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 65490C55182 for ; Mon, 3 Aug 2026 13:47:16 +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=eazYZp0fl5gOv2055RbbjKKBFnOeFCsoHy6lv3nOdQA=; b=XjlNAwoAcHLy9ff4AQKJUqeTuP DINFfJ+0nasJzyBBvIUS4DVRls2IImJ6pECLYZ8VLF4+vjiiXCQ1t5FxfNbUDitbl6oTdyuATagNy 8s8V2xkFb7kIs3kpsjrsebzX6sQcK9f1jFUBZyyIYqowHHMPqFd+FewnwA3K7/dfS6JRevhu+I0yq t33zcmSjGjSCv1Dv6CFmBuKC0aF77Aq72Yl2S3up5e1c3NUUrTOl5FOxU39K/dOYv53sSLUG5nqq5 rBTzrxNP7hZcVgN368tKzNxkVR7c28ZVn89zyLjpkB1p4mIY4+uFCf53+mvNHvzxMR6TOy3W1tn84 CeDBE60Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wqt0X-0000000HELh-44Xc; Mon, 03 Aug 2026 13:47:09 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wqt0V-0000000HEJ0-3ADF for linux-arm-kernel@lists.infradead.org; Mon, 03 Aug 2026 13:47:09 +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 B0C2F1476; Mon, 3 Aug 2026 06:47:02 -0700 (PDT) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.25.28]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 42F073F66F; Mon, 3 Aug 2026 06:47:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1785764826; bh=f5XF4TndoxoVxH50VEJOC2RYRGtrrvhd8+1pRFIhR/0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fJKmpKXhuohGrp+3530yeKrJT8csfLjS8y+WM81FheaAhbBObS+HTTmpyOPHsyN/Q lxjnqi59afiuuWgqyqp8XMuWOTxf8nVkgBF7I31tYQNp5KgYNh1VqpduBnXt8VlHOu OrhjHSsvfZbniqZnMDiulGx9pVTcoAk23iHUyph8= 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 Pieralisi , Steven Price Subject: [PATCH v16 36/45] KVM: arm64: CCA: Allow checking SVE on VM instance Date: Mon, 3 Aug 2026 14:43:52 +0100 Message-ID: <20260803134403.80630-37-steven.price@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260803134403.80630-1-steven.price@arm.com> References: <20260803134403.80630-1-steven.price@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260803_064707_885721_BF31F8A9 X-CRM114-Status: GOOD ( 10.06 ) 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 0fb685004d5c..13933f0e555d 100644 --- a/arch/arm64/include/asm/kvm_rmi.h +++ b/arch/arm64/include/asm/kvm_rmi.h @@ -98,6 +98,8 @@ struct realm_rec { void kvm_init_rmi(void); u32 kvm_rmm_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 96e536d2dda8..3242108be7c5 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -151,6 +151,8 @@ static bool kvm_realm_ext_allowed(long ext) case KVM_CAP_ARM_RMI: case KVM_CAP_SYNC_MMU: 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 904df7c7245d..0d46768022df 100644 --- a/arch/arm64/kvm/rmi.c +++ b/arch/arm64/kvm/rmi.c @@ -26,6 +26,11 @@ static bool rmi_has_feature(int reg, unsigned long feature) return !!u64_get_bits(rmi_feat_reg(reg), feature); } +bool kvm_rmi_supports_sve(void) +{ + return rmi_has_feature(0, RMI_FEATURE_REGISTER_0_SVE); +} + u32 kvm_rmm_ipa_limit(void) { return u64_get_bits(rmi_feat_reg(0), RMI_FEATURE_REGISTER_0_S2SZ); -- 2.43.0