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Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1G
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6) |
Date: |
Wed, 11 Dec 2013 17:51:42 +0200 |
On Wed, Dec 11, 2013 at 04:41:08PM +0100, Paolo Bonzini wrote:
> Il 11/12/2013 16:39, Michael S. Tsirkin ha scritto:
> > > 2GB low memory for q35 is a bit wasteful,
> > > but we have some time to fix that before release.
> >
> > How would you fix that?
>
> Just use 1GB, coupled with reducing the default MMCONFIG size to 128
> buses.
> That's already ~40 PCIe devices
This is not really enough, people requested more than 40 devices.
We will likely need multiroot down the road because some people want
more than 256 devices ...
> if you count upstream/downstream
> ports in addition to the actual device, and you can also use PCIe-to-PCI
> bridges if you need more room.
>
> Paolo
We don't want people to use PCI down the road.
Everything should be PCIE so we can use things like native hotplug.
--
MST
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), (continued)
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Michael S. Tsirkin, 2013/12/10
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Marcelo Tosatti, 2013/12/10
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Marcelo Tosatti, 2013/12/10
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Michael S. Tsirkin, 2013/12/10
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Marcelo Tosatti, 2013/12/11
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Michael S. Tsirkin, 2013/12/11
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Paolo Bonzini, 2013/12/11
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Michael S. Tsirkin, 2013/12/11
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Paolo Bonzini, 2013/12/11
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6),
Michael S. Tsirkin <=
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Igor Mammedov, 2013/12/11
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Paolo Bonzini, 2013/12/11
- Re: [Qemu-devel] [PATCH rebased for-1.8] i386: pc: align gpa<->hpa on 1GB boundary (v6), Marcelo Tosatti, 2013/12/11