diff options
| author | Liran Alon <liran.alon@oracle.com> | 2019-06-19 19:21:38 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-06-21 13:23:47 +0200 |
| commit | ebbfef2f34cfc749c045a4569dedb4f748ec024a (patch) | |
| tree | cc5e7b2744e8878a8fac08dd91f5b58820bdcf50 /accel | |
| parent | 6cfd7639329062797c04ec79adb1023a8ba2fcb4 (diff) | |
target/i386: kvm: Add support for save and restore nested state
Kernel commit 8fcc4b5923af ("kvm: nVMX: Introduce KVM_CAP_NESTED_STATE")
introduced new IOCTLs to extract and restore vCPU state related to
Intel VMX & AMD SVM.
Utilize these IOCTLs to add support for migration of VMs which are
running nested hypervisors.
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: Maran Wilson <maran.wilson@oracle.com>
Tested-by: Maran Wilson <maran.wilson@oracle.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Message-Id: <20190619162140.133674-9-liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'accel')
| -rw-r--r-- | accel/kvm/kvm-all.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index f0f5ab833b..e3cf72883b 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -87,6 +87,7 @@ struct KVMState #ifdef KVM_CAP_SET_GUEST_DEBUG QTAILQ_HEAD(, kvm_sw_breakpoint) kvm_sw_breakpoints; #endif + int max_nested_state_len; int many_ioeventfds; int intx_set_mask; bool sync_mmu; @@ -1681,6 +1682,8 @@ static int kvm_init(MachineState *ms) s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); #endif + s->max_nested_state_len = kvm_check_extension(s, KVM_CAP_NESTED_STATE); + #ifdef KVM_CAP_IRQ_ROUTING kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); #endif @@ -2248,6 +2251,11 @@ int kvm_has_debugregs(void) return kvm_state->debugregs; } +int kvm_max_nested_state_length(void) +{ + return kvm_state->max_nested_state_len; +} + int kvm_has_many_ioeventfds(void) { if (!kvm_enabled()) { |