Merge branch 'opensbi-v0.9' into v0.2

RELEASE_NOTES.md

@@ -0,0 +1,26 @@
+## Release notes
+
+
+---
+v0.2 (2021/12/26)
+
+This release contains the following improvements compared with prior one:
+
+- Attestation supported
+- Add user-defined ocalls to allow host implements more functionalities for enclaves
+- Supported shared untrusted memory
+- Other imrpvoements, e.g., reading the SM_BASE/SM_SIZE from opensbi's linker symbols, enabling float in the monitor
+
+This release also supports more devices, e.g., Nuclei NX600, Starfive Starlight boards, as well as more  applications, e.g., a tensorflow demo.
+
+This release is supposed to be the last release using OpenSBI v0.9, and we will go forward to OpenSBI v1.0 in the next release.
+
+Many thanks to everyone who has contributed to this release.
+
+
+---
+v0.1 (2021/7/15)
+
+This is the first release of Penglai-PMP (the isolation mechanism is PMP or sPMP) implementing v2 of the Penglai SBI extension API.
+The release contains basic TEE functionalities on RISC-V, including enclave create, run, resume, stop, destroy.
+This release focuses on 64bit RISC-V systems (32bit not tested in this version).