search for: pfn_to_bfn

...a_addr; -/* - * Both of these functions should avoid PFN_PHYS because phys_addr_t - * can be 32bit when dma_addr_t is 64bit leading to a loss in - * information if the shift is done before casting to 64bit. - */ -static inline dma_addr_t xen_phys_to_bus(phys_addr_t paddr) -{ - unsigned long bfn = pfn_to_bfn(PFN_DOWN(paddr)); - dma_addr_t dma = (dma_addr_t)bfn << PAGE_SHIFT; - - dma |= paddr & ~PAGE_MASK; - - return dma; -} - -static inline phys_addr_t xen_bus_to_phys(dma_addr_t baddr) -{ - unsigned long pfn = bfn_to_pfn(PFN_DOWN(baddr)); - dma_addr_t dma = (dma_addr_t)pfn << PAGE_SHIFT...

Hi all, this patch series introduces support for running Linux on top of Xen inside a virtual machine with virtio devices (nested virt scenario). The problem is that Linux virtio drivers use virt_to_phys to get the guest pseudo-physical addresses to pass to the backend, which doesn't work as expected on Xen. Switching the virtio drivers to the dma APIs (dma_alloc_coherent,

Hi all, this patch series introduces support for running Linux on top of Xen inside a virtual machine with virtio devices (nested virt scenario). The problem is that Linux virtio drivers use virt_to_phys to get the guest pseudo-physical addresses to pass to the backend, which doesn't work as expected on Xen. Switching the virtio drivers to the dma APIs (dma_alloc_coherent,