I've been going through some of the networking modules on my Qubes system. Some of them would indicate that DMA can be switched off entirely, and PIO used instead.
For example: b43.ko modinfo -F parm /lib/modules/4.4.14-11.pvops.qubes.x86_64/kernel/drivers/net/wireless/b43/b43.ko pio:Use PIO accesses by default: 0=DMA, 1=PIO (int) --- so.. PIO here would suggest that it's possible to use non-DMA. --- I guess my real question is... would switching off DMA make you safer anyway..? For example, PIO is just going to transfer it to the CPU. At this point, couldn't the CPU just infect your device rather than DMA..? So I'm not even entirely convinced that uaing PIO would make you safer anyway. What do people think..? -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/4d79b94e-2180-4ff5-95e7-6f01ecec14ab%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
