iommu: msm: Add decoding to PAR when fault occurs
Add decoding of the PAR register when a VA2PA translation fault
occurs to help in debugging.
Change-Id: Ie3c442d29c3c10f7437acbb63262eb51bc9cc9ab
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
diff --git a/drivers/iommu/msm_iommu-v1.c b/drivers/iommu/msm_iommu-v1.c
index a400b58..aed2b47 100644
--- a/drivers/iommu/msm_iommu-v1.c
+++ b/drivers/iommu/msm_iommu-v1.c
@@ -769,7 +769,7 @@
struct msm_iommu_priv *priv;
struct msm_iommu_drvdata *iommu_drvdata;
struct msm_iommu_ctx_drvdata *ctx_drvdata;
- unsigned int par;
+ u64 par;
void __iomem *base;
phys_addr_t ret = 0;
int ctx;
@@ -802,6 +802,23 @@
__disable_clocks(iommu_drvdata);
if (par & CB_PAR_F) {
+ unsigned int level = (par & CB_PAR_PLVL) >> CB_PAR_PLVL_SHIFT;
+ pr_err("IOMMU translation fault!\n");
+ pr_err("name = %s\n", iommu_drvdata->name);
+ pr_err("context = %s (%d)\n", ctx_drvdata->name,
+ ctx_drvdata->num);
+ pr_err("Interesting registers:\n");
+ pr_err("PAR = %16llx [%s%s%s%s%s%s%s%sPLVL%u %s]\n", par,
+ (par & CB_PAR_F) ? "F " : "",
+ (par & CB_PAR_TF) ? "TF " : "",
+ (par & CB_PAR_AFF) ? "AFF " : "",
+ (par & CB_PAR_PF) ? "PF " : "",
+ (par & CB_PAR_EF) ? "EF " : "",
+ (par & CB_PAR_TLBMCF) ? "TLBMCF " : "",
+ (par & CB_PAR_TLBLKF) ? "TLBLKF " : "",
+ (par & CB_PAR_ATOT) ? "ATOT " : "",
+ level,
+ (par & CB_PAR_STAGE) ? "S2 " : "S1 ");
ret = 0;
} else {
/* We are dealing with a supersection */