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Commit 71b55663 authored by Russell King's avatar Russell King
Browse files

ARM: fix executability of CMA mappings 



The CMA region was being marked executable:

0xdc04e000-0xdc050000           8K     RW x      MEM/CACHED/WBRA
0xdc060000-0xdc100000         640K     RW x      MEM/CACHED/WBRA
0xdc4f5000-0xdc500000          44K     RW x      MEM/CACHED/WBRA
0xdcce9000-0xe0000000       52316K     RW x      MEM/CACHED/WBRA

This is mainly due to the badly worded MT_MEMORY_DMA_READY symbol, but
there are also a few other places in dma-mapping which should be
corrected to use the right constant.  Fix all these places:

0xdc04e000-0xdc050000           8K     RW NX     MEM/CACHED/WBRA
0xdc060000-0xdc100000         640K     RW NX     MEM/CACHED/WBRA
0xdc280000-0xdc300000         512K     RW NX     MEM/CACHED/WBRA
0xdc6fc000-0xe0000000       58384K     RW NX     MEM/CACHED/WBRA

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent dca9aa92

arch/arm/mm/dma-mapping.c

+3 −3
Original line number Diff line number Diff line
@@ -361,7 +361,7 @@ void __init init_dma_coherent_pool_size(unsigned long size) 
static int __init atomic_pool_init(void)

{

	struct dma_pool *pool = &atomic_pool;

	pgprot_t prot = pgprot_dmacoherent(pgprot_kernel);

	pgprot_t prot = pgprot_dmacoherent(PAGE_KERNEL);

	gfp_t gfp = GFP_KERNEL | GFP_DMA;

	unsigned long nr_pages = pool->size >> PAGE_SHIFT;

	unsigned long *bitmap;
@@ -609,7 +609,7 @@ static void __free_from_contiguous(struct device *dev, struct page *page, 
	if (PageHighMem(page))

		__dma_free_remap(cpu_addr, size);

	else

		__dma_remap(page, size, pgprot_kernel);

		__dma_remap(page, size, PAGE_KERNEL);

	dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT);

}
@@ -1357,7 +1357,7 @@ static void __iommu_free_atomic(struct device *dev, void *cpu_addr, 
static void *arm_iommu_alloc_attrs(struct device *dev, size_t size,

	    dma_addr_t *handle, gfp_t gfp, struct dma_attrs *attrs)

{

	pgprot_t prot = __get_dma_pgprot(attrs, pgprot_kernel);

	pgprot_t prot = __get_dma_pgprot(attrs, PAGE_KERNEL);

	struct page **pages;

	void *addr = NULL;

arch/arm/mm/mmu.c

+2 −1
Original line number Diff line number Diff line
@@ -333,7 +333,8 @@ static struct mem_type mem_types[] = { 
		.domain    = DOMAIN_KERNEL,

	},

	[MT_MEMORY_DMA_READY] = {

		.prot_pte  = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY,

		.prot_pte  = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |

				L_PTE_XN,

		.prot_l1   = PMD_TYPE_TABLE,

		.domain    = DOMAIN_KERNEL,

	},