Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <20221026185846.3983888-1-quic_eberman@quicinc.com>
 <20221026185846.3983888-3-quic_eberman@quicinc.com> <CABb+yY3JVNPG3dcyHNFxEeGEu3MN_pAOh3+cwexPPe2YG6SNUg@mail.gmail.com>
 <fb7e101f-8de0-d77e-30e1-74b882b19583@quicinc.com>
In-Reply-To: <fb7e101f-8de0-d77e-30e1-74b882b19583@quicinc.com>
From:   Jassi Brar <jassisinghbrar@gmail.com>
Date:   Tue, 1 Nov 2022 11:23:35 -0500
Message-ID: <CABb+yY08jP+Q5xvzLf=7F1tULP6-eZz5EDiK9mBj2fAv=iZa_A@mail.gmail.com>
Subject: Re: [PATCH v6 02/21] dt-bindings: Add binding for gunyah hypervisor
To:     Elliot Berman <quic_eberman@quicinc.com>
Cc:     Bjorn Andersson <quic_bjorande@quicinc.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Murali Nalajala <quic_mnalajal@quicinc.com>,
        Trilok Soni <quic_tsoni@quicinc.com>,
        Srivatsa Vaddagiri <quic_svaddagi@quicinc.com>,
        Carl van Schaik <quic_cvanscha@quicinc.com>,
        Prakruthi Deepak Heragu <quic_pheragu@quicinc.com>,
        Andy Gross <agross@kernel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        linux-arm-kernel@lists.infradead.org,
        Mark Rutland <mark.rutland@arm.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Sudeep Holla <sudeep.holla@arm.com>,
        Marc Zyngier <maz@kernel.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Will Deacon <will@kernel.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Amol Maheshwari <amahesh@qti.qualcomm.com>,
        Kalle Valo <kvalo@kernel.org>, devicetree@vger.kernel.org,
        linux-doc@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        linux-kernel@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Mon, Oct 31, 2022 at 10:20 PM Elliot Berman <quic_eberman@quicinc.com> wrote:
>
> Hi Jassi,
>
> On 10/27/2022 7:33 PM, Jassi Brar wrote:
>  > On Wed, Oct 26, 2022 at 1:59 PM Elliot Berman
> <quic_eberman@quicinc.com> wrote:
>  > .....
>  >> +
>  >> +        gunyah-resource-mgr@0 {
>  >> +            compatible = "gunyah-resource-manager-1-0",
> "gunyah-resource-manager";
>  >> +            interrupts = <GIC_SPI 3 IRQ_TYPE_EDGE_RISING>, /* TX
> full IRQ */
>  >> +                         <GIC_SPI 4 IRQ_TYPE_EDGE_RISING>; /* RX
> empty IRQ */
>  >> +            reg = <0x00000000 0x00000000>, <0x00000000 0x00000001>;
>  >> +                  /* TX, RX cap ids */
>  >> +        };
>  >>
>  > All these resources are used only by the mailbox controller driver.
>  > So, this should be the mailbox controller node, rather than the
>  > mailbox user.> One option is to load gunyah-resource-manager as a
> module that relies
>  > on the gunyah-mailbox provider. That would also avoid the "Allow
>  > direct registration to a channel" hack patch.
>
> A message queue to another guest VM wouldn't be known at boot time and
> thus couldn't be described on the devicetree.
>
I think you need to implement of_xlate() ... or please tell me what
exactly you need to specify in the dt.

thnx.