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| author | Abel Gordon <abelg@il.ibm.com> | 2013-04-18 14:38:55 +0300 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-04-22 10:52:37 +0300 |
| commit | c3114420d1c7a6075fb0cfdc69b567423e5cfc13 (patch) | |
| tree | d5f4ac4aaba18fabccdd0d1e240d0f767e1f707b /arch/x86/kvm/vmx.c | |
| parent | 16f5b9034b699dea2f8862c324a0fd3275b4a50f (diff) | |
| download | lwn-c3114420d1c7a6075fb0cfdc69b567423e5cfc13.tar.gz lwn-c3114420d1c7a6075fb0cfdc69b567423e5cfc13.zip | |
KVM: nVMX: Copy VMCS12 to processor-specific shadow vmcs
Introduce a function used to copy fields from the software controlled VMCS12
to the processor-specific shadow vmcs
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 | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 628d012112f5..8dc59aaab3db 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_vmcs12_to_shadow(struct vcpu_vmx *vmx); static void copy_shadow_to_vmcs12(struct vcpu_vmx *vmx); static DEFINE_PER_CPU(struct vmcs *, vmxarea); @@ -5930,6 +5931,50 @@ static void copy_shadow_to_vmcs12(struct vcpu_vmx *vmx) vmcs_load(vmx->loaded_vmcs->vmcs); } +static void copy_vmcs12_to_shadow(struct vcpu_vmx *vmx) +{ + unsigned long *fields[] = { + (unsigned long *)shadow_read_write_fields, + (unsigned long *)shadow_read_only_fields + }; + int num_lists = ARRAY_SIZE(fields); + int max_fields[] = { + max_shadow_read_write_fields, + max_shadow_read_only_fields + }; + int i, q; + unsigned long field; + u64 field_value = 0; + struct vmcs *shadow_vmcs = vmx->nested.current_shadow_vmcs; + + vmcs_load(shadow_vmcs); + + for (q = 0; q < num_lists; q++) { + for (i = 0; i < max_fields[q]; i++) { + field = fields[q][i]; + vmcs12_read_any(&vmx->vcpu, field, &field_value); + + switch (vmcs_field_type(field)) { + case VMCS_FIELD_TYPE_U16: + vmcs_write16(field, (u16)field_value); + break; + case VMCS_FIELD_TYPE_U32: + vmcs_write32(field, (u32)field_value); + break; + case VMCS_FIELD_TYPE_U64: + vmcs_write64(field, (u64)field_value); + break; + case VMCS_FIELD_TYPE_NATURAL_WIDTH: + vmcs_writel(field, (long)field_value); + break; + } + } + } + + 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. |