diff options
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/include/asm/xen/hypervisor.h | 2 | ||||
| -rw-r--r-- | arch/arm/include/asm/xen/page.h | 1 | ||||
| -rw-r--r-- | arch/arm/xen/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/xen/mm.c | 64 | ||||
| -rw-r--r-- | arch/arm64/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm64/xen/Makefile | 2 | ||||
| -rw-r--r-- | drivers/xen/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/xen/swiotlb-xen.c | 15 |
9 files changed, 86 insertions, 3 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index b08374f..01f7013 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1888,6 +1888,7 @@ config XEN depends on CPU_V7 && !CPU_V6 depends on !GENERIC_ATOMIC64 select ARM_PSCI + select SWIOTLB_XEN help Say Y if you want to run Linux in a Virtual Machine on Xen on ARM. diff --git a/arch/arm/include/asm/xen/hypervisor.h b/arch/arm/include/asm/xen/hypervisor.h index d7ab99a..1317ee4 100644 --- a/arch/arm/include/asm/xen/hypervisor.h +++ b/arch/arm/include/asm/xen/hypervisor.h @@ -16,4 +16,6 @@ static inline enum paravirt_lazy_mode paravirt_get_lazy_mode(void) return PARAVIRT_LAZY_NONE; } +extern struct dma_map_ops *xen_dma_ops; + #endif /* _ASM_ARM_XEN_HYPERVISOR_H */ diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h index d1b5dd5..5d0e4c5 100644 --- a/arch/arm/include/asm/xen/page.h +++ b/arch/arm/include/asm/xen/page.h @@ -6,6 +6,7 @@ #include <linux/pfn.h> #include <linux/types.h> +#include <linux/dma-mapping.h> #include <xen/xen.h> #include <xen/interface/grant_table.h> diff --git a/arch/arm/xen/Makefile b/arch/arm/xen/Makefile index 21e6ff5..1296952 100644 --- a/arch/arm/xen/Makefile +++ b/arch/arm/xen/Makefile @@ -1 +1 @@ -obj-y := enlighten.o hypercall.o grant-table.o p2m.o +obj-y := enlighten.o hypercall.o grant-table.o p2m.o mm.o diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c new file mode 100644 index 0000000..d56b8c6 --- /dev/null +++ b/arch/arm/xen/mm.c @@ -0,0 +1,64 @@ +#include <linux/bootmem.h> +#include <linux/gfp.h> +#include <linux/export.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/dma-mapping.h> +#include <linux/vmalloc.h> +#include <linux/swiotlb.h> + +#include <xen/xen.h> +#include <xen/interface/memory.h> +#include <xen/swiotlb-xen.h> + +#include <asm/cacheflush.h> +#include <asm/xen/page.h> +#include <asm/xen/hypercall.h> +#include <asm/xen/interface.h> + +int xen_create_contiguous_region(unsigned long vstart, unsigned int order, + unsigned int address_bits, + dma_addr_t *dma_handle) +{ + if (!xen_initial_domain()) + return -EINVAL; + + /* we assume that dom0 is mapped 1:1 for now */ + *dma_handle = virt_to_phys(pstart); + return 0; +} +EXPORT_SYMBOL_GPL(xen_create_contiguous_region); + +void xen_destroy_contiguous_region(unsigned long vstart, unsigned int order) +{ + return; +} +EXPORT_SYMBOL_GPL(xen_destroy_contiguous_region); + +struct dma_map_ops *xen_dma_ops; +EXPORT_SYMBOL_GPL(xen_dma_ops); + +static struct dma_map_ops xen_swiotlb_dma_ops = { + .mapping_error = xen_swiotlb_dma_mapping_error, + .alloc = xen_swiotlb_alloc_coherent, + .free = xen_swiotlb_free_coherent, + .sync_single_for_cpu = xen_swiotlb_sync_single_for_cpu, + .sync_single_for_device = xen_swiotlb_sync_single_for_device, + .sync_sg_for_cpu = xen_swiotlb_sync_sg_for_cpu, + .sync_sg_for_device = xen_swiotlb_sync_sg_for_device, + .map_sg = xen_swiotlb_map_sg_attrs, + .unmap_sg = xen_swiotlb_unmap_sg_attrs, + .map_page = xen_swiotlb_map_page, + .unmap_page = xen_swiotlb_unmap_page, + .dma_supported = xen_swiotlb_dma_supported, +}; + +int __init xen_mm_init(void) +{ + if (!xen_initial_domain()) + return 0; + xen_swiotlb_init(1, false); + xen_dma_ops = &xen_swiotlb_dma_ops; + return 0; +} +arch_initcall(xen_mm_init); diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index c044548..04ffafb 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -211,6 +211,7 @@ config XEN_DOM0 config XEN bool "Xen guest support on ARM64 (EXPERIMENTAL)" depends on ARM64 && OF + select SWIOTLB_XEN help Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. diff --git a/arch/arm64/xen/Makefile b/arch/arm64/xen/Makefile index cd866b0..74a8d87 100644 --- a/arch/arm64/xen/Makefile +++ b/arch/arm64/xen/Makefile @@ -1,2 +1,2 @@ -xen-arm-y += $(addprefix ../../arm/xen/, enlighten.o grant-table.o p2m.o) +xen-arm-y += $(addprefix ../../arm/xen/, enlighten.o grant-table.o p2m.o mm.o) obj-y := xen-arm.o hypercall.o diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig index 23eae5c..c794ea1 100644 --- a/drivers/xen/Kconfig +++ b/drivers/xen/Kconfig @@ -140,7 +140,6 @@ config XEN_GRANT_DEV_ALLOC config SWIOTLB_XEN def_bool y - depends on PCI && X86 select SWIOTLB config XEN_TMEM diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index b72f31c..f0fc1a4 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -42,12 +42,27 @@ #include <xen/page.h> #include <xen/xen-ops.h> #include <xen/hvc-console.h> +#include <asm/dma-mapping.h> /* * Used to do a quick range check in swiotlb_tbl_unmap_single and * swiotlb_tbl_sync_single_*, to see if the memory was in fact allocated by this * API. */ +#ifndef CONFIG_X86 +static unsigned long dma_alloc_coherent_mask(struct device *dev, + gfp_t gfp) +{ + unsigned long dma_mask = 0; + + dma_mask = dev->coherent_dma_mask; + if (!dma_mask) + dma_mask = (gfp & GFP_DMA) ? DMA_BIT_MASK(24) : DMA_BIT_MASK(32); + + return dma_mask; +} +#endif + static char *xen_io_tlb_start, *xen_io_tlb_end; static unsigned long xen_io_tlb_nslabs; /* |
