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 CB6512D949F; Thu, 12 Mar 2026 08:05:47 +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=1773302747; cv=none; b=PtYqXd9a+8UCAUpWK/WqHjFns8oYUVtUYgCxQbi6/SDWjY0OBCBw5FAVzzZWTaiUe1PHNpc+xsN03w0dolFOyE8Ar6MHsMQ1nv8FwOkpA4LdUjhTT2MjDHoN3c0CBcDMIK0ZQuH7xdPnBwyNYAkuyFoVctjjmtQcMFgydJlx3hg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773302747; c=relaxed/simple; bh=AFb8qJO3yWFdMCBJS62LAGaVA5aASPEzQ42qXitN/5U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=X67xGHyRyB7Dj9DldqaCrfmfX9skaNPpvATWqZ0m7nxUGlZElx+04cFTqLP23Plfq3wntUTQFET9S7Tst83txZ//fMtgbzVrno9nUizDaf9VVcJlwANh0ahHinuLxOAjbcZUe9CU+1poT8Uiy9D1tNmATAG7SbRwh5wk3/DofXY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MsiNiQ2A; 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="MsiNiQ2A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C3A51C2BC87; Thu, 12 Mar 2026 08:05:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773302747; bh=AFb8qJO3yWFdMCBJS62LAGaVA5aASPEzQ42qXitN/5U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MsiNiQ2A1lQ/hM/cQN23aHdmLk1FOoDo9pAPQ+2JqE5rwwY0qASoqRpx8WO5Pj2fx eOoB1LM28zq0L9qyeulid+8ckcJ5WMv6SlVbheaDya78YpTox3dYsSgO/F85RhsGO4 mOM7+DKWURuImM2jjaixR6sF5MIL71VTxR5SrR2oWTLcr/qOq7jrsBnp3jDJeFSlE8 MccIBHoZDP+7YZByHFlMAS42qTmJy0cyC8hS+IHEoc3BzrmWQsMOJHaJjjJPwhElWe oxfzH8Z3yYvo15kWhgfqBhaYD/BaN5dsJzQwe95UfFVuQUPGRX3cimhs/kAhINTwLw 0RD12oON2gDeQ== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, "Aneesh Kumar K.V (Arm)" , Marc Zyngier , Catalin Marinas , Will Deacon , Jonathan Cameron , Jason Gunthorpe , Dan Williams , Alexey Kardashevskiy , Samuel Ortiz , Xu Yilun , Suzuki K Poulose , Steven Price , Jonathan Cameron Subject: [RFC PATCH v3 09/11] coco: guest: arm64: Hook TSM accept to Realm TDISP RUN transition Date: Thu, 12 Mar 2026 13:34:40 +0530 Message-ID: <20260312080442.3485633-10-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260312080442.3485633-1-aneesh.kumar@kernel.org> References: <20260312080442.3485633-1-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 Add an accept callback in pci_tsm_ops and implement cca_device_accept() to: - verify evidence generation (lock_nonce) - allocate and register protected MMIO ranges - transition TDI state to RUN Cc: Marc Zyngier Cc: Catalin Marinas Cc: Will Deacon Cc: Jonathan Cameron Cc: Jason Gunthorpe Cc: Dan Williams Cc: Alexey Kardashevskiy Cc: Samuel Ortiz Cc: Xu Yilun Cc: Suzuki K Poulose Cc: Steven Price Reviewed-by: Jonathan Cameron Signed-off-by: Aneesh Kumar K.V (Arm) --- drivers/virt/coco/arm-cca-guest/arm-cca.c | 20 +++++++++++ drivers/virt/coco/arm-cca-guest/rsi-da.c | 43 +++++++++++++++++++++++ drivers/virt/coco/arm-cca-guest/rsi-da.h | 1 + 3 files changed, 64 insertions(+) diff --git a/drivers/virt/coco/arm-cca-guest/arm-cca.c b/drivers/virt/coco/arm-cca-guest/arm-cca.c index 80ee20c8a7a6..84152f505b10 100644 --- a/drivers/virt/coco/arm-cca-guest/arm-cca.c +++ b/drivers/virt/coco/arm-cca-guest/arm-cca.c @@ -499,9 +499,29 @@ static void cca_tsm_unlock(struct pci_tsm *tsm) kfree(cca_dsc); } +static int __cca_tsm_accept(struct pci_dev *pdev, unsigned long lock_nonce) +{ + int ret; + + ret = cca_device_accept(pdev, lock_nonce); + if (ret) { + pci_err(pdev, "failed to transition the device to run state (%d)\n", ret); + return ret; + } + return 0; +} + +static int cca_tsm_accept(struct pci_dev *pdev) +{ + struct cca_guest_dsc *dsc = to_cca_guest_dsc(pdev); + + return __cca_tsm_accept(pdev, dsc->dev_info.lock_nonce); +} + static struct pci_tsm_ops cca_devsec_pci_ops = { .lock = cca_tsm_lock, .unlock = cca_tsm_unlock, + .accept = cca_tsm_accept, }; static void cca_devsec_tsm_remove(void *tsm_dev) diff --git a/drivers/virt/coco/arm-cca-guest/rsi-da.c b/drivers/virt/coco/arm-cca-guest/rsi-da.c index 6f40329ac2f9..4030fa213ff4 100644 --- a/drivers/virt/coco/arm-cca-guest/rsi-da.c +++ b/drivers/virt/coco/arm-cca-guest/rsi-da.c @@ -230,3 +230,46 @@ int cca_verify_digests(u64 hash_algo, } return 0; } + +int cca_device_accept(struct pci_dev *pdev, unsigned long lock_nonce) +{ + int ret; + struct cca_guest_dsc *dsc = to_cca_guest_dsc(pdev); + + if (lock_nonce != dsc->dev_info.lock_nonce) { + pci_err(pdev, "Device evidence generation mismatch\n"); + return -EIO; + } + + /* Allocation private mmio range based on interface report. */ + struct pci_tsm_mmio *tsm_mmio __free(kfree) = pci_tsm_mmio_alloc(pdev); + if (!tsm_mmio) { + pci_err(pdev, "Protected mmio range allocation failure\n"); + return -ENOMEM; + } + + /* + * Present the private mmio range in the resource hierarchy. + * We don't use this for ioremap, ioremap check the RIPAS value. + */ + ret = pci_tsm_mmio_setup(pdev, tsm_mmio); + if (ret) { + pci_err(pdev, "Protected mmio setup failure\n"); + return ret; + } + + ret = cca_map_evidence_report_range(pdev, tsm_mmio); + if (ret) { + pci_err(pdev, "failed to validate the interface report\n"); + return ret; + } + + ret = rhi_vdev_set_tdi_state(pdev, RHI_DA_TDI_CONFIG_RUN); + if (ret) { + pci_err(pdev, "failed to switch the device (%u) to RUN state\n", ret); + return ret; + } + + dsc->pci.mmio = no_free_ptr(tsm_mmio); + 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 4903a770412e..c550926145a0 100644 --- a/drivers/virt/coco/arm-cca-guest/rsi-da.h +++ b/drivers/virt/coco/arm-cca-guest/rsi-da.h @@ -61,4 +61,5 @@ int cca_verify_digests(u64 hash_algo, uint8_t *interface_report, size_t interface_report_size, uint8_t *measurements, size_t measurements_size, struct rsi_vdevice_info *dev_info); +int cca_device_accept(struct pci_dev *pdev, unsigned long lock_nonce); #endif -- 2.43.0