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Re: [Qemu-arm] [PATCH] ARM: Virt: Don't generate RTC ACPI node when usin

From: Peter Maydell
Subject: Re: [Qemu-arm] [PATCH] ARM: Virt: Don't generate RTC ACPI node when using UEFI
Date: Tue, 12 Jan 2016 15:30:39 +0000

On 12 January 2016 at 15:24, Shannon Zhao <address@hidden> wrote:
> When booting VM through UEFI, UEFI takes ownership of the RTC hardware.
> To DTB UEFI could call libfdt api to disable the RTC device node, but to
> ACPI it couldn't do that. Therefore, we don't generate the RTC ACPI
> device in QEMU when using UEFI.

I don't really understand this. I thought that if we were
using ACPI then we would always be doing it via UEFI?

Also I think if UEFI wants to take command of some of the
hardware it ought to be UEFI's job to adjust the tables
accordingly before it passes them on to the guest OS.

-- PMM

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