From: Randy Dunlap <rdunlap@infradead.org>
To: shuo.a.liu@intel.com, linux-kernel@vger.kernel.org, x86@kernel.org
Cc: 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: Mon, 8 Feb 2021 11:48:07 -0800 [thread overview]
Message-ID: <6ae2679c-e172-a955-9df5-2b54b79dd854@infradead.org> (raw)
In-Reply-To: <20210207031040.49576-2-shuo.a.liu@intel.com>
Hi--
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 ?
thanks.
--
~Randy
next prev parent reply other threads:[~2021-02-08 20:59 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 [this message]
2021-02-09 1:24 ` Shuo A Liu
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
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