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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2010-02-15 12:45:43 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-04-25 13:39:10 +0400 |
| commit | a1efbe77c1fd7c34a97a76a61520bf23fb3663f6 (patch) | |
| tree | d2e42935b12867d1b0dcd9c78bb06f76c0c71078 /Documentation/kvm | |
| parent | 48005f64d0ea965d454e38b5181af4aba9bdef5b (diff) | |
| download | linux-a1efbe77c1fd7c34a97a76a61520bf23fb3663f6.tar.xz | |
KVM: x86: Add support for saving&restoring debug registers
So far user space was not able to save and restore debug registers for
migration or after reset. Plug this hole.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'Documentation/kvm')
| -rw-r--r-- | Documentation/kvm/api.txt | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/kvm/api.txt b/Documentation/kvm/api.txt index 9e5de5a1c4ef..d170cb435545 100644 --- a/Documentation/kvm/api.txt +++ b/Documentation/kvm/api.txt @@ -718,6 +718,37 @@ If KVM_CAP_INTR_SHADOW is available, KVM_VCPUEVENT_VALID_SHADOW can be set in the flags field to signal that interrupt.shadow contains a valid state and shall be written into the VCPU. +4.32 KVM_GET_DEBUGREGS + +Capability: KVM_CAP_DEBUGREGS +Architectures: x86 +Type: vm ioctl +Parameters: struct kvm_debugregs (out) +Returns: 0 on success, -1 on error + +Reads debug registers from the vcpu. + +struct kvm_debugregs { + __u64 db[4]; + __u64 dr6; + __u64 dr7; + __u64 flags; + __u64 reserved[9]; +}; + +4.33 KVM_SET_DEBUGREGS + +Capability: KVM_CAP_DEBUGREGS +Architectures: x86 +Type: vm ioctl +Parameters: struct kvm_debugregs (in) +Returns: 0 on success, -1 on error + +Writes debug registers into the vcpu. + +See KVM_GET_DEBUGREGS for the data structure. The flags field is unused +yet and must be cleared on entry. + 5. The kvm_run structure |