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RE: [Xen-ia64-devel] Re: [Xen-devel] [PATCH] Add lost logic for VGAiniti
| To: | "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, "Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-ia64-devel] Re: [Xen-devel] [PATCH] Add lost logic for VGAinitialization |
| From: | "Tian, Kevin" <kevin.tian@xxxxxxxxx> |
| Date: | Wed, 26 Jul 2006 16:54:37 +0800 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx, xen-ia64-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Wed, 26 Jul 2006 01:55:16 -0700 |
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| Thread-index: | AcawhGfoo7ecxRXORF+6NgSk96XxdQAC8Gww |
| Thread-topic: | [Xen-ia64-devel] Re: [Xen-devel] [PATCH] Add lost logic for VGAinitialization |
>From: Keir Fraser >Sent: 2006年7月26日 15:15 > > >On 26 Jul 2006, at 05:46, Zhang, Xiantao wrote: > >> This patch adds lost logic for vga initialization. It was lost after >> changing to new Qemu. >> Signed-off-by : Kevin Tian <kevin.tian@xxxxxxxxx> >> Signed-off-by : Zhang Xiantao <xiantao.zhang@xxxxxxxxx> > >How come the new qemu code seems to have perfectly working VGA >without >this patch? > > -- Keir > It's IA64 specific. On xen/x86, vga bios is copied to 0xD0000 by guest firmware. However on ia64 platform, native firmware depends on some initialization vga state at power on and so does guest firmware. That's why that vga bios initialization stub is required for vti domain, to match platform requirement. Thanks Kevin _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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