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 24B793264FA; Mon, 27 Apr 2026 06:52:47 +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=1777272768; cv=none; b=HdIjSlW8+1REhp4h/shtGaFJSefZymS22I6rQQWQ2gXM6+QeeONjj/qQxTuJaTM1DW2ktdDCyvg03NnZHUTaLxXNJ/Jvr+q1V1YwDVbgNO7b4Fq0Psi7vqQ1PiT5IYcpo3nESpxzCfzXNOk+6XK6IxnhWQfs9b6Zp8mlTkS/S6M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777272768; c=relaxed/simple; bh=437kH86jrTn4c1Epnw3resuWckEvIYjsHBmw7fIP+EI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=s5qRGNfPTTtWp7eZy4N0yFIls6wg1BqyoD7CtdkPz6OUgLjhha9W0vYCMV9UnjXKJBE9LhFFDg8sQxkJjWBMN0Fet1XlcB9cGM6y4U/zOAvjhVoGZhl+Zbk3GsZ3S/dcr/FT0XG66BqTlMoXFYvwwswo8yZqL29wiSTioQgakl0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VsTz+yqz; 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="VsTz+yqz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 05037C2BCC4; Mon, 27 Apr 2026 06:52:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777272767; bh=437kH86jrTn4c1Epnw3resuWckEvIYjsHBmw7fIP+EI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VsTz+yqzRX5JWFXZZf9VJOF0bKQiZOVuDoPji4g1OmLkdzebLsB7i4cbYXSfeRtx5 OvMcZDNbo6zJY/e2lIT01+Bq+26mBgFksiGi8UW5EOedPKDFI91fFD7iaz4icdS5+G ZpcA79VuLeFLsJ38vg5yj29PUrrMYXmVYk8dQUqDt4UwvojIoCZT7Q+6pDc6w7n6wz v4STTOPn8lwri6ZSGF3vcDKCEaEYx2hg2GSCjn79CvQR7ueHMn9Ho7H86liZ0QGP9D aqz/pQ5iYC7EngUQpuaUrOpKeS7Wt417IWVlBkqqJATaz1pd0FTczxlP79EkIgqfZ2 Uf6XsOqxcIqXg== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: "Aneesh Kumar K.V (Arm)" , Alexey Kardashevskiy , Catalin Marinas , Dan Williams , Jason Gunthorpe , Jonathan Cameron , Marc Zyngier , Samuel Ortiz , Steven Price , Suzuki K Poulose , Will Deacon , Xu Yilun Subject: [RFC PATCH v4 13/14] PCI/TSM: Move CMA DOE mailbox discovery out of pci_tsm_pf0_constructor() Date: Mon, 27 Apr 2026 12:21:20 +0530 Message-ID: <20260427065121.916615-14-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260427065121.916615-1-aneesh.kumar@kernel.org> References: <20260427065121.916615-1-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: 8bit pci_tsm_pf0_constructor() currently looks up a CMA DOE mailbox and fails PF0 initialization when one is not present. That is too strict for all link TSM drivers. Move CMA DOE mailbox discovery into the low-level PF0 probe callbacks so each driver can decide whether a mailbox is mandatory. Keep SEV-TIO and TDX requiring a CMA mailbox, while allowing the arm-cca host path to proceed on PF0 devices that do not support IDE and therefore have no DOE-based SPDM path. Signed-off-by: Aneesh Kumar K.V (Arm) --- drivers/crypto/ccp/sev-dev-tsm.c | 13 +++++++++++++ drivers/pci/tsm/core.c | 14 ++++++++------ drivers/virt/coco/arm-cca-host/arm-cca.c | 16 +++++++++++++--- drivers/virt/coco/tdx-host/tdx-host.c | 13 +++++++++++++ 4 files changed, 47 insertions(+), 9 deletions(-) diff --git a/drivers/crypto/ccp/sev-dev-tsm.c b/drivers/crypto/ccp/sev-dev-tsm.c index b07ae529b591..a7506cbbe392 100644 --- a/drivers/crypto/ccp/sev-dev-tsm.c +++ b/drivers/crypto/ccp/sev-dev-tsm.c @@ -217,6 +217,19 @@ static struct pci_tsm *tio_pf0_probe(struct pci_dev *pdev, struct sev_device *se if (rc) return NULL; + /* if device have ide cap, setup doe mailbox */ + if (pdev->ide_cap) { + struct pci_doe_mb *doe_mb; + + doe_mb = pci_find_doe_mailbox(pdev, PCI_VENDOR_ID_PCI_SIG, + PCI_DOE_FEATURE_CMA); + if (!doe_mb) + return NULL; + dsm->tsm.doe_mb = doe_mb; + } else { + return NULL; + } + pci_dbg(pdev, "TSM enabled\n"); dsm->sev = sev; return &no_free_ptr(dsm)->tsm.base_tsm; diff --git a/drivers/pci/tsm/core.c b/drivers/pci/tsm/core.c index bb440135b8f7..900306a43161 100644 --- a/drivers/pci/tsm/core.c +++ b/drivers/pci/tsm/core.c @@ -1236,12 +1236,14 @@ int pci_tsm_pf0_constructor(struct pci_dev *pdev, struct pci_tsm_pf0 *tsm, struct tsm_dev *tsm_dev) { mutex_init(&tsm->lock); - tsm->doe_mb = pci_find_doe_mailbox(pdev, PCI_VENDOR_ID_PCI_SIG, - PCI_DOE_FEATURE_CMA); - if (!tsm->doe_mb) { - pci_warn(pdev, "TSM init failure, no CMA mailbox\n"); - return -ENODEV; - } + + /* + * Note, low-level TSM driver responsible for determining if it wants to + * proceed with a device that has no DOE mailbox. TSM may have an + * alternate method for coordinating TDISP. + */ + if (!tsm->doe_mb) + pci_dbg(pdev, "no CMA mailbox\n"); return pci_tsm_link_constructor(pdev, &tsm->base_tsm, tsm_dev); } diff --git a/drivers/virt/coco/arm-cca-host/arm-cca.c b/drivers/virt/coco/arm-cca-host/arm-cca.c index 0b1200f591ab..265aa0cb612a 100644 --- a/drivers/virt/coco/arm-cca-host/arm-cca.c +++ b/drivers/virt/coco/arm-cca-host/arm-cca.c @@ -11,6 +11,8 @@ #include #include #include +#include + #include "rmi-da.h" @@ -35,14 +37,22 @@ static struct pci_tsm *cca_tsm_pci_probe(struct tsm_dev *tsm_dev, struct pci_dev return &no_free_ptr(fn_dsc)->pci; } - if (!pdev->ide_cap) - return NULL; - struct cca_host_pf0_ep_dsc *pf0_ep_dsc __free(kfree) = kzalloc(sizeof(*pf0_ep_dsc), GFP_KERNEL); if (!pf0_ep_dsc) return NULL; + /* if device have ide cap, setup doe mailbox */ + if (pdev->ide_cap) { + struct pci_doe_mb *doe_mb; + + doe_mb = pci_find_doe_mailbox(pdev, PCI_VENDOR_ID_PCI_SIG, + PCI_DOE_FEATURE_CMA); + if (!doe_mb) + return NULL; + pf0_ep_dsc->pci.doe_mb = doe_mb; + } + ret = pci_tsm_pf0_constructor(pdev, &pf0_ep_dsc->pci, tsm_dev); if (ret) return NULL; diff --git a/drivers/virt/coco/tdx-host/tdx-host.c b/drivers/virt/coco/tdx-host/tdx-host.c index ea7c2167660f..4947b9bc2359 100644 --- a/drivers/virt/coco/tdx-host/tdx-host.c +++ b/drivers/virt/coco/tdx-host/tdx-host.c @@ -634,6 +634,19 @@ static struct pci_tsm *tdx_link_pf0_probe(struct tsm_dev *tsm_dev, spdm_conf->vmm_spdm_cap = SPDM_CAP_KEY_UPD; spdm_conf->certificate_slot_mask = 0xff; + /* if device have ide cap, setup doe mailbox */ + if (pdev->ide_cap) { + struct pci_doe_mb *doe_mb; + + doe_mb = pci_find_doe_mailbox(pdev, PCI_VENDOR_ID_PCI_SIG, + PCI_DOE_FEATURE_CMA); + if (!doe_mb) + return NULL; + tlink->pci.doe_mb = doe_mb; + } else { + return NULL; + } + tlink->in_msg = no_free_ptr(in_msg); tlink->out_msg = no_free_ptr(out_msg); tlink->spdm_conf = no_free_ptr(spdm_conf); -- 2.43.0