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| author | Avi Kivity <avi@redhat.com> | 2010-04-29 12:08:56 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-08-01 10:35:40 +0300 |
| commit | 47dbb84f9e04e3261585da384d96b8c63f3376e3 (patch) | |
| tree | c9373e8c202e7d3365e0708170d489b95626b060 /Documentation/kvm/api.txt | |
| parent | 54a4f0239f2e98bc0842818f611a4cf73bb7dd35 (diff) | |
| download | lwn-47dbb84f9e04e3261585da384d96b8c63f3376e3.tar.gz lwn-47dbb84f9e04e3261585da384d96b8c63f3376e3.zip | |
KVM: Document KVM_SET_IDENTITY_MAP ioctl
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'Documentation/kvm/api.txt')
| -rw-r--r-- | Documentation/kvm/api.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/kvm/api.txt b/Documentation/kvm/api.txt index a237518e51b9..0f96e5223475 100644 --- a/Documentation/kvm/api.txt +++ b/Documentation/kvm/api.txt @@ -892,6 +892,24 @@ arguments. This ioctl is only useful after KVM_CREATE_IRQCHIP. Without an in-kernel irqchip, the multiprocessing state must be maintained by userspace. +4.39 KVM_SET_IDENTITY_MAP_ADDR + +Capability: KVM_CAP_SET_IDENTITY_MAP_ADDR +Architectures: x86 +Type: vm ioctl +Parameters: unsigned long identity (in) +Returns: 0 on success, -1 on error + +This ioctl defines the physical address of a one-page region in the guest +physical address space. The region must be within the first 4GB of the +guest physical address space and must not conflict with any memory slot +or any mmio address. The guest may malfunction if it accesses this memory +region. + +This ioctl is required on Intel-based hosts. This is needed on Intel hardware +because of a quirk in the virtualization implementation (see the internals +documentation when it pops into existence). + 5. The kvm_run structure Application code obtains a pointer to the kvm_run structure by |