From patchwork Thu Oct 15 14:41:45 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: oritw@il.ibm.com X-Patchwork-Id: 54030 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n9FEnoES002568 for ; Thu, 15 Oct 2009 14:49:51 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760154AbZJOOm4 (ORCPT ); Thu, 15 Oct 2009 10:42:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760736AbZJOOmz (ORCPT ); Thu, 15 Oct 2009 10:42:55 -0400 Received: from mtagate4.uk.ibm.com ([195.212.29.137]:45190 "EHLO mtagate4.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760154AbZJOOmy (ORCPT ); Thu, 15 Oct 2009 10:42:54 -0400 Received: from d06nrmr1707.portsmouth.uk.ibm.com (d06nrmr1707.portsmouth.uk.ibm.com [9.149.39.225]) by mtagate4.uk.ibm.com (8.14.3/8.13.8) with ESMTP id n9FEg2Ff153224 for ; Thu, 15 Oct 2009 14:42:07 GMT Received: from d06av02.portsmouth.uk.ibm.com (d06av02.portsmouth.uk.ibm.com [9.149.37.228]) by d06nrmr1707.portsmouth.uk.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id n9FEfpBo1802286 for ; Thu, 15 Oct 2009 15:41:51 +0100 Received: from d06av02.portsmouth.uk.ibm.com (loopback [127.0.0.1]) by d06av02.portsmouth.uk.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n9FEfpvk027771 for ; Thu, 15 Oct 2009 15:41:51 +0100 Received: from localhost.localdomain (cluwyn.haifa.ibm.com [9.148.27.75]) by d06av02.portsmouth.uk.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id n9FEfkfI027601; Thu, 15 Oct 2009 15:41:50 +0100 From: oritw@il.ibm.com To: kvm@vger.kernel.org Cc: oritw@il.ibm.com, benami@il.ibm.com, abelg@il.ibm.com, muli@il.ibm.com, aliguori@us.ibm.com, mdday@us.ibm.com Subject: [PATCH 4/5] Nested VMX patch 4 implements vmread and vmwrite Date: Thu, 15 Oct 2009 16:41:45 +0200 Message-Id: <1255617706-13564-5-git-send-email-oritw@il.ibm.com> X-Mailer: git-send-email 1.6.0.4 In-Reply-To: <1255617706-13564-4-git-send-email-oritw@il.ibm.com> References: <1255617706-13564-1-git-send-email-oritw@il.ibm.com> <1255617706-13564-2-git-send-email-oritw@il.ibm.com> <1255617706-13564-3-git-send-email-oritw@il.ibm.com> <1255617706-13564-4-git-send-email-oritw@il.ibm.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 8c186e0..6a4c252 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -225,6 +225,21 @@ struct nested_vmx { struct level_state *l1_state; }; +enum vmcs_field_type { + VMCS_FIELD_TYPE_U16 = 0, + VMCS_FIELD_TYPE_U64 = 1, + VMCS_FIELD_TYPE_U32 = 2, + VMCS_FIELD_TYPE_ULONG = 3 +}; + +#define VMCS_FIELD_LENGTH_OFFSET 13 +#define VMCS_FIELD_LENGTH_MASK 0x6000 + +static inline int vmcs_field_length(unsigned long field) +{ + return (VMCS_FIELD_LENGTH_MASK & field) >> 13; +} + struct vmcs { u32 revision_id; u32 abort; @@ -288,6 +303,404 @@ static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) return container_of(vcpu, struct vcpu_vmx, vcpu); } +#define SHADOW_VMCS_OFFSET(x) offsetof(struct shadow_vmcs, x) + +static unsigned short vmcs_field_to_offset_table[HOST_RIP+1] = { + + [VIRTUAL_PROCESSOR_ID] = + SHADOW_VMCS_OFFSET(virtual_processor_id), + [GUEST_ES_SELECTOR] = + SHADOW_VMCS_OFFSET(guest_es_selector), + [GUEST_CS_SELECTOR] = + SHADOW_VMCS_OFFSET(guest_cs_selector), + [GUEST_SS_SELECTOR] = + SHADOW_VMCS_OFFSET(guest_ss_selector), + [GUEST_DS_SELECTOR] = + SHADOW_VMCS_OFFSET(guest_ds_selector), + [GUEST_FS_SELECTOR] = + SHADOW_VMCS_OFFSET(guest_fs_selector), + [GUEST_GS_SELECTOR] = + SHADOW_VMCS_OFFSET(guest_gs_selector), + [GUEST_LDTR_SELECTOR] = + SHADOW_VMCS_OFFSET(guest_ldtr_selector), + [GUEST_TR_SELECTOR] = + SHADOW_VMCS_OFFSET(guest_tr_selector), + [HOST_ES_SELECTOR] = + SHADOW_VMCS_OFFSET(host_es_selector), + [HOST_CS_SELECTOR] = + SHADOW_VMCS_OFFSET(host_cs_selector), + [HOST_SS_SELECTOR] = + SHADOW_VMCS_OFFSET(host_ss_selector), + [HOST_DS_SELECTOR] = + SHADOW_VMCS_OFFSET(host_ds_selector), + [HOST_FS_SELECTOR] = + SHADOW_VMCS_OFFSET(host_fs_selector), + [HOST_GS_SELECTOR] = + SHADOW_VMCS_OFFSET(host_gs_selector), + [HOST_TR_SELECTOR] = + SHADOW_VMCS_OFFSET(host_tr_selector), + [IO_BITMAP_A] = + SHADOW_VMCS_OFFSET(io_bitmap_a), + [IO_BITMAP_A_HIGH] = + SHADOW_VMCS_OFFSET(io_bitmap_a)+4, + [IO_BITMAP_B] = + SHADOW_VMCS_OFFSET(io_bitmap_b), + [IO_BITMAP_B_HIGH] = + SHADOW_VMCS_OFFSET(io_bitmap_b)+4, + [MSR_BITMAP] = + SHADOW_VMCS_OFFSET(msr_bitmap), + [MSR_BITMAP_HIGH] = + SHADOW_VMCS_OFFSET(msr_bitmap)+4, + [VM_EXIT_MSR_STORE_ADDR] = + SHADOW_VMCS_OFFSET(vm_exit_msr_store_addr), + [VM_EXIT_MSR_STORE_ADDR_HIGH] = + SHADOW_VMCS_OFFSET(vm_exit_msr_store_addr)+4, + [VM_EXIT_MSR_LOAD_ADDR] = + SHADOW_VMCS_OFFSET(vm_exit_msr_load_addr), + [VM_EXIT_MSR_LOAD_ADDR_HIGH] = + SHADOW_VMCS_OFFSET(vm_exit_msr_load_addr)+4, + [VM_ENTRY_MSR_LOAD_ADDR] = + SHADOW_VMCS_OFFSET(vm_entry_msr_load_addr), + [VM_ENTRY_MSR_LOAD_ADDR_HIGH] = + SHADOW_VMCS_OFFSET(vm_entry_msr_load_addr)+4, + [TSC_OFFSET] = + SHADOW_VMCS_OFFSET(tsc_offset), + [TSC_OFFSET_HIGH] = + SHADOW_VMCS_OFFSET(tsc_offset)+4, + [VIRTUAL_APIC_PAGE_ADDR] = + SHADOW_VMCS_OFFSET(virtual_apic_page_addr), + [VIRTUAL_APIC_PAGE_ADDR_HIGH] = + SHADOW_VMCS_OFFSET(virtual_apic_page_addr)+4, + [APIC_ACCESS_ADDR] = + SHADOW_VMCS_OFFSET(apic_access_addr), + [APIC_ACCESS_ADDR_HIGH] = + SHADOW_VMCS_OFFSET(apic_access_addr)+4, + [EPT_POINTER] = + SHADOW_VMCS_OFFSET(ept_pointer), + [EPT_POINTER_HIGH] = + SHADOW_VMCS_OFFSET(ept_pointer)+4, + [GUEST_PHYSICAL_ADDRESS] = + SHADOW_VMCS_OFFSET(guest_physical_address), + [GUEST_PHYSICAL_ADDRESS_HIGH] = + SHADOW_VMCS_OFFSET(guest_physical_address)+4, + [VMCS_LINK_POINTER] = + SHADOW_VMCS_OFFSET(vmcs_link_pointer), + [VMCS_LINK_POINTER_HIGH] = + SHADOW_VMCS_OFFSET(vmcs_link_pointer)+4, + [GUEST_IA32_DEBUGCTL] = + SHADOW_VMCS_OFFSET(guest_ia32_debugctl), + [GUEST_IA32_DEBUGCTL_HIGH] = + SHADOW_VMCS_OFFSET(guest_ia32_debugctl)+4, + [GUEST_IA32_PAT] = + SHADOW_VMCS_OFFSET(guest_ia32_pat), + [GUEST_IA32_PAT_HIGH] = + SHADOW_VMCS_OFFSET(guest_ia32_pat)+4, + [GUEST_PDPTR0] = + SHADOW_VMCS_OFFSET(guest_pdptr0), + [GUEST_PDPTR0_HIGH] = + SHADOW_VMCS_OFFSET(guest_pdptr0)+4, + [GUEST_PDPTR1] = + SHADOW_VMCS_OFFSET(guest_pdptr1), + [GUEST_PDPTR1_HIGH] = + SHADOW_VMCS_OFFSET(guest_pdptr1)+4, + [GUEST_PDPTR2] = + SHADOW_VMCS_OFFSET(guest_pdptr2), + [GUEST_PDPTR2_HIGH] = + SHADOW_VMCS_OFFSET(guest_pdptr2)+4, + [GUEST_PDPTR3] = + SHADOW_VMCS_OFFSET(guest_pdptr3), + [GUEST_PDPTR3_HIGH] = + SHADOW_VMCS_OFFSET(guest_pdptr3)+4, + [HOST_IA32_PAT] = + SHADOW_VMCS_OFFSET(host_ia32_pat), + [HOST_IA32_PAT_HIGH] = + SHADOW_VMCS_OFFSET(host_ia32_pat)+4, + [PIN_BASED_VM_EXEC_CONTROL] = + SHADOW_VMCS_OFFSET(pin_based_vm_exec_control), + [CPU_BASED_VM_EXEC_CONTROL] = + SHADOW_VMCS_OFFSET(cpu_based_vm_exec_control), + [EXCEPTION_BITMAP] = + SHADOW_VMCS_OFFSET(exception_bitmap), + [PAGE_FAULT_ERROR_CODE_MASK] = + SHADOW_VMCS_OFFSET(page_fault_error_code_mask), + [PAGE_FAULT_ERROR_CODE_MATCH] = + SHADOW_VMCS_OFFSET(page_fault_error_code_match), + [CR3_TARGET_COUNT] = + SHADOW_VMCS_OFFSET(cr3_target_count), + [VM_EXIT_CONTROLS] = + SHADOW_VMCS_OFFSET(vm_exit_controls), + [VM_EXIT_MSR_STORE_COUNT] = + SHADOW_VMCS_OFFSET(vm_exit_msr_store_count), + [VM_EXIT_MSR_LOAD_COUNT] = + SHADOW_VMCS_OFFSET(vm_exit_msr_load_count), + [VM_ENTRY_CONTROLS] = + SHADOW_VMCS_OFFSET(vm_entry_controls), + [VM_ENTRY_MSR_LOAD_COUNT] = + SHADOW_VMCS_OFFSET(vm_entry_msr_load_count), + [VM_ENTRY_INTR_INFO_FIELD] = + SHADOW_VMCS_OFFSET(vm_entry_intr_info_field), + [VM_ENTRY_EXCEPTION_ERROR_CODE] = + SHADOW_VMCS_OFFSET(vm_entry_exception_error_code), + [VM_ENTRY_INSTRUCTION_LEN] = + SHADOW_VMCS_OFFSET(vm_entry_instruction_len), + [TPR_THRESHOLD] = + SHADOW_VMCS_OFFSET(tpr_threshold), + [SECONDARY_VM_EXEC_CONTROL] = + SHADOW_VMCS_OFFSET(secondary_vm_exec_control), + [VM_INSTRUCTION_ERROR] = + SHADOW_VMCS_OFFSET(vm_instruction_error), + [VM_EXIT_REASON] = + SHADOW_VMCS_OFFSET(vm_exit_reason), + [VM_EXIT_INTR_INFO] = + SHADOW_VMCS_OFFSET(vm_exit_intr_info), + [VM_EXIT_INTR_ERROR_CODE] = + SHADOW_VMCS_OFFSET(vm_exit_intr_error_code), + [IDT_VECTORING_INFO_FIELD] = + SHADOW_VMCS_OFFSET(idt_vectoring_info_field), + [IDT_VECTORING_ERROR_CODE] = + SHADOW_VMCS_OFFSET(idt_vectoring_error_code), + [VM_EXIT_INSTRUCTION_LEN] = + SHADOW_VMCS_OFFSET(vm_exit_instruction_len), + [VMX_INSTRUCTION_INFO] = + SHADOW_VMCS_OFFSET(vmx_instruction_info), + [GUEST_ES_LIMIT] = + SHADOW_VMCS_OFFSET(guest_es_limit), + [GUEST_CS_LIMIT] = + SHADOW_VMCS_OFFSET(guest_cs_limit), + [GUEST_SS_LIMIT] = + SHADOW_VMCS_OFFSET(guest_ss_limit), + [GUEST_DS_LIMIT] = + SHADOW_VMCS_OFFSET(guest_ds_limit), + [GUEST_FS_LIMIT] = + SHADOW_VMCS_OFFSET(guest_fs_limit), + [GUEST_GS_LIMIT] = + SHADOW_VMCS_OFFSET(guest_gs_limit), + [GUEST_LDTR_LIMIT] = + SHADOW_VMCS_OFFSET(guest_ldtr_limit), + [GUEST_TR_LIMIT] = + SHADOW_VMCS_OFFSET(guest_tr_limit), + [GUEST_GDTR_LIMIT] = + SHADOW_VMCS_OFFSET(guest_gdtr_limit), + [GUEST_IDTR_LIMIT] = + SHADOW_VMCS_OFFSET(guest_idtr_limit), + [GUEST_ES_AR_BYTES] = + SHADOW_VMCS_OFFSET(guest_es_ar_bytes), + [GUEST_CS_AR_BYTES] = + SHADOW_VMCS_OFFSET(guest_cs_ar_bytes), + [GUEST_SS_AR_BYTES] = + SHADOW_VMCS_OFFSET(guest_ss_ar_bytes), + [GUEST_DS_AR_BYTES] = + SHADOW_VMCS_OFFSET(guest_ds_ar_bytes), + [GUEST_FS_AR_BYTES] = + SHADOW_VMCS_OFFSET(guest_fs_ar_bytes), + [GUEST_GS_AR_BYTES] = + SHADOW_VMCS_OFFSET(guest_gs_ar_bytes), + [GUEST_LDTR_AR_BYTES] = + SHADOW_VMCS_OFFSET(guest_ldtr_ar_bytes), + [GUEST_TR_AR_BYTES] = + SHADOW_VMCS_OFFSET(guest_tr_ar_bytes), + [GUEST_INTERRUPTIBILITY_INFO] = + SHADOW_VMCS_OFFSET(guest_interruptibility_info), + [GUEST_ACTIVITY_STATE] = + SHADOW_VMCS_OFFSET(guest_activity_state), + [GUEST_SYSENTER_CS] = + SHADOW_VMCS_OFFSET(guest_sysenter_cs), + [HOST_IA32_SYSENTER_CS] = + SHADOW_VMCS_OFFSET(host_ia32_sysenter_cs), + [CR0_GUEST_HOST_MASK] = + SHADOW_VMCS_OFFSET(cr0_guest_host_mask), + [CR4_GUEST_HOST_MASK] = + SHADOW_VMCS_OFFSET(cr4_guest_host_mask), + [CR0_READ_SHADOW] = + SHADOW_VMCS_OFFSET(cr0_read_shadow), + [CR4_READ_SHADOW] = + SHADOW_VMCS_OFFSET(cr4_read_shadow), + [CR3_TARGET_VALUE0] = + SHADOW_VMCS_OFFSET(cr3_target_value0), + [CR3_TARGET_VALUE1] = + SHADOW_VMCS_OFFSET(cr3_target_value1), + [CR3_TARGET_VALUE2] = + SHADOW_VMCS_OFFSET(cr3_target_value2), + [CR3_TARGET_VALUE3] = + SHADOW_VMCS_OFFSET(cr3_target_value3), + [EXIT_QUALIFICATION] = + SHADOW_VMCS_OFFSET(exit_qualification), + [GUEST_LINEAR_ADDRESS] = + SHADOW_VMCS_OFFSET(guest_linear_address), + [GUEST_CR0] = + SHADOW_VMCS_OFFSET(guest_cr0), + [GUEST_CR3] = + SHADOW_VMCS_OFFSET(guest_cr3), + [GUEST_CR4] = + SHADOW_VMCS_OFFSET(guest_cr4), + [GUEST_ES_BASE] = + SHADOW_VMCS_OFFSET(guest_es_base), + [GUEST_CS_BASE] = + SHADOW_VMCS_OFFSET(guest_cs_base), + [GUEST_SS_BASE] = + SHADOW_VMCS_OFFSET(guest_ss_base), + [GUEST_DS_BASE] = + SHADOW_VMCS_OFFSET(guest_ds_base), + [GUEST_FS_BASE] = + SHADOW_VMCS_OFFSET(guest_fs_base), + [GUEST_GS_BASE] = + SHADOW_VMCS_OFFSET(guest_gs_base), + [GUEST_LDTR_BASE] = + SHADOW_VMCS_OFFSET(guest_ldtr_base), + [GUEST_TR_BASE] = + SHADOW_VMCS_OFFSET(guest_tr_base), + [GUEST_GDTR_BASE] = + SHADOW_VMCS_OFFSET(guest_gdtr_base), + [GUEST_IDTR_BASE] = + SHADOW_VMCS_OFFSET(guest_idtr_base), + [GUEST_DR7] = + SHADOW_VMCS_OFFSET(guest_dr7), + [GUEST_RSP] = + SHADOW_VMCS_OFFSET(guest_rsp), + [GUEST_RIP] = + SHADOW_VMCS_OFFSET(guest_rip), + [GUEST_RFLAGS] = + SHADOW_VMCS_OFFSET(guest_rflags), + [GUEST_PENDING_DBG_EXCEPTIONS] = + SHADOW_VMCS_OFFSET(guest_pending_dbg_exceptions), + [GUEST_SYSENTER_ESP] = + SHADOW_VMCS_OFFSET(guest_sysenter_esp), + [GUEST_SYSENTER_EIP] = + SHADOW_VMCS_OFFSET(guest_sysenter_eip), + [HOST_CR0] = + SHADOW_VMCS_OFFSET(host_cr0), + [HOST_CR3] = + SHADOW_VMCS_OFFSET(host_cr3), + [HOST_CR4] = + SHADOW_VMCS_OFFSET(host_cr4), + [HOST_FS_BASE] = + SHADOW_VMCS_OFFSET(host_fs_base), + [HOST_GS_BASE] = + SHADOW_VMCS_OFFSET(host_gs_base), + [HOST_TR_BASE] = + SHADOW_VMCS_OFFSET(host_tr_base), + [HOST_GDTR_BASE] = + SHADOW_VMCS_OFFSET(host_gdtr_base), + [HOST_IDTR_BASE] = + SHADOW_VMCS_OFFSET(host_idtr_base), + [HOST_IA32_SYSENTER_ESP] = + SHADOW_VMCS_OFFSET(host_ia32_sysenter_esp), + [HOST_IA32_SYSENTER_EIP] = + SHADOW_VMCS_OFFSET(host_ia32_sysenter_eip), + [HOST_RSP] = + SHADOW_VMCS_OFFSET(host_rsp), + [HOST_RIP] = + SHADOW_VMCS_OFFSET(host_rip), +}; + +static inline unsigned short vmcs_field_to_offset(unsigned long field) +{ + + if (field > HOST_RIP || vmcs_field_to_offset_table[field] == 0) { + printk(KERN_ERR "invalid vmcs encoding 0x%lx\n", field); + return -1; + } + + return vmcs_field_to_offset_table[field]; +} + +static inline unsigned long nested_vmcs_readl(struct kvm_vcpu *vcpu, + unsigned long field) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + unsigned long *entry; + + if (!vmx->nested.l2_state->shadow_vmcs) { + printk(KERN_ERR "%s invalid nested vmcs\n", __func__); + return -1; + } + + entry = (unsigned long *)((char *)(vmx->nested.l2_state->shadow_vmcs) + + vmcs_field_to_offset(field)); + return *entry; +} + +static inline u16 nested_vmcs_read16(struct kvm_vcpu *vcpu, + unsigned long field) +{ + return nested_vmcs_readl(vcpu, field); +} + +static inline u32 nested_vmcs_read32(struct kvm_vcpu *vcpu, unsigned long field) +{ + return nested_vmcs_readl(vcpu, field); +} + +static inline u64 nested_vmcs_read64(struct kvm_vcpu *vcpu, unsigned long field) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + u64 *entry; + if (!vmx->nested.l2_state->shadow_vmcs) { + printk(KERN_ERR "%s invalid nested vmcs\n", __func__); + return -1; + } + + entry = (u64 *)((char *)(vmx->nested.l2_state->shadow_vmcs) + + vmcs_field_to_offset(field)); + return *entry; +} + +static inline void nested_vmcs_writel(struct kvm_vcpu *vcpu, + unsigned long field, unsigned long value) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + unsigned long entry = + (unsigned long)(vmx->nested.l2_state->shadow_vmcs); + + if (!vmx->nested.l2_state->shadow_vmcs) { + printk(KERN_ERR "%s invalid nested vmcs\n", __func__); + return; + } + entry += vmcs_field_to_offset(field); + *(unsigned long *)entry = value; +} + +static inline void nested_vmcs_write16(struct kvm_vcpu *vcpu, + unsigned long field, u16 value) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + unsigned long entry = + (unsigned long)(vmx->nested.l2_state->shadow_vmcs); + + if (!vmx->nested.l2_state->shadow_vmcs) { + printk(KERN_ERR "%s invalid nested vmcs\n", __func__); + return; + } + entry += vmcs_field_to_offset(field); + *(u16 *)entry = value; +} + +static inline void nested_vmcs_write32(struct kvm_vcpu *vcpu, + unsigned long field, u32 value) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + unsigned long entry = + (unsigned long)(vmx->nested.l2_state->shadow_vmcs); + + if (!vmx->nested.l2_state->shadow_vmcs) { + printk(KERN_ERR "%s invalid nested vmcs\n", __func__); + return; + } + entry += vmcs_field_to_offset(field); + *(u32 *)entry = value; +} + +static inline void nested_vmcs_write64(struct kvm_vcpu *vcpu, + unsigned long field, u64 value) +{ +#ifdef CONFIG_X86_64 + nested_vmcs_writel(vcpu, field, value); +#else /* nested: 32 bit not actually tested */ + nested_vmcs_writel(vcpu, field, value); + nested_vmcs_writel(vcpu, field+1, value >> 32); +#endif +} + static struct page *nested_get_page(struct kvm_vcpu *vcpu, u64 vmcs_addr) { @@ -307,6 +720,50 @@ static struct page *nested_get_page(struct kvm_vcpu *vcpu, } +static int nested_map_shadow_vmcs(struct kvm_vcpu *vcpu) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + struct page *vmcs_page = nested_get_page(vcpu, vmx->nested.vmptr); + + if (vmcs_page == NULL) { + printk(KERN_INFO "%s: failure in nested_get_page\n",__func__); + return 0; + } + + if (vmx->nested.l2_state->shadow_vmcs) { + printk(KERN_INFO "%s: shadow vmcs already mapped\n",__func__); + return 0; + } + + vmx->nested.l2_state->shadow_vmcs = kmap_atomic(vmcs_page, KM_USER0); + + if (!vmx->nested.l2_state->shadow_vmcs) { + printk(KERN_INFO "%s: error in kmap_atomic\n",__func__); + return 0; + } + + return 1; +} + +static void nested_unmap_shadow_vmcs(struct kvm_vcpu *vcpu) +{ + struct page *page; + struct vcpu_vmx *vmx = to_vmx(vcpu); + + if (!vmx->nested.l2_state->shadow_vmcs) { + printk("Shadow vmcs already unmapped\n"); + return; + } + + page = kmap_atomic_to_page(vmx->nested.l2_state->shadow_vmcs); + + kunmap_atomic(vmx->nested.l2_state->shadow_vmcs, KM_USER0); + + kvm_release_page_dirty(page); + + vmx->nested.l2_state->shadow_vmcs = NULL; +} + static int init_rmode(struct kvm *kvm); static u64 construct_eptp(unsigned long root_hpa); @@ -3550,6 +4007,26 @@ static void clear_rflags_cf_zf(struct kvm_vcpu *vcpu) vmx_set_rflags(vcpu, rflags); } +static void set_rflags_to_vmx_fail_invalid(struct kvm_vcpu *vcpu) +{ + unsigned long rflags; + rflags = vmx_get_rflags(vcpu); + rflags |= X86_EFLAGS_CF; + rflags &= ~X86_EFLAGS_PF & ~X86_EFLAGS_AF & ~X86_EFLAGS_ZF & + ~X86_EFLAGS_SF & ~X86_EFLAGS_OF; + vmx_set_rflags(vcpu, rflags); +} + +static void set_rflags_to_vmx_fail_valid(struct kvm_vcpu *vcpu) +{ + unsigned long rflags; + rflags = vmx_get_rflags(vcpu); + rflags |= X86_EFLAGS_ZF; + rflags &= ~X86_EFLAGS_PF & ~X86_EFLAGS_AF & ~X86_EFLAGS_CF & + ~X86_EFLAGS_SF & ~X86_EFLAGS_OF; + vmx_set_rflags(vcpu, rflags); +} + static int handle_vmclear(struct kvm_vcpu *vcpu) { if (!nested_vmx_check_permission(vcpu)) @@ -3563,6 +4040,116 @@ static int handle_vmclear(struct kvm_vcpu *vcpu) return 1; } +static int handle_vmread(struct kvm_vcpu *vcpu) +{ +#ifndef CONFIG_X86_64 + u64 value; +#endif + + if (!nested_vmx_check_permission(vcpu)) + return 1; + + if (!nested_map_shadow_vmcs(vcpu)) { + printk(KERN_INFO "%s invalid shadow vmcs\n", __func__); + set_rflags_to_vmx_fail_invalid(vcpu); + return 1; + } + + switch (vmcs_field_length(vcpu->arch.regs[VCPU_REGS_RDX])) { + case VMCS_FIELD_TYPE_U16: + vcpu->arch.regs[VCPU_REGS_RAX] = + nested_vmcs_read16(vcpu, + vcpu->arch.regs[VCPU_REGS_RDX]); + break; + case VMCS_FIELD_TYPE_U32: + vcpu->arch.regs[VCPU_REGS_RAX] = + nested_vmcs_read32(vcpu, + vcpu->arch.regs[VCPU_REGS_RDX]); + break; + case VMCS_FIELD_TYPE_U64: +#ifdef CONFIG_X86_64 + vcpu->arch.regs[VCPU_REGS_RAX] = + nested_vmcs_read64(vcpu, + vcpu->arch.regs[VCPU_REGS_RDX]); +#else /* nested: 32 bit not actually tested */ + value = nested_vmcs_read64(vcpu, + vcpu->arch.regs[VCPU_REGS_RDX]); + vcpu->arch.regs[VCPU_REGS_RAX] = value; + vcpu->arch.regs[VCPU_REGS_RBX] = value >> 32; +#endif + break; + case VMCS_FIELD_TYPE_ULONG: + vcpu->arch.regs[VCPU_REGS_RAX] = + nested_vmcs_readl(vcpu, + vcpu->arch.regs[VCPU_REGS_RDX]); + break; + default: + printk(KERN_INFO "%s invalid field\n", __func__); + set_rflags_to_vmx_fail_valid(vcpu); + vmcs_write32(VM_INSTRUCTION_ERROR, 12); + nested_unmap_shadow_vmcs(vcpu); + return 1; + } + + clear_rflags_cf_zf(vcpu); + skip_emulated_instruction(vcpu); + nested_unmap_shadow_vmcs(vcpu); + return 1; +} + +static int handle_vmwrite(struct kvm_vcpu *vcpu) +{ +#ifndef CONFIG_X86_64 + u64 value ; +#endif + + if (!nested_vmx_check_permission(vcpu)) + return 1; + + if (!nested_map_shadow_vmcs(vcpu)) { + printk(KERN_INFO "%s invalid shadow vmcs\n", __func__); + set_rflags_to_vmx_fail_invalid(vcpu); + return 1; + } + + switch (vmcs_field_length(vcpu->arch.regs[VCPU_REGS_RDX])) { + case VMCS_FIELD_TYPE_U16: + nested_vmcs_write16(vcpu, vcpu->arch.regs[VCPU_REGS_RDX], + vcpu->arch.regs[VCPU_REGS_RAX]); + break; + case VMCS_FIELD_TYPE_U32: + nested_vmcs_write32(vcpu, vcpu->arch.regs[VCPU_REGS_RDX], + vcpu->arch.regs[VCPU_REGS_RAX]); + break; + case VMCS_FIELD_TYPE_U64: +#ifdef CONFIG_X86_64 + nested_vmcs_write64(vcpu, vcpu->arch.regs[VCPU_REGS_RDX], + vcpu->arch.regs[VCPU_REGS_RAX]); +#else /* nested: 32 bit not actually tested */ + value = vcpu->arch.regs[VCPU_REGS_RAX] | + (vcpu->arch.regs[VCPU_REGS_RBX] << 32); + nested_vmcs_write64(vcpu, + vcpu->arch.regs[VCPU_REGS_RDX], value); +#endif + break; + case VMCS_FIELD_TYPE_ULONG: + nested_vmcs_writel(vcpu, vcpu->arch.regs[VCPU_REGS_RDX], + vcpu->arch.regs[VCPU_REGS_RAX]); + break; + default: + printk(KERN_INFO "%s invalid field\n", __func__); + set_rflags_to_vmx_fail_valid(vcpu); + vmcs_write32(VM_INSTRUCTION_ERROR, 12); + nested_unmap_shadow_vmcs(vcpu); + return 1; + } + + clear_rflags_cf_zf(vcpu); + skip_emulated_instruction(vcpu); + nested_unmap_shadow_vmcs(vcpu); + return 1; +} + static int handle_vmoff(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); @@ -3950,9 +4537,9 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { [EXIT_REASON_VMLAUNCH] = handle_vmx_insn, [EXIT_REASON_VMPTRLD] = handle_vmptrld, [EXIT_REASON_VMPTRST] = handle_vmptrst, - [EXIT_REASON_VMREAD] = handle_vmx_insn, + [EXIT_REASON_VMREAD] = handle_vmread, [EXIT_REASON_VMRESUME] = handle_vmx_insn, - [EXIT_REASON_VMWRITE] = handle_vmx_insn, + [EXIT_REASON_VMWRITE] = handle_vmwrite, [EXIT_REASON_VMOFF] = handle_vmoff, [EXIT_REASON_VMON] = handle_vmon, [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold,