From: Akio Takebe <takebe_akio@jp.fujitsu.com>
To: Jean Guyader <jean.guyader@gmail.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: [Q] Is qemu used when we use VTd?
Date: Thu, 11 Sep 2008 20:48:02 +0900 [thread overview]
Message-ID: <48C90572.6020206@jp.fujitsu.com> (raw)
In-Reply-To: <f68b66460809110412q5b79e830h3b0658e37b0492e1@mail.gmail.com>
Jean Guyader wrote:
> On Thu, Sep 11, 2008 at 11:46 AM, Akio Takebe
> <takebe_akio@jp.fujitsu.com> wrote:
>> Hi,
>>
>> If we assign a device to HVM guest,
>> HVM guest can do directry DMA transfer.
>> But how about accessing pci configuration register
>> of the pass through device? Do we still access
>> pci configuration register through qemu?
>>
>
> Yes, you should have a look at the function pt_pci_read_config in
> ioemu/hw/pass-through.c.
>
Thanks.
HVM guest use PCI BIOS of rombios at access pci configuration register,
and the accesses are trapped by qemu. qemu do their access instead, right?
Can we directly use MMCONFIG for PCI-Express card pass-throughed by VT-d on HVM?
Best Regards,
Akio Takebe
next prev parent reply other threads:[~2008-09-11 11:48 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-11 10:46 [Q] Is qemu used when we use VTd? Akio Takebe
2008-09-11 11:00 ` pradeep singh rautela
2008-09-11 11:01 ` Tian, Kevin
2008-09-11 11:06 ` Akio Takebe
2008-09-12 2:37 ` Tian, Kevin
2008-09-12 2:59 ` Akio Takebe
2008-09-12 3:08 ` Tian, Kevin
2008-09-12 3:43 ` Akio Takebe
2008-09-11 11:12 ` Jean Guyader
2008-09-11 11:48 ` Akio Takebe [this message]
2008-09-12 2:46 ` Tian, Kevin
2008-09-12 3:25 ` Akio Takebe
2008-09-12 4:28 ` Yuji Shimada
2008-09-12 5:27 ` Akio Takebe
2008-09-22 13:47 ` Jiang, Yunhong
2008-09-24 8:24 ` Yuji Shimada
2008-09-24 8:57 ` Jiang, Yunhong
2008-09-26 4:09 ` Yuji Shimada
2008-09-26 4:36 ` Jiang, Yunhong
2008-09-29 5:05 ` Yuji Shimada
2008-10-06 2:28 ` [Q] Device error handling discussion -- Was: " Jiang, Yunhong
2008-10-14 8:33 ` Yuji Shimada
2008-10-16 7:32 ` Jiang, Yunhong
2008-10-20 7:13 ` Yuji Shimada
2008-10-23 0:21 ` Jiang, Yunhong
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