mdbook: Add portal to edit page

Add `repository-url` and `edit-utl` template to guide readers.

Signed-off-by: Ruoqing He <heruoqing@iscas.ac.cn>

Author: RuoqingHe

book.toml

@@ -4,3 +4,8 @@ language = "en"
 multilingual = false
 src = "src"
 title = "Track of TimePrinciple"
+
+[output.html]
+git-repository-url = "https://github.com/TimePrinciple/timeprinciple.github.io"
+git-repository-icon = "fa-github"
+edit-url-template = "https://github.com/TimePrinciple/timeprinciple.github.io/edit/main/{path}"

src/research/pvm/requirements.md

@@ -0,0 +1,14 @@
+# PVM Background
+
+In cloud-native environments, containers are often deployed within lightweight
+virtual machines (Light-VMs) to ensure strong security isolation and privacy
+protection. With the growing demand for customized cloud services, third-party
+vendors are turning to infrastructure-as-a-service (IaaS) cloud providers to
+build their own cloud-native platforms, necessitating the need to run a VM or a
+guest that hosts containers inside another VM instance leased from an IaaS
+cloud. State-of-the-art nested virtualization in the x86 architecture relies
+heavily on the host hypervisor to expose hardware virtualization support to the
+guest hypervisor, not only complicating cloud management but also raising
+concerns about an increased attack surface at the host hypervisor.
+
+