diff options
Diffstat (limited to 'Documentation/virt/kvm/locking.rst')
| -rw-r--r-- | Documentation/virt/kvm/locking.rst | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/Documentation/virt/kvm/locking.rst b/Documentation/virt/kvm/locking.rst index 5d27da356836..6c9aa4f49608 100644 --- a/Documentation/virt/kvm/locking.rst +++ b/Documentation/virt/kvm/locking.rst @@ -210,32 +210,41 @@ time it will be set using the Dirty tracking mechanism described above. 3. Reference ------------ -:Name: kvm_lock +``kvm_lock`` +^^^^^^^^^^^^ + :Type: mutex :Arch: any :Protects: - vm_list -:Name: kvm_count_lock +``kvm_count_lock`` +^^^^^^^^^^^^^^^^^^ + :Type: raw_spinlock_t :Arch: any :Protects: - hardware virtualization enable/disable :Comment: 'raw' because hardware enabling/disabling must be atomic /wrt migration. -:Name: kvm_arch::tsc_write_lock -:Type: raw_spinlock + +``kvm_arch::tsc_write_lock`` +^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +:Type: raw_spinlock_t :Arch: x86 :Protects: - kvm_arch::{last_tsc_write,last_tsc_nsec,last_tsc_offset} - tsc offset in vmcb :Comment: 'raw' because updating the tsc offsets must not be preempted. -:Name: kvm->mmu_lock -:Type: spinlock_t +``kvm->mmu_lock`` +^^^^^^^^^^^^^^^^^ +:Type: spinlock_t or rwlock_t :Arch: any :Protects: -shadow page/shadow tlb entry :Comment: it is a spinlock since it is used in mmu notifier. -:Name: kvm->srcu +``kvm->srcu`` +^^^^^^^^^^^^^ :Type: srcu lock :Arch: any :Protects: - kvm->memslots @@ -246,10 +255,11 @@ time it will be set using the Dirty tracking mechanism described above. The srcu index can be stored in kvm_vcpu->srcu_idx per vcpu if it is needed by multiple functions. -:Name: blocked_vcpu_on_cpu_lock +``wakeup_vcpus_on_cpu_lock`` +^^^^^^^^^^^^^^^^^^^^^^^^^^^^ :Type: spinlock_t :Arch: x86 -:Protects: blocked_vcpu_on_cpu +:Protects: wakeup_vcpus_on_cpu :Comment: This is a per-CPU lock and it is used for VT-d posted-interrupts. When VT-d posted-interrupts is supported and the VM has assigned devices, we put the blocked vCPU on the list blocked_vcpu_on_cpu |