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 4E0B626CE1C; Mon, 28 Jul 2025 13:53:42 +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=1753710824; cv=none; b=P8OeezRjkrr3wzeJ9a++Nqx4zGKQJtl+NwRgGa29VsNQt5fMIASQkzQfm9Vo4NABvcIZLWVqgY9547qbORt3qGzVAr6bBVXUNsAQiic829d/UrSe7MLKtb9iaJ77QrqvfXsXD2jSHkqGS7HeBi1h4wosXZ7VWylIkdXpQJWhRCI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753710824; c=relaxed/simple; bh=b8DNZd0OWQO+/qyBhIEURTzrRcRTx4S5avd9jivd7EU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hOGmPR1caHcHzarFzAEYpH3g9Nf4o5WiKtNG8EvA56Mwcieon4hUksDnQvH8jfTJpaLBN8OqRhdB1xJQgzqzYVtVsx7EgAd04X1/Od8ERwAEONEjlCy9frAtNdTcblQHXoUr+Eg1XUmb/ZfKWt4LEaUs0lWs/0ekvNBPLXhmtfA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=F13jPxay; 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="F13jPxay" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3101FC4CEE7; Mon, 28 Jul 2025 13:53:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753710822; bh=b8DNZd0OWQO+/qyBhIEURTzrRcRTx4S5avd9jivd7EU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F13jPxayOoMzgp7VKZEdViJybGfxuLkSHJUCPgTuWQJ0i+CLH33v+qmwcZJUi8lNT Q1RtRnDhuxiqteYRDQAmCJE9bhpkyhDmetlhujeaP4VHVfS5/3+seo0w99SRxy32Ql O/38UqmGE7syHkqUW2JLox1WdLGknXnhzFsPL80PGhfbpp7PpGAOQrqiZ4u2ZkKl8N QeZ4BzZkzNYEnvdyI+IhhfX1+Xa7qG7LFYLUN0zsxIebsekBqwXUfAc2NUrSRI2tHp w7zxhSFR0mF+5N7HwdyU4ZpuerB0kLeUg0xgQb10HKxqN8hwwABigryOPDnQ5AyZQ1 LXqmvqfoDoeAw== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, aik@amd.com, lukas@wunner.de, Samuel Ortiz , Xu Yilun , Jason Gunthorpe , Suzuki K Poulose , Steven Price , Catalin Marinas , Marc Zyngier , Will Deacon , Oliver Upton , "Aneesh Kumar K.V (Arm)" Subject: [RFC PATCH v1 11/38] KVM: arm64: CCA: register host tsm platform device Date: Mon, 28 Jul 2025 19:21:48 +0530 Message-ID: <20250728135216.48084-12-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250728135216.48084-1-aneesh.kumar@kernel.org> References: <20250728135216.48084-1-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 Register a platform device if the CCA DA feature is supported. A driver for this platform device will further drive the CCA DA workflow. Signed-off-by: Aneesh Kumar K.V (Arm) --- arch/arm64/include/asm/rmi_smc.h | 3 +++ arch/arm64/kvm/rme.c | 16 ++++++++++++++++ 2 files changed, 19 insertions(+) diff --git a/arch/arm64/include/asm/rmi_smc.h b/arch/arm64/include/asm/rmi_smc.h index 504009a42035..42708d500048 100644 --- a/arch/arm64/include/asm/rmi_smc.h +++ b/arch/arm64/include/asm/rmi_smc.h @@ -12,6 +12,8 @@ #include +#define RMI_DEV_NAME "arm-rmi-dev" + #define SMC_RMI_CALL(func) \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ ARM_SMCCC_SMC_64, \ @@ -87,6 +89,7 @@ enum rmi_ripas { #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_REALM_PARAM_FLAG_LPA2 BIT(0) #define RMI_REALM_PARAM_FLAG_SVE BIT(1) diff --git a/arch/arm64/kvm/rme.c b/arch/arm64/kvm/rme.c index ec8093ec2da3..d1c147aba2ed 100644 --- a/arch/arm64/kvm/rme.c +++ b/arch/arm64/kvm/rme.c @@ -4,6 +4,7 @@ */ #include +#include #include #include @@ -1724,6 +1725,18 @@ int kvm_init_realm_vm(struct kvm *kvm) return 0; } +static struct platform_device cca_host_dev = { + .name = RMI_DEV_NAME, + .id = PLATFORM_DEVID_NONE +}; + +static void rmm_tsm_init(void) +{ + if (!platform_device_register(&cca_host_dev)) + pr_info("CCA host DA platform device initialized.\n"); + +} + void kvm_init_rme(void) { if (PAGE_SIZE != SZ_4K) @@ -1737,6 +1750,9 @@ void kvm_init_rme(void) if (WARN_ON(rmi_features(0, &rmm_feat_reg0))) return; + if (rme_has_feature(RMI_FEATURE_REGISTER_0_DA)) + rmm_tsm_init(); + if (rme_vmid_init()) return; -- 2.43.0