[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Question about HVM network
On Sun, 2011-11-06 at 14:12 +0000, cc Luit wrote: > Hi, all, > > > I've a question about how network of HVM works, > when hvm startup, I found the qemu register the io port 0xc100-0xc1ff > to the function rtl8139_ioport_write, is this means qemu emulate the > rtl8139 NIC to handle network io event? I think this is the default. You can select a different emulated NIC using e.g. "model=e1000" in your VIF stanza in the guest configuration file. > but when I scp a file to the remote machine, I cannot find any write > to these ports, so I'm curious how hvm's network works? Perhaps you have ended up with PVHVM network driver? This will take precedence to the emulated NIC if present. Ian. > > > first I'm not using the passthrough, so I think that it will use DMA: > after it write the content to the memory, it will use PIO to write to > one of the port to tell the qemu it need to start DMA, but there is no > write to the port, then how does the rtc8139 emulated by qemu know > when to start the DMA and where is the memory address? > > > hope someone can help me~ thanks in advance. > > > -- > - Luit @ Parallel Processing Institute, Fudan University > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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