From: Orit Wasserman <[email protected]>
---
arch/x86/kvm/vmx.c | 533 +++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 523 insertions(+), 10 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 2b1fc3b..5ab07a0 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -61,6 +61,151 @@ module_param_named(unrestricted_guest,
static int __read_mostly emulate_invalid_guest_state = 0;
module_param(emulate_invalid_guest_state, bool, S_IRUGO);
+struct __attribute__ ((__packed__)) shadow_vmcs {
+ uint16_t virtual_processor_id;
+ uint16_t guest_es_selector;
+ uint16_t guest_cs_selector;
+ uint16_t guest_ss_selector;
+ uint16_t guest_ds_selector;
+ uint16_t guest_fs_selector;
+ uint16_t guest_gs_selector;
+ uint16_t guest_ldtr_selector;
+ uint16_t guest_tr_selector;
+ uint16_t host_es_selector;
+ uint16_t host_cs_selector;
+ uint16_t host_ss_selector;
+ uint16_t host_ds_selector;
+ uint16_t host_fs_selector;
+ uint16_t host_gs_selector;
+ uint16_t host_tr_selector;
+ uint64_t io_bitmap_a;
+ uint64_t io_bitmap_b;
+ uint64_t msr_bitmap;
+ uint64_t vm_exit_msr_store_addr;
+ uint64_t vm_exit_msr_load_addr;
+ uint64_t vm_entry_msr_load_addr;
+ uint64_t tsc_offset;
+ uint64_t virtual_apic_page_addr;
+ uint64_t apic_access_addr;
+ uint64_t ept_pointer;
+ uint64_t guest_physical_address;
+ uint64_t vmcs_link_pointer;
+ uint64_t guest_ia32_debugctl;
+ uint64_t guest_ia32_pat;
+ uint64_t guest_pdptr0;
+ uint64_t guest_pdptr1;
+ uint64_t guest_pdptr2;
+ uint64_t guest_pdptr3;
+ uint64_t host_ia32_pat;
+ uint32_t pin_based_vm_exec_control;
+ uint32_t cpu_based_vm_exec_control;
+ uint32_t exception_bitmap;
+ uint32_t page_fault_error_code_mask;
+ uint32_t page_fault_error_code_match;
+ uint32_t cr3_target_count;
+ uint32_t vm_exit_controls;
+ uint32_t vm_exit_msr_store_count;
+ uint32_t vm_exit_msr_load_count;
+ uint32_t vm_entry_controls;
+ uint32_t vm_entry_msr_load_count;
+ uint32_t vm_entry_intr_info_field;
+ uint32_t vm_entry_exception_error_code;
+ uint32_t vm_entry_instruction_len;
+ uint32_t tpr_threshold;
+ uint32_t secondary_vm_exec_control;
+ uint32_t vm_instruction_error;
+ uint32_t vm_exit_reason;
+ uint32_t vm_exit_intr_info;
+ uint32_t vm_exit_intr_error_code;
+ uint32_t idt_vectoring_info_field;
+ uint32_t idt_vectoring_error_code;
+ uint32_t vm_exit_instruction_len;
+ uint32_t vmx_instruction_info;
+ uint32_t guest_es_limit;
+ uint32_t guest_cs_limit;
+ uint32_t guest_ss_limit;
+ uint32_t guest_ds_limit;
+ uint32_t guest_fs_limit;
+ uint32_t guest_gs_limit;
+ uint32_t guest_ldtr_limit;
+ uint32_t guest_tr_limit;
+ uint32_t guest_gdtr_limit;
+ uint32_t guest_idtr_limit;
+ uint32_t guest_es_ar_bytes;
+ uint32_t guest_cs_ar_bytes;
+ uint32_t guest_ss_ar_bytes;
+ uint32_t guest_ds_ar_bytes;
+ uint32_t guest_fs_ar_bytes;
+ uint32_t guest_gs_ar_bytes;
+ uint32_t guest_ldtr_ar_bytes;
+ uint32_t guest_tr_ar_bytes;
+ uint32_t guest_interruptibility_info;
+ uint32_t guest_activity_state;
+ uint32_t guest_sysenter_cs;
+ uint32_t host_ia32_sysenter_cs;
+ unsigned long cr0_guest_host_mask;
+ unsigned long cr4_guest_host_mask;
+ unsigned long cr0_read_shadow;
+ unsigned long cr4_read_shadow;
+ unsigned long cr3_target_value0;
+ unsigned long cr3_target_value1;
+ unsigned long cr3_target_value2;
+ unsigned long cr3_target_value3;
+ unsigned long exit_qualification;
+ unsigned long guest_linear_address;
+ unsigned long guest_cr0;
+ unsigned long guest_cr3;
+ unsigned long guest_cr4;
+ unsigned long guest_es_base;
+ unsigned long guest_cs_base;
+ unsigned long guest_ss_base;
+ unsigned long guest_ds_base;
+ unsigned long guest_fs_base;
+ unsigned long guest_gs_base;
+ unsigned long guest_ldtr_base;
+ unsigned long guest_tr_base;
+ unsigned long guest_gdtr_base;
+ unsigned long guest_idtr_base;
+ unsigned long guest_dr7;
+ unsigned long guest_rsp;
+ unsigned long guest_rip;
+ unsigned long guest_rflags;
+ unsigned long guest_pending_dbg_exceptions;
+ unsigned long guest_sysenter_esp;
+ unsigned long guest_sysenter_eip;
+ unsigned long host_cr0;
+ unsigned long host_cr3;
+ unsigned long host_cr4;
+ unsigned long host_fs_base;
+ unsigned long host_gs_base;
+ unsigned long host_tr_base;
+ unsigned long host_gdtr_base;
+ unsigned long host_idtr_base;
+ unsigned long host_ia32_sysenter_esp;
+ unsigned long host_ia32_sysenter_eip;
+ unsigned long host_rsp;
+ unsigned long host_rip;
+};
+
+struct __attribute__ ((__packed__)) level_state {
+ struct shadow_vmcs *shadow_vmcs;
+
+ u16 vpid;
+ u64 shadow_efer;
+ unsigned long cr2;
+ unsigned long cr3;
+ unsigned long cr4;
+ unsigned long cr8;
+
+ u64 io_bitmap_a;
+ u64 io_bitmap_b;
+ u64 msr_bitmap;
+
+ struct vmcs *vmcs;
+ int cpu;
+ int launched;
+};
+
struct vmcs {
u32 revision_id;
u32 abort;
@@ -72,6 +217,17 @@ struct nested_vmx {
bool vmon;
/* Has the level1 guest done vmclear? */
bool vmclear;
+ /* What is the location of the vmcs l1 keeps for l2? (in level1 gpa) */
+ u64 l1_cur_vmcs;
+ /*
+ * Level 2 state : includes vmcs,registers and
+ * a copy of vmcs12 for vmread/vmwrite
+ */
+ struct level_state *l2_state;
+
+ /* Level 1 state for switching to level 2 and back */
+ struct level_state *l1_state;
+
};
struct vcpu_vmx {
@@ -131,6 +287,25 @@ static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu
*vcpu)
return container_of(vcpu, struct vcpu_vmx, vcpu);
}
+static struct page *nested_get_page(struct kvm_vcpu *vcpu,
+ u64 vmcs_addr)
+{
+ struct page *vmcs_page = NULL;
+
+ down_read(¤t->mm->mmap_sem);
+ vmcs_page = gfn_to_page(vcpu->kvm, vmcs_addr >> PAGE_SHIFT);
+ up_read(¤t->mm->mmap_sem);
+
+ if (is_error_page(vmcs_page)) {
+ printk(KERN_ERR "%s error allocating page \n", __func__);
+ kvm_release_page_clean(vmcs_page);
+ return NULL;
+ }
+
+ return vmcs_page;
+
+}
+
static int init_rmode(struct kvm *kvm);
static u64 construct_eptp(unsigned long root_hpa);
@@ -188,6 +363,10 @@ static struct kvm_vmx_segment_field {
static void ept_save_pdptrs(struct kvm_vcpu *vcpu);
+static int create_l1_state(struct kvm_vcpu *vcpu);
+static int create_l2_state(struct kvm_vcpu *vcpu);
+static int shadow_vmcs_load(struct kvm_vcpu *vcpu);
+
/*
* Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it
* away by decrementing the array size.
@@ -704,6 +883,24 @@ static void vmx_load_host_state(struct vcpu_vmx *vmx)
preempt_enable();
}
+
+static int vmptrld(struct kvm_vcpu *vcpu,
+ u64 phys_addr)
+{
+ u8 error;
+
+ asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
+ : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
+ : "cc");
+ if (error) {
+ printk(KERN_ERR "kvm: %s vmptrld %llx failed\n",
+ __func__, phys_addr);
+ return 1;
+ }
+
+ return 0;
+}
+
/*
* Switches to specified vcpu, until a matching vcpu_put(), but assumes
* vcpu mutex is already taken.
@@ -725,15 +922,8 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
}
if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
- u8 error;
-
per_cpu(current_vmcs, cpu) = vmx->vmcs;
- asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
- : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
- : "cc");
- if (error)
- printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
- vmx->vmcs, phys_addr);
+ vmptrld(vcpu, phys_addr);
}
if (vcpu->cpu != cpu) {
@@ -3252,6 +3442,115 @@ static int handle_vmclear(struct kvm_vcpu *vcpu)
return 1;
}
+int read_guest_vmcs_gpa(struct kvm_vcpu *vcpu, u64 *gentry)
+{
+ gpa_t gpa;
+ struct page *page;
+ int r = 0;
+
+ gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vcpu->arch.regs[VCPU_REGS_RAX]);
+
+ /* checking guest gpa */
+ page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
+ if (is_error_page(page)) {
+ printk(KERN_ERR "%s Invalid guest vmcs addr %llx\n",
+ __func__, gpa);
+ r = 1;
+ goto out;
+ }
+
+ r = kvm_read_guest(vcpu->kvm, gpa, gentry, sizeof(u64));
+ if (r) {
+ printk(KERN_ERR "%s cannot read guest vmcs addr %llx : %d\n",
+ __func__, gpa, r);
+ goto out;
+ }
+
+ if (!IS_ALIGNED(*gentry, PAGE_SIZE)) {
+ printk(KERN_DEBUG "%s addr %llx not aligned\n",
+ __func__, *gentry);
+ return 1;
+ }
+
+out:
+ kvm_release_page_clean(page);
+ return r;
+}
+
+static int handle_vmptrld(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+ struct page *vmcs_page;
+ u64 guest_vmcs_addr;
+
+ if (!nested_vmx_check_permission(vcpu))
+ return 1;
+
+ if (read_guest_vmcs_gpa(vcpu, &guest_vmcs_addr))
+ return 1;
+
+ if (create_l1_state(vcpu)) {
+ printk(KERN_ERR "%s create_l1_state failed\n", __func__);
+ return 1;
+ }
+
+ if (create_l2_state(vcpu)) {
+ printk(KERN_ERR "%s create_l2_state failed\n", __func__);
+ return 1;
+ }
+
+ vmx->nested.l2_state->vmcs = alloc_vmcs();
+ if (!vmx->nested.l2_state->vmcs) {
+ printk(KERN_ERR "%s error in creating level 2 vmcs", __func__);
+ return 1;
+ }
+
+ if (vmx->nested.l1_cur_vmcs != guest_vmcs_addr) {
+ vmcs_page = nested_get_page(vcpu, guest_vmcs_addr);
+ if (vmcs_page == NULL)
+ return 1;
+
+ /* load nested vmcs to processor */
+ if (vmptrld(vcpu, page_to_phys(vmcs_page))) {
+ printk(KERN_INFO "%s error in vmptrld \n",
+ __func__);
+ kvm_release_page_clean(vmcs_page);
+ return 1;
+ }
+
+ /* save nested vmcs in the shadow vmcs */
+ if (shadow_vmcs_load(vcpu)) {
+ kvm_release_page_clean(vmcs_page);
+ return 1;
+ }
+
+ vmx->nested.l1_cur_vmcs = guest_vmcs_addr;
+
+ /* load to previous vmcs */
+ if (vmptrld(vcpu, __pa(to_vmx(vcpu)->vmcs))) {
+ kvm_release_page_clean(vmcs_page);
+ return 1;
+ }
+
+ kvm_release_page_clean(vmcs_page);
+ }
+ clear_rflags_cf_zf(vcpu);
+ skip_emulated_instruction(vcpu);
+ return 1;
+}
+
+static int handle_vmptrst(struct kvm_vcpu *vcpu)
+{
+ if (!nested_vmx_check_permission(vcpu))
+ return 1;
+
+ vcpu->arch.regs[VCPU_REGS_RAX] = to_vmx(vcpu)->nested.l1_cur_vmcs;
+
+ clear_rflags_cf_zf(vcpu);
+ skip_emulated_instruction(vcpu);
+ return 1;
+}
+
static int handle_vmx_insn(struct kvm_vcpu *vcpu)
{
kvm_queue_exception(vcpu, UD_VECTOR);
@@ -3576,8 +3875,8 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu
*vcpu) = {
[EXIT_REASON_VMCALL] = handle_vmcall,
[EXIT_REASON_VMCLEAR] = handle_vmclear,
[EXIT_REASON_VMLAUNCH] = handle_vmx_insn,
- [EXIT_REASON_VMPTRLD] = handle_vmx_insn,
- [EXIT_REASON_VMPTRST] = handle_vmx_insn,
+ [EXIT_REASON_VMPTRLD] = handle_vmptrld,
+ [EXIT_REASON_VMPTRST] = handle_vmptrst,
[EXIT_REASON_VMREAD] = handle_vmx_insn,
[EXIT_REASON_VMRESUME] = handle_vmx_insn,
[EXIT_REASON_VMWRITE] = handle_vmx_insn,
@@ -4115,6 +4414,220 @@ static bool vmx_gb_page_enable(void)
return false;
}
+void save_vmcs(struct shadow_vmcs *dst)
+{
+ dst->guest_es_selector = vmcs_read16(GUEST_ES_SELECTOR);
+ dst->guest_cs_selector = vmcs_read16(GUEST_CS_SELECTOR);
+ dst->guest_ss_selector = vmcs_read16(GUEST_SS_SELECTOR);
+ dst->guest_ds_selector = vmcs_read16(GUEST_DS_SELECTOR);
+ dst->guest_fs_selector = vmcs_read16(GUEST_FS_SELECTOR);
+ dst->guest_gs_selector = vmcs_read16(GUEST_GS_SELECTOR);
+ dst->guest_ldtr_selector = vmcs_read16(GUEST_LDTR_SELECTOR);
+ dst->guest_tr_selector = vmcs_read16(GUEST_TR_SELECTOR);
+ dst->host_es_selector = vmcs_read16(HOST_ES_SELECTOR);
+ dst->host_cs_selector = vmcs_read16(HOST_CS_SELECTOR);
+ dst->host_ss_selector = vmcs_read16(HOST_SS_SELECTOR);
+ dst->host_ds_selector = vmcs_read16(HOST_DS_SELECTOR);
+ dst->host_fs_selector = vmcs_read16(HOST_FS_SELECTOR);
+ dst->host_gs_selector = vmcs_read16(HOST_GS_SELECTOR);
+ dst->host_tr_selector = vmcs_read16(HOST_TR_SELECTOR);
+ dst->io_bitmap_a = vmcs_read64(IO_BITMAP_A);
+ dst->io_bitmap_b = vmcs_read64(IO_BITMAP_B);
+ if (cpu_has_vmx_msr_bitmap())
+ dst->msr_bitmap = vmcs_read64(MSR_BITMAP);
+
+ dst->vm_exit_msr_store_addr = vmcs_read64(VM_EXIT_MSR_STORE_ADDR);
+ dst->vm_exit_msr_load_addr = vmcs_read64(VM_EXIT_MSR_LOAD_ADDR);
+ dst->vm_entry_msr_load_addr = vmcs_read64(VM_ENTRY_MSR_LOAD_ADDR);
+ dst->tsc_offset = vmcs_read64(TSC_OFFSET);
+ dst->virtual_apic_page_addr = vmcs_read64(VIRTUAL_APIC_PAGE_ADDR);
+ dst->apic_access_addr = vmcs_read64(APIC_ACCESS_ADDR);
+ if (enable_ept)
+ dst->ept_pointer = vmcs_read64(EPT_POINTER);
+
+ dst->guest_physical_address = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
+ dst->vmcs_link_pointer = vmcs_read64(VMCS_LINK_POINTER);
+ dst->guest_ia32_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL);
+ if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT)
+ dst->guest_ia32_pat = vmcs_read64(GUEST_IA32_PAT);
+ if (enable_ept) {
+ dst->guest_pdptr0 = vmcs_read64(GUEST_PDPTR0);
+ dst->guest_pdptr1 = vmcs_read64(GUEST_PDPTR1);
+ dst->guest_pdptr2 = vmcs_read64(GUEST_PDPTR2);
+ dst->guest_pdptr3 = vmcs_read64(GUEST_PDPTR3);
+ }
+ dst->pin_based_vm_exec_control = vmcs_read32(PIN_BASED_VM_EXEC_CONTROL);
+ dst->cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
+ dst->exception_bitmap = vmcs_read32(EXCEPTION_BITMAP);
+ dst->page_fault_error_code_mask =
+ vmcs_read32(PAGE_FAULT_ERROR_CODE_MASK);
+ dst->page_fault_error_code_match =
+ vmcs_read32(PAGE_FAULT_ERROR_CODE_MATCH);
+ dst->cr3_target_count = vmcs_read32(CR3_TARGET_COUNT);
+ dst->vm_exit_controls = vmcs_read32(VM_EXIT_CONTROLS);
+ dst->vm_exit_msr_store_count = vmcs_read32(VM_EXIT_MSR_STORE_COUNT);
+ dst->vm_exit_msr_load_count = vmcs_read32(VM_EXIT_MSR_LOAD_COUNT);
+ dst->vm_entry_controls = vmcs_read32(VM_ENTRY_CONTROLS);
+ dst->vm_entry_msr_load_count = vmcs_read32(VM_ENTRY_MSR_LOAD_COUNT);
+ dst->vm_entry_intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD);
+ dst->vm_entry_exception_error_code =
+ vmcs_read32(VM_ENTRY_EXCEPTION_ERROR_CODE);
+ dst->vm_entry_instruction_len = vmcs_read32(VM_ENTRY_INSTRUCTION_LEN);
+ dst->tpr_threshold = vmcs_read32(TPR_THRESHOLD);
+ dst->secondary_vm_exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
+ if (enable_vpid && dst->secondary_vm_exec_control &
+ SECONDARY_EXEC_ENABLE_VPID)
+ dst->virtual_processor_id = vmcs_read16(VIRTUAL_PROCESSOR_ID);
+ dst->vm_instruction_error = vmcs_read32(VM_INSTRUCTION_ERROR);
+ dst->vm_exit_reason = vmcs_read32(VM_EXIT_REASON);
+ dst->vm_exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
+ dst->vm_exit_intr_error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
+ dst->idt_vectoring_info_field = vmcs_read32(IDT_VECTORING_INFO_FIELD);
+ dst->idt_vectoring_error_code = vmcs_read32(IDT_VECTORING_ERROR_CODE);
+ dst->vm_exit_instruction_len = vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
+ dst->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
+ dst->guest_es_limit = vmcs_read32(GUEST_ES_LIMIT);
+ dst->guest_cs_limit = vmcs_read32(GUEST_CS_LIMIT);
+ dst->guest_ss_limit = vmcs_read32(GUEST_SS_LIMIT);
+ dst->guest_ds_limit = vmcs_read32(GUEST_DS_LIMIT);
+ dst->guest_fs_limit = vmcs_read32(GUEST_FS_LIMIT);
+ dst->guest_gs_limit = vmcs_read32(GUEST_GS_LIMIT);
+ dst->guest_ldtr_limit = vmcs_read32(GUEST_LDTR_LIMIT);
+ dst->guest_tr_limit = vmcs_read32(GUEST_TR_LIMIT);
+ dst->guest_gdtr_limit = vmcs_read32(GUEST_GDTR_LIMIT);
+ dst->guest_idtr_limit = vmcs_read32(GUEST_IDTR_LIMIT);
+ dst->guest_es_ar_bytes = vmcs_read32(GUEST_ES_AR_BYTES);
+ dst->guest_cs_ar_bytes = vmcs_read32(GUEST_CS_AR_BYTES);
+ dst->guest_ss_ar_bytes = vmcs_read32(GUEST_SS_AR_BYTES);
+ dst->guest_ds_ar_bytes = vmcs_read32(GUEST_DS_AR_BYTES);
+ dst->guest_fs_ar_bytes = vmcs_read32(GUEST_FS_AR_BYTES);
+ dst->guest_gs_ar_bytes = vmcs_read32(GUEST_GS_AR_BYTES);
+ dst->guest_ldtr_ar_bytes = vmcs_read32(GUEST_LDTR_AR_BYTES);
+ dst->guest_tr_ar_bytes = vmcs_read32(GUEST_TR_AR_BYTES);
+ dst->guest_interruptibility_info =
+ vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
+ dst->guest_activity_state = vmcs_read32(GUEST_ACTIVITY_STATE);
+ dst->guest_sysenter_cs = vmcs_read32(GUEST_SYSENTER_CS);
+ dst->host_ia32_sysenter_cs = vmcs_read32(HOST_IA32_SYSENTER_CS);
+ dst->cr0_guest_host_mask = vmcs_readl(CR0_GUEST_HOST_MASK);
+ dst->cr4_guest_host_mask = vmcs_readl(CR4_GUEST_HOST_MASK);
+ dst->cr0_read_shadow = vmcs_readl(CR0_READ_SHADOW);
+ dst->cr4_read_shadow = vmcs_readl(CR4_READ_SHADOW);
+ dst->cr3_target_value0 = vmcs_readl(CR3_TARGET_VALUE0);
+ dst->cr3_target_value1 = vmcs_readl(CR3_TARGET_VALUE1);
+ dst->cr3_target_value2 = vmcs_readl(CR3_TARGET_VALUE2);
+ dst->cr3_target_value3 = vmcs_readl(CR3_TARGET_VALUE3);
+ dst->exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
+ dst->guest_linear_address = vmcs_readl(GUEST_LINEAR_ADDRESS);
+ dst->guest_cr0 = vmcs_readl(GUEST_CR0);
+ dst->guest_cr3 = vmcs_readl(GUEST_CR3);
+ dst->guest_cr4 = vmcs_readl(GUEST_CR4);
+ dst->guest_es_base = vmcs_readl(GUEST_ES_BASE);
+ dst->guest_cs_base = vmcs_readl(GUEST_CS_BASE);
+ dst->guest_ss_base = vmcs_readl(GUEST_SS_BASE);
+ dst->guest_ds_base = vmcs_readl(GUEST_DS_BASE);
+ dst->guest_fs_base = vmcs_readl(GUEST_FS_BASE);
+ dst->guest_gs_base = vmcs_readl(GUEST_GS_BASE);
+ dst->guest_ldtr_base = vmcs_readl(GUEST_LDTR_BASE);
+ dst->guest_tr_base = vmcs_readl(GUEST_TR_BASE);
+ dst->guest_gdtr_base = vmcs_readl(GUEST_GDTR_BASE);
+ dst->guest_idtr_base = vmcs_readl(GUEST_IDTR_BASE);
+ dst->guest_dr7 = vmcs_readl(GUEST_DR7);
+ dst->guest_rsp = vmcs_readl(GUEST_RSP);
+ dst->guest_rip = vmcs_readl(GUEST_RIP);
+ dst->guest_rflags = vmcs_readl(GUEST_RFLAGS);
+ dst->guest_pending_dbg_exceptions =
+ vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS);
+ dst->guest_sysenter_esp = vmcs_readl(GUEST_SYSENTER_ESP);
+ dst->guest_sysenter_eip = vmcs_readl(GUEST_SYSENTER_EIP);
+ dst->host_cr0 = vmcs_readl(HOST_CR0);
+ dst->host_cr3 = vmcs_readl(HOST_CR3);
+ dst->host_cr4 = vmcs_readl(HOST_CR4);
+ dst->host_fs_base = vmcs_readl(HOST_FS_BASE);
+ dst->host_gs_base = vmcs_readl(HOST_GS_BASE);
+ dst->host_tr_base = vmcs_readl(HOST_TR_BASE);
+ dst->host_gdtr_base = vmcs_readl(HOST_GDTR_BASE);
+ dst->host_idtr_base = vmcs_readl(HOST_IDTR_BASE);
+ dst->host_ia32_sysenter_esp = vmcs_readl(HOST_IA32_SYSENTER_ESP);
+ dst->host_ia32_sysenter_eip = vmcs_readl(HOST_IA32_SYSENTER_EIP);
+ dst->host_rsp = vmcs_readl(HOST_RSP);
+ dst->host_rip = vmcs_readl(HOST_RIP);
+ if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT)
+ dst->host_ia32_pat = vmcs_read64(HOST_IA32_PAT);
+}
+
+static int shadow_vmcs_load(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+
+ if (!vmx->nested.l2_state->shadow_vmcs) {
+ vmx->nested.l2_state->shadow_vmcs =
+ kzalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!vmx->nested.l2_state->shadow_vmcs) {
+ printk(KERN_INFO "%s error creating nested vmcs\n",
+ __func__);
+ return -ENOMEM;
+ }
+ }
+
+ save_vmcs(vmx->nested.l2_state->shadow_vmcs);
+
+ return 0;
+}
+
+struct level_state *create_state(void)
+{
+ struct level_state *state = NULL;
+
+ state = kzalloc(sizeof(struct level_state), GFP_KERNEL);
+ if (!state) {
+ printk(KERN_INFO "Error create level state\n");
+ return NULL;
+ }
+ state->shadow_vmcs = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!state->shadow_vmcs) {
+ printk(KERN_INFO "%s error creating shadow vmcs\n",
+ __func__);
+ kfree(state);
+ return NULL;
+ }
+ return state;
+}
+
+int create_l1_state(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+
+ if (!vmx->nested.l1_state) {
+ vmx->nested.l1_state = create_state();
+ if (!vmx->nested.l1_state)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+int create_l2_state(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+
+ if (!vmx->nested.l2_state) {
+ vmx->nested.l2_state = create_state();
+ if (!vmx->nested.l2_state)
+ return -ENOMEM;
+ }
+
+ if (cpu_has_vmx_msr_bitmap())
+ vmx->nested.l2_state->msr_bitmap = vmcs_read64(MSR_BITMAP);
+ else
+ vmx->nested.l2_state->msr_bitmap = 0;
+
+ vmx->nested.l2_state->io_bitmap_a = vmcs_read64(IO_BITMAP_A);
+ vmx->nested.l2_state->io_bitmap_b = vmcs_read64(IO_BITMAP_B);
+
+ return 0;
+}
+
static struct kvm_x86_ops vmx_x86_ops = {
.cpu_has_kvm_support = cpu_has_kvm_support,
.disabled_by_bios = vmx_disabled_by_bios,
--
1.6.0.4
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