[PATCH v6 05/10] iommufd: Derive iommufd_hwpt_paging from iommufd_hw_pagetable

Yi Liu
2023-10-24T15:10:05Z

From: Nicolin Chen <nicolinc@nvidia.com>

To prepare for IOMMUFD_OBJ_HWPT_NESTED, derive struct iommufd_hwpt_paging
from struct iommufd_hw_pagetable, by leaving the common members in struct
iommufd_hw_pagetable. Add a __iommufd_object_alloc and to_hwpt_paging()
helpers for the new structure.

Then, update "hwpt" to "hwpt_paging" throughout the files, accordingly.

Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
drivers/iommu/iommufd/device.c | 74 ++++++++------
drivers/iommu/iommufd/hw_pagetable.c | 129 +++++++++++++-----------
drivers/iommu/iommufd/iommufd_private.h | 41 +++++---
drivers/iommu/iommufd/main.c | 4 +-
drivers/iommu/iommufd/vfio_compat.c | 6 +-
5 files changed, 148 insertions(+), 106 deletions(-)

diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c
index 5bcc15cd54a1..902288ca910d 100644
--- a/drivers/iommu/iommufd/device.c
+++ b/drivers/iommu/iommufd/device.c
@@ -293,7 +293,7 @@ u32 iommufd_device_to_id(struct iommufd_device *idev)
EXPORT_SYMBOL_NS_GPL(iommufd_device_to_id, IOMMUFD);

static int iommufd_group_setup_msi(struct iommufd_group *igroup,
- struct iommufd_hw_pagetable *hwpt)
+ struct iommufd_hwpt_paging *hwpt_paging)
{
phys_addr_t sw_msi_start = igroup->sw_msi_start;
int rc;
@@ -311,8 +311,9 @@ static int iommufd_group_setup_msi(struct iommufd_group *igroup,
* matches what the IRQ layer actually expects in a newly created
* domain.
*/
- if (sw_msi_start != PHYS_ADDR_MAX && !hwpt->msi_cookie) {
- rc = iommu_get_msi_cookie(hwpt->domain, sw_msi_start);
+ if (sw_msi_start != PHYS_ADDR_MAX && !hwpt_paging->msi_cookie) {
+ rc = iommu_get_msi_cookie(hwpt_paging->common.domain,
+ sw_msi_start);
if (rc)
return rc;

@@ -320,27 +321,29 @@ static int iommufd_group_setup_msi(struct iommufd_group *igroup,
* iommu_get_msi_cookie() can only be called once per domain,
* it returns -EBUSY on later calls.
*/
- hwpt->msi_cookie = true;
+ hwpt_paging->msi_cookie = true;
}
return 0;
}

-static int iommufd_hwpt_paging_attach(struct iommufd_hw_pagetable *hwpt,
+static int iommufd_hwpt_paging_attach(struct iommufd_hwpt_paging *hwpt_paging,
struct iommufd_device *idev)
{
int rc;

lockdep_assert_held(&idev->igroup->lock);

- rc = iopt_table_enforce_dev_resv_regions(&hwpt->ioas->iopt, idev->dev,
+ rc = iopt_table_enforce_dev_resv_regions(&hwpt_paging->ioas->iopt,
+ idev->dev,
&idev->igroup->sw_msi_start);
if (rc)
return rc;

if (list_empty(&idev->igroup->device_list)) {
- rc = iommufd_group_setup_msi(idev->igroup, hwpt);
+ rc = iommufd_group_setup_msi(idev->igroup, hwpt_paging);
if (rc) {
- iopt_remove_reserved_iova(&hwpt->ioas->iopt, idev->dev);
+ iopt_remove_reserved_iova(&hwpt_paging->ioas->iopt,
+ idev->dev);
return rc;
}
}
@@ -360,7 +363,7 @@ int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt,
}

if (hwpt_is_paging(hwpt)) {
- rc = iommufd_hwpt_paging_attach(hwpt, idev);
+ rc = iommufd_hwpt_paging_attach(to_hwpt_paging(hwpt), idev);
if (rc)
goto err_unlock;
}
@@ -384,7 +387,8 @@ int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt,
return 0;
err_unresv:
if (hwpt_is_paging(hwpt))
- iopt_remove_reserved_iova(&hwpt->ioas->iopt, idev->dev);
+ iopt_remove_reserved_iova(&to_hwpt_paging(hwpt)->ioas->iopt,
+ idev->dev);
err_unlock:
mutex_unlock(&idev->igroup->lock);
return rc;
@@ -402,7 +406,8 @@ iommufd_hw_pagetable_detach(struct iommufd_device *idev)
idev->igroup->hwpt = NULL;
}
if (hwpt_is_paging(hwpt))
- iopt_remove_reserved_iova(&hwpt->ioas->iopt, idev->dev);
+ iopt_remove_reserved_iova(&to_hwpt_paging(hwpt)->ioas->iopt,
+ idev->dev);
mutex_unlock(&idev->igroup->lock);

/* Caller must destroy hwpt */
@@ -421,19 +426,20 @@ iommufd_device_do_attach(struct iommufd_device *idev,
return NULL;
}

-static void iommufd_group_remove_reserved_iova(struct iommufd_group *igroup,
- struct iommufd_hw_pagetable *hwpt)
+static void
+iommufd_group_remove_reserved_iova(struct iommufd_group *igroup,
+ struct iommufd_hwpt_paging *hwpt_paging)
{
struct iommufd_device *cur;

lockdep_assert_held(&igroup->lock);

list_for_each_entry(cur, &igroup->device_list, group_item)
- iopt_remove_reserved_iova(&hwpt->ioas->iopt, cur->dev);
+ iopt_remove_reserved_iova(&hwpt_paging->ioas->iopt, cur->dev);
}

static int iommufd_group_do_replace_paging(struct iommufd_group *igroup,
- struct iommufd_hw_pagetable *hwpt)
+ struct iommufd_hwpt_paging *hwpt_paging)
{
struct iommufd_hw_pagetable *old_hwpt = igroup->hwpt;
struct iommufd_device *cur;
@@ -441,22 +447,23 @@ static int iommufd_group_do_replace_paging(struct iommufd_group *igroup,

lockdep_assert_held(&igroup->lock);

- if (hwpt_is_paging(old_hwpt) && hwpt->ioas != old_hwpt->ioas) {
+ if (hwpt_is_paging(old_hwpt) &&
+ hwpt_paging->ioas != to_hwpt_paging(old_hwpt)->ioas) {
list_for_each_entry(cur, &igroup->device_list, group_item) {
rc = iopt_table_enforce_dev_resv_regions(
- &hwpt->ioas->iopt, cur->dev, NULL);
+ &hwpt_paging->ioas->iopt, cur->dev, NULL);
if (rc)
goto err_unresv;
}
}

- rc = iommufd_group_setup_msi(igroup, hwpt);
+ rc = iommufd_group_setup_msi(igroup, hwpt_paging);
if (rc)
goto err_unresv;
return 0;

err_unresv:
- iommufd_group_remove_reserved_iova(igroup, hwpt);
+ iommufd_group_remove_reserved_iova(igroup, hwpt_paging);
return rc;
}

@@ -482,7 +489,8 @@ iommufd_device_do_replace(struct iommufd_device *idev,
}

if (hwpt_is_paging(hwpt)) {
- rc = iommufd_group_do_replace_paging(igroup, hwpt);
+ rc = iommufd_group_do_replace_paging(igroup,
+ to_hwpt_paging(hwpt));
if (rc)
goto err_unlock;
}
@@ -493,8 +501,10 @@ iommufd_device_do_replace(struct iommufd_device *idev,

old_hwpt = igroup->hwpt;
if (hwpt_is_paging(old_hwpt) &&
- (!hwpt_is_paging(hwpt) || hwpt->ioas != old_hwpt->ioas))
- iommufd_group_remove_reserved_iova(igroup, old_hwpt);
+ (!hwpt_is_paging(hwpt) ||
+ to_hwpt_paging(hwpt)->ioas != to_hwpt_paging(old_hwpt)->ioas))
+ iommufd_group_remove_reserved_iova(igroup,
+ to_hwpt_paging(old_hwpt));

igroup->hwpt = hwpt;

@@ -513,7 +523,8 @@ iommufd_device_do_replace(struct iommufd_device *idev,
return old_hwpt;
err_unresv:
if (hwpt_is_paging(hwpt))
- iommufd_group_remove_reserved_iova(igroup, hwpt);
+ iommufd_group_remove_reserved_iova(igroup,
+ to_hwpt_paging(old_hwpt));
err_unlock:
mutex_unlock(&idev->igroup->lock);
return ERR_PTR(rc);
@@ -541,6 +552,7 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev,
*/
bool immediate_attach = do_attach == iommufd_device_do_attach;
struct iommufd_hw_pagetable *destroy_hwpt;
+ struct iommufd_hwpt_paging *hwpt_paging;
struct iommufd_hw_pagetable *hwpt;

/*
@@ -549,10 +561,11 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev,
* other.
*/
mutex_lock(&ioas->mutex);
- list_for_each_entry(hwpt, &ioas->hwpt_list, hwpt_item) {
- if (!hwpt->auto_domain)
+ list_for_each_entry(hwpt_paging, &ioas->hwpt_list, hwpt_item) {
+ if (!hwpt_paging->auto_domain)
continue;

+ hwpt = &hwpt_paging->common;
if (!iommufd_lock_obj(&hwpt->obj))
continue;
destroy_hwpt = (*do_attach)(idev, hwpt);
@@ -573,12 +586,13 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev,
goto out_unlock;
}

- hwpt = iommufd_hw_pagetable_alloc(idev->ictx, ioas, idev,
- 0, immediate_attach);
- if (IS_ERR(hwpt)) {
- destroy_hwpt = ERR_CAST(hwpt);
+ hwpt_paging = iommufd_hwpt_paging_alloc(idev->ictx, ioas, idev,
+ 0, immediate_attach);
+ if (IS_ERR(hwpt_paging)) {
+ destroy_hwpt = ERR_CAST(hwpt_paging);
goto out_unlock;
}
+ hwpt = &hwpt_paging->common;

if (!immediate_attach) {
destroy_hwpt = (*do_attach)(idev, hwpt);
@@ -588,7 +602,7 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev,
destroy_hwpt = NULL;
}

- hwpt->auto_domain = true;
+ hwpt_paging->auto_domain = true;
*pt_id = hwpt->obj.id;

iommufd_object_finalize(idev->ictx, &hwpt->obj);
diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c
index 1c13c3b6368c..ddce4189753f 100644
--- a/drivers/iommu/iommufd/hw_pagetable.c
+++ b/drivers/iommu/iommufd/hw_pagetable.c
@@ -8,56 +8,61 @@
#include "../iommu-priv.h"
#include "iommufd_private.h"

-void iommufd_hw_pagetable_destroy(struct iommufd_object *obj)
+void iommufd_hwpt_paging_destroy(struct iommufd_object *obj)
{
- struct iommufd_hw_pagetable *hwpt =
- container_of(obj, struct iommufd_hw_pagetable, obj);
+ struct iommufd_hwpt_paging *hwpt_paging =
+ container_of(obj, struct iommufd_hwpt_paging, common.obj);

- if (!list_empty(&hwpt->hwpt_item)) {
- mutex_lock(&hwpt->ioas->mutex);
- list_del(&hwpt->hwpt_item);
- mutex_unlock(&hwpt->ioas->mutex);
+ if (!list_empty(&hwpt_paging->hwpt_item)) {
+ mutex_lock(&hwpt_paging->ioas->mutex);
+ list_del(&hwpt_paging->hwpt_item);
+ mutex_unlock(&hwpt_paging->ioas->mutex);

- iopt_table_remove_domain(&hwpt->ioas->iopt, hwpt->domain);
+ iopt_table_remove_domain(&hwpt_paging->ioas->iopt,
+ hwpt_paging->common.domain);
}

- if (hwpt->domain)
- iommu_domain_free(hwpt->domain);
+ if (hwpt_paging->common.domain)
+ iommu_domain_free(hwpt_paging->common.domain);

- refcount_dec(&hwpt->ioas->obj.users);
+ refcount_dec(&hwpt_paging->ioas->obj.users);
}

-void iommufd_hw_pagetable_abort(struct iommufd_object *obj)
+void iommufd_hwpt_paging_abort(struct iommufd_object *obj)
{
- struct iommufd_hw_pagetable *hwpt =
- container_of(obj, struct iommufd_hw_pagetable, obj);
+ struct iommufd_hwpt_paging *hwpt_paging =
+ container_of(obj, struct iommufd_hwpt_paging, common.obj);

/* The ioas->mutex must be held until finalize is called. */
- lockdep_assert_held(&hwpt->ioas->mutex);
+ lockdep_assert_held(&hwpt_paging->ioas->mutex);

- if (!list_empty(&hwpt->hwpt_item)) {
- list_del_init(&hwpt->hwpt_item);
- iopt_table_remove_domain(&hwpt->ioas->iopt, hwpt->domain);
+ if (!list_empty(&hwpt_paging->hwpt_item)) {
+ list_del_init(&hwpt_paging->hwpt_item);
+ iopt_table_remove_domain(&hwpt_paging->ioas->iopt,
+ hwpt_paging->common.domain);
}
- iommufd_hw_pagetable_destroy(obj);
+ iommufd_hwpt_paging_destroy(obj);
}

-static int iommufd_hw_pagetable_enforce_cc(struct iommufd_hw_pagetable *hwpt)
+static int
+iommufd_hwpt_paging_enforce_cc(struct iommufd_hwpt_paging *hwpt_paging)
{
- if (hwpt->enforce_cache_coherency)
+ struct iommu_domain *paging_domain = hwpt_paging->common.domain;
+
+ if (hwpt_paging->enforce_cache_coherency)
return 0;

- if (hwpt->domain->ops->enforce_cache_coherency)
- hwpt->enforce_cache_coherency =
- hwpt->domain->ops->enforce_cache_coherency(
- hwpt->domain);
- if (!hwpt->enforce_cache_coherency)
+ if (paging_domain->ops->enforce_cache_coherency)
+ hwpt_paging->enforce_cache_coherency =
+ paging_domain->ops->enforce_cache_coherency(
+ paging_domain);
+ if (!hwpt_paging->enforce_cache_coherency)
return -EINVAL;
return 0;
}

/**
- * iommufd_hw_pagetable_alloc() - Get an iommu_domain for a device
+ * iommufd_hwpt_paging_alloc() - Get a PAGING iommu_domain for a device
* @ictx: iommufd context
* @ioas: IOAS to associate the domain with
* @idev: Device to get an iommu_domain for
@@ -72,12 +77,13 @@ static int iommufd_hw_pagetable_enforce_cc(struct iommufd_hw_pagetable *hwpt)
* iommufd_object_abort_and_destroy() or iommufd_object_finalize() is called on
* the returned hwpt.
*/
-struct iommufd_hw_pagetable *
-iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
- struct iommufd_device *idev, u32 flags,
- bool immediate_attach)
+struct iommufd_hwpt_paging *
+iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
+ struct iommufd_device *idev, u32 flags,
+ bool immediate_attach)
{
const struct iommu_ops *ops = dev_iommu_ops(idev->dev);
+ struct iommufd_hwpt_paging *hwpt_paging;
struct iommufd_hw_pagetable *hwpt;
int rc;

@@ -86,14 +92,17 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
if (flags && !ops->domain_alloc_user)
return ERR_PTR(-EOPNOTSUPP);

- hwpt = iommufd_object_alloc(ictx, hwpt, IOMMUFD_OBJ_HWPT_PAGING);
- if (IS_ERR(hwpt))
- return hwpt;
+ hwpt_paging = __iommufd_object_alloc(ictx, hwpt_paging,
+ IOMMUFD_OBJ_HWPT_PAGING,
+ common.obj);
+ if (IS_ERR(hwpt_paging))
+ return ERR_CAST(hwpt_paging);
+ hwpt = &hwpt_paging->common;

- INIT_LIST_HEAD(&hwpt->hwpt_item);
+ INIT_LIST_HEAD(&hwpt_paging->hwpt_item);
/* Pairs with iommufd_hw_pagetable_destroy() */
refcount_inc(&ioas->obj.users);
- hwpt->ioas = ioas;
+ hwpt_paging->ioas = ioas;

if (ops->domain_alloc_user) {
hwpt->domain = ops->domain_alloc_user(idev->dev, flags,
@@ -126,7 +135,7 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
* allocate a separate HWPT (non-CC).
*/
if (idev->enforce_cache_coherency) {
- rc = iommufd_hw_pagetable_enforce_cc(hwpt);
+ rc = iommufd_hwpt_paging_enforce_cc(hwpt_paging);
if (WARN_ON(rc))
goto out_abort;
}
@@ -143,11 +152,11 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
goto out_abort;
}

- rc = iopt_table_add_domain(&hwpt->ioas->iopt, hwpt->domain);
+ rc = iopt_table_add_domain(&ioas->iopt, hwpt->domain);
if (rc)
goto out_detach;
- list_add_tail(&hwpt->hwpt_item, &hwpt->ioas->hwpt_list);
- return hwpt;
+ list_add_tail(&hwpt_paging->hwpt_item, &ioas->hwpt_list);
+ return hwpt_paging;

out_detach:
if (immediate_attach)
@@ -160,6 +169,7 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd)
{
struct iommu_hwpt_alloc *cmd = ucmd->cmd;
+ struct iommufd_hwpt_paging *hwpt_paging;
struct iommufd_hw_pagetable *hwpt;
struct iommufd_device *idev;
struct iommufd_ioas *ioas;
@@ -181,12 +191,13 @@ int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd)
}

mutex_lock(&ioas->mutex);
- hwpt = iommufd_hw_pagetable_alloc(ucmd->ictx, ioas,
- idev, cmd->flags, false);
- if (IS_ERR(hwpt)) {
- rc = PTR_ERR(hwpt);
+ hwpt_paging = iommufd_hwpt_paging_alloc(ucmd->ictx, ioas, idev,
+ cmd->flags, false);
+ if (IS_ERR(hwpt_paging)) {
+ rc = PTR_ERR(hwpt_paging);
goto out_unlock;
}
+ hwpt = &hwpt_paging->common;

cmd->out_hwpt_id = hwpt->obj.id;
rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd));
@@ -208,7 +219,7 @@ int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd)
int iommufd_hwpt_set_dirty_tracking(struct iommufd_ucmd *ucmd)
{
struct iommu_hwpt_set_dirty_tracking *cmd = ucmd->cmd;
- struct iommufd_hw_pagetable *hwpt;
+ struct iommufd_hwpt_paging *hwpt_paging;
struct iommufd_ioas *ioas;
int rc = -EOPNOTSUPP;
bool enable;
@@ -216,23 +227,24 @@ int iommufd_hwpt_set_dirty_tracking(struct iommufd_ucmd *ucmd)
if (cmd->flags & ~IOMMU_HWPT_DIRTY_TRACKING_ENABLE)
return rc;

- hwpt = iommufd_get_hwpt(ucmd, cmd->hwpt_id);
- if (IS_ERR(hwpt))
- return PTR_ERR(hwpt);
+ hwpt_paging = iommufd_get_hwpt_paging(ucmd, cmd->hwpt_id);
+ if (IS_ERR(hwpt_paging))
+ return PTR_ERR(hwpt_paging);

- ioas = hwpt->ioas;
+ ioas = hwpt_paging->ioas;
enable = cmd->flags & IOMMU_HWPT_DIRTY_TRACKING_ENABLE;

- rc = iopt_set_dirty_tracking(&ioas->iopt, hwpt->domain, enable);
+ rc = iopt_set_dirty_tracking(&ioas->iopt,
+ hwpt_paging->common.domain, enable);

- iommufd_put_object(&hwpt->obj);
+ iommufd_put_object(&hwpt_paging->common.obj);
return rc;
}

int iommufd_hwpt_get_dirty_bitmap(struct iommufd_ucmd *ucmd)
{
struct iommu_hwpt_get_dirty_bitmap *cmd = ucmd->cmd;
- struct iommufd_hw_pagetable *hwpt;
+ struct iommufd_hwpt_paging *hwpt_paging;
struct iommufd_ioas *ioas;
int rc = -EOPNOTSUPP;

@@ -240,14 +252,15 @@ int iommufd_hwpt_get_dirty_bitmap(struct iommufd_ucmd *ucmd)
cmd->__reserved)
return -EOPNOTSUPP;

- hwpt = iommufd_get_hwpt(ucmd, cmd->hwpt_id);
- if (IS_ERR(hwpt))
- return PTR_ERR(hwpt);
+ hwpt_paging = iommufd_get_hwpt_paging(ucmd, cmd->hwpt_id);
+ if (IS_ERR(hwpt_paging))
+ return PTR_ERR(hwpt_paging);

- ioas = hwpt->ioas;
- rc = iopt_read_and_clear_dirty_data(&ioas->iopt, hwpt->domain,
+ ioas = hwpt_paging->ioas;
+ rc = iopt_read_and_clear_dirty_data(&ioas->iopt,
+ hwpt_paging->common.domain,
cmd->flags, cmd);

- iommufd_put_object(&hwpt->obj);
+ iommufd_put_object(&hwpt_paging->common.obj);
return rc;
}
diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h
index 776dd41c077f..6493fcdad1b7 100644
--- a/drivers/iommu/iommufd/iommufd_private.h
+++ b/drivers/iommu/iommufd/iommufd_private.h
@@ -181,7 +181,7 @@ struct iommufd_object *_iommufd_object_alloc(struct iommufd_ctx *ictx,
size_t size,
enum iommufd_object_type type);

-#define iommufd_object_alloc(ictx, ptr, type) \
+#define __iommufd_object_alloc(ictx, ptr, type, obj) \
container_of(_iommufd_object_alloc( \
ictx, \
sizeof(*(ptr)) + BUILD_BUG_ON_ZERO( \
@@ -190,6 +190,9 @@ struct iommufd_object *_iommufd_object_alloc(struct iommufd_ctx *ictx,
type), \
typeof(*(ptr)), obj)

+#define iommufd_object_alloc(ictx, ptr, type) \
+ __iommufd_object_alloc(ictx, ptr, type, obj)
+
/*
* The IO Address Space (IOAS) pagetable is a virtual page table backed by the
* io_pagetable object. It is a user controlled mapping of IOVA -> PFNs. The
@@ -243,8 +246,12 @@ int iommufd_check_iova_range(struct io_pagetable *iopt,
*/
struct iommufd_hw_pagetable {
struct iommufd_object obj;
- struct iommufd_ioas *ioas;
struct iommu_domain *domain;
+};
+
+struct iommufd_hwpt_paging {
+ struct iommufd_hw_pagetable common;
+ struct iommufd_ioas *ioas;
bool auto_domain : 1;
bool enforce_cache_coherency : 1;
bool msi_cookie : 1;
@@ -257,33 +264,41 @@ static inline bool hwpt_is_paging(struct iommufd_hw_pagetable *hwpt)
return hwpt->obj.type == IOMMUFD_OBJ_HWPT_PAGING;
}

-static inline struct iommufd_hw_pagetable *
-iommufd_get_hwpt(struct iommufd_ucmd *ucmd, u32 id)
+static inline struct iommufd_hwpt_paging *
+to_hwpt_paging(struct iommufd_hw_pagetable *hwpt)
+{
+ return container_of(hwpt, struct iommufd_hwpt_paging, common);
+}
+
+static inline struct iommufd_hwpt_paging *
+iommufd_get_hwpt_paging(struct iommufd_ucmd *ucmd, u32 id)
{
return container_of(iommufd_get_object(ucmd->ictx, id,
IOMMUFD_OBJ_HWPT_PAGING),
- struct iommufd_hw_pagetable, obj);
+ struct iommufd_hwpt_paging, common.obj);
}
int iommufd_hwpt_set_dirty_tracking(struct iommufd_ucmd *ucmd);
int iommufd_hwpt_get_dirty_bitmap(struct iommufd_ucmd *ucmd);

-struct iommufd_hw_pagetable *
-iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
- struct iommufd_device *idev, u32 flags,
- bool immediate_attach);
+struct iommufd_hwpt_paging *
+iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
+ struct iommufd_device *idev, u32 flags,
+ bool immediate_attach);
int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt,
struct iommufd_device *idev);
struct iommufd_hw_pagetable *
iommufd_hw_pagetable_detach(struct iommufd_device *idev);
-void iommufd_hw_pagetable_destroy(struct iommufd_object *obj);
-void iommufd_hw_pagetable_abort(struct iommufd_object *obj);
+void iommufd_hwpt_paging_destroy(struct iommufd_object *obj);
+void iommufd_hwpt_paging_abort(struct iommufd_object *obj);
int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd);

static inline void iommufd_hw_pagetable_put(struct iommufd_ctx *ictx,
struct iommufd_hw_pagetable *hwpt)
{
- lockdep_assert_not_held(&hwpt->ioas->mutex);
- if (hwpt->auto_domain)
+ struct iommufd_hwpt_paging *hwpt_paging = to_hwpt_paging(hwpt);
+
+ lockdep_assert_not_held(&hwpt_paging->ioas->mutex);
+ if (hwpt_paging->auto_domain)
iommufd_object_deref_user(ictx, &hwpt->obj);
else
refcount_dec(&hwpt->obj.users);
diff --git a/drivers/iommu/iommufd/main.c b/drivers/iommu/iommufd/main.c
index 46198e8948d6..ab6675a7f6b4 100644
--- a/drivers/iommu/iommufd/main.c
+++ b/drivers/iommu/iommufd/main.c
@@ -489,8 +489,8 @@ static const struct iommufd_object_ops iommufd_object_ops[] = {
.destroy = iommufd_ioas_destroy,
},
[IOMMUFD_OBJ_HWPT_PAGING] = {
- .destroy = iommufd_hw_pagetable_destroy,
- .abort = iommufd_hw_pagetable_abort,
+ .destroy = iommufd_hwpt_paging_destroy,
+ .abort = iommufd_hwpt_paging_abort,
},
#ifdef CONFIG_IOMMUFD_TEST
[IOMMUFD_OBJ_SELFTEST] = {
diff --git a/drivers/iommu/iommufd/vfio_compat.c b/drivers/iommu/iommufd/vfio_compat.c
index 6c810bf80f99..538fbf76354d 100644
--- a/drivers/iommu/iommufd/vfio_compat.c
+++ b/drivers/iommu/iommufd/vfio_compat.c
@@ -255,7 +255,7 @@ static int iommufd_vfio_unmap_dma(struct iommufd_ctx *ictx, unsigned int cmd,

static int iommufd_vfio_cc_iommu(struct iommufd_ctx *ictx)
{
- struct iommufd_hw_pagetable *hwpt;
+ struct iommufd_hwpt_paging *hwpt_paging;
struct iommufd_ioas *ioas;
int rc = 1;

@@ -264,8 +264,8 @@ static int iommufd_vfio_cc_iommu(struct iommufd_ctx *ictx)
return PTR_ERR(ioas);

mutex_lock(&ioas->mutex);
- list_for_each_entry(hwpt, &ioas->hwpt_list, hwpt_item) {
- if (!hwpt->enforce_cache_coherency) {
+ list_for_each_entry(hwpt_paging, &ioas->hwpt_list, hwpt_item) {
+ if (!hwpt_paging->enforce_cache_coherency) {
rc = 0;
break;
}
--
2.34.1