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Re: [Qemu-devel] How to reserve guest physical region for ACPI
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] How to reserve guest physical region for ACPI |
Date: |
Thu, 7 Jan 2016 14:51:13 +0100 |
On Mon, 4 Jan 2016 21:17:31 +0100
Laszlo Ersek <address@hidden> wrote:
> Michael CC'd me on the grandparent of the email below. I'll try to add
> my thoughts in a single go, with regard to OVMF.
>
> On 12/30/15 20:52, Michael S. Tsirkin wrote:
> > On Wed, Dec 30, 2015 at 04:55:54PM +0100, Igor Mammedov wrote:
> >> On Mon, 28 Dec 2015 14:50:15 +0200
> >> "Michael S. Tsirkin" <address@hidden> wrote:
> >>
> >>> On Mon, Dec 28, 2015 at 10:39:04AM +0800, Xiao Guangrong wrote:
> >>>>
> >>>> Hi Michael, Paolo,
> >>>>
> >>>> Now it is the time to return to the challenge that how to reserve guest
> >>>> physical region internally used by ACPI.
> >>>>
> >>>> Igor suggested that:
> >>>> | An alternative place to allocate reserve from could be high memory.
> >>>> | For pc we have "reserved-memory-end" which currently makes sure
> >>>> | that hotpluggable memory range isn't used by firmware
> >>>> (https://lists.nongnu.org/archive/html/qemu-devel/2015-11/msg00926.html)
> >>>>
>
> OVMF has no support for the "reserved-memory-end" fw_cfg file. The
> reason is that nobody wrote that patch, nor asked for the patch to be
> written. (Not implying that just requesting the patch would be
> sufficient for the patch to be written.)
Hijacking this part of thread to check if OVMF would work with memory-hotplug
and if it needs "reserved-memory-end" support at all.
How OVMF determines which GPA ranges to use for initializing PCI BARs
at boot time, more specifically 64-bit BARs.
- Re: [Qemu-devel] How to reserve guest physical region for ACPI, Igor Mammedov, 2016/01/05
- Re: [Qemu-devel] How to reserve guest physical region for ACPI, Michael S. Tsirkin, 2016/01/05
- Re: [Qemu-devel] How to reserve guest physical region for ACPI, Laszlo Ersek, 2016/01/05
- Re: [Qemu-devel] How to reserve guest physical region for ACPI, Xiao Guangrong, 2016/01/05
- Re: [Qemu-devel] How to reserve guest physical region for ACPI, Igor Mammedov, 2016/01/07
- Re: [Qemu-devel] How to reserve guest physical region for ACPI, Xiao Guangrong, 2016/01/07
- Re: [Qemu-devel] How to reserve guest physical region for ACPI, Laszlo Ersek, 2016/01/08
- Re: [Qemu-devel] How to reserve guest physical region for ACPI, Igor Mammedov, 2016/01/08
- Re: [Qemu-devel] How to reserve guest physical region for ACPI, Igor Mammedov, 2016/01/07