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Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before gues
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts |
Date: |
Tue, 19 Mar 2019 14:12:32 +0100 |
On Tue, 19 Mar 2019 12:53:49 +0000
Peter Maydell <address@hidden> wrote:
> On Tue, 19 Mar 2019 at 12:42, Igor Mammedov <address@hidden> wrote:
> > on aarch(64) we also load dtb into main RAM currently only on boot,
>
> Hmm? We load the DTB in hw/arm/boot.c using rom_add_blob_fixed_as(),
> which means that it will use this "rom blob loading" mechanism,
> so it should be re-copied into RAM on reset.
yep, you are right I confused it with with mutable content issue
below.
> > and I was planning to move it to reset stage to accommodate
> > hotplug usecase so that guest would pick up hotplugged
> > devices after reboot.
>
> The problem here is that this is trying to change the
> contents of the DTB blob on a reboot, which is not
> supported by the ROM blob mechanism, which assumes that
> these things are immutable.
That was the problem I've actually met.
>
> thanks
> -- PMM
- Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, (continued)
- Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Jia He, 2019/03/19
- Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Dr. David Alan Gilbert, 2019/03/19
- Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Peter Maydell, 2019/03/19
- Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Dr. David Alan Gilbert, 2019/03/19
- Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Peter Maydell, 2019/03/19
- Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Dr. David Alan Gilbert, 2019/03/19
- Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Igor Mammedov, 2019/03/19
- Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Peter Maydell, 2019/03/19
- Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts,
Igor Mammedov <=
- Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Yury Kotov, 2019/03/21
Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Yury Kotov, 2019/03/19