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doc: add RTC emulation in hypervisor doc

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add RTC emulation in hypervisor doc and add entry in hld-emulated-devices

Signed-off-by: Gao Junhao <junhao.gao@intel.com>
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Gao Junhao 2019-10-23 02:31:14 +00:00 committed by wenlingz
parent b5491474d8
commit 2e2c3db5c3
2 changed files with 10 additions and 0 deletions
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doc/developer-guides/hld/hld-emulated-devices.rst
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@ -17,3 +17,4 @@ documented in this section.
AHCI virtualization <ahci-hld>
GVT-g GPU Virtualization <hld-APL_GVT-g>
UART emulation in hypervisor <vuart-virt-hld>
RTC emulation in hypervisor <rtc-virt-hld>

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doc/developer-guides/hld/rtc-virt-hld.rst Normal file
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@ -0,0 +1,9 @@
.. _rtc-virt-hld:
RTC Virtualization
##################
This document describes the RTC virtualization implementation in
ACRN device model.
vRTC is a read-only RTC for For pre-launched VM, Service OS and post-launched RT VM. It supports RW for CMOS address port 0x70 and RO for CMOS data port 0x71. Reads to CMOS RAM offsets are fetched by reading CMOS h/w directly and writes to CMOS offsets are discarded.