diff options
| author | Abel Gordon <abelg@il.ibm.com> | 2013-04-18 14:38:25 +0300 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-04-22 10:52:24 +0300 |
| commit | 16f5b9034b699dea2f8862c324a0fd3275b4a50f (patch) | |
| tree | cb9a19c3fd4523ec5f4dbfb08c8bc72d8db3454a /arch/x86/kvm/vmx.c | |
| parent | e7953d7fab47a72e0d82e5d4dbb022864d8c2a41 (diff) | |
KVM: nVMX: Copy processor-specific shadow-vmcs to VMCS12
Introduce a function used to copy fields from the processor-specific shadow
vmcs to the software controlled VMCS12
Signed-off-by: Abel Gordon <abelg@il.ibm.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index ad3957e5f2e8..628d012112f5 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -718,6 +718,7 @@ static void vmx_get_segment(struct kvm_vcpu *vcpu, static bool guest_state_valid(struct kvm_vcpu *vcpu); static u32 vmx_segment_access_rights(struct kvm_segment *var); static void vmx_sync_pir_to_irr_dummy(struct kvm_vcpu *vcpu); +static void copy_shadow_to_vmcs12(struct vcpu_vmx *vmx); static DEFINE_PER_CPU(struct vmcs *, vmxarea); static DEFINE_PER_CPU(struct vmcs *, current_vmcs); @@ -5895,6 +5896,40 @@ static inline bool vmcs12_write_any(struct kvm_vcpu *vcpu, } +static void copy_shadow_to_vmcs12(struct vcpu_vmx *vmx) +{ + int i; + unsigned long field; + u64 field_value; + struct vmcs *shadow_vmcs = vmx->nested.current_shadow_vmcs; + unsigned long *fields = (unsigned long *)shadow_read_write_fields; + int num_fields = max_shadow_read_write_fields; + + vmcs_load(shadow_vmcs); + + for (i = 0; i < num_fields; i++) { + field = fields[i]; + switch (vmcs_field_type(field)) { + case VMCS_FIELD_TYPE_U16: + field_value = vmcs_read16(field); + break; + case VMCS_FIELD_TYPE_U32: + field_value = vmcs_read32(field); + break; + case VMCS_FIELD_TYPE_U64: + field_value = vmcs_read64(field); + break; + case VMCS_FIELD_TYPE_NATURAL_WIDTH: + field_value = vmcs_readl(field); + break; + } + vmcs12_write_any(&vmx->vcpu, field, field_value); + } + + vmcs_clear(shadow_vmcs); + vmcs_load(vmx->loaded_vmcs->vmcs); +} + /* * VMX instructions which assume a current vmcs12 (i.e., that VMPTRLD was * used before) all generate the same failure when it is missing. |