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Commit c49b7296 authored by Deepak Kumar's avatar Deepak Kumar Committed by Gerrit - the friendly Code Review server
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msm: kgsl: Add pagetable base mismatch info in pagefault handler 



Dump pagetable base mismatch debug info in pagefault handler if
there is a mismatch between software and hardware pagetable base.
This will help in quickly identifying that pagefault is because of
the incorrectly programmed pagetable base.

Change-Id: I7250aed4869b02e4ef5cfe937e5e0c45d81969ba
Signed-off-by: default avatarDeepak Kumar <dkumar@codeaurora.org>
parent 0ced5701

drivers/gpu/msm/kgsl_iommu.c

+12 −1
Original line number Diff line number Diff line
@@ -736,7 +736,7 @@ static int kgsl_iommu_fault_handler(struct iommu_domain *domain, 
	struct kgsl_mmu *mmu = pt->mmu;

	struct kgsl_iommu *iommu;

	struct kgsl_iommu_context *ctx;

	u64 ptbase;

	u64 ptbase, proc_ptbase;

	u32 contextidr;

	pid_t pid = 0;

	pid_t ptname;
@@ -848,6 +848,17 @@ static int kgsl_iommu_fault_handler(struct iommu_domain *domain, 
			"GPU PAGE FAULT: addr = %lX pid= %d name=%s\n", addr,

			ptname,

			context != NULL ? context->proc_priv->comm : "unknown");



		if (context != NULL) {

			proc_ptbase = kgsl_mmu_pagetable_get_ttbr0(

					context->proc_priv->pagetable);



			if (ptbase != proc_ptbase)

				dev_crit(ctx->kgsldev->dev,

				"Pagetable address mismatch: HW address is 0x%llx but SW expected 0x%llx\n",

				ptbase, proc_ptbase);

		}



		dev_crit(ctx->kgsldev->dev,

			"context=%s ctx_type=%s TTBR0=0x%llx CIDR=0x%x (%s %s fault)\n",

			ctx->name, api_str, ptbase, contextidr,