Re: [PATCH v16 01/34] docs: gunyah: Introduce Gunyah Hypervisor

From: Randy Dunlap
Date: Tue Jan 09 2024 - 19:32:06 EST




On 1/9/24 16:28, Elliot Berman wrote:
>
>
> On 1/9/2024 3:31 PM, Randy Dunlap wrote:
>>
>>
>> On 1/9/24 11:37, Elliot Berman wrote:
>>> Gunyah is an open-source Type-1 hypervisor developed by Qualcomm. It
>>> does not depend on any lower-privileged OS/kernel code for its core
>>> functionality. This increases its security and can support a smaller
>>> trusted computing based when compared to Type-2 hypervisors.
>>>
>>> Add documentation describing the Gunyah hypervisor and the main
>>> components of the Gunyah hypervisor which are of interest to Linux
>>> virtualization development.
>>>
>>> Signed-off-by: Elliot Berman <quic_eberman@xxxxxxxxxxx>
>>> ---
>>> Documentation/virt/gunyah/index.rst | 134 ++++++++++++++++++++++++++++
>>> Documentation/virt/gunyah/message-queue.rst | 68 ++++++++++++++
>>> Documentation/virt/index.rst | 1 +
>>> 3 files changed, 203 insertions(+)
>>>
>>> diff --git a/Documentation/virt/gunyah/index.rst b/Documentation/virt/gunyah/index.rst
>>> new file mode 100644
>>> index 000000000000..da8e5e4b9cac
>>> --- /dev/null
>>> +++ b/Documentation/virt/gunyah/index.rst
>>> @@ -0,0 +1,134 @@
>>> +.. SPDX-License-Identifier: GPL-2.0
>>> +
>>> +=================
>>> +Gunyah Hypervisor
>>> +=================
>>> +
>>> +.. toctree::
>>> + :maxdepth: 1
>>> +
>>> + message-queue
>>> +
>>> +Gunyah is a Type-1 hypervisor which is independent of any OS kernel, and runs in
>>> +a higher CPU privilege level. It does not depend on any lower-privileged
>>
>> Is this the usual meaning of higher and lower? Seems backwards to me.
>>
>
> Hmm, I guess this x86 having ring 0 as most privileged and arm using EL3 as most
> privileged. I'll switch to "more" and "less" privilege rather than implying
> a numbering scheme.

I suspected that. Thanks for the change.

--
#Randy