| Jan Kiszka | 38a778a | 2011-02-09 15:11:28 +0100 | [diff] [blame] | 1 | KVM Lock Overview |
| 2 | ================= |
| 3 | |
| 4 | 1. Acquisition Orders |
| 5 | --------------------- |
| 6 | |
| 7 | (to be written) |
| 8 | |
| 9 | 2. Reference |
| 10 | ------------ |
| 11 | |
| 12 | Name: kvm_lock |
| 13 | Type: raw_spinlock |
| 14 | Arch: any |
| 15 | Protects: - vm_list |
| 16 | - hardware virtualization enable/disable |
| 17 | Comment: 'raw' because hardware enabling/disabling must be atomic /wrt |
| 18 | migration. |
| 19 | |
| 20 | Name: kvm_arch::tsc_write_lock |
| 21 | Type: raw_spinlock |
| 22 | Arch: x86 |
| 23 | Protects: - kvm_arch::{last_tsc_write,last_tsc_nsec,last_tsc_offset} |
| 24 | - tsc offset in vmcb |
| 25 | Comment: 'raw' because updating the tsc offsets must not be preempted. |