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 32BEE43990D; Mon, 3 Aug 2026 13:47:07 +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=1785764828; cv=none; b=l2UruXuxwQMs1TkYBnTJDgZeSJ3HwMnBkLm+nurE3KjbO/ONg8clX9rI5CDVAZKWz5qpfptiojRP54q5un5Y2ivAcjAHfVM2RPdWkkB9bGewUiDw7K1EZ/p3Pz6psAhER+xVn7mKtBu74joA836AZm1R9ggYI5PjVJpk4baaT5g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785764828; c=relaxed/simple; bh=f5XF4TndoxoVxH50VEJOC2RYRGtrrvhd8+1pRFIhR/0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GMCIODAQu1/clUMS9WgQ5TqKCMVI9pJ+GOe1MZVy3hoWqlWp1hqesnchuiK1ew+/NEOAjWK4zfST0P4cZAMr4biMY3p0rC/4tn5snfvaLCUnS7ihlFQ3p9KJ7dj+x9Bkrd0zKmpyk0drFANLukkbyHYMRrG77d7cvF/nx21mmX0= 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=fJKmpKXh; 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="fJKmpKXh" 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> 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 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