[PATCH v8 09/17] arm64/xen: get_dma_ops: return xen_dma_ops if we are running as xen_initial_domain
STALE4737d
REVIEWED: 3 (3M)
From: Stefano Stabellini <hidden>
Date: 2013-10-09 20:49:31
Also in:
lkml, xen-devel
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Revision v7 of 7 in this series; 1 review trailer (1 from subsystem maintainers).
Revisions (7)
We can't simply override arm_dma_ops with xen_dma_ops because devices are allowed to have their own dma_ops and they take precedence over arm_dma_ops. When running on Xen as initial domain, we always want xen_dma_ops to be the one in use. Signed-off-by: Stefano Stabellini <redacted> Acked-by: Catalin Marinas <catalin.marinas@arm.com> CC: will.deacon at arm.com Changes in v7: - return xen_dma_ops only if we are the initial domain; - rename __get_dma_ops to __generic_dma_ops. --- arch/arm64/include/asm/dma-mapping.h | 13 ++++++++++++- 1 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index c2cb8a0..6763c29 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h@@ -23,12 +23,15 @@ #include <asm-generic/dma-coherent.h> +#include <xen/xen.h> +#include <asm/xen/hypervisor.h> + #define ARCH_HAS_DMA_GET_REQUIRED_MASK #define DMA_ERROR_CODE (~0) extern struct dma_map_ops *dma_ops; -static inline struct dma_map_ops *get_dma_ops(struct device *dev) +static inline struct dma_map_ops *__generic_dma_ops(struct device *dev) { if (unlikely(!dev) || !dev->archdata.dma_ops) return dma_ops;
@@ -36,6 +39,14 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev) return dev->archdata.dma_ops; } +static inline struct dma_map_ops *get_dma_ops(struct device *dev) +{ + if (xen_initial_domain()) + return xen_dma_ops; + else + return __generic_dma_ops(dev); +} + #include <asm-generic/dma-mapping-common.h> static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
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1.7.2.5