From patchwork Wed Apr 16 13:41:50 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 14054082 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 1BFD5C369C4 for ; Wed, 16 Apr 2025 14:38:17 +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=M4MwWs4dde4NSZlWv1OrwtVKXODny7UtjgyICxBuMaM=; b=zRDsshn45XdgX5kLx168Wk6Fee FvfwFoDyeb5KBDHv20xa8Wqi+SpHLjTUR2HHdmQrac+vGiIvdVirA41RzPKvFRkS33gUUEo05NDc/ +tx9YdMcl/KjZ1oOSWmFmXR3ZJw5DohEGih+J0EFCEKJJHJecIeRnh5yPV8NdvF1BRbH/pAVVzUn+ lUbw4BCUPsMsbcCzYpMqlHsmuObB+Mq5+qDhaV2NiPucnN2pePI2Y4ljIFNfVAlb0IYQ94IHNs1Hi uG6xPh5/hVa9aLwGgPZ7PnUmajeg1+fVZwxmprVSkZjS/4EoR7vetz08qPe2wyRxKDHRA2abnioKe +9hfFT/g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1u53tu-00000009v9w-1F5K; Wed, 16 Apr 2025 14:38:06 +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 1u535B-00000009hyU-1KoG for linux-arm-kernel@lists.infradead.org; Wed, 16 Apr 2025 13:45:42 +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 DA4DF1E7D; Wed, 16 Apr 2025 06:45:38 -0700 (PDT) Received: from e122027.arm.com (unknown [10.57.90.52]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4FC2D3F59E; Wed, 16 Apr 2025 06:45:36 -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" , Steven Price Subject: [PATCH v8 28/43] arm64: RME: Allow checking SVE on VM instance Date: Wed, 16 Apr 2025 14:41:50 +0100 Message-ID: <20250416134208.383984-29-steven.price@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250416134208.383984-1-steven.price@arm.com> References: <20250416134208.383984-1-steven.price@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250416_064541_396576_90A4C881 X-CRM114-Status: GOOD ( 10.77 ) 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 --- arch/arm64/include/asm/kvm_rme.h | 2 ++ arch/arm64/kvm/arm.c | 5 ++++- arch/arm64/kvm/rme.c | 5 +++++ 3 files changed, 11 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_rme.h b/arch/arm64/include/asm/kvm_rme.h index 7000fa1227d0..f786fd978cf6 100644 --- a/arch/arm64/include/asm/kvm_rme.h +++ b/arch/arm64/include/asm/kvm_rme.h @@ -94,6 +94,8 @@ void kvm_init_rme(void); u32 kvm_realm_ipa_limit(void); u32 kvm_realm_vgic_nr_lr(void); +bool kvm_rme_supports_sve(void); + int kvm_realm_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap); int kvm_init_realm_vm(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 97c5efbe47a6..850708db660e 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -420,7 +420,10 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) r = get_kvm_ipa_limit(); break; case KVM_CAP_ARM_SVE: - r = system_supports_sve(); + if (kvm_is_realm(kvm)) + r = kvm_rme_supports_sve(); + else + r = system_supports_sve(); break; case KVM_CAP_ARM_PTRAUTH_ADDRESS: case KVM_CAP_ARM_PTRAUTH_GENERIC: diff --git a/arch/arm64/kvm/rme.c b/arch/arm64/kvm/rme.c index 70244e01c161..a89bd1c29e99 100644 --- a/arch/arm64/kvm/rme.c +++ b/arch/arm64/kvm/rme.c @@ -38,6 +38,11 @@ static bool rme_has_feature(unsigned long feature) return !!u64_get_bits(rmm_feat_reg0, feature); } +bool kvm_rme_supports_sve(void) +{ + return rme_has_feature(RMI_FEATURE_REGISTER_0_SVE_EN); +} + static int rmi_check_version(void) { struct arm_smccc_res res;