From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3B5A327470; Thu, 12 Mar 2026 08:01:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773302519; cv=none; b=Q5pSIOiClWCGMYzQ3AiZu+IaYIErBfHN+6VdXjtwQYi3/Sy14DGLzSMQcqaCwj0UO9S1onLhvDl45WNo+XA+2j0NXkRLB2ZTfzA2krXfi0b1Mq7Q0OwKu7hcKP7GA8IJw8Tjq5BnJ868JkkMRmFgD46ik+oREqzdGtkF+6tliKY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773302519; c=relaxed/simple; bh=u+K2YX0UiSGjqu/03TsV46CS2J8/TdkIpbUuur3YNrI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=P4OMKhj41NyBgB1s73oDm4cx0c6N6XrhE81ZhgSTEhfbJqWd2mhGYkfPe/KIIt8zFWvjj9GYGN58B4RzLKRiRTTmpgSrmFJ164TaSyjvEOLREvYxo5tZnyYgovF60/Hew76Aev2W1ar4ewLA85BhbXtzjNZfz0QjP74LVm7RYsI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Vb82oAZQ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Vb82oAZQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AD661C116C6; Thu, 12 Mar 2026 08:01:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773302518; bh=u+K2YX0UiSGjqu/03TsV46CS2J8/TdkIpbUuur3YNrI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Vb82oAZQB5riuIp6fPLoLpOePoCwPydEF1xFAVupqMWfuEQP0NvsxQIC6ZS3hIulO 827rgOsl/s4E5/l49GFccCO/LlvHivBjgkq3zgfnYCgpuSQiu7aVceFaw9YY+VD6Zb KW50EqulVzvveWrVjPO90feb+l1eV2A3/7ZITBV4zngj5bkspJqqimawN4jkMM1GZ7 OtLo2/R7vept85hSX5SaGWjXzILwV/Uyr031CLBZkMLn8vYTvudhYe400Nfutj+jYd zfQ48riBOWQHt+4T8W0o1DnEJsyvq/unfEzR8JtMhPeanEQeWDFMR3XeNdgY1NUGv2 HtfMWnQmXHPXA== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, "Aneesh Kumar K.V (Arm)" , Marc Zyngier , Catalin Marinas , Will Deacon , Jonathan Cameron , Jason Gunthorpe , Dan Williams , Alexey Kardashevskiy , Samuel Ortiz , Xu Yilun , Suzuki K Poulose , Steven Price Subject: [RFC PATCH v3 01/10] KVM: arm64: RMI: Add and export kvm_has_da_feature helper Date: Thu, 12 Mar 2026 13:31:20 +0530 Message-ID: <20260312080129.3483585-2-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260312080129.3483585-1-aneesh.kumar@kernel.org> References: <20260312080129.3483585-1-aneesh.kumar@kernel.org> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add kvm_has_da_feature() helper for use in later patches. Update reserved fields based on Alp17 spec. Cc: Marc Zyngier Cc: Catalin Marinas Cc: Will Deacon Cc: Jonathan Cameron Cc: Jason Gunthorpe Cc: Dan Williams Cc: Alexey Kardashevskiy Cc: Samuel Ortiz Cc: Xu Yilun Cc: Suzuki K Poulose Cc: Steven Price Signed-off-by: Aneesh Kumar K.V (Arm) --- arch/arm64/include/asm/kvm_rmi.h | 1 + arch/arm64/include/asm/rmi_smc.h | 3 ++- arch/arm64/kvm/rmi.c | 6 ++++++ 3 files changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_rmi.h b/arch/arm64/include/asm/kvm_rmi.h index 1b2cdaac6c50..a967061af6ed 100644 --- a/arch/arm64/include/asm/kvm_rmi.h +++ b/arch/arm64/include/asm/kvm_rmi.h @@ -90,6 +90,7 @@ u32 kvm_realm_ipa_limit(void); u32 kvm_realm_vgic_nr_lr(void); u8 kvm_realm_max_pmu_counters(void); unsigned int kvm_realm_sve_max_vl(void); +bool kvm_has_da_feature(void); u64 kvm_realm_reset_id_aa64dfr0_el1(const struct kvm_vcpu *vcpu, u64 val); diff --git a/arch/arm64/include/asm/rmi_smc.h b/arch/arm64/include/asm/rmi_smc.h index 1000368f1bca..f6f786bfb9c9 100644 --- a/arch/arm64/include/asm/rmi_smc.h +++ b/arch/arm64/include/asm/rmi_smc.h @@ -86,7 +86,8 @@ enum rmi_ripas { #define RMI_FEATURE_REGISTER_0_HASH_SHA_512 BIT(33) #define RMI_FEATURE_REGISTER_0_GICV3_NUM_LRS GENMASK(37, 34) #define RMI_FEATURE_REGISTER_0_MAX_RECS_ORDER GENMASK(41, 38) -#define RMI_FEATURE_REGISTER_0_Reserved GENMASK(63, 42) +#define RMI_FEATURE_REGISTER_0_DA BIT(42) +#define RMI_FEATURE_REGISTER_0_Reserved GENMASK(63, 61) #define RMI_REALM_PARAM_FLAG_LPA2 BIT(0) #define RMI_REALM_PARAM_FLAG_SVE BIT(1) diff --git a/arch/arm64/kvm/rmi.c b/arch/arm64/kvm/rmi.c index 478a73e0b35a..08f3d2362dfd 100644 --- a/arch/arm64/kvm/rmi.c +++ b/arch/arm64/kvm/rmi.c @@ -1738,6 +1738,12 @@ int kvm_init_realm_vm(struct kvm *kvm) return 0; } +bool kvm_has_da_feature(void) +{ + return rmi_has_feature(RMI_FEATURE_REGISTER_0_DA); +} +EXPORT_SYMBOL_GPL(kvm_has_da_feature); + void kvm_init_rmi(void) { /* Only 4k page size on the host is supported */ -- 2.43.0