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 8E639FED2E4 for ; Thu, 12 Mar 2026 08:02:09 +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=g97hWssFn4sWTqAvgPZaDkvAx9UyrHyXX93JyLOhQT0=; b=Ne1N4heoBOiH8n6awQFXMhEvvA T0qHd2Ru9RHWsMSD/n/YVyRuloUxfdAPTp4jAbltHWy/tIqVceavrkQlrOMX4Qxt8isVfE+zQpbZ5 XdIkg8XppCvZh4HfxARqZPWIWcYEbqP40v6fzmx/0YCukq1VeSfAQP2QO1pIbOpMiZsELLIIEYffz TfVIirLEQO3IzCHzHLwqFyS+xzGKzuFvICFa7Xdo8aT67aIXOVnwX4mJcYx/1r2YKNxTQ0K5Je3ij VhSgMKmtAWjh0gWrp7tKIymP4Vt0DWiY4+YBoPv43Fgmk2aALXmDGlF789JcDSzqhVB8d9yWtFQjS kloxR2PA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w0azb-0000000DZDd-0x8A; Thu, 12 Mar 2026 08:02:03 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w0azY-0000000DZCy-1FVt for linux-arm-kernel@lists.infradead.org; Thu, 12 Mar 2026 08:02:01 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 0CFBC404E5; Thu, 12 Mar 2026 08:01:59 +0000 (UTC) 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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260312_010200_386731_B30B6A3A X-CRM114-Status: GOOD ( 10.76 ) 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 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