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From: Elliot Berman <quic_eberman@quicinc.com>
To: Jassi Brar <jassisinghbrar@gmail.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>
Subject: Re: [PATCH v6 02/21] dt-bindings: Add binding for gunyah hypervisor
Date: Tue, 1 Nov 2022 13:35:43 -0700	[thread overview]
Message-ID: <4cb58489-cd42-1868-9add-0c360065de23@quicinc.com> (raw)
In-Reply-To: <CABb+yY08jP+Q5xvzLf=7F1tULP6-eZz5EDiK9mBj2fAv=iZa_A@mail.gmail.com>



On 11/1/2022 9:23 AM, Jassi Brar wrote:
> 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.

Dynamically created virtual machines can't be known on the dt, so there 
is nothing to specify in the DT. There couldn't be a devicetree node for 
the message queue client because that client is only exists once the VM 
is created by userspace.

As a more concrete example, there is QRTR (net/qrtr) virtualization 
support which is implemented with Gunyah message queues. Whether a QRTR 
client needs to be for VM is only determined when launching the VM as 
well as which message queue resource the QRTR client should be using. 
Since many VMs could be running on a system, it's not possible to know 
the number of mailbox controllers (i.e. message queues) nor the number 
of mailbox clients (e.g. QRTR) as a static configuration in the DT.

Thanks,
Elliot

  reply	other threads:[~2022-11-01 20:35 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-26 18:58 [PATCH v6 00/21] Drivers for gunyah hypervisor Elliot Berman
2022-10-26 18:58 ` [PATCH v6 01/21] docs: gunyah: Introduce Gunyah Hypervisor Elliot Berman
2022-11-02 12:35   ` Bagas Sanjaya
2022-10-26 18:58 ` [PATCH v6 02/21] dt-bindings: Add binding for gunyah hypervisor Elliot Berman
2022-10-27 19:57   ` Krzysztof Kozlowski
2022-10-28  2:33   ` Jassi Brar
2022-11-01  3:19     ` Elliot Berman
2022-11-01 16:23       ` Jassi Brar
2022-11-01 20:35         ` Elliot Berman [this message]
2022-11-01 21:58           ` Jassi Brar
2022-11-02  0:12             ` Elliot Berman
2022-11-02  2:01               ` Jassi Brar
2022-11-02 18:05                 ` Elliot Berman
2022-11-02 18:24                   ` Jassi Brar
2022-11-02 23:23                     ` Elliot Berman
2022-11-03  3:21                       ` Jassi Brar
2022-11-03 19:45                         ` Elliot Berman
2022-10-26 18:58 ` [PATCH v6 03/21] gunyah: Common types and error codes for Gunyah hypercalls Elliot Berman
2022-10-26 19:47   ` Dmitry Baryshkov
2022-10-26 18:58 ` [PATCH v6 04/21] arm64: smccc: Include alternative-macros.h Elliot Berman
2022-10-26 19:46   ` Dmitry Baryshkov
2022-10-26 20:23     ` Elliot Berman
2022-10-26 20:39       ` Dmitry Baryshkov
2022-10-26 18:58 ` [PATCH v6 05/21] virt: gunyah: Add hypercalls to identify Gunyah Elliot Berman
2022-10-26 18:58 ` [PATCH v6 06/21] virt: gunyah: Identify hypervisor version Elliot Berman
2022-10-26 18:58 ` [PATCH v6 07/21] mailbox: Allow direct registration to a channel Elliot Berman
2022-10-26 18:58 ` [PATCH v6 08/21] virt: gunyah: msgq: Add hypercalls to send and receive messages Elliot Berman
2022-10-26 18:58 ` [PATCH v6 09/21] mailbox: Add Gunyah message queue mailbox Elliot Berman
2022-10-27 13:55   ` Pavan Kondeti
2022-11-01 17:44     ` Elliot Berman
2022-10-26 18:58 ` [PATCH v6 10/21] gunyah: rsc_mgr: Add resource manager RPC core Elliot Berman
2022-11-01 18:02   ` Greg Kroah-Hartman
2022-11-02  0:12     ` Elliot Berman
2022-11-02  2:53       ` Greg Kroah-Hartman
2022-11-02 18:04         ` Elliot Berman
2022-11-03  0:22           ` Greg Kroah-Hartman
2022-11-03 22:07             ` Elliot Berman
2022-11-03 22:09             ` Elliot Berman
2022-10-26 18:58 ` [PATCH v6 11/21] gunyah: rsc_mgr: Add subdevices bus Elliot Berman
2022-10-26 18:58 ` [PATCH v6 12/21] gunyah: rsc_mgr: Add VM lifecycle RPC Elliot Berman
2022-10-26 18:58 ` [PATCH v6 13/21] gunyah: vm_mgr: Introduce basic VM Manager Elliot Berman
2022-11-02  5:14   ` Greg Kroah-Hartman
2022-11-02 18:45     ` Elliot Berman
2022-11-03  0:24       ` Greg Kroah-Hartman
2022-11-04  0:11         ` Elliot Berman
2022-11-04  8:10           ` Arnd Bergmann
2022-11-04 22:38             ` Elliot Berman
2022-11-05  4:19               ` Trilok Soni
2022-11-11  0:03                 ` Elliot Berman
2022-11-11  6:24                   ` Greg Kroah-Hartman
2022-11-11 17:08                     ` Elliot Berman
2022-11-02  7:31   ` Arnd Bergmann
2022-11-02 18:44     ` Elliot Berman
2022-11-03  0:20       ` Greg Kroah-Hartman
2022-11-03 22:33         ` Elliot Berman
2022-11-03  9:39       ` Arnd Bergmann
2022-11-03 22:10         ` Elliot Berman
2022-10-26 18:58 ` [PATCH v6 14/21] gunyah: rsc_mgr: Add RPC for sharing memory Elliot Berman
2022-10-26 18:58 ` [PATCH v6 15/21] gunyah: vm_mgr: Add/remove user memory regions Elliot Berman
2022-10-26 18:58 ` [PATCH v6 16/21] gunyah: vm_mgr: Add ioctls to support basic non-proxy VM boot Elliot Berman
2022-10-26 18:58 ` [PATCH v6 17/21] samples: Add sample userspace Gunyah VM Manager Elliot Berman
2022-10-26 18:58 ` [PATCH v6 18/21] gunyah: rsc_mgr: Add platform ops on mem_lend/mem_reclaim Elliot Berman
2022-10-26 18:58 ` [PATCH v6 19/21] firmware: qcom_scm: Use fixed width src vm bitmap Elliot Berman
2022-10-26 18:58 ` [PATCH v6 20/21] firmware: qcom_scm: Register Gunyah platform ops Elliot Berman
2022-10-26 21:32   ` kernel test robot
2022-10-26 18:58 ` [PATCH v6 21/21] docs: gunyah: Document Gunyah VM Manager Elliot Berman
2022-11-02 13:05   ` Bagas Sanjaya
2022-11-02 18:04     ` Elliot Berman

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