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msm: kgsl: skip if requested address doesn't fall in the svm range

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User should not be provided address out of SVM region.
Return error for any such requests from user.

Change-Id: If149044039b156f8192f405714f5c1a0571004e7
Signed-off-by: gkiranku <gkiranku@codeaurora.org>
This commit is contained in:
gkiranku 2020-07-29 18:28:57 +05:30
commit 66222aaf87
1 changed files with 18 additions and 3 deletions
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21
drivers/gpu/msm/kgsl_iommu.c
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@ -2278,6 +2278,22 @@ static uint64_t kgsl_iommu_find_svm_region(struct kgsl_pagetable *pagetable,
return addr;
}
static bool iommu_addr_in_svm_ranges(struct kgsl_iommu_pt *pt,
u64 gpuaddr, u64 size)
{
if ((gpuaddr >= pt->compat_va_start && gpuaddr < pt->compat_va_end) &&
((gpuaddr + size) > pt->compat_va_start &&
(gpuaddr + size) <= pt->compat_va_end))
return true;
if ((gpuaddr >= pt->svm_start && gpuaddr < pt->svm_end) &&
((gpuaddr + size) > pt->svm_start &&
(gpuaddr + size) <= pt->svm_end))
return true;
return false;
}
static int kgsl_iommu_set_svm_region(struct kgsl_pagetable *pagetable,
uint64_t gpuaddr, uint64_t size)
{
@ -2285,9 +2301,8 @@ static int kgsl_iommu_set_svm_region(struct kgsl_pagetable *pagetable,
struct kgsl_iommu_pt *pt = pagetable->priv;
struct rb_node *node;
/* Make sure the requested address doesn't fall in the global range */
if (ADDR_IN_GLOBAL(pagetable->mmu, gpuaddr) ||
ADDR_IN_GLOBAL(pagetable->mmu, gpuaddr + size))
/* Make sure the requested address doesn't fall out of SVM range */
if (!iommu_addr_in_svm_ranges(pt, gpuaddr, size))
return -ENOMEM;
spin_lock(&pagetable->lock);