From: Shuo A Liu <shuo.a.liu@intel.com>
To: Randy Dunlap <rdunlap@infradead.org>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"H . Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Yu Wang <yu1.wang@intel.com>,
Reinette Chatre <reinette.chatre@intel.com>,
Zhi Wang <zhi.a.wang@intel.com>, Borislav Petkov <bp@suse.de>,
Dave Hansen <dave.hansen@intel.com>,
Sen Christopherson <sean.j.christopherson@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Fengwei Yin <fengwei.yin@intel.com>,
Zhenyu Wang <zhenyuw@linux.intel.com>
Subject: Re: [PATCH v9 01/18] docs: acrn: Introduce ACRN
Date: Tue, 9 Feb 2021 09:24:07 +0800 [thread overview]
Message-ID: <20210209012407.GC15601@shuo-intel.sh.intel.com> (raw)
In-Reply-To: <6ae2679c-e172-a955-9df5-2b54b79dd854@infradead.org>
Hi Randy,
On Mon 8.Feb'21 at 11:48:07 -0800, Randy Dunlap wrote:
>On 2/6/21 7:10 PM, shuo.a.liu@intel.com wrote:
>> From: Shuo Liu <shuo.a.liu@intel.com>
>>
>> Add documentation on the following aspects of ACRN:
>>
>> 1) A brief introduction on the architecture of ACRN.
>> 2) I/O request handling in ACRN.
>> 3) CPUID functions of ACRN.
>
>> ---
>
>> diff --git a/Documentation/virt/acrn/io-request.rst b/Documentation/virt/acrn/io-request.rst
>> new file mode 100644
>> index 000000000000..6cc3ea0fa1f5
>> --- /dev/null
>> +++ b/Documentation/virt/acrn/io-request.rst
>> @@ -0,0 +1,97 @@
>> +.. SPDX-License-Identifier: GPL-2.0
>> +
>> +I/O request handling
>> +====================
>> +
>...
>> +
>> +1. I/O request
>> +--------------
>> +
>> +For each User VM, there is a shared 4-KByte memory region used for I/O requests
>> +communication between the hypervisor and Service VM. An I/O request is a
>> +256-byte structure buffer, which is 'struct acrn_io_request', that is filled by
>> +an I/O handler of the hypervisor when a trapped I/O access happens in a User
>> +VM. ACRN userspace in the Service VM first allocates a 4-KByte page and passes
>> +the GPA (Guest Physical Address) of the buffer to the hypervisor. The buffer is
>> +used as an array of 16 I/O request slots with each I/O request slot being 256
>> +bytes. This array is indexed by vCPU ID.
>
>Does this mean that ACRN has a limit of 16 vCPUs ?
Yes. Now it is a limitation.
Thanks
shuo
next prev parent reply other threads:[~2021-02-09 1:25 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-07 3:10 [PATCH v9 00/18] HSM driver for ACRN hypervisor shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 01/18] docs: acrn: Introduce ACRN shuo.a.liu
2021-02-08 19:48 ` Randy Dunlap
2021-02-09 1:24 ` Shuo A Liu [this message]
2021-02-07 3:10 ` [PATCH v9 02/18] x86/acrn: Introduce acrn_{setup, remove}_intr_handler() shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 03/18] x86/acrn: Introduce acrn_cpuid_base() and hypervisor feature bits shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 04/18] x86/acrn: Introduce hypercall interfaces shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 05/18] virt: acrn: Introduce ACRN HSM basic driver shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 06/18] virt: acrn: Introduce VM management interfaces shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 07/18] virt: acrn: Introduce an ioctl to set vCPU registers state shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 08/18] virt: acrn: Introduce EPT mapping management shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 09/18] virt: acrn: Introduce I/O request management shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 10/18] virt: acrn: Introduce PCI configuration space PIO accesses combiner shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 11/18] virt: acrn: Introduce interfaces for PCI device passthrough shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 12/18] virt: acrn: Introduce interrupt injection interfaces shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 13/18] virt: acrn: Introduce interfaces to query C-states and P-states allowed by hypervisor shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 14/18] virt: acrn: Introduce I/O ranges operation interfaces shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 15/18] virt: acrn: Introduce ioeventfd shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 16/18] virt: acrn: Introduce irqfd shuo.a.liu
2021-02-07 3:10 ` [PATCH v9 17/18] virt: acrn: Introduce an interface for Service VM to control vCPU shuo.a.liu
2021-03-03 17:37 ` Borislav Petkov
2021-03-04 1:36 ` Shuo A Liu
2021-03-04 10:50 ` Borislav Petkov
2021-02-07 3:10 ` [PATCH v9 18/18] sample/acrn: Introduce a sample of HSM ioctl interface usage shuo.a.liu
2021-02-09 10:00 ` [PATCH v9 00/18] HSM driver for ACRN hypervisor Greg Kroah-Hartman
2021-02-09 10:18 ` Shuo A Liu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210209012407.GC15601@shuo-intel.sh.intel.com \
--to=shuo.a.liu@intel.com \
--cc=bp@alien8.de \
--cc=bp@suse.de \
--cc=dan.j.williams@intel.com \
--cc=dave.hansen@intel.com \
--cc=fengwei.yin@intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=rdunlap@infradead.org \
--cc=reinette.chatre@intel.com \
--cc=sean.j.christopherson@intel.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
--cc=yu1.wang@intel.com \
--cc=zhenyuw@linux.intel.com \
--cc=zhi.a.wang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.