linux-kernel - [RFC PATCH v1 01/38] tsm: Add tsm

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Message-ID: <20250728135216.48084-2-aneesh.kumar@kernel.org>
Date: Mon, 28 Jul 2025 19:21:38 +0530
From: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@...nel.org>
To: linux-coco@...ts.linux.dev,
	kvmarm@...ts.linux.dev
Cc: linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	aik@....com,
	lukas@...ner.de,
	Samuel Ortiz <sameo@...osinc.com>,
	Xu Yilun <yilun.xu@...ux.intel.com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Suzuki K Poulose <Suzuki.Poulose@....com>,
	Steven Price <steven.price@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Marc Zyngier <maz@...nel.org>,
	Will Deacon <will@...nel.org>,
	Oliver Upton <oliver.upton@...ux.dev>,
	"Aneesh Kumar K.V (Arm)" <aneesh.kumar@...nel.org>
Subject: [RFC PATCH v1 01/38] tsm: Add tsm_bind/unbind helpers

This will be later used by iommufd to bind a tdi to guest.

Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@...nel.org>
---
 drivers/virt/coco/host/tsm-core.c | 18 ++++++++++++++++++
 include/linux/tsm.h               |  3 +++
 2 files changed, 21 insertions(+)

diff --git a/drivers/virt/coco/host/tsm-core.c b/drivers/virt/coco/host/tsm-core.c
index bd9e09b07412..0a7c9aa46c56 100644
--- a/drivers/virt/coco/host/tsm-core.c
+++ b/drivers/virt/coco/host/tsm-core.c
@@ -116,6 +116,24 @@ void tsm_ide_stream_unregister(struct pci_ide *ide)
 }
 EXPORT_SYMBOL_GPL(tsm_ide_stream_unregister);
 
+int tsm_bind(struct device *dev, struct kvm *kvm, u64 tdi_id)
+{
+	if (!dev_is_pci(dev))
+		return -EINVAL;
+
+	return pci_tsm_bind(to_pci_dev(dev), kvm, tdi_id);
+}
+EXPORT_SYMBOL_GPL(tsm_bind);
+
+int tsm_unbind(struct device *dev)
+{
+	if (!dev_is_pci(dev))
+		return -EINVAL;
+
+	return pci_tsm_unbind(to_pci_dev(dev));
+}
+EXPORT_SYMBOL_GPL(tsm_unbind);
+
 static void tsm_release(struct device *dev)
 {
 	struct tsm_core_dev *core = container_of(dev, typeof(*core), dev);
diff --git a/include/linux/tsm.h b/include/linux/tsm.h
index 915c4c8b061b..0aab8d037e71 100644
--- a/include/linux/tsm.h
+++ b/include/linux/tsm.h
@@ -118,6 +118,9 @@ struct tsm_core_dev *tsm_register(struct device *parent,
 void tsm_unregister(struct tsm_core_dev *tsm_core);
 struct pci_dev;
 struct pci_ide;
+struct kvm;
 int tsm_ide_stream_register(struct pci_dev *pdev, struct pci_ide *ide);
 void tsm_ide_stream_unregister(struct pci_ide *ide);
+int tsm_bind(struct device *dev, struct kvm *kvm, u64 tdi_id);
+int tsm_unbind(struct device *dev);
 #endif /* __TSM_H */
-- 
2.43.0