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Commit 70409712 authored by Neeti Desai's avatar Neeti Desai
Browse files

iommu: msm: Do not invalidate the TLB during iommu map 



Due to a hardware bug the TLB has to be invalidated
during map and map_range operations. Newer targets
no longer see this issue. Add config option
to invalidate the TLB only for older targets.

Change-Id: I5bbe84e9dde23bcf960cf5409eed41c6cea41c16
Signed-off-by: default avatarNeeti Desai <neetid@codeaurora.org>
parent 66d69d78

drivers/iommu/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -137,6 +137,17 @@ config IOMMU_FORCE_4K_MAPPINGS 


         If unsure, say N here.



config MSM_IOMMU_TLBINVAL_ON_MAP

	bool "Invalidates the SMMU TLB on map"

	depends on MSM_IOMMU

	help

	 Say Y here if you want to invalidate the SMMU TLB during map

	 operations. This feature needs to be enabled only on older

	 targets which have a hardware bug and need the TLB to be

	 invalidated on all map and map range calls.



	 If unsure, say Y here.



# AMD IOMMU support

config AMD_IOMMU

	bool "AMD IOMMU support"

drivers/iommu/msm_iommu-v1.c

+6 −0
Original line number Diff line number Diff line
@@ -971,7 +971,10 @@ static int msm_iommu_map(struct iommu_domain *domain, unsigned long va, 
	if (ret)

		goto fail;



#ifdef CONFIG_MSM_IOMMU_TLBINVAL_ON_MAP

	ret = __flush_iotlb_va(domain, va);

#endif



fail:

	mutex_unlock(&msm_iommu_lock);

	return ret;
@@ -1023,7 +1026,10 @@ static int msm_iommu_map_range(struct iommu_domain *domain, unsigned int va, 
	if (ret)

		goto fail;



#ifdef CONFIG_MSM_IOMMU_TLBINVAL_ON_MAP

	__flush_iotlb(domain);

#endif



fail:

	mutex_unlock(&msm_iommu_lock);

	return ret;

drivers/iommu/msm_iommu_sec.c

+8 −0
Original line number Diff line number Diff line
@@ -467,7 +467,11 @@ static int msm_iommu_sec_ptbl_map(struct msm_iommu_drvdata *iommu_drvdata, 
	map.info.ctx_id = ctx_drvdata->num;

	map.info.va = va;

	map.info.size = len;

#ifdef CONFIG_MSM_IOMMU_TLBINVAL_ON_MAP

	map.flags = IOMMU_TLBINVAL_FLAG;

#else

	map.flags = 0;

#endif

	flush_va = &pa;

	flush_pa = virt_to_phys(&pa);
@@ -517,7 +521,11 @@ static int msm_iommu_sec_ptbl_map_range(struct msm_iommu_drvdata *iommu_drvdata, 
	map.info.ctx_id = ctx_drvdata->num;

	map.info.va = va;

	map.info.size = len;

#ifdef CONFIG_MSM_IOMMU_TLBINVAL_ON_MAP

	map.flags = IOMMU_TLBINVAL_FLAG;

#else

	map.flags = 0;

#endif



	if (sg->length == len) {

		pa = get_phys_addr(sg);