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Re: [Qemu-devel] [PATCH 01/10] Add stub functions for PCI device models

From: Avi Kivity
Subject: Re: [Qemu-devel] [PATCH 01/10] Add stub functions for PCI device models to do PCI DMA
Date: Fri, 02 Sep 2011 11:37:25 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:6.0) Gecko/20110816 Thunderbird/6.0

On 09/01/2011 07:05 PM, Anthony Liguori wrote:

The challenge is what you do about something like ne2k where the core chipset can either be a PCI device or an ISA device. You would have to implement a wrapper around pci_dma_rw() in order to turn it into cpu_physical_memory_rw when doing ISA.

btw, ISA DMA is very different, no? You program a dma controller to copy memory from the device to RAM (or vice versa); the device never initiates a transaction IIRC.

I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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