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 E3FE4FED2E4 for ; Thu, 12 Mar 2026 08:05:27 +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=2ad9x+j4Mk05jKvHZj6DMG/qFA0dUSg83cVlisavP0s=; b=37Hm6jc4MGbQRfslGmIXDUdYNo HljLb/OBtQLBXDGiRHa9mFzoLn/Sx9/GIeYLOR8FISVDKtMYT1s11Ezi1NIYiqa2LWUr/6K5Jylkg w/XXmqoYLk+T0VkP+JPycjUgb1osxH/PAWTiKoZXmtc6/ECVgMO1jCEbI5FN3YbPxUjPHlYbX532d JCxWi4UvvJ/JS8uJelBvqrjyny1pTemvbHGhI1hejzxDWNMdBXYpbHYLzpuMFBA2Y+lk8trdIYmKM 8k/fjI5fHltRt9Dw/GU741l+1hsmylxEB4aQ2rM5HNkDf345eKHwUV3AfiumGz9+3PGWfhK2x1bfT TPt2azXg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w0b2k-0000000DaQp-3wNw; Thu, 12 Mar 2026 08:05:19 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w0b2i-0000000DaPs-3Mhp for linux-arm-kernel@lists.infradead.org; Thu, 12 Mar 2026 08:05:16 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 2783F6014B; Thu, 12 Mar 2026 08:05:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57EF2C19424; Thu, 12 Mar 2026 08:05:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773302715; bh=Zug2KbC+qKpyPQFy5aZ3Snq91MpXjqLfX4iRpg+DcFU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Tu3KriESxpam7LaWZWZ71I3C9oSaaLmYWjY7TnTHc9tYehqRs99ZU2EVoCikCq0aY pO2hXD5lgOdZjVRXRf5ZPU9eKta2PUUbXI8LOJSCQa+Gk6aDZ7WvCERLNJ7MyBoSyu DKvU9vFp52Bc482JU9xeRs2rN3WmiYyQqFmyNVIA6rCWgfe2aowzo+BswwDLrBUA+n cp7vq6NcR5lfaIX0yy/p0UZJFG5BZ+1HYxKqwAcdyV5uK5/pRuyj7WJ2TGy7K96KW7 Hc1ZU09UGYvwfoEQ75sfGhNhvXccHeV8LTNkk/q4H5H0QOd/g+ulMt05bClOKBClHR JIXAXdiQonmUA== 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 04/11] coco: guest: arm64: Support guest-initiated TDI lock/unlock transitions Date: Thu, 12 Mar 2026 13:34:35 +0530 Message-ID: <20260312080442.3485633-5-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260312080442.3485633-1-aneesh.kumar@kernel.org> References: <20260312080442.3485633-1-aneesh.kumar@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 guest helpers to drive TDI state transitions through RHI: - cca_device_lock() -> RHI_DA_TDI_CONFIG_LOCKED - cca_device_unlock() -> RHI_DA_TDI_CONFIG_UNLOCKED Use these helpers in the PCI TSM lock/unlock callbacks so a successful lock path returns a live pci_tsm handle and unlock transitions the device back to unlocked state. 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) --- drivers/virt/coco/arm-cca-guest/Makefile | 2 +- drivers/virt/coco/arm-cca-guest/arm-cca.c | 9 ++++-- drivers/virt/coco/arm-cca-guest/rsi-da.c | 34 +++++++++++++++++++++++ drivers/virt/coco/arm-cca-guest/rsi-da.h | 2 ++ 4 files changed, 44 insertions(+), 3 deletions(-) create mode 100644 drivers/virt/coco/arm-cca-guest/rsi-da.c diff --git a/drivers/virt/coco/arm-cca-guest/Makefile b/drivers/virt/coco/arm-cca-guest/Makefile index 65c4cc52c154..11db7af095c9 100644 --- a/drivers/virt/coco/arm-cca-guest/Makefile +++ b/drivers/virt/coco/arm-cca-guest/Makefile @@ -2,4 +2,4 @@ obj-$(CONFIG_ARM_CCA_GUEST) += arm-cca-guest.o arm-cca-guest-y += arm-cca.o -arm-cca-guest-$(CONFIG_PCI_TSM) += rhi-da.o +arm-cca-guest-$(CONFIG_PCI_TSM) += rhi-da.o rsi-da.o diff --git a/drivers/virt/coco/arm-cca-guest/arm-cca.c b/drivers/virt/coco/arm-cca-guest/arm-cca.c index 07f74f67d22c..5e3a66315c70 100644 --- a/drivers/virt/coco/arm-cca-guest/arm-cca.c +++ b/drivers/virt/coco/arm-cca-guest/arm-cca.c @@ -211,14 +211,19 @@ static struct pci_tsm *cca_tsm_lock(struct tsm_dev *tsm_dev, struct pci_dev *pde if (ret) return ERR_PTR(ret); - /* For now always return an error */ - return ERR_PTR(-EIO); + ret = cca_device_lock(pdev); + if (ret) + return ERR_PTR(ret); + + return &no_free_ptr(cca_dsc)->pci.base_tsm; } static void cca_tsm_unlock(struct pci_tsm *tsm) { struct cca_guest_dsc *cca_dsc = to_cca_guest_dsc(tsm->pdev); + cca_device_unlock(tsm->pdev); + kfree(cca_dsc); } diff --git a/drivers/virt/coco/arm-cca-guest/rsi-da.c b/drivers/virt/coco/arm-cca-guest/rsi-da.c new file mode 100644 index 000000000000..2c3017933fb0 --- /dev/null +++ b/drivers/virt/coco/arm-cca-guest/rsi-da.c @@ -0,0 +1,34 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2025 ARM Ltd. + */ + +#include +#include + +#include "rsi-da.h" +#include "rhi-da.h" + +int cca_device_lock(struct pci_dev *pdev) +{ + int ret; + + ret = rhi_vdev_set_tdi_state(pdev, RHI_DA_TDI_CONFIG_LOCKED); + if (ret) { + pci_err(pdev, "failed to lock the device (%d)\n", ret); + return ret; + } + return 0; +} + +int cca_device_unlock(struct pci_dev *pdev) +{ + int ret; + + ret = rhi_vdev_set_tdi_state(pdev, RHI_DA_TDI_CONFIG_UNLOCKED); + if (ret) { + pci_err(pdev, "failed to unlock the device (%d)\n", ret); + return ret; + } + return 0; +} diff --git a/drivers/virt/coco/arm-cca-guest/rsi-da.h b/drivers/virt/coco/arm-cca-guest/rsi-da.h index 858bfdaf59c9..3619a75e160e 100644 --- a/drivers/virt/coco/arm-cca-guest/rsi-da.h +++ b/drivers/virt/coco/arm-cca-guest/rsi-da.h @@ -32,4 +32,6 @@ static inline int rsi_vdev_id(struct pci_dev *pdev) PCI_DEVID(pdev->bus->number, pdev->devfn); } +int cca_device_lock(struct pci_dev *pdev); +int cca_device_unlock(struct pci_dev *pdev); #endif -- 2.43.0