[PATCH v4 07/12] iommu/arm-smmu-v3: Expose the arm_smmu_attach interface

Jason Gunthorpe
2024-10-31T00:21:19Z

The arm-smmuv3-iommufd.c file will need to call these functions too.
Remove statics and put them in the header file. Remove the kunit
visibility protections from arm_smmu_make_abort_ste() and
arm_smmu_make_s2_domain_ste().

Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Mostafa Saleh <smostafa@google.com>
Reviewed-by: Donald Dutile <ddutile@redhat.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 22 ++++-------------
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 27 +++++++++++++++++----
2 files changed, 27 insertions(+), 22 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 80847fa386fcd2..b4b03206afbf48 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1549,7 +1549,6 @@ static void arm_smmu_write_ste(struct arm_smmu_master *master, u32 sid,
}
}

-VISIBLE_IF_KUNIT
void arm_smmu_make_abort_ste(struct arm_smmu_ste *target)
{
memset(target, 0, sizeof(*target));
@@ -1632,7 +1631,6 @@ void arm_smmu_make_cdtable_ste(struct arm_smmu_ste *target,
}
EXPORT_SYMBOL_IF_KUNIT(arm_smmu_make_cdtable_ste);

-VISIBLE_IF_KUNIT
void arm_smmu_make_s2_domain_ste(struct arm_smmu_ste *target,
struct arm_smmu_master *master,
struct arm_smmu_domain *smmu_domain,
@@ -2505,8 +2503,8 @@ arm_smmu_get_step_for_sid(struct arm_smmu_device *smmu, u32 sid)
}
}

-static void arm_smmu_install_ste_for_dev(struct arm_smmu_master *master,
- const struct arm_smmu_ste *target)
+void arm_smmu_install_ste_for_dev(struct arm_smmu_master *master,
+ const struct arm_smmu_ste *target)
{
int i, j;
struct arm_smmu_device *smmu = master->smmu;
@@ -2671,16 +2669,6 @@ static void arm_smmu_remove_master_domain(struct arm_smmu_master *master,
spin_unlock_irqrestore(&smmu_domain->devices_lock, flags);
}

-struct arm_smmu_attach_state {
- /* Inputs */
- struct iommu_domain *old_domain;
- struct arm_smmu_master *master;
- bool cd_needs_ats;
- ioasid_t ssid;
- /* Resulting state */
- bool ats_enabled;
-};
-
/*
* Start the sequence to attach a domain to a master. The sequence contains three
* steps:
@@ -2701,8 +2689,8 @@ struct arm_smmu_attach_state {
* new_domain can be a non-paging domain. In this case ATS will not be enabled,
* and invalidations won't be tracked.
*/
-static int arm_smmu_attach_prepare(struct arm_smmu_attach_state *state,
- struct iommu_domain *new_domain)
+int arm_smmu_attach_prepare(struct arm_smmu_attach_state *state,
+ struct iommu_domain *new_domain)
{
struct arm_smmu_master *master = state->master;
struct arm_smmu_master_domain *master_domain;
@@ -2784,7 +2772,7 @@ static int arm_smmu_attach_prepare(struct arm_smmu_attach_state *state,
* completes synchronizing the PCI device's ATC and finishes manipulating the
* smmu_domain->devices list.
*/
-static void arm_smmu_attach_commit(struct arm_smmu_attach_state *state)
+void arm_smmu_attach_commit(struct arm_smmu_attach_state *state)
{
struct arm_smmu_master *master = state->master;

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
index 66261fd5bfb2d2..c9e5290e995a64 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
@@ -830,21 +830,22 @@ struct arm_smmu_entry_writer_ops {
void (*sync)(struct arm_smmu_entry_writer *writer);
};

+void arm_smmu_make_abort_ste(struct arm_smmu_ste *target);
+void arm_smmu_make_s2_domain_ste(struct arm_smmu_ste *target,
+ struct arm_smmu_master *master,
+ struct arm_smmu_domain *smmu_domain,
+ bool ats_enabled);
+
#if IS_ENABLED(CONFIG_KUNIT)
void arm_smmu_get_ste_used(const __le64 *ent, __le64 *used_bits);
void arm_smmu_write_entry(struct arm_smmu_entry_writer *writer, __le64 *cur,
const __le64 *target);
void arm_smmu_get_cd_used(const __le64 *ent, __le64 *used_bits);
-void arm_smmu_make_abort_ste(struct arm_smmu_ste *target);
void arm_smmu_make_bypass_ste(struct arm_smmu_device *smmu,
struct arm_smmu_ste *target);
void arm_smmu_make_cdtable_ste(struct arm_smmu_ste *target,
struct arm_smmu_master *master, bool ats_enabled,
unsigned int s1dss);
-void arm_smmu_make_s2_domain_ste(struct arm_smmu_ste *target,
- struct arm_smmu_master *master,
- struct arm_smmu_domain *smmu_domain,
- bool ats_enabled);
void arm_smmu_make_sva_cd(struct arm_smmu_cd *target,
struct arm_smmu_master *master, struct mm_struct *mm,
u16 asid);
@@ -902,6 +903,22 @@ static inline bool arm_smmu_master_canwbs(struct arm_smmu_master *master)
IOMMU_FWSPEC_PCI_RC_CANWBS;
}

+struct arm_smmu_attach_state {
+ /* Inputs */
+ struct iommu_domain *old_domain;
+ struct arm_smmu_master *master;
+ bool cd_needs_ats;
+ ioasid_t ssid;
+ /* Resulting state */
+ bool ats_enabled;
+};
+
+int arm_smmu_attach_prepare(struct arm_smmu_attach_state *state,
+ struct iommu_domain *new_domain);
+void arm_smmu_attach_commit(struct arm_smmu_attach_state *state);
+void arm_smmu_install_ste_for_dev(struct arm_smmu_master *master,
+ const struct arm_smmu_ste *target);
+
#ifdef CONFIG_ARM_SMMU_V3_SVA
bool arm_smmu_sva_supported(struct arm_smmu_device *smmu);
bool arm_smmu_master_sva_supported(struct arm_smmu_master *master);
--
2.43.0