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Re: [Qemu-devel] [PATCH v2 1/5] fw_cfg: document fw_cfg_modify_iXX() upd
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From: |
Peter Maydell |
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Subject: |
Re: [Qemu-devel] [PATCH v2 1/5] fw_cfg: document fw_cfg_modify_iXX() update functions |
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Date: |
Tue, 1 Sep 2015 21:30:51 +0100 |
On 1 September 2015 at 21:27, Gabriel L. Somlo <address@hidden> wrote:
> Right, that's what I'm trying to do -- expose fw_cfg in
> /sys/firmware/... on the guest -- which involves figuring out how
> to determine if it is present (DT on ARM, blindly poking port 0x510
> on x86 for now, hence my interest in having it listed in ACPI).
>
> Now, if we did expose fw_cfg in ACPI on *both* ARM and x86, I wonder
> I could get away with an ACPI-only detection scheme across both
> architectures...
Nope, because there's no requirement for ACPI on ARM -- you could
be booting the kernel via device tree.
thanks
-- PMM