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Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before gues
From: |
Peter Maydell |
Subject: |
Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts |
Date: |
Tue, 19 Mar 2019 12:53:49 +0000 |
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.
> 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.
thanks
-- PMM
- [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Yury Kotov, 2019/03/14
- 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 <=
- 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, Yury Kotov, 2019/03/21
Re: [Qemu-devel] [RFC PATCH] QEMU may write to system_memory before guest starts, Yury Kotov, 2019/03/19