-Notice: Please train this message. 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Suzuki K Poulose Given we have different types of VMs supported, check the support for SVE for the given instance of the VM to accurately report the status. Signed-off-by: Suzuki K Poulose Signed-off-by: Steven Price Reviewed-by: Gavin Shan Reviewed-by: Joey Gouly --- Changes since v10: * RME->RMI renaming. * Adapt to move CAP check to kvm_realm_ext_allowed(). --- arch/arm64/include/asm/kvm_rmi.h | 2 ++ arch/arm64/kvm/arm.c | 2 ++ arch/arm64/kvm/rmi.c | 5 +++++ 3 files changed, 9 insertions(+) diff --git a/arch/arm64/include/asm/kvm_rmi.h b/arch/arm64/include/asm/kvm_rmi.h index 1ee5ed0f5ab2..d6cf87de099b 100644 --- a/arch/arm64/include/asm/kvm_rmi.h +++ b/arch/arm64/include/asm/kvm_rmi.h @@ -87,6 +87,8 @@ struct realm_rec { void kvm_init_rmi(void); u32 kvm_realm_ipa_limit(void); +bool kvm_rmi_supports_sve(void); + int kvm_init_realm_vm(struct kvm *kvm); int kvm_activate_realm(struct kvm *kvm); void kvm_destroy_realm(struct kvm *kvm); diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 7d92ddb06460..3e6f1e810921 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -388,6 +388,8 @@ static bool kvm_realm_ext_allowed(long ext) case KVM_CAP_ARM_PTRAUTH_GENERIC: case KVM_CAP_ARM_RMI: return true; + case KVM_CAP_ARM_SVE: + return kvm_rmi_supports_sve(); } return false; } diff --git a/arch/arm64/kvm/rmi.c b/arch/arm64/kvm/rmi.c index e56c8af2ad61..7cc6dc14d325 100644 --- a/arch/arm64/kvm/rmi.c +++ b/arch/arm64/kvm/rmi.c @@ -33,6 +33,11 @@ static bool rmi_has_feature(unsigned long feature) return !!u64_get_bits(rmm_feat_reg0, feature); } +bool kvm_rmi_supports_sve(void) +{ + return rmi_has_feature(RMI_FEATURE_REGISTER_0_SVE); +} + static int rmi_check_version(void) { struct arm_smccc_res res; -- 2.43.0