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 0071126B74A; Mon, 28 Jul 2025 13:56:17 +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=1753710980; cv=none; b=ozN5B8EYAt/kBFUPKtgoA91lvOchzKvz7EtEyPK4Gvadw1Y9e4Wq8z3IC4XALpqosPDfKeyJ499nHYoFnOQ5CEVmdqcchgzfYz0SNhwl+Cz9omZCJ9Fhl3yRl85dUMLR/YX+s5LwVsOpbYLdro9b/0/GzCvorQUBQcPuX0qaDbw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753710980; c=relaxed/simple; bh=8+fCHdn3Uns+Oh6BXNa0Zteex0tK6krOn+9GZide67k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RByeGsy9ksS8kwswNCm/5OfBqs67junPBrE8pvytbDMAMpmEI/fkGWyyVSFMw2j6AIeHfeovokQYn0dJiKzMIiME7YCnK8rfwxzeDZukNx21PXRhvEO35DPC5pfKhniLyHZqxJi02r6v7znh9tvAuAHtO070Yj6VjXD2xuwj6l4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Y1geoA6l; 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="Y1geoA6l" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EE318C4CEEF; Mon, 28 Jul 2025 13:56:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753710977; bh=8+fCHdn3Uns+Oh6BXNa0Zteex0tK6krOn+9GZide67k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y1geoA6leMbw+9D0jt9eF8zWeFNkt4O2OHbAi45jQAPG5w1ugatgPh4ACE+lQL7To 1iUfueuU6Pk6RiEqlW9ZwDCocMmoptgrHn7C2DmowHztL6PwwQrjSWFnef/TTvF5do b37xstGeN36rrnM/aD4yFfeV3I/s33PLgYC+cwLwC/JBVYE8FsnBQ6rUghcqL2lygU 8zx3zgE0P+ongzkqUaW2ZYGWl6xsiNCcsi8zmKOPLQy1md+eCEkVY4rf9rwoYsDvlM bOiTupDCeBfy5aYEB+a+ASAGscX+SfeQSl9VSsgH7Dg0oqL2Z8l2TCZKyrxWNFF27E rEYH5f2Eo+nhg== 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 37/38] coco: guest: arm64: Add support for fetching device measurements Date: Mon, 28 Jul 2025 19:22:14 +0530 Message-ID: <20250728135216.48084-38-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 Fetch device measurements using RSI_RDEV_GET_MEASUREMENTS. Signed-off-by: Aneesh Kumar K.V (Arm) --- arch/arm64/include/asm/rsi_cmds.h | 11 +++++++ arch/arm64/include/asm/rsi_smc.h | 16 ++++++++++ drivers/virt/coco/arm-cca-guest/rsi-da.c | 39 ++++++++++++++++++++++++ drivers/virt/coco/arm-cca-guest/rsi-da.h | 2 ++ 4 files changed, 68 insertions(+) diff --git a/arch/arm64/include/asm/rsi_cmds.h b/arch/arm64/include/asm/rsi_cmds.h index 3463d571d7db..42b998f44a0e 100644 --- a/arch/arm64/include/asm/rsi_cmds.h +++ b/arch/arm64/include/asm/rsi_cmds.h @@ -265,4 +265,15 @@ static inline unsigned long __rsi_rdev_stop(unsigned long vdev_id, unsigned long return res.a0; } +static inline unsigned long __rsi_rdev_get_measurements(unsigned long vdev_id, + unsigned long inst_id, + phys_addr_t meas) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_invoke(SMC_RSI_RDEV_GET_MEASUREMENTS, vdev_id, inst_id, meas, &res); + + return res.a0; +} + #endif /* __ASM_RSI_CMDS_H */ diff --git a/arch/arm64/include/asm/rsi_smc.h b/arch/arm64/include/asm/rsi_smc.h index f6aa647239c0..f051db54cdc3 100644 --- a/arch/arm64/include/asm/rsi_smc.h +++ b/arch/arm64/include/asm/rsi_smc.h @@ -202,6 +202,22 @@ struct rsi_host_call { #define SMC_RSI_RDEV_GET_INTERFACE_REPORT SMC_RSI_FID(0x1a6) +#define RSI_DEV_MEASURE_ALL BIT(0) +#define RSI_DEV_MEASURE_SIGNED BIT(1) +#define RSI_DEV_MEASURE_RAW BIT(2) + +struct rsi_device_measurements_params { + union { + struct { + u64 flags; + u8 indices[32]; + u8 nounce[32]; + }; + u8 padding[0x100]; + }; +}; + +#define SMC_RSI_RDEV_GET_MEASUREMENTS SMC_RSI_FID(0x1a7) #define SMC_RSI_RDEV_LOCK SMC_RSI_FID(0x1a9) #define SMC_RSI_RDEV_START SMC_RSI_FID(0x1aa) #define SMC_RSI_RDEV_STOP SMC_RSI_FID(0x1ab) diff --git a/drivers/virt/coco/arm-cca-guest/rsi-da.c b/drivers/virt/coco/arm-cca-guest/rsi-da.c index 64034d220e02..6222b10964ee 100644 --- a/drivers/virt/coco/arm-cca-guest/rsi-da.c +++ b/drivers/virt/coco/arm-cca-guest/rsi-da.c @@ -166,10 +166,31 @@ static long rhi_get_report(int vdev_id, int da_object_type, void **report, int * return ret; } +static inline unsigned long +rsi_rdev_get_measurements(struct pci_dev *pdev, unsigned long vdev_id, + unsigned long inst_id, phys_addr_t meas) +{ + unsigned long ret; + + ret = __rsi_rdev_get_measurements(vdev_id, inst_id, meas); + if (ret != RSI_SUCCESS) + return ret; + + do { + ret = rsi_rdev_continue(vdev_id, inst_id); + } while (ret == RSI_INCOMPLETE); + if (ret != RSI_SUCCESS) { + pci_err(pdev, "failed to communicate with the device (%lu)\n", ret); + return ret; + } + return RSI_SUCCESS; +} + int rsi_device_lock(struct pci_dev *pdev) { unsigned long ret; unsigned long tdisp_version; + struct rsi_device_measurements_params *rsi_dev_meas; struct cca_guest_dsc *dsm = to_cca_guest_dsc(pdev); int vdev_id = (pci_domain_nr(pdev->bus) << 16) | PCI_DEVID(pdev->bus->number, pdev->devfn); @@ -198,6 +219,17 @@ int rsi_device_lock(struct pci_dev *pdev) return -EOPNOTSUPP; } + rsi_dev_meas = (struct rsi_device_measurements_params *)__get_free_page(GFP_KERNEL); + rsi_dev_meas->flags = RSI_DEV_MEASURE_ALL; + ret = rsi_rdev_get_measurements(pdev, vdev_id, dsm->instance_id, + virt_to_phys(rsi_dev_meas)); + + free_page((unsigned long)rsi_dev_meas); + if (ret != RSI_SUCCESS) { + pci_err(pdev, "failed to get device measurement (%lu)\n", ret); + return -EIO; + } + /* Now make a host call to copy the interface report to guest. */ ret = rhi_get_report(vdev_id, RHI_DA_OBJECT_INTERFACE_REPORT, &dsm->interface_report, &dsm->interface_report_size); @@ -213,6 +245,13 @@ int rsi_device_lock(struct pci_dev *pdev) return -EIO; } + ret = rhi_get_report(vdev_id, RHI_DA_OBJECT_MEASUREMENT, + &dsm->measurements, &dsm->measurements_size); + if (ret) { + pci_err(pdev, "failed to get device certificate from the host (%lu)\n", ret); + return -EIO; + } + return ret; } static inline unsigned long rsi_rdev_start(struct pci_dev *pdev, diff --git a/drivers/virt/coco/arm-cca-guest/rsi-da.h b/drivers/virt/coco/arm-cca-guest/rsi-da.h index 71ee1edb832e..f26156d9be81 100644 --- a/drivers/virt/coco/arm-cca-guest/rsi-da.h +++ b/drivers/virt/coco/arm-cca-guest/rsi-da.h @@ -40,6 +40,8 @@ struct cca_guest_dsc { int interface_report_size; void *certificate; int certificate_size; + void *measurements; + int measurements_size; }; static inline struct cca_guest_dsc *to_cca_guest_dsc(struct pci_dev *pdev) -- 2.43.0