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Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region |
Date: |
Wed, 29 Jul 2015 13:59:14 +0200 |
On Wed, 29 Jul 2015 12:48:18 +0300
Pavel Fedin <address@hidden> wrote:
> Hello!
>
> > this is wrong since dword is too small for values of high memory
> > use aml_qword_memory() instead
>
> Thanks, will fix it.
>
> > since window is at fixed position and it's not possible for guest to
> > move base address of the range, make AddressMaximum the same as
> > AddressMinimum i.e.
>
> But it is anyway not possible. On ARM hardware PCI range addresses are
> normally hardwired (at least
> on simple machine which we are emulating), and the OS doesn't have control
> over it. And i'm not sure
> whether some hotplugged memory can be overlaid on top of it. This is because
> on PC PCI is a core
> system bus, which represents all address space, and RAM is kind of plugged
> into it. On ARM another
> buses are used for system core, and PCI controller, from the point of view of
> that bus, is a single
> device, which occupies some space. So AFAIK having something else on top of
> PCI hole on ARM would be
> abnormal.
I don't suggest to have something mapped on top of the window,
Suggestion was to just use the same value for
AddressMaximum and AddressMinimum arguments in aml_qword_memory() call.
>
> Kind regards,
> Pavel Fedin
> Expert Engineer
> Samsung Electronics Research center Russia
>
>
>
- Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region, (continued)
- Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region, Igor Mammedov, 2015/07/29
- Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region, Pavel Fedin, 2015/07/29
- Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region, Peter Maydell, 2015/07/29
- Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region, Igor Mammedov, 2015/07/29
- Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region, Pavel Fedin, 2015/07/29
- Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region, Peter Maydell, 2015/07/29
Re: [Qemu-devel] [PATCH v3] hw/arm/virt: Add high MMIO PCI region, Igor Mammedov, 2015/07/29