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 1AB1148AE28; Wed, 15 Jul 2026 14:31:13 +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=1784125877; cv=none; b=Vjqbq7mOLVXAv9Zo0qxIrfWnSzstjcepy04Y0TGZQ5ihFqoRIpNbWOEnD62AVpQNekUyiu8ipgF3wvq2O2TRgESUa4t8stNqKcGTsPcGM18CIrc9c/WDJ2VpY6knk8QyKJyVV4RbwZI2DpRRY36a02M3IOBdS/vWJ6HcC7IANPs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784125877; c=relaxed/simple; bh=5xUM0oOtKd9m3NaVfQB4WcOYjf14OgtuIZ8nBG5ODJ4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=d6Ag+YbAcY1309NQP8zHtux5mpZaS8pfEcoNtNA33Nn9GQ80stOiu8sS8M5TgjuWhNNQOSa7znGh/cmBAol5L0jXF3qk2Qmgcxl3LrmNnNeKZ7ZaldCGAFyPHo2G17UFiv7lGsCVqIfsEerCr854NwGUMGh4KtA+cboSqf4j074= 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=V0UIg7Ri; 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="V0UIg7Ri" 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 5944D1576; Wed, 15 Jul 2026 07:31:08 -0700 (PDT) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.25.27]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 963F43F7B4; Wed, 15 Jul 2026 07:31:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1784125872; bh=5xUM0oOtKd9m3NaVfQB4WcOYjf14OgtuIZ8nBG5ODJ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V0UIg7RicJYbfwbBFygke6dSHrm/S/IxA4/b4YvtmWahu8ekTcVxOAOPGiBh5Sbmy Rj6EIhaF6jaPnCIqvQ5ilx81PH26ij97JzgNNUar8/gtn4MLYeDOd6YKtcarDoDs4Q rXpCallJQbsijk/KqOiBqw2UzC9HK2Vx0IgIbU94= 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 v15 29/37] KVM: arm64: CCA: Allow checking SVE on VM instance Date: Wed, 15 Jul 2026 15:28:31 +0100 Message-ID: <20260715142841.80544-30-steven.price@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260715142841.80544-1-steven.price@arm.com> References: <20260715142841.80544-1-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 a9bb9aabee5d..7f0c059ac7cf 100644 --- a/arch/arm64/include/asm/kvm_rmi.h +++ b/arch/arm64/include/asm/kvm_rmi.h @@ -96,6 +96,8 @@ 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 4ad9462e9d47..aa7617e72e22 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 8fb6403893e8..2310f2b608a7 100644 --- a/arch/arm64/kvm/rmi.c +++ b/arch/arm64/kvm/rmi.c @@ -25,6 +25,11 @@ 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