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Re: [Qemu-devel] [PATCH qemu v3] ppc/spapr: Receive and store device tre

From: Alexey Kardashevskiy
Subject: Re: [Qemu-devel] [PATCH qemu v3] ppc/spapr: Receive and store device tree blob from SLOF
Date: Tue, 18 Dec 2018 14:04:54 +1100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.3

On 18/12/2018 13:09, David Gibson wrote:
> On Mon, Dec 17, 2018 at 05:21:33PM +1100, David Gibson wrote:
>> On Fri, Dec 14, 2018 at 12:55:20PM +1100, Alexey Kardashevskiy wrote:
>>> SLOF receives a device tree and updates it with various properties
>>> before switching to the guest kernel and QEMU is not aware of any changes
>>> made by SLOF. Since there is no real RTAS (QEMU implements it), it makes
>>> sense to pass the SLOF final device tree to QEMU to let it implement
>>> RTAS related tasks better, such as PCI host bus adapter hotplug.
>>> Specifially, now QEMU can find out the actual XICS phandle (for PHB
>>> hotplug) and the RTAS linux,rtas-entry/base properties (for firmware
>>> assisted NMI - FWNMI).
>>> This stores the initial DT blob in the sPAPR machine and replaces it
>>> in the KVMPPC_H_UPDATE_DT (new private hypercall) handler.
>>> This adds an @update_dt_enabled machine property to allow backward
>>> migration.
>>> SLOF already has a hypercall since
>>> https://github.com/aik/SLOF/commit/e6fc84652c9c0073f9183
>>> This makes use of the new fdt_check_full() helper. In order to allow
>>> the configure script to pick the correct DTC version, this adjusts
>>> the DTC presense test.
>>> Signed-off-by: Alexey Kardashevskiy <address@hidden>
>> Applied, thanks.
> And now, unapplied.
> I don't know quite how, but somehow this patch is causing aarch64
> tests to SEGV.

/home/aik/p/qemu/configure --target-list=aarch64-softmmu
--source-path=/home/aik/p/qemu/ --disable-git-update --with-git=false


make -C /home/aik/pbuild/qemu-localhost-aarch64-rel/ -j24 check

did not produce segv. I am running this all on a power8 box + ubuntu
1804, what is your config?


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