From: Alex Elder <elder@linaro.org>
To: Elliot Berman <quic_eberman@quicinc.com>,
Alex Elder <elder@linaro.org>,
Bjorn Andersson <quic_bjorande@quicinc.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Murali Nalajala <quic_mnalajal@quicinc.com>
Cc: 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>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Jonathan Corbet <corbet@lwn.net>,
Bagas Sanjaya <bagasdotme@gmail.com>,
Jassi Brar <jassisinghbrar@gmail.com>,
Sudeep Holla <sudeep.holla@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Lorenzo Pieralisi <lpieralisi@kernel.org>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org
Subject: Re: [PATCH v8 05/28] virt: gunyah: Add hypercalls to identify Gunyah
Date: Tue, 17 Jan 2023 13:20:58 -0600 [thread overview]
Message-ID: <b2819f68-8672-4909-c787-d1bdbd35da2e@linaro.org> (raw)
In-Reply-To: <4e8a7fdf-8c91-cf2f-d369-c67b7584f580@quicinc.com>
On 1/10/23 11:56 AM, Elliot Berman wrote:
>>> There are two calls to help identify Gunyah:
>>>
>>> 1. gh_hypercall_get_uid() returns a UID when running under a Gunyah
>>> hypervisor.
>>> 2. gh_hypercall_hyp_identify() returns build information and a set of
>>> feature flags that are supported by Gunyah.
>>
>> The first is a "service", while the second is a "hypercall".
>> Can you explain the distinction? The sentence at the top
>> refers to both as "hypercalls".
>>
>
> I learned more details about this to answer your question. "get_uid()"
> is a standardized call that is ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID
> defined in include/arm-smccc.h. I'll use that.
You didn't really explain the distinction between hypercall
and service in Gunyah. Both are encoded as "vendor specific
hypervisor service calls" according to the SVCCC specification.
I haven't found where ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID
gets handled, but I accept your answer that it's basically
a standard call. The "get UID" is the only one that's defined
as a Gunyah "service"; the rest are hypercalls.
It's not a big deal, I just noticed the difference and was
curious about it.
-Alex
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WARNING: multiple messages have this Message-ID (diff)
From: Alex Elder <elder@linaro.org>
To: Elliot Berman <quic_eberman@quicinc.com>,
Alex Elder <elder@linaro.org>,
Bjorn Andersson <quic_bjorande@quicinc.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Murali Nalajala <quic_mnalajal@quicinc.com>
Cc: 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>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Jonathan Corbet <corbet@lwn.net>,
Bagas Sanjaya <bagasdotme@gmail.com>,
Jassi Brar <jassisinghbrar@gmail.com>,
Sudeep Holla <sudeep.holla@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Lorenzo Pieralisi <lpieralisi@kernel.org>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org
Subject: Re: [PATCH v8 05/28] virt: gunyah: Add hypercalls to identify Gunyah
Date: Tue, 17 Jan 2023 13:20:58 -0600 [thread overview]
Message-ID: <b2819f68-8672-4909-c787-d1bdbd35da2e@linaro.org> (raw)
In-Reply-To: <4e8a7fdf-8c91-cf2f-d369-c67b7584f580@quicinc.com>
On 1/10/23 11:56 AM, Elliot Berman wrote:
>>> There are two calls to help identify Gunyah:
>>>
>>> 1. gh_hypercall_get_uid() returns a UID when running under a Gunyah
>>> hypervisor.
>>> 2. gh_hypercall_hyp_identify() returns build information and a set of
>>> feature flags that are supported by Gunyah.
>>
>> The first is a "service", while the second is a "hypercall".
>> Can you explain the distinction? The sentence at the top
>> refers to both as "hypercalls".
>>
>
> I learned more details about this to answer your question. "get_uid()"
> is a standardized call that is ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID
> defined in include/arm-smccc.h. I'll use that.
You didn't really explain the distinction between hypercall
and service in Gunyah. Both are encoded as "vendor specific
hypervisor service calls" according to the SVCCC specification.
I haven't found where ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID
gets handled, but I accept your answer that it's basically
a standard call. The "get UID" is the only one that's defined
as a Gunyah "service"; the rest are hypercalls.
It's not a big deal, I just noticed the difference and was
curious about it.
-Alex
next prev parent reply other threads:[~2023-01-17 19:22 UTC|newest]
Thread overview: 137+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-19 22:58 [PATCH v8 00/28] Drivers for gunyah hypervisor Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 01/28] docs: gunyah: Introduce Gunyah Hypervisor Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-09 21:34 ` Alex Elder
2023-01-09 21:34 ` Alex Elder
2023-01-10 17:54 ` Elliot Berman
2023-01-10 17:54 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 02/28] dt-bindings: Add binding for gunyah hypervisor Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-09 21:34 ` Alex Elder
2023-01-09 21:34 ` Alex Elder
2022-12-19 22:58 ` [PATCH v8 03/28] gunyah: Common types and error codes for Gunyah hypercalls Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-09 21:34 ` Alex Elder
2023-01-09 21:34 ` Alex Elder
2023-01-10 17:55 ` Elliot Berman
2023-01-10 17:55 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 04/28] arm64: smccc: Include alternative-macros.h Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-09 21:34 ` Alex Elder
2023-01-09 21:34 ` Alex Elder
2023-01-10 22:55 ` Elliot Berman
2023-01-10 22:55 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 05/28] virt: gunyah: Add hypercalls to identify Gunyah Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-09 21:34 ` Alex Elder
2023-01-09 21:34 ` Alex Elder
2023-01-10 17:56 ` Elliot Berman
2023-01-10 17:56 ` Elliot Berman
2023-01-17 19:20 ` Alex Elder
2023-01-17 19:20 ` Alex Elder
2023-01-17 19:20 ` Alex Elder [this message]
2023-01-17 19:20 ` Alex Elder
2023-01-17 22:29 ` Elliot Berman
2023-01-17 22:29 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 06/28] virt: gunyah: Identify hypervisor version Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-09 21:34 ` Alex Elder
2023-01-09 21:34 ` Alex Elder
2023-01-10 17:56 ` Elliot Berman
2023-01-10 17:56 ` Elliot Berman
2023-01-17 19:21 ` Alex Elder
2023-01-17 19:21 ` Alex Elder
2023-01-17 22:29 ` Elliot Berman
2023-01-17 22:29 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 07/28] mailbox: Allow direct registration to a channel Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-09 21:34 ` Alex Elder
2023-01-09 21:34 ` Alex Elder
2023-01-10 17:57 ` Elliot Berman
2023-01-10 17:57 ` Elliot Berman
2023-01-17 19:21 ` Alex Elder
2023-01-17 19:21 ` Alex Elder
2022-12-19 22:58 ` [PATCH v8 08/28] virt: gunyah: msgq: Add hypercalls to send and receive messages Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 09/28] mailbox: Add Gunyah message queue mailbox Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-02 6:13 ` Srivatsa Vaddagiri
2023-01-02 6:13 ` Srivatsa Vaddagiri
2023-01-04 0:32 ` Elliot Berman
2023-01-04 0:32 ` Elliot Berman
2023-01-09 21:34 ` Alex Elder
2023-01-09 21:34 ` Alex Elder
2023-01-10 18:16 ` Elliot Berman
2023-01-10 18:16 ` Elliot Berman
2023-01-17 19:21 ` Alex Elder
2023-01-17 19:21 ` Alex Elder
2022-12-19 22:58 ` [PATCH v8 10/28] gunyah: rsc_mgr: Add resource manager RPC core Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-17 22:33 ` Alex Elder
2023-01-17 22:33 ` Alex Elder
2023-01-20 23:18 ` Elliot Berman
2023-01-20 23:18 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 11/28] gunyah: rsc_mgr: Add VM lifecycle RPC Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-09 7:13 ` Srivatsa Vaddagiri
2023-01-09 7:13 ` Srivatsa Vaddagiri
2023-01-09 18:51 ` Elliot Berman
2023-01-09 18:51 ` Elliot Berman
2023-01-18 18:26 ` Alex Elder
2023-01-18 18:26 ` Alex Elder
2023-01-20 1:31 ` Elliot Berman
2023-01-20 1:31 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 12/28] gunyah: vm_mgr: Introduce basic VM Manager Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-09 9:05 ` Srivatsa Vaddagiri
2023-01-09 9:05 ` Srivatsa Vaddagiri
2023-01-09 19:38 ` Elliot Berman
2023-01-09 19:38 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 13/28] gunyah: rsc_mgr: Add RPC for sharing memory Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-16 8:45 ` Srivatsa Vaddagiri
2023-01-16 8:45 ` Srivatsa Vaddagiri
2022-12-19 22:58 ` [PATCH v8 14/28] gunyah: vm_mgr: Add/remove user memory regions Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-20 5:34 ` Srivatsa Vaddagiri
2023-01-20 5:34 ` Srivatsa Vaddagiri
2022-12-19 22:58 ` [PATCH v8 15/28] gunyah: vm_mgr: Add ioctls to support basic non-proxy VM boot Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 16/28] samples: Add sample userspace Gunyah VM Manager Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 17/28] gunyah: rsc_mgr: Add platform ops on mem_lend/mem_reclaim Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 18/28] firmware: qcom_scm: Use fixed width src vm bitmap Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 19/28] firmware: qcom_scm: Register Gunyah platform ops Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-23 17:21 ` kernel test robot
2022-12-19 22:58 ` [PATCH v8 20/28] docs: gunyah: Document Gunyah VM Manager Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 21/28] virt: gunyah: Translate gh_rm_hyp_resource into gunyah_resource Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 22/28] gunyah: vm_mgr: Add framework to add VM Functions Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 23/28] virt: gunyah: Add resource tickets Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 24/28] virt: gunyah: Add IO handlers Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 25/28] virt: gunyah: Add proxy-scheduled vCPUs Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 26/28] virt: gunyah: Add hypercalls for sending doorbell Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-19 22:58 ` [PATCH v8 27/28] virt: gunyah: Add irqfd interface Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2022-12-21 17:00 ` kernel test robot
2022-12-19 22:58 ` [PATCH v8 28/28] virt: gunyah: Add ioeventfd Elliot Berman
2022-12-19 22:58 ` Elliot Berman
2023-01-09 21:34 ` [PATCH v8 00/28] Drivers for gunyah hypervisor Alex Elder
2023-01-09 21:34 ` Alex Elder
2023-01-10 17:54 ` Elliot Berman
2023-01-10 17:54 ` Elliot Berman
2023-01-10 21:47 ` Elliot Berman
2023-01-10 21:47 ` Elliot Berman
2023-01-17 19:20 ` Alex Elder
2023-01-17 19:20 ` Alex Elder
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