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 93BD0273D7C; Mon, 28 Jul 2025 13:55:35 +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=1753710935; cv=none; b=HUTFh/5FJx3514diBoiLB4/DmJ9xYBmwdPevz0ct5Ux/WRCIlh8KpvGqvLkKqVj24xVCNE3/VD81RWKC5Bk8DZY5KPYrFJz6CFG00bKj+Yo9eZVcLjOOvZF46weG8WBMZgmn7fGZKCqaQqkJ1UJJQJsJYeBDV3YS4uuAxV4RDFI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753710935; c=relaxed/simple; bh=RN0CUhbZzR040Mg0s29M+9z5gFuvjBCdUvvmi2BiIEc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DOvaOS/U5rpaahrXk0UTdoYrjyjnuYyCLsGiVi4RWdRevn16+4of7hAc3f4RU3M+d5fs/sT8jknHCaWypDXlFO0CEiWGsl/TRlIafG33CgfWCkGOa1tVEQQmGeJjiALaep1aBsbOFXELkjRQi2WFA59Uzq5xikRJCDCjwEGpImQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mX3ZdPKz; 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="mX3ZdPKz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 176AFC4CEFE; Mon, 28 Jul 2025 13:55:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753710935; bh=RN0CUhbZzR040Mg0s29M+9z5gFuvjBCdUvvmi2BiIEc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mX3ZdPKz02WSxNRrbXpCzA2um2VhieabFSA7AL+4A2JIB+zlzWvbQJatA96WeJwNS Y08gFfbphtbkRgplTRqNZCrLfiK6lsjM59WkowBvOrRiQQlPn+xJEPHaGi7xdiFlZV /9/1qoeqikPt4tOmIF3yJmWdQQ9WBbBqZx/bnfuXxj2SsgIu3vghiuilZq9WAgIlPt Lr2UhRlBGZsy+cQscYAcaYp1uiEuQCZb69+3UnxOhvzKbu2vDNQwPMQdfPAxReIBaP CRRCGWn5Teu6nFJPSF/lyIBJ0jU28nCHIh88WSrPx/xMBDibj7HMzBw3NRX8MjJyCL +Hyfdx1iaXBwg== 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 30/38] coco: host: arm64: Add support for realm host interface (RHI) Date: Mon, 28 Jul 2025 19:22:07 +0530 Message-ID: <20250728135216.48084-31-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-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Device assignment-related RHI calls result in a REC exit, which is handled by the tsm guest_request callback. Signed-off-by: Aneesh Kumar K.V (Arm) --- arch/arm64/include/asm/rhi.h | 32 ++++++++++ drivers/virt/coco/arm-cca-host/arm-cca.c | 68 ++++++++++++++++++++ drivers/virt/coco/arm-cca-host/rmm-da.c | 81 ++++++++++++++++++++++++ drivers/virt/coco/arm-cca-host/rmm-da.h | 4 ++ include/linux/tsm.h | 3 + 5 files changed, 188 insertions(+) create mode 100644 arch/arm64/include/asm/rhi.h diff --git a/arch/arm64/include/asm/rhi.h b/arch/arm64/include/asm/rhi.h new file mode 100644 index 000000000000..d3c22e582678 --- /dev/null +++ b/arch/arm64/include/asm/rhi.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2024 ARM Ltd. + */ + +#ifndef __ASM_RHI_H_ +#define __ASM_RHI_H_ + +#define SMC_RHI_CALL(func) \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_STANDARD_HYP,\ + (func)) + + +#define RHI_DA_FEATURES SMC_RHI_CALL(0x004d) +#define RHI_DA_OBJECT_SIZE SMC_RHI_CALL(0x004e) +#define RHI_DA_OBJECT_READ SMC_RHI_CALL(0x004f) + +#define RHI_DA_OBJECT_CERTIFICATE 0x1 +#define RHI_DA_OBJECT_MEASUREMENT 0x2 +#define RHI_DA_OBJECT_INTERFACE_REPORT 0x3 +#define RHI_DA_OBJECT_VCA 0x4 + + +#define RHI_DA_SUCCESS 0x1 +#define RHI_ERROR_INVALID_VDEV_ID 0x2 +#define RHI_ERROR_INVALID_DA_OBJECT_TYPE 0x3 +#define RHI_ERROR_DATA_NOT_AVAILABLE 0x4 +#define RHI_ERROR_INVALID_OFFSET 0x5 +#define RHI_ERROR_INVALID_ADDR 0x6 +#endif diff --git a/drivers/virt/coco/arm-cca-host/arm-cca.c b/drivers/virt/coco/arm-cca-host/arm-cca.c index be1296fb1bf2..0807fcf8d222 100644 --- a/drivers/virt/coco/arm-cca-host/arm-cca.c +++ b/drivers/virt/coco/arm-cca-host/arm-cca.c @@ -260,6 +260,73 @@ static void cca_tsm_unbind(struct pci_tdi *tdi) module_put(THIS_MODULE); } +struct da_object_size_req { + int object_type; +}; + +struct da_object_read_req { + int object_type; + unsigned long offset; +}; + +static int cca_tsm_guest_req(struct pci_dev *pdev, struct tsm_guest_req_info *info) +{ + int ret; + + switch (info->type) { + case ARM_CCA_DA_OBJECT_SIZE: + { + int object_size; + struct da_object_size_req req; + + if (sizeof(req) != info->req_len) + return -EINVAL; + + if (copy_from_user(&req, info->req, info->req_len)) + return -EFAULT; + + object_size = rme_get_da_object_size(pdev, req.object_type); + if (object_size > 0) { + if (info->resp_len < sizeof(object_size)) + return -EINVAL; + if (copy_to_user(info->resp, &object_size, sizeof(object_size))) + return -EFAULT; + info->resp_len = sizeof(object_size); + ret = 0; + } else + /* error */ + ret = object_size; + break; + } + case ARM_CCA_DA_OBJECT_READ: + { + int resp_len; + struct da_object_read_req req; + + if (sizeof(req) != info->req_len) + return -EINVAL; + + if (copy_from_user(&req, info->req, info->req_len)) + return -EFAULT; + + resp_len = rme_da_object_read(pdev, req.object_type, req.offset, + info->resp_len, + info->resp); + if (resp_len > 0) { + info->resp_len = resp_len; + ret = 0; + } else + /* error */ + ret = resp_len; + break; + } + default: + ret = -EINVAL; + break; + } + return ret; +} + static const struct pci_tsm_ops cca_pci_ops = { .probe = cca_tsm_pci_probe, .remove = cca_tsm_pci_remove, @@ -267,6 +334,7 @@ static const struct pci_tsm_ops cca_pci_ops = { .disconnect = cca_tsm_disconnect, .bind = cca_tsm_bind, .unbind = cca_tsm_unbind, + .guest_req = cca_tsm_guest_req, }; static void cca_tsm_remove(void *tsm_core) diff --git a/drivers/virt/coco/arm-cca-host/rmm-da.c b/drivers/virt/coco/arm-cca-host/rmm-da.c index bef33e618fd3..c7da9d12f258 100644 --- a/drivers/virt/coco/arm-cca-host/rmm-da.c +++ b/drivers/virt/coco/arm-cca-host/rmm-da.c @@ -10,7 +10,9 @@ #include #include #include +#include #include +#include #include "rmm-da.h" @@ -769,6 +771,85 @@ static int rme_exit_vdev_req_handler(struct realm_rec *rec) return 1; } +int rme_get_da_object_size(struct pci_dev *pdev, int type) +{ + int ret = 0; + unsigned long len; + struct pci_tsm *tsm = pdev->tsm; + struct cca_host_dsc_pf0 *dsc_pf0; + + if (!tsm) + return -EINVAL; + + dsc_pf0 = to_cca_dsc_pf0(tsm->dsm_dev); + + /* Determine the buffer that should be used */ + if (type == RHI_DA_OBJECT_INTERFACE_REPORT) { + len = dsc_pf0->interface_report.size; + } else if (type == RHI_DA_OBJECT_MEASUREMENT) { + len = dsc_pf0->measurements.size; + } else if (type == RHI_DA_OBJECT_CERTIFICATE) { + len = dsc_pf0->cert_chain.cache.size; + } else if (type == RHI_DA_OBJECT_VCA) { + len = dsc_pf0->vca.size; + } else { + ret = -EINVAL; + goto err_out; + } + + return len; +err_out: + return ret; +} + +int rme_da_object_read(struct pci_dev *pdev, int type, unsigned long offset, + unsigned long max_len, void __user *user_buf) +{ + void *buf; + int ret = 0; + unsigned long len; + struct cca_host_dsc_pf0 *dsc_pf0; + struct pci_tsm *tsm = pdev->tsm; + + if (!tsm) + return -EINVAL; + + dsc_pf0 = to_cca_dsc_pf0(tsm->dsm_dev); + + /* Determine the buffer that should be used */ + if (type == RHI_DA_OBJECT_INTERFACE_REPORT) { + len = dsc_pf0->interface_report.size; + buf = dsc_pf0->interface_report.buf; + } else if (type == RHI_DA_OBJECT_MEASUREMENT) { + len = dsc_pf0->measurements.size; + buf = dsc_pf0->measurements.buf; + } else if (type == RHI_DA_OBJECT_CERTIFICATE) { + len = dsc_pf0->cert_chain.cache.size; + buf = dsc_pf0->cert_chain.cache.buf; + } else if (type == RHI_DA_OBJECT_VCA) { + len = dsc_pf0->vca.size; + buf = dsc_pf0->vca.buf; + } else { + ret = -EINVAL; + goto err_out; + } + + /* Assume that the buffer is large enough for the whole report */ + if ((max_len - offset) < len) { + /* FIXME!! the error code */ + ret = -ENOMEM; + goto err_out; + } + + if (copy_to_user(user_buf + offset, buf, len)) { + ret = -EIO; + goto err_out; + } + ret = len; +err_out: + return ret; +} + void rme_register_exit_handlers(void) { realm_exit_vdev_comm_handler = rme_exit_vdev_comm_handler; diff --git a/drivers/virt/coco/arm-cca-host/rmm-da.h b/drivers/virt/coco/arm-cca-host/rmm-da.h index cebddab8464d..457660ff3b69 100644 --- a/drivers/virt/coco/arm-cca-host/rmm-da.h +++ b/drivers/virt/coco/arm-cca-host/rmm-da.h @@ -10,6 +10,7 @@ #include #include #include +#include #define MAX_CACHE_OBJ_SIZE 4096 struct cache_object { @@ -101,4 +102,7 @@ void *rme_create_vdev(struct realm *realm, struct pci_dev *pdev, void rme_unbind_vdev(struct realm *realm, struct pci_dev *pdev, struct pci_dev *pf0_dev); void rme_register_exit_handlers(void); +int rme_get_da_object_size(struct pci_dev *pdev, int type); +int rme_da_object_read(struct pci_dev *pdev, int type, unsigned long offset, + unsigned long max_len, void __user *user_buf); #endif diff --git a/include/linux/tsm.h b/include/linux/tsm.h index 497a3b4df5a0..e82046b0c7fa 100644 --- a/include/linux/tsm.h +++ b/include/linux/tsm.h @@ -145,5 +145,8 @@ struct tsm_guest_req_info { size_t resp_len; }; +#define ARM_CCA_DA_OBJECT_SIZE 0x1 +#define ARM_CCA_DA_OBJECT_READ 0x2 + int tsm_guest_req(struct device *dev, struct tsm_guest_req_info *info); #endif /* __TSM_H */ -- 2.43.0