diff mbox series

[v2,1/2] iommu/arm-smmu-v3: make sure the stale caching of L1STD are invalid

Message ID 20190318131243.20716-2-thunder.leizhen@huawei.com
State New
Headers show
Series iommu/arm-smmu-v3: make sure the kdump kernel can work well when smmu is enabled | expand

Commit Message

Leizhen (ThunderTown) March 18, 2019, 1:12 p.m. UTC 
After the content of L1STD(Level 1 Stream Table Descriptor) in DDR has been
modified, should make sure the cached copies be invalidated.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>

---
 drivers/iommu/arm-smmu-v3.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

-- 
1.8.3
diff mbox series

Patch

diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index d3880010c6cfc8c..9b6afa8e69f70f6 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -1071,13 +1071,14 @@  static void arm_smmu_write_ctx_desc(struct arm_smmu_device *smmu,
 	*dst = cpu_to_le64(val);
 }
 
-static void arm_smmu_sync_ste_for_sid(struct arm_smmu_device *smmu, u32 sid)
+static void __arm_smmu_sync_ste_for_sid(struct arm_smmu_device *smmu,
+					 u32 sid, bool leaf)
 {
 	struct arm_smmu_cmdq_ent cmd = {
 		.opcode	= CMDQ_OP_CFGI_STE,
 		.cfgi	= {
 			.sid	= sid,
-			.leaf	= true,
+			.leaf	= leaf,
 		},
 	};
 
@@ -1085,6 +1086,16 @@  static void arm_smmu_sync_ste_for_sid(struct arm_smmu_device *smmu, u32 sid)
 	arm_smmu_cmdq_issue_sync(smmu);
 }
 
+static void arm_smmu_sync_ste_for_sid(struct arm_smmu_device *smmu, u32 sid)
+{
+	__arm_smmu_sync_ste_for_sid(smmu, sid, true);
+}
+
+static void arm_smmu_sync_std_for_sid(struct arm_smmu_device *smmu, u32 sid)
+{
+	__arm_smmu_sync_ste_for_sid(smmu, sid, false);
+}
+
 static void arm_smmu_write_strtab_ent(struct arm_smmu_device *smmu, u32 sid,
 				      __le64 *dst, struct arm_smmu_strtab_ent *ste)
 {
@@ -1232,6 +1243,7 @@  static int arm_smmu_init_l2_strtab(struct arm_smmu_device *smmu, u32 sid)
 
 	arm_smmu_init_bypass_stes(desc->l2ptr, 1 << STRTAB_SPLIT);
 	arm_smmu_write_strtab_l1_desc(strtab, desc);
+	arm_smmu_sync_std_for_sid(smmu, sid);
 	return 0;
 }