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 8F325D6552C for ; Wed, 17 Dec 2025 10:14:39 +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=NK/7x8OJTP1Ou6/LmQQ7UJ/utX5dh0TaiSojaZ85fnk=; b=k8naigNZXJXSrR+qSCjXeJS2Ry goBP/qCpBaMG7GmJpe35ZTlm6OZvwv9G3b4vByopIEqU06DtJeMlteKJwO9yMTdKS9CctxXdGFYA/ wXB1OOoxPY4/KmOBzGhKklra7OeFcUOaMBz89VZ3+Ycfr21+KMD6VDv3S7y4psnHwlop4stVRLij6 y9tQYmkNDRoTEImdYaE8+PrBnBjCHmz9cRTCy6CN2O8Keun6+1WNxU5sHMl6Rr7GnnlKBzz00VxQv 4NUAZu725ViUEMIE2m6zsUlaR/Z0vQT8sgoA/Cjlu22f5PoyOn4K04IjQP1jCGL0j2AUSrKOd59nY 4HivFp4A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vVoYF-00000006YL8-0byv; Wed, 17 Dec 2025 10:14:35 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vVoY2-00000006Y8L-2o10 for linux-arm-kernel@lists.infradead.org; Wed, 17 Dec 2025 10:14:33 +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 AF2FD1688; Wed, 17 Dec 2025 02:14:14 -0800 (PST) Received: from e122027.arm.com (unknown [10.57.45.201]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 5AB873F73B; Wed, 17 Dec 2025 02:14:17 -0800 (PST) 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 v12 32/46] arm64: RMI: Allow checking SVE on VM instance Date: Wed, 17 Dec 2025 10:11:09 +0000 Message-ID: <20251217101125.91098-33-steven.price@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251217101125.91098-1-steven.price@arm.com> References: <20251217101125.91098-1-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-20251217_021422_794899_3D5C49FA X-CRM114-Status: UNSURE ( 8.30 ) 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 | 10 ++++++++++ 3 files changed, 14 insertions(+) diff --git a/arch/arm64/include/asm/kvm_rmi.h b/arch/arm64/include/asm/kvm_rmi.h index 77da297ca09d..82280c138935 100644 --- a/arch/arm64/include/asm/kvm_rmi.h +++ b/arch/arm64/include/asm/kvm_rmi.h @@ -89,6 +89,8 @@ void kvm_init_rmi(void); u32 kvm_realm_ipa_limit(void); u32 kvm_realm_vgic_nr_lr(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 403f9119543e..f8255de92902 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -342,6 +342,8 @@ 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 5f50566c701d..7ef5d7f48d0b 100644 --- a/arch/arm64/kvm/rmi.c +++ b/arch/arm64/kvm/rmi.c @@ -33,6 +33,16 @@ static inline unsigned long rmi_rtt_level_mapsize(int level) return (1UL << RMM_RTT_LEVEL_SHIFT(level)); } +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_EN); +} + static int rmi_check_version(void) { struct arm_smccc_res res; -- 2.43.0