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KVM: Restore missing powerpc API docs

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Commit 371fefd6 lost a doc hunk somehow, restore it.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2011-08-29 16:27:08 +03:00
parent 58fbbf26eb
commit 364426871c
1 changed files with 13 additions and 0 deletions
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13
Documentation/virtual/kvm/api.txt
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@ -200,6 +200,19 @@ allocation of vcpu ids. For example, if userspace wants
single-threaded guest vcpus, it should make all vcpu ids be a multiple
of the number of vcpus per vcore.
On powerpc using book3s_hv mode, the vcpus are mapped onto virtual
threads in one or more virtual CPU cores. (This is because the
hardware requires all the hardware threads in a CPU core to be in the
same partition.) The KVM_CAP_PPC_SMT capability indicates the number
of vcpus per virtual core (vcore). The vcore id is obtained by
dividing the vcpu id by the number of vcpus per vcore. The vcpus in a
given vcore will always be in the same physical core as each other
(though that might be a different physical core from time to time).
Userspace can control the threading (SMT) mode of the guest by its
allocation of vcpu ids. For example, if userspace wants
single-threaded guest vcpus, it should make all vcpu ids be a multiple
of the number of vcpus per vcore.
4.8 KVM_GET_DIRTY_LOG (vm ioctl)
Capability: basic