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

From: David Gibson
Subject: Re: [Qemu-ppc] [PATCH qemu v3] ppc/spapr: Receive and store device tree blob from SLOF
Date: Tue, 18 Dec 2018 13:09:24 +1100
User-agent: Mutt/1.10.1 (2018-07-13)

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.

David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!

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