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Re: [Qemu-devel] [PATCH 11/25] q35: Introduce q35 pc based chipset emula
From: |
Alex Williamson |
Subject: |
Re: [Qemu-devel] [PATCH 11/25] q35: Introduce q35 pc based chipset emulator |
Date: |
Tue, 18 Sep 2012 15:28:44 -0600 |
On Fri, 2012-09-14 at 09:37 +0200, Gerd Hoffmann wrote:
> On 09/13/12 22:12, Jason Baron wrote:
> > + if (ram_size >= 0xe0000000) {
> > + above_4g_mem_size = ram_size - 0xe0000000;
> > + below_4g_mem_size = 0xe0000000;
>
> We should make the hole larger to get more pci i/o address space below
> 4G, especially as q35 needs a good chunk of it for mmconfig.
>
> I think at least 0xc0000000, maybe even 0xb0000000. The later would
> allow to place mmconfig @ 0xb0000000, one big 512MB pci bar @ 0xc0000000
> (think gfx card pass-through) and all the remaining little stuff above
> 0xe0000000.
We also seem to be missing logic in seabios to avoid assigning pci bars
to the mmconfig area. I just tried to assign a graphics card and put it
right over it. Thanks,
Alex
- [Qemu-devel] [PATCH 22/25] ahci: properly reset PxCMD on HBA reset, (continued)
- [Qemu-devel] [PATCH 22/25] ahci: properly reset PxCMD on HBA reset, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 01/25] pci: pci capability must be in PCI space, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 05/25] pc, pc_piix: split out pc nic initialization, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 19/25] ahci: add migration support, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 21/25] pcie_aer: clear cmask for Advanced Error Interrupt Message Number, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 11/25] q35: Introduce q35 pc based chipset emulator, Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 24/25] Add a fallback bios file search, if -L fails., Jason Baron, 2012/09/13
- [Qemu-devel] [PATCH 16/25] pci: Add class 0xc05 as 'SMBus', Jason Baron, 2012/09/13