diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/xen/swiotlb-xen.h | 2 | ||||
| -rw-r--r-- | arch/x86/xen/pci-swiotlb-xen.c | 24 |
2 files changed, 24 insertions, 2 deletions
diff --git a/arch/x86/include/asm/xen/swiotlb-xen.h b/arch/x86/include/asm/xen/swiotlb-xen.h index 1be1ab7d6a41..ee52fcac6f72 100644 --- a/arch/x86/include/asm/xen/swiotlb-xen.h +++ b/arch/x86/include/asm/xen/swiotlb-xen.h @@ -5,10 +5,12 @@ extern int xen_swiotlb; extern int __init pci_xen_swiotlb_detect(void); extern void __init pci_xen_swiotlb_init(void); +extern int pci_xen_swiotlb_init_late(void); #else #define xen_swiotlb (0) static inline int __init pci_xen_swiotlb_detect(void) { return 0; } static inline void __init pci_xen_swiotlb_init(void) { } +static inline int pci_xen_swiotlb_init_late(void) { return -ENXIO; } #endif #endif /* _ASM_X86_SWIOTLB_XEN_H */ diff --git a/arch/x86/xen/pci-swiotlb-xen.c b/arch/x86/xen/pci-swiotlb-xen.c index 1c1722761eec..b152640d8388 100644 --- a/arch/x86/xen/pci-swiotlb-xen.c +++ b/arch/x86/xen/pci-swiotlb-xen.c @@ -12,7 +12,7 @@ #include <asm/iommu.h> #include <asm/dma.h> #endif - +#include <linux/export.h> int xen_swiotlb __read_mostly; static struct dma_map_ops xen_swiotlb_dma_ops = { @@ -69,13 +69,33 @@ int __init pci_xen_swiotlb_detect(void) void __init pci_xen_swiotlb_init(void) { if (xen_swiotlb) { - xen_swiotlb_init(1); + xen_swiotlb_init(1, true /* early */); dma_ops = &xen_swiotlb_dma_ops; /* Make sure ACS will be enabled */ pci_request_acs(); } } + +int pci_xen_swiotlb_init_late(void) +{ + int rc; + + if (xen_swiotlb) + return 0; + + rc = xen_swiotlb_init(1, false /* late */); + if (rc) + return rc; + + dma_ops = &xen_swiotlb_dma_ops; + /* Make sure ACS will be enabled */ + pci_request_acs(); + + return 0; +} +EXPORT_SYMBOL_GPL(pci_xen_swiotlb_init_late); + IOMMU_INIT_FINISH(pci_xen_swiotlb_detect, 0, pci_xen_swiotlb_init, |