|
Ivan T. Ivanov |
4d8706 |
From: Christoph Hellwig <hch@lst.de>
|
|
Ivan T. Ivanov |
4d8706 |
Date: Tue, 30 Apr 2019 06:51:50 -0400
|
|
Ivan T. Ivanov |
4d8706 |
Subject: arm64/iommu: handle non-remapped addresses in ->mmap and
|
|
Ivan T. Ivanov |
4d8706 |
->get_sgtable
|
|
Ivan T. Ivanov |
4d8706 |
Git-commit: a98d9ae937d256ed679a935fc82d9deaa710d98e
|
|
Ivan T. Ivanov |
4d8706 |
Patch-mainline: v5.2-rc2
|
|
Ivan T. Ivanov |
4d8706 |
References: git-fixes
|
|
Ivan T. Ivanov |
4d8706 |
|
|
Ivan T. Ivanov |
4d8706 |
DMA allocations that can't sleep may return non-remapped addresses, but
|
|
Ivan T. Ivanov |
4d8706 |
we do not properly handle them in the mmap and get_sgtable methods.
|
|
Ivan T. Ivanov |
4d8706 |
Resolve non-vmalloc addresses using virt_to_page to handle this corner
|
|
Ivan T. Ivanov |
4d8706 |
case.
|
|
Ivan T. Ivanov |
4d8706 |
|
|
Ivan T. Ivanov |
4d8706 |
Cc: <stable@vger.kernel.org>
|
|
Ivan T. Ivanov |
4d8706 |
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
|
|
Ivan T. Ivanov |
4d8706 |
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
|
|
Ivan T. Ivanov |
4d8706 |
Signed-off-by: Christoph Hellwig <hch@lst.de>
|
|
Ivan T. Ivanov |
4d8706 |
Signed-off-by: Will Deacon <will.deacon@arm.com>
|
|
Ivan T. Ivanov |
4d8706 |
Acked-by: Ivan T. Ivanov <iivanov@suse.de>
|
|
Ivan T. Ivanov |
4d8706 |
---
|
|
Ivan T. Ivanov |
4d8706 |
arch/arm64/mm/dma-mapping.c | 10 ++++++++++
|
|
Ivan T. Ivanov |
4d8706 |
1 file changed, 10 insertions(+)
|
|
Ivan T. Ivanov |
4d8706 |
|
|
Ivan T. Ivanov |
4d8706 |
--- a/arch/arm64/mm/dma-mapping.c
|
|
Ivan T. Ivanov |
4d8706 |
+++ b/arch/arm64/mm/dma-mapping.c
|
|
Ivan T. Ivanov |
4d8706 |
@@ -720,6 +720,11 @@ static int __iommu_mmap_attrs(struct dev
|
|
Ivan T. Ivanov |
4d8706 |
if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &ret))
|
|
Ivan T. Ivanov |
4d8706 |
return ret;
|
|
Ivan T. Ivanov |
4d8706 |
|
|
Ivan T. Ivanov |
4d8706 |
+ if (!is_vmalloc_addr(cpu_addr)) {
|
|
Ivan T. Ivanov |
4d8706 |
+ unsigned long pfn = page_to_pfn(virt_to_page(cpu_addr));
|
|
Ivan T. Ivanov |
4d8706 |
+ return __swiotlb_mmap_pfn(vma, pfn, size);
|
|
Ivan T. Ivanov |
4d8706 |
+ }
|
|
Ivan T. Ivanov |
4d8706 |
+
|
|
Ivan T. Ivanov |
4d8706 |
if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
|
|
Ivan T. Ivanov |
4d8706 |
/*
|
|
Ivan T. Ivanov |
4d8706 |
* DMA_ATTR_FORCE_CONTIGUOUS allocations are always remapped,
|
|
Ivan T. Ivanov |
4d8706 |
@@ -743,6 +748,11 @@ static int __iommu_get_sgtable(struct de
|
|
Ivan T. Ivanov |
4d8706 |
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
|
|
Ivan T. Ivanov |
4d8706 |
struct vm_struct *area = find_vm_area(cpu_addr);
|
|
Ivan T. Ivanov |
4d8706 |
|
|
Ivan T. Ivanov |
4d8706 |
+ if (!is_vmalloc_addr(cpu_addr)) {
|
|
Ivan T. Ivanov |
4d8706 |
+ struct page *page = virt_to_page(cpu_addr);
|
|
Ivan T. Ivanov |
4d8706 |
+ return __swiotlb_get_sgtable_page(sgt, page, size);
|
|
Ivan T. Ivanov |
4d8706 |
+ }
|
|
Ivan T. Ivanov |
4d8706 |
+
|
|
Ivan T. Ivanov |
4d8706 |
if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
|
|
Ivan T. Ivanov |
4d8706 |
/*
|
|
Ivan T. Ivanov |
4d8706 |
* DMA_ATTR_FORCE_CONTIGUOUS allocations are always remapped,
|