From nobody Tue Dec 2 02:58:22 2025 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 68E9A2AEF5; Mon, 17 Nov 2025 14:01:36 +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=1763388096; cv=none; b=cEMvGco7m8+OYNiE+ZS77Kc2G7eLSGqr2HKjF4qoENgFBIOkUj2UvQKRa4+P4iDO7YbU1KgspxKkQ/CBB+7yeU2AvalMvhmKh+7RRSG8y0jW3bfRL2ybcz/pWwdC3jR42ZjR6hBEqrdStNWokx4gBG7vlNxf2tC7bWr8DWrXMvA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763388096; c=relaxed/simple; bh=jzqp5L6i6oSJSOFQ7k80/LJ+BF1WQ9a6s4hanokXhI0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CzvaGju2QWka8tReaZcUi2n5SWITCOK3XZzPg/PI3/AuhpJOFGeb6OSQVl44ZDWmHdcxgQQCdssUNpxCOadnau9+NsNZy+2q9QUH5iZpp2uGiC0woJLZ3eKVpAACtaeEWb35/ldztR4dfrwKzx/iVgh0OZZMEqadxxqtGMtqzPs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dC03GAh6; 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="dC03GAh6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 87D1DC19424; Mon, 17 Nov 2025 14:01:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763388096; bh=jzqp5L6i6oSJSOFQ7k80/LJ+BF1WQ9a6s4hanokXhI0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dC03GAh6W5C1RFPMo5liMfGzVU17Ta6KatQ/l0ICX5l64Ettk36M76oY0HA5QxrXV PAhRg2PAOLDueI96eBHlOYnXNBQWTSrCxI9vVotB/iFfTAb9QheLVGEsK4+GHqAViB Np3Qld9FiUA+mmkcYhfk9nl3pIzDenFzZXc83uQigO22G3d6Gjlj0U2fuy8V/FF8cQ RdswForiQ2KDRZjfYzzyRzG9JQRYkJTjwhCo4UKJ99RmDH5jDTzsvHnvzjunBhMobs uuPMMUzG2I6sNZgeYp/oea/A3BLZhQQsWYaIgvnu31tzdOqI51iY4g13G01jx47XnJ MCIG3ZI4KUNbA== 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 11/11] coco: guest: arm64: Enable vdev DMA after attestation Date: Mon, 17 Nov 2025 19:30:07 +0530 Message-ID: <20251117140007.122062-12-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" - define SMC_RSI_VDEV_DMA_ENABLE and add wrapper in rsi_cmds.h - invoke the new helper from the guest accept path once the device passes attestation, rolling back to TDI_LOCKED on failure Signed-off-by: Aneesh Kumar K.V (Arm) Reviewed-by: Jonathan Cameron --- arch/arm64/include/asm/rsi_cmds.h | 15 +++++++++++++++ arch/arm64/include/asm/rsi_smc.h | 2 ++ drivers/virt/coco/arm-cca-guest/rsi-da.c | 14 ++++++++++++++ 3 files changed, 31 insertions(+) diff --git a/arch/arm64/include/asm/rsi_cmds.h b/arch/arm64/include/asm/rsi= _cmds.h index e6d68760a729..bce08778c799 100644 --- a/arch/arm64/include/asm/rsi_cmds.h +++ b/arch/arm64/include/asm/rsi_cmds.h @@ -225,4 +225,19 @@ static inline unsigned long rsi_vdev_get_info(unsigned= long vdev_id, return res.a0; } =20 +static inline unsigned long __rsi_vdev_dma_enable(unsigned long vdev_id, + unsigned long non_ats_plane, + unsigned long lock_nonce, + unsigned long meas_nonce, + unsigned long report_nonce) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_invoke(SMC_RSI_VDEV_DMA_ENABLE, vdev_id, + non_ats_plane, lock_nonce, + meas_nonce, report_nonce, &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 49334d07dd55..7bfc8bc5c2ff 100644 --- a/arch/arm64/include/asm/rsi_smc.h +++ b/arch/arm64/include/asm/rsi_smc.h @@ -186,6 +186,8 @@ struct realm_config { */ #define SMC_RSI_IPA_STATE_GET SMC_RSI_FID(0x198) =20 +#define SMC_RSI_VDEV_DMA_ENABLE SMC_RSI_FID(0x19C) + struct rsi_vdevice_info { union { struct { diff --git a/drivers/virt/coco/arm-cca-guest/rsi-da.c b/drivers/virt/coco/a= rm-cca-guest/rsi-da.c index 4852a03dd17d..0b98f6271da6 100644 --- a/drivers/virt/coco/arm-cca-guest/rsi-da.c +++ b/drivers/virt/coco/arm-cca-guest/rsi-da.c @@ -264,6 +264,13 @@ static int verify_digests(struct cca_guest_dsc *dsc) return 0; } =20 +static inline int rsi_vdev_enable_dma(int vdev_id, struct dsm_device_info = *dev_info) +{ + return __rsi_vdev_dma_enable(vdev_id, 0, dev_info->lock_nonce, + dev_info->meas_nonce, dev_info->report_nonce); + +} + int cca_device_verify_and_accept(struct pci_dev *pdev) { int ret; @@ -336,5 +343,12 @@ int cca_device_verify_and_accept(struct pci_dev *pdev) pci_err(pdev, "failed to switch the device (%u) to RUN state\n", ret); return -EIO; } + + if (rsi_vdev_enable_dma(vdev_id, &dsc->dev_info)) { + rhi_vdev_set_tdi_state(pdev, RHI_DA_TDI_CONFIG_LOCKED); + pci_err(pdev, "failed to enable DMA from the device %d\n", ret); + return -EIO; + } + return 0; } --=20 2.43.0