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 A2612273D7C; Mon, 28 Jul 2025 13:55:29 +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=1753710929; cv=none; b=ALg4C5LKVr4M+eURqOspOHbPBIggVlieQeXXoZDa58xDiEnu6JpV299uevFkifLFKhrEbjDrbgIgfp8QbI+LQg6S4ku6Gs6TYXNCBA1FAzp7SwquQAln3FAS8nOFkjd9ZjUZtQYotLeSXgxZ8Onr7E0WawS0XkDd2W2u/oJ/MIc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753710929; c=relaxed/simple; bh=Ze7PT5F9v/p5VT9WHtpaCA4SAdVWFE+04WmlwvCiPpM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CRRZzN3E0YnmKTJcowu9Hvzb3Am5weht/+IfXwGx0j75PwPgjHMli0F2wQWLp+/IgclCzSjes5T4z9vyOUrYrP6s/NvH7yIE8dqywu1k1xyJPR8Byb6tKYl0Tir+hx+TiDf4QNmq5xu7vl8tgRtcSIKDlz5zIF1UJDbHf1HR5eU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EHTzaYAT; 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="EHTzaYAT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E0FDC4CEF7; Mon, 28 Jul 2025 13:55:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753710929; bh=Ze7PT5F9v/p5VT9WHtpaCA4SAdVWFE+04WmlwvCiPpM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EHTzaYATelYucJ58eoPs+D2HGmOMerJ9TqheUwRR9fWa80wiu3b7afAwuTXXVMx0I qsZeHTG96YAtnWohw8UHhyOWU2J/5tD2kQ50w4nSMXCSccAmy2AhKu+Ut7PD3VJduq PufT9ds23yxb9pGu5O6xzmm2B1Y4R2ps9R4O9G0SNcMEZORyDtPltcVnV+x70gUOXm VEyKWeePSybKuOavQnrlTsT5ftDRNVnkcAN9h+u2p/cmb9PE3q0uy3zi9E29Dz8LtJ EmkeGgRzC0G2jfvSgWMMrUm7PD43syBGxXI3GABAkrgMJhYAxcSvG3Cnt80sFXokdY OzFg2rvRigPXA== 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 29/38] coco: guest: arm64: Add support for collecting interface reports Date: Mon, 28 Jul 2025 19:22:06 +0530 Message-ID: <20250728135216.48084-30-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 Support collecting interface reports using RSI calls. Signed-off-by: Aneesh Kumar K.V (Arm) --- arch/arm64/include/asm/rsi_cmds.h | 14 ++++++++++ arch/arm64/include/asm/rsi_smc.h | 2 ++ drivers/virt/coco/arm-cca-guest/rsi-da.c | 34 ++++++++++++++++++++++++ 3 files changed, 50 insertions(+) diff --git a/arch/arm64/include/asm/rsi_cmds.h b/arch/arm64/include/asm/rsi_cmds.h index b9c4b8ff5631..1d76f7d37cb6 100644 --- a/arch/arm64/include/asm/rsi_cmds.h +++ b/arch/arm64/include/asm/rsi_cmds.h @@ -205,4 +205,18 @@ static inline unsigned long rsi_rdev_continue(unsigned long vdev_id, unsigned lo return res.a0; } +static inline unsigned long __rsi_rdev_get_interface_report(unsigned long vdev_id, + unsigned long inst_id, + unsigned long version_max, + unsigned long *version) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_invoke(SMC_RSI_RDEV_GET_INTERFACE_REPORT, + vdev_id, inst_id, version_max, &res); + + *version = res.a1; + 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 44b583ab6d67..6afcccee2ae7 100644 --- a/arch/arm64/include/asm/rsi_smc.h +++ b/arch/arm64/include/asm/rsi_smc.h @@ -194,6 +194,8 @@ struct realm_config { #define SMC_RSI_RDEV_GET_INSTANCE_ID SMC_RSI_FID(0x19c) #define SMC_RSI_RDEV_CONTINUE SMC_RSI_FID(0x1a4) +#define SMC_RSI_RDEV_GET_INTERFACE_REPORT SMC_RSI_FID(0x1a6) + #define SMC_RSI_RDEV_LOCK SMC_RSI_FID(0x1a9) #endif /* __ASM_RSI_SMC_H_ */ diff --git a/drivers/virt/coco/arm-cca-guest/rsi-da.c b/drivers/virt/coco/arm-cca-guest/rsi-da.c index 097cf52ee199..28ec946df1e2 100644 --- a/drivers/virt/coco/arm-cca-guest/rsi-da.c +++ b/drivers/virt/coco/arm-cca-guest/rsi-da.c @@ -29,9 +29,31 @@ static inline unsigned long rsi_rdev_lock(struct pci_dev *pdev, return RSI_SUCCESS; } +static inline unsigned long +rsi_rdev_get_interface_report(struct pci_dev *pdev, unsigned long vdev_id, + unsigned long inst_id, unsigned long version_max, + unsigned long *version) +{ + unsigned long ret; + + ret = __rsi_rdev_get_interface_report(vdev_id, inst_id, version_max, version); + 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 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); @@ -48,5 +70,17 @@ int rsi_device_lock(struct pci_dev *pdev) return -EIO; } + ret = rsi_rdev_get_interface_report(pdev, vdev_id, dsm->instance_id, + PCI_TDISP_MESSAGE_VERSION_10, &tdisp_version); + if (ret != RSI_SUCCESS) { + pci_err(pdev, "failed to get interface report (%lu)\n", ret); + return -EIO; + } + + if (tdisp_version != PCI_TDISP_MESSAGE_VERSION_10) { + pci_err(pdev, "unknown TDISP version (%lu)\n", tdisp_version); + return -EOPNOTSUPP; + } + return ret; } -- 2.43.0