Merge tag 'tee-ts-for-v6.10' of https://git.linaro.org/people/jens.wiklander/linux-tee into soc/drivers

TEE driver for Trusted Services

This introduces a TEE driver for Trusted Services [1].

Trusted Services is a TrustedFirmware.org project that provides a
framework for developing and deploying device Root of Trust services in
FF-A [2] Secure Partitions. The project hosts the reference
implementation of Arm Platform Security Architecture [3] for Arm
A-profile devices.

The FF-A Secure Partitions are accessible through the FF-A driver in
Linux. However, the FF-A driver doesn't have a user space interface so
user space clients currently cannot access Trusted Services. The goal of
this TEE driver is to bridge this gap and make Trusted Services
functionality accessible from user space.

[1] https://www.trustedfirmware.org/projects/trusted-services/
[2] https://developer.arm.com/documentation/den0077/
[3] https://www.arm.com/architecture/security-features/platform-security

* tag 'tee-ts-for-v6.10' of https://git.linaro.org/people/jens.wiklander/linux-tee:
  MAINTAINERS: tee: tstee: Add entry
  Documentation: tee: Add TS-TEE driver
  tee: tstee: Add Trusted Services TEE driver
  tee: optee: Move pool_op helper functions
  tee: Refactor TEE subsystem header files

Link: https://lore.kernel.org/r/20240425073119.GA3261080@rayden
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

8 files changed, 15 insertions, 92 deletions

diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
index a91e50be11be..16eb953e14bb 100644
--- a/drivers/tee/optee/call.c
+++ b/drivers/tee/optee/call.c
@@ -7,7 +7,7 @@
 #include <linux/errno.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/types.h>
 #include "optee_private.h"
 
diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
index 3aed554bc8d8..39e688d4e974 100644
--- a/drivers/tee/optee/core.c
+++ b/drivers/tee/optee/core.c
@@ -9,77 +9,13 @@
 #include <linux/crash_dump.h>
 #include <linux/errno.h>
 #include <linux/io.h>
-#include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/string.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/types.h>
 #include "optee_private.h"
 
-int optee_pool_op_alloc_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
-			       size_t size, size_t align,
-			       int (*shm_register)(struct tee_context *ctx,
-						   struct tee_shm *shm,
-						   struct page **pages,
-						   size_t num_pages,
-						   unsigned long start))
-{
-	size_t nr_pages = roundup(size, PAGE_SIZE) / PAGE_SIZE;
-	struct page **pages;
-	unsigned int i;
-	int rc = 0;
-
-	/*
-	 * Ignore alignment since this is already going to be page aligned
-	 * and there's no need for any larger alignment.
-	 */
-	shm->kaddr = alloc_pages_exact(nr_pages * PAGE_SIZE,
-				       GFP_KERNEL | __GFP_ZERO);
-	if (!shm->kaddr)
-		return -ENOMEM;
-
-	shm->paddr = virt_to_phys(shm->kaddr);
-	shm->size = nr_pages * PAGE_SIZE;
-
-	pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL);
-	if (!pages) {
-		rc = -ENOMEM;
-		goto err;
-	}
-
-	for (i = 0; i < nr_pages; i++)
-		pages[i] = virt_to_page((u8 *)shm->kaddr + i * PAGE_SIZE);
-
-	shm->pages = pages;
-	shm->num_pages = nr_pages;
-
-	if (shm_register) {
-		rc = shm_register(shm->ctx, shm, pages, nr_pages,
-				  (unsigned long)shm->kaddr);
-		if (rc)
-			goto err;
-	}
-
-	return 0;
-err:
-	free_pages_exact(shm->kaddr, shm->size);
-	shm->kaddr = NULL;
-	return rc;
-}
-
-void optee_pool_op_free_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
-			       int (*shm_unregister)(struct tee_context *ctx,
-						     struct tee_shm *shm))
-{
-	if (shm_unregister)
-		shm_unregister(shm->ctx, shm);
-	free_pages_exact(shm->kaddr, shm->size);
-	shm->kaddr = NULL;
-	kfree(shm->pages);
-	shm->pages = NULL;
-}
-
 static void optee_bus_scan(struct work_struct *work)
 {
 	WARN_ON(optee_enumerate_devices(PTA_CMD_GET_DEVICES_SUPP));
diff --git a/drivers/tee/optee/device.c b/drivers/tee/optee/device.c
index 1892e49a8e6a..d296c70ddfdc 100644
--- a/drivers/tee/optee/device.c
+++ b/drivers/tee/optee/device.c
@@ -7,7 +7,7 @@
 
 #include <linux/kernel.h>
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/uuid.h>
 #include "optee_private.h"
 
diff --git a/drivers/tee/optee/ffa_abi.c b/drivers/tee/optee/ffa_abi.c
index ecb5eb079408..3235e1c719e8 100644
--- a/drivers/tee/optee/ffa_abi.c
+++ b/drivers/tee/optee/ffa_abi.c
@@ -11,7 +11,7 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/string.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/types.h>
 #include "optee_private.h"
 #include "optee_ffa.h"
@@ -374,14 +374,14 @@ static int optee_ffa_shm_unregister_supp(struct tee_context *ctx,
 static int pool_ffa_op_alloc(struct tee_shm_pool *pool,
 			     struct tee_shm *shm, size_t size, size_t align)
 {
-	return optee_pool_op_alloc_helper(pool, shm, size, align,
-					  optee_ffa_shm_register);
+	return tee_dyn_shm_alloc_helper(shm, size, align,
+					optee_ffa_shm_register);
 }
 
 static void pool_ffa_op_free(struct tee_shm_pool *pool,
 			     struct tee_shm *shm)
 {
-	optee_pool_op_free_helper(pool, shm, optee_ffa_shm_unregister);
+	tee_dyn_shm_free_helper(shm, optee_ffa_shm_unregister);
 }
 
 static void pool_ffa_op_destroy_pool(struct tee_shm_pool *pool)
diff --git a/drivers/tee/optee/notif.c b/drivers/tee/optee/notif.c
index 05212842b0a5..0d7878e770cd 100644
--- a/drivers/tee/optee/notif.c
+++ b/drivers/tee/optee/notif.c
@@ -9,7 +9,7 @@
 #include <linux/errno.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include "optee_private.h"
 
 struct notif_entry {
diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h
index 7a5243c78b55..429cc20be5cc 100644
--- a/drivers/tee/optee/optee_private.h
+++ b/drivers/tee/optee/optee_private.h
@@ -9,7 +9,7 @@
 #include <linux/arm-smccc.h>
 #include <linux/rhashtable.h>
 #include <linux/semaphore.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/types.h>
 #include "optee_msg.h"
 
@@ -283,18 +283,6 @@ int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session);
 int optee_enumerate_devices(u32 func);
 void optee_unregister_devices(void);
 
-int optee_pool_op_alloc_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
-			       size_t size, size_t align,
-			       int (*shm_register)(struct tee_context *ctx,
-						   struct tee_shm *shm,
-						   struct page **pages,
-						   size_t num_pages,
-						   unsigned long start));
-void optee_pool_op_free_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
-			       int (*shm_unregister)(struct tee_context *ctx,
-						     struct tee_shm *shm));
-
-
 void optee_remove_common(struct optee *optee);
 int optee_open(struct tee_context *ctx, bool cap_memref_null);
 void optee_release(struct tee_context *ctx);
diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c
index e69bc6380683..f086812f1179 100644
--- a/drivers/tee/optee/rpc.c
+++ b/drivers/tee/optee/rpc.c
@@ -8,7 +8,7 @@
 #include <linux/delay.h>
 #include <linux/i2c.h>
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include "optee_private.h"
 #include "optee_rpc_cmd.h"
 
diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c
index c82b7b88991d..844285d4f03c 100644
--- a/drivers/tee/optee/smc_abi.c
+++ b/drivers/tee/optee/smc_abi.c
@@ -23,7 +23,7 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/string.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/types.h>
 #include <linux/workqueue.h>
 #include "optee_private.h"
@@ -592,19 +592,18 @@ static int pool_op_alloc(struct tee_shm_pool *pool,
 	 * to be registered with OP-TEE.
 	 */
 	if (shm->flags & TEE_SHM_PRIV)
-		return optee_pool_op_alloc_helper(pool, shm, size, align, NULL);
+		return tee_dyn_shm_alloc_helper(shm, size, align, NULL);
 
-	return optee_pool_op_alloc_helper(pool, shm, size, align,
-					  optee_shm_register);
+	return tee_dyn_shm_alloc_helper(shm, size, align, optee_shm_register);
 }
 
 static void pool_op_free(struct tee_shm_pool *pool,
 			 struct tee_shm *shm)
 {
 	if (!(shm->flags & TEE_SHM_PRIV))
-		optee_pool_op_free_helper(pool, shm, optee_shm_unregister);
+		tee_dyn_shm_free_helper(shm, optee_shm_unregister);
 	else
-		optee_pool_op_free_helper(pool, shm, NULL);
+		tee_dyn_shm_free_helper(shm, NULL);
 }
 
 static void pool_op_destroy_pool(struct tee_shm_pool *pool)