diff options
author | Avi Kivity <avi@redhat.com> | 2010-04-29 05:08:56 -0400 |
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committer | Avi Kivity <avi@redhat.com> | 2010-08-01 03:35:40 -0400 |
commit | 47dbb84f9e04e3261585da384d96b8c63f3376e3 (patch) | |
tree | c9373e8c202e7d3365e0708170d489b95626b060 | |
parent | 54a4f0239f2e98bc0842818f611a4cf73bb7dd35 (diff) |
KVM: Document KVM_SET_IDENTITY_MAP ioctl
Signed-off-by: Avi Kivity <avi@redhat.com>
-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. | |||
892 | This ioctl is only useful after KVM_CREATE_IRQCHIP. Without an in-kernel | 892 | This ioctl is only useful after KVM_CREATE_IRQCHIP. Without an in-kernel |
893 | irqchip, the multiprocessing state must be maintained by userspace. | 893 | irqchip, the multiprocessing state must be maintained by userspace. |
894 | 894 | ||
895 | 4.39 KVM_SET_IDENTITY_MAP_ADDR | ||
896 | |||
897 | Capability: KVM_CAP_SET_IDENTITY_MAP_ADDR | ||
898 | Architectures: x86 | ||
899 | Type: vm ioctl | ||
900 | Parameters: unsigned long identity (in) | ||
901 | Returns: 0 on success, -1 on error | ||
902 | |||
903 | This ioctl defines the physical address of a one-page region in the guest | ||
904 | physical address space. The region must be within the first 4GB of the | ||
905 | guest physical address space and must not conflict with any memory slot | ||
906 | or any mmio address. The guest may malfunction if it accesses this memory | ||
907 | region. | ||
908 | |||
909 | This ioctl is required on Intel-based hosts. This is needed on Intel hardware | ||
910 | because of a quirk in the virtualization implementation (see the internals | ||
911 | documentation when it pops into existence). | ||
912 | |||
895 | 5. The kvm_run structure | 913 | 5. The kvm_run structure |
896 | 914 | ||
897 | Application code obtains a pointer to the kvm_run structure by | 915 | Application code obtains a pointer to the kvm_run structure by |