On 12/09/2016 19:14, Benjamin Serebrin wrote: > > One could tie hot plug of a bounce-buffer-requiring virtual device to > causing SWIOTLB allocation, and fail the device initialization if the > required buffer couldn't be allocated. I don't know of any new > virtual devices that require that, though, as high-mem-incapability is > hopefully only a vestige of very old virtual or real devices. There are some devices (most importantly virtio 0.9) that use 32-bit PFNs. They would require bounce buffers if the physical addresses are at or above 2^44. Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
