linux-kernel - Re: [PATCH] KVM: PPC: Book3S HV: read ibm,secure-memory nodes

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Message-Id: <db211c9c-3e6c-761c-8c9f-4110d3c0fcbe@linux.ibm.com>
Date:   Tue, 21 Apr 2020 19:39:31 +0200
From:   Laurent Dufour <ldufour@...ux.ibm.com>
To:     "Oliver O'Halloran" <oohall@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     kvm-ppc@...r.kernel.org,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        Paul Mackerras <paulus@...ba.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] KVM: PPC: Book3S HV: read ibm,secure-memory nodes

Le 21/04/2020 à 15:43, Oliver O'Halloran a écrit :
> On Tue, Apr 21, 2020 at 11:37 PM Michael Ellerman <mpe@...erman.id.au> wrote:
>>
>> Hi Laurent,
>>
>> Laurent Dufour <ldufour@...ux.ibm.com> writes:
>>> The newly introduced ibm,secure-memory nodes supersede the
>>> ibm,uv-firmware's property secure-memory-ranges.
>>
>> Is either documented in a device tree binding document anywhere?
>>
>> cheers
>>
>>> Firmware will no more expose the secure-memory-ranges property so first
>>> read the new one and if not found rollback to the older one.
> 
> There's some in Ryan's UV support series for skiboot:
> 
> https://patchwork.ozlabs.org/project/skiboot/patch/20200227204023.22125-2-grimm@linux.ibm.com/
> 
> ...which is also marked RFC. Cool.

Thanks Oliver for this pointer.

Yes this is an RFC but this documentation details the secure memory nodes 
created by skiboot and parsed by this patch.

Michael, is that enough for you?

Laurent.