summaryrefslogtreecommitdiff
path: root/Documentation
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-18 04:40:35 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-18 04:40:35 +0300
commitec0afc9311adcfb10b90e547c23250f63939f990 (patch)
tree2093d2668898a8a03f30acbfd5568e65b8c086b9 /Documentation
parent804f18536984939622ddca60ab6b25743e0ec68d (diff)
parent776e58ea3d3735f85678155398241d2513afa67a (diff)
downloadlinux-ec0afc9311adcfb10b90e547c23250f63939f990.tar.xz
Merge branch 'kvm-updates/2.6.39' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/2.6.39' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (55 commits) KVM: unbreak userspace that does not sets tss address KVM: MMU: cleanup pte write path KVM: MMU: introduce a common function to get no-dirty-logged slot KVM: fix rcu usage in init_rmode_* functions KVM: fix kvmclock regression due to missing clock update KVM: emulator: Fix permission checking in io permission bitmap KVM: emulator: Fix io permission checking for 64bit guest KVM: SVM: Load %gs earlier if CONFIG_X86_32_LAZY_GS=n KVM: x86: Remove useless regs_page pointer from kvm_lapic KVM: improve comment on rcu use in irqfd_deassign KVM: MMU: remove unused macros KVM: MMU: cleanup page alloc and free KVM: MMU: do not record gfn in kvm_mmu_pte_write KVM: MMU: move mmu pages calculated out of mmu lock KVM: MMU: set spte accessed bit properly KVM: MMU: fix kvm_mmu_slot_remove_write_access dropping intermediate W bits KVM: Start lock documentation KVM: better readability of efer_reserved_bits KVM: Clear async page fault hash after switching to real mode KVM: VMX: Initialize vm86 TSS only once. ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kvm/locking.txt25
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/kvm/locking.txt b/Documentation/kvm/locking.txt
new file mode 100644
index 000000000000..3b4cd3bf5631
--- /dev/null
+++ b/Documentation/kvm/locking.txt
@@ -0,0 +1,25 @@
+KVM Lock Overview
+=================
+
+1. Acquisition Orders
+---------------------
+
+(to be written)
+
+2. Reference
+------------
+
+Name: kvm_lock
+Type: raw_spinlock
+Arch: any
+Protects: - vm_list
+ - hardware virtualization enable/disable
+Comment: 'raw' because hardware enabling/disabling must be atomic /wrt
+ migration.
+
+Name: kvm_arch::tsc_write_lock
+Type: raw_spinlock
+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.