diff options
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 95c05581a06f..722026c9d478 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -242,7 +242,11 @@ struct shared_msr_entry { * underlying hardware which will be used to run L2. * This structure is packed to ensure that its layout is identical across * machines (necessary for live migration). - * If there are changes in this struct, VMCS12_REVISION must be changed. + * + * IMPORTANT: Changing the layout of existing fields in this structure + * will break save/restore compatibility with older kvm releases. When + * adding new fields, either use space in the reserved padding* arrays + * or add the new fields to the end of the structure. */ typedef u64 natural_width; struct __packed vmcs12 { @@ -265,17 +269,14 @@ struct __packed vmcs12 { u64 virtual_apic_page_addr; u64 apic_access_addr; u64 posted_intr_desc_addr; - u64 vm_function_control; u64 ept_pointer; u64 eoi_exit_bitmap0; u64 eoi_exit_bitmap1; u64 eoi_exit_bitmap2; u64 eoi_exit_bitmap3; - u64 eptp_list_address; u64 xss_exit_bitmap; u64 guest_physical_address; u64 vmcs_link_pointer; - u64 pml_address; u64 guest_ia32_debugctl; u64 guest_ia32_pat; u64 guest_ia32_efer; @@ -288,7 +289,12 @@ struct __packed vmcs12 { u64 host_ia32_pat; u64 host_ia32_efer; u64 host_ia32_perf_global_ctrl; - u64 padding64[8]; /* room for future expansion */ + u64 vmread_bitmap; + u64 vmwrite_bitmap; + u64 vm_function_control; + u64 eptp_list_address; + u64 pml_address; + u64 padding64[3]; /* room for future expansion */ /* * To allow migration of L1 (complete with its L2 guests) between * machines of different natural widths (32 or 64 bit), we cannot have @@ -397,7 +403,6 @@ struct __packed vmcs12 { u16 guest_ldtr_selector; u16 guest_tr_selector; u16 guest_intr_status; - u16 guest_pml_index; u16 host_es_selector; u16 host_cs_selector; u16 host_ss_selector; @@ -405,12 +410,16 @@ struct __packed vmcs12 { u16 host_fs_selector; u16 host_gs_selector; u16 host_tr_selector; + u16 guest_pml_index; }; /* * VMCS12_REVISION is an arbitrary id that should be changed if the content or * layout of struct vmcs12 is changed. MSR_IA32_VMX_BASIC returns this id, and * VMPTRLD verifies that the VMCS region that L1 is loading contains this id. + * + * IMPORTANT: Changing this value will break save/restore compatibility with + * older kvm releases. */ #define VMCS12_REVISION 0x11e57ed0 @@ -762,6 +771,7 @@ static const unsigned short vmcs_field_to_offset_table[] = { FIELD64(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr), FIELD64(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr), FIELD64(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr), + FIELD64(PML_ADDRESS, pml_address), FIELD64(TSC_OFFSET, tsc_offset), FIELD64(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr), FIELD64(APIC_ACCESS_ADDR, apic_access_addr), @@ -773,10 +783,11 @@ static const unsigned short vmcs_field_to_offset_table[] = { FIELD64(EOI_EXIT_BITMAP2, eoi_exit_bitmap2), FIELD64(EOI_EXIT_BITMAP3, eoi_exit_bitmap3), FIELD64(EPTP_LIST_ADDRESS, eptp_list_address), + FIELD64(VMREAD_BITMAP, vmread_bitmap), + FIELD64(VMWRITE_BITMAP, vmwrite_bitmap), FIELD64(XSS_EXIT_BITMAP, xss_exit_bitmap), FIELD64(GUEST_PHYSICAL_ADDRESS, guest_physical_address), FIELD64(VMCS_LINK_POINTER, vmcs_link_pointer), - FIELD64(PML_ADDRESS, pml_address), FIELD64(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl), FIELD64(GUEST_IA32_PAT, guest_ia32_pat), FIELD64(GUEST_IA32_EFER, guest_ia32_efer), |