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Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI
From: |
Arnd Bergmann |
Subject: |
Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation |
Date: |
Thu, 06 Nov 2014 14:33:16 +0100 |
User-agent: |
KMail/4.11.5 (Linux/3.16.0-10-generic; KDE/4.11.5; x86_64; ; ) |
On Thursday 06 November 2014 13:30:01 Mark Rutland wrote:
>
> There is no way of doing this with DT. There has been work into DT
> fragments/overlays where portions can be added to the tree dynamically,
> but that's controlled by the OS rather than the hypervisor, and there's
> no standard for communicating what has been hotplugged to trigger
> changes to the tree, so it's not quite the same. It really only works
> for tightly coupled hw/kernel/userspace combinations (i.e. embedded).
>
> Depending on how you implement the hot-add/remove you might be able to
> get away with an initial static configuration translated from DT. If you
> need to describe what might be hotplugged from the start, then I suspect
> you cannot get away with translating a DT in general.
I believe IBM POWER 5/6/7 servers have an interface to update the DT
from the hypervisor, but it's not a nice interface, so we may want to
avoid duplicating that.
Arnd
- Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation, (continued)
- Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation, Arnd Bergmann, 2014/11/12
- Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation, Christoffer Dall, 2014/11/12
- Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation, Mark Rutland, 2014/11/12
- Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation, Peter Maydell, 2014/11/12
- Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation, Claudio Fontana, 2014/11/13
Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation, Hanjun Guo, 2014/11/06