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 83ECF332EB2; Mon, 17 Nov 2025 14:00:40 +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=1763388040; cv=none; b=hOQ1oyzkODU5Z8bDaya97WG9jlsbYTl+/tJhfZyIeJ8gdjvkuWJgUlX1JhkeLRj6HMnoIyef35zU39KxztPb/cJvwskb8wRQZM3MtAqNnUU0OO/1RMafWH02byVlhoK5vv9xgZBJTuXt4tqDwzbR7B7sByRXBp5JLMskejhqBWc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763388040; c=relaxed/simple; bh=skmqiPydXKmGDZG76wasmKG8RYvqg1SsacoWzOtzd+c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UEFHYCdAHNiBs+Vy8blaG6baJIeWwScWnVotv/LoolgcyuvrvKTFY/5MVAJLsy8AsORkLF0QFLLxV5hy9sBfyA9O1/1Pvl/J0iTK2oyre+tniSEn3VQ8rMlelLqIKsiDloJKHD6It8Spkt20Gc/JYD5cTKamf4i4Afp+1CK9Rc8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Mq2lWTjW; 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="Mq2lWTjW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6B1BC4CEFB; Mon, 17 Nov 2025 14:00:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763388040; bh=skmqiPydXKmGDZG76wasmKG8RYvqg1SsacoWzOtzd+c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Mq2lWTjWxhJSZOR6Qpek3FMz0T6WEP1L++ClRQanE8zuxdFK9gc3pTZ5bArzQU96r yOw2oD/HektMSARh6Br7oIRNq6H9DhAuXU9nQsFDuvrvWKM19LJX6EnOUQs02kwMfi oEVzWGtPmtwSdxFNbr3QEJb/IR3xx+D1LlDxAXhzy4KkEAJAMQS8NG018FW83Enyg+ FPuklEp5thTm6hNFVnNkG2gaJVeGmmj/o6xU9H87lY/5awtBpDP9JOMY5WSVZ5Qn8h x+anrBYpkFZRTfVJdlPQqHl9I/ie6BkSCpimLOv08JQHi5zhPHI3P46HirLugZJTEr KEy1ugEHvlYRA== 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, dan.j.williams@intel.com, aik@amd.com, lukas@wunner.de, Samuel Ortiz , Xu Yilun , Jason Gunthorpe , Suzuki K Poulose , Steven Price , Bjorn Helgaas , Jonathan Cameron , Catalin Marinas , Marc Zyngier , Will Deacon , Oliver Upton , "Aneesh Kumar K.V (Arm)" Subject: [PATCH v2 03/11] coco: guest: arm64: Add support for guest initiated TDI bind/unbind Date: Mon, 17 Nov 2025 19:29:59 +0530 Message-ID: <20251117140007.122062-4-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251117140007.122062-1-aneesh.kumar@kernel.org> References: <20251117140007.122062-1-aneesh.kumar@kernel.org> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add RHI for VDEV_SET_TDI_STATE Note: This is not part of RHI spec. This is a POC implementation and will be later converted to correct interface defined by RHI. 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 | 8 ++++- drivers/virt/coco/arm-cca-guest/rsi-da.c | 36 +++++++++++++++++++++++ drivers/virt/coco/arm-cca-guest/rsi-da.h | 2 ++ 4 files changed, 46 insertions(+), 2 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 04d26e398a1d..146af69d0362 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 rhi-da.o +arm-cca-guest-y += arm-cca.o 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 26be2e8fe182..f4c9e529c43e 100644 --- a/drivers/virt/coco/arm-cca-guest/arm-cca.c +++ b/drivers/virt/coco/arm-cca-guest/arm-cca.c @@ -208,13 +208,19 @@ static struct pci_tsm *cca_tsm_lock(struct tsm_dev *tsm_dev, struct pci_dev *pde if (ret) return ERR_PTR(ret); - return ERR_PTR(-EIO); + ret = cca_device_lock(pdev); + if (ret) + return ERR_PTR(-EIO); + + 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..6770861629f2 --- /dev/null +++ b/drivers/virt/coco/arm-cca-guest/rsi-da.c @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2025 ARM Ltd. + */ + +#include +#include + +#include "rsi-da.h" +#include "rhi-da.h" + +#define PCI_TDISP_MESSAGE_VERSION_10 0x10 + +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 (%u)\n", ret); + return -EIO; + } + 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 (%u)\n", ret); + return -EIO; + } + 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 5ad3b740710e..d1f4641a0fa1 100644 --- a/drivers/virt/coco/arm-cca-guest/rsi-da.h +++ b/drivers/virt/coco/arm-cca-guest/rsi-da.h @@ -29,4 +29,6 @@ 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