From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 16D77346774; Wed, 13 May 2026 13:21:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778678499; cv=none; b=c3YWuRM3IXBYQ4Wwe+TgsENJHBYze2/moimZariop8/z7CzdI7SRnf7p66Kk7nZ4FoOEBvgI1lfZpacw67MBeSyWRlqruid3z1DUPveJgafSd6n0HRp4WjyPfqIsHxonLdXcviHA8/PmUaWMbkO8VQQDH+sNV1YHWMIKT3fRJXk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778678499; c=relaxed/simple; bh=gj/SxJCYuo83sAJEaxzquUglOknYrph2SnKFB1yTzIM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YBxmTQH30QnzlCxhw4LONyv9CCGgqQvyLagP768cbc05kmfKED6zqyxLZnT3MMI6iyXPkH2CyXHJE/WYgBPFGd0gjH6wHFoGDXkB93g6fRBq0eeB60ACcKJW1i6CxvWLkxOWaJaCfYbruY3Q50PeQa0HFYew/TG/Pwv4yFuvDaE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=abBTmRT3; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="abBTmRT3" 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 560DC302D; Wed, 13 May 2026 06:21:31 -0700 (PDT) Received: from e122027.arm.com (unknown [10.57.68.187]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6203A3F836; Wed, 13 May 2026 06:21:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1778678496; bh=gj/SxJCYuo83sAJEaxzquUglOknYrph2SnKFB1yTzIM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=abBTmRT3URGq7DVjfR8oas1/IEOfpujDkFviDh5RiYdEsBI3rf0oM2TwycVHPAe0v NOC1qnSvZDXLRV4qaEJaPeVrDCnm3oLpuhP9n562xpZWtsYJztdyNi7ej3L21qnCOA PKg7IyLyiys8f0hoYpwoQEq8NE2lsI0IKittN/20= 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 , WeiLin.Chang@arm.com, Lorenzo.Pieralisi2@arm.com, Steven Price Subject: [PATCH v14 36/44] arm64: RMI: Allow checking SVE on VM instance Date: Wed, 13 May 2026 14:17:44 +0100 Message-ID: <20260513131757.116630-37-steven.price@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260513131757.116630-1-steven.price@arm.com> References: <20260513131757.116630-1-steven.price@arm.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 eacf82a7467d..d641748b5306 100644 --- a/arch/arm64/include/asm/kvm_rmi.h +++ b/arch/arm64/include/asm/kvm_rmi.h @@ -79,6 +79,8 @@ struct realm_rec { void kvm_init_rmi(void); u32 kvm_realm_ipa_limit(void); +bool kvm_rmi_supports_sve(void); + int kvm_init_realm(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 495082e601a9..aacbeb524b6a 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -148,6 +148,8 @@ 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 2b03e962ee41..678d775aa1c7 100644 --- a/arch/arm64/kvm/rmi.c +++ b/arch/arm64/kvm/rmi.c @@ -25,6 +25,11 @@ 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); +} + u32 kvm_realm_ipa_limit(void) { return u64_get_bits(rmm_feat_reg0, RMI_FEATURE_REGISTER_0_S2SZ); -- 2.43.0