| commit | 034d862fb810309041effe81dde6aeb0843db683 | [log] [tgz] |
|---|---|---|
| author | Alex Legg <alexlegg@google.com> | Wed Mar 14 17:25:26 2018 +1100 |
| committer | CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> | Thu Mar 15 01:54:08 2018 +0000 |
| tree | ba57a2ce45d1dcd889fff6233b0c85e8e1322bce | |
| parent | 3216b13b55ce8065e57a3cd1dfd990bb3042e910 [diff] |
[x86][hypervisor] Reinstate EPT invalidation We used to invalidate EPT caches when launching a guest due to the use of APIC addresses, which was removed when we moved to X2APIC. However, we still need to invalidate the cache to cover the case where a guest is destroyed immediately before a new guest with the same EPTP is started. This was occurring randomly when running hypervisor-test in a loop and causing triple faults. PD-73 #done Change-Id: Id250f52d7e3023daafcba78b0966667b5f9c78ad
Zircon is the core platform that powers the Fuchsia OS. Zircon is composed of a microkernel (source in kernel/...) as well as a small set of userspace services, drivers, and libraries (source in system/...) necessary for the system to boot, talk to hardware, load userspace processes and run them, etc. Fuchsia builds a much larger OS on top of this foundation.
The canonical Zircon Git repository is located at: https://fuchsia.googlesource.com/zircon
A read-only mirror of the code is present at: https://github.com/fuchsia-mirror/zircon
The Zircon Kernel provides syscalls to manage processes, threads, virtual memory, inter-process communication, waiting on object state changes, and locking (via futexes).
Currently there are some temporary syscalls that have been used for early bringup work, which will be going away in the future as the long term syscall API/ABI surface is finalized. The expectation is that there will be about 100 syscalls.
Zircon syscalls are generally non-blocking. The wait_one, wait_many port_wait and thread sleep being the notable exceptions.
This page is a non-comprehensive index of the zircon documentation.