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iommu/exynos: Improve page fault debug message 

Add master device name to default IOMMU fault message to make easier to
find which device triggered the fault. While at it, move printing some
information (like page table base and first level entry addresses) to
dev_dbg(), because those are typically not very useful for typical device
driver user/developer not equipped with hardware debugging tools.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Marek Szyprowski 2017-01-09 13:03:53 +01:00 committed by Joerg Roedel
parent 2f5f44f205
commit ec5d241b5f
1 changed files with 5 additions and 4 deletions
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9
drivers/iommu/exynos-iommu.c
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@ -381,13 +381,14 @@ static void show_fault_information(struct sysmmu_drvdata *data,
{
sysmmu_pte_t *ent;
dev_err(data->sysmmu, "%s FAULT occurred at %#x (page table base: %pa)\n",
finfo->name, fault_addr, &data->pgtable);
dev_err(data->sysmmu, "%s: %s FAULT occurred at %#x\n",
dev_name(data->master), finfo->name, fault_addr);
dev_dbg(data->sysmmu, "Page table base: %pa\n", &data->pgtable);
ent = section_entry(phys_to_virt(data->pgtable), fault_addr);
dev_err(data->sysmmu, "\tLv1 entry: %#x\n", *ent);
dev_dbg(data->sysmmu, "\tLv1 entry: %#x\n", *ent);
if (lv1ent_page(ent)) {
ent = page_entry(ent, fault_addr);
dev_err(data->sysmmu, "\t Lv2 entry: %#x\n", *ent);
dev_dbg(data->sysmmu, "\t Lv2 entry: %#x\n", *ent);
}
}