diff options
Diffstat (limited to 'tools/testing/selftests/kvm/lib/x86_64/vmx.c')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/vmx.c | 312 |
1 files changed, 0 insertions, 312 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/vmx.c b/tools/testing/selftests/kvm/lib/x86_64/vmx.c deleted file mode 100644 index 771ba6bf751c..000000000000 --- a/tools/testing/selftests/kvm/lib/x86_64/vmx.c +++ /dev/null @@ -1,312 +0,0 @@ -/* - * tools/testing/selftests/kvm/lib/x86_64/vmx.c - * - * Copyright (C) 2018, Google LLC. - * - * This work is licensed under the terms of the GNU GPL, version 2. - */ - -#define _GNU_SOURCE /* for program_invocation_name */ - -#include "test_util.h" -#include "kvm_util.h" -#include "processor.h" -#include "vmx.h" - -bool enable_evmcs; - -/* Allocate memory regions for nested VMX tests. - * - * Input Args: - * vm - The VM to allocate guest-virtual addresses in. - * - * Output Args: - * p_vmx_gva - The guest virtual address for the struct vmx_pages. - * - * Return: - * Pointer to structure with the addresses of the VMX areas. - */ -struct vmx_pages * -vcpu_alloc_vmx(struct kvm_vm *vm, vm_vaddr_t *p_vmx_gva) -{ - vm_vaddr_t vmx_gva = vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); - struct vmx_pages *vmx = addr_gva2hva(vm, vmx_gva); - - /* Setup of a region of guest memory for the vmxon region. */ - vmx->vmxon = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); - vmx->vmxon_hva = addr_gva2hva(vm, (uintptr_t)vmx->vmxon); - vmx->vmxon_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vmxon); - - /* Setup of a region of guest memory for a vmcs. */ - vmx->vmcs = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); - vmx->vmcs_hva = addr_gva2hva(vm, (uintptr_t)vmx->vmcs); - vmx->vmcs_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vmcs); - - /* Setup of a region of guest memory for the MSR bitmap. */ - vmx->msr = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); - vmx->msr_hva = addr_gva2hva(vm, (uintptr_t)vmx->msr); - vmx->msr_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->msr); - memset(vmx->msr_hva, 0, getpagesize()); - - /* Setup of a region of guest memory for the shadow VMCS. */ - vmx->shadow_vmcs = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); - vmx->shadow_vmcs_hva = addr_gva2hva(vm, (uintptr_t)vmx->shadow_vmcs); - vmx->shadow_vmcs_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->shadow_vmcs); - - /* Setup of a region of guest memory for the VMREAD and VMWRITE bitmaps. */ - vmx->vmread = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); - vmx->vmread_hva = addr_gva2hva(vm, (uintptr_t)vmx->vmread); - vmx->vmread_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vmread); - memset(vmx->vmread_hva, 0, getpagesize()); - - vmx->vmwrite = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); - vmx->vmwrite_hva = addr_gva2hva(vm, (uintptr_t)vmx->vmwrite); - vmx->vmwrite_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vmwrite); - memset(vmx->vmwrite_hva, 0, getpagesize()); - - /* Setup of a region of guest memory for the VP Assist page. */ - vmx->vp_assist = (void *)vm_vaddr_alloc(vm, getpagesize(), - 0x10000, 0, 0); - vmx->vp_assist_hva = addr_gva2hva(vm, (uintptr_t)vmx->vp_assist); - vmx->vp_assist_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->vp_assist); - - /* Setup of a region of guest memory for the enlightened VMCS. */ - vmx->enlightened_vmcs = (void *)vm_vaddr_alloc(vm, getpagesize(), - 0x10000, 0, 0); - vmx->enlightened_vmcs_hva = - addr_gva2hva(vm, (uintptr_t)vmx->enlightened_vmcs); - vmx->enlightened_vmcs_gpa = - addr_gva2gpa(vm, (uintptr_t)vmx->enlightened_vmcs); - - *p_vmx_gva = vmx_gva; - return vmx; -} - -bool prepare_for_vmx_operation(struct vmx_pages *vmx) -{ - uint64_t feature_control; - uint64_t required; - unsigned long cr0; - unsigned long cr4; - - /* - * Ensure bits in CR0 and CR4 are valid in VMX operation: - * - Bit X is 1 in _FIXED0: bit X is fixed to 1 in CRx. - * - Bit X is 0 in _FIXED1: bit X is fixed to 0 in CRx. - */ - __asm__ __volatile__("mov %%cr0, %0" : "=r"(cr0) : : "memory"); - cr0 &= rdmsr(MSR_IA32_VMX_CR0_FIXED1); - cr0 |= rdmsr(MSR_IA32_VMX_CR0_FIXED0); - __asm__ __volatile__("mov %0, %%cr0" : : "r"(cr0) : "memory"); - - __asm__ __volatile__("mov %%cr4, %0" : "=r"(cr4) : : "memory"); - cr4 &= rdmsr(MSR_IA32_VMX_CR4_FIXED1); - cr4 |= rdmsr(MSR_IA32_VMX_CR4_FIXED0); - /* Enable VMX operation */ - cr4 |= X86_CR4_VMXE; - __asm__ __volatile__("mov %0, %%cr4" : : "r"(cr4) : "memory"); - - /* - * Configure IA32_FEATURE_CONTROL MSR to allow VMXON: - * Bit 0: Lock bit. If clear, VMXON causes a #GP. - * Bit 2: Enables VMXON outside of SMX operation. If clear, VMXON - * outside of SMX causes a #GP. - */ - required = FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX; - required |= FEATURE_CONTROL_LOCKED; - feature_control = rdmsr(MSR_IA32_FEATURE_CONTROL); - if ((feature_control & required) != required) - wrmsr(MSR_IA32_FEATURE_CONTROL, feature_control | required); - - /* Enter VMX root operation. */ - *(uint32_t *)(vmx->vmxon) = vmcs_revision(); - if (vmxon(vmx->vmxon_gpa)) - return false; - - return true; -} - -bool load_vmcs(struct vmx_pages *vmx) -{ - if (!enable_evmcs) { - /* Load a VMCS. */ - *(uint32_t *)(vmx->vmcs) = vmcs_revision(); - if (vmclear(vmx->vmcs_gpa)) - return false; - - if (vmptrld(vmx->vmcs_gpa)) - return false; - - /* Setup shadow VMCS, do not load it yet. */ - *(uint32_t *)(vmx->shadow_vmcs) = - vmcs_revision() | 0x80000000ul; - if (vmclear(vmx->shadow_vmcs_gpa)) - return false; - } else { - if (evmcs_vmptrld(vmx->enlightened_vmcs_gpa, - vmx->enlightened_vmcs)) - return false; - current_evmcs->revision_id = vmcs_revision(); - } - - return true; -} - -/* - * Initialize the control fields to the most basic settings possible. - */ -static inline void init_vmcs_control_fields(struct vmx_pages *vmx) -{ - vmwrite(VIRTUAL_PROCESSOR_ID, 0); - vmwrite(POSTED_INTR_NV, 0); - - vmwrite(PIN_BASED_VM_EXEC_CONTROL, rdmsr(MSR_IA32_VMX_TRUE_PINBASED_CTLS)); - if (!vmwrite(SECONDARY_VM_EXEC_CONTROL, 0)) - vmwrite(CPU_BASED_VM_EXEC_CONTROL, - rdmsr(MSR_IA32_VMX_TRUE_PROCBASED_CTLS) | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS); - else - vmwrite(CPU_BASED_VM_EXEC_CONTROL, rdmsr(MSR_IA32_VMX_TRUE_PROCBASED_CTLS)); - vmwrite(EXCEPTION_BITMAP, 0); - vmwrite(PAGE_FAULT_ERROR_CODE_MASK, 0); - vmwrite(PAGE_FAULT_ERROR_CODE_MATCH, -1); /* Never match */ - vmwrite(CR3_TARGET_COUNT, 0); - vmwrite(VM_EXIT_CONTROLS, rdmsr(MSR_IA32_VMX_EXIT_CTLS) | - VM_EXIT_HOST_ADDR_SPACE_SIZE); /* 64-bit host */ - vmwrite(VM_EXIT_MSR_STORE_COUNT, 0); - vmwrite(VM_EXIT_MSR_LOAD_COUNT, 0); - vmwrite(VM_ENTRY_CONTROLS, rdmsr(MSR_IA32_VMX_ENTRY_CTLS) | - VM_ENTRY_IA32E_MODE); /* 64-bit guest */ - vmwrite(VM_ENTRY_MSR_LOAD_COUNT, 0); - vmwrite(VM_ENTRY_INTR_INFO_FIELD, 0); - vmwrite(TPR_THRESHOLD, 0); - - vmwrite(CR0_GUEST_HOST_MASK, 0); - vmwrite(CR4_GUEST_HOST_MASK, 0); - vmwrite(CR0_READ_SHADOW, get_cr0()); - vmwrite(CR4_READ_SHADOW, get_cr4()); - - vmwrite(MSR_BITMAP, vmx->msr_gpa); - vmwrite(VMREAD_BITMAP, vmx->vmread_gpa); - vmwrite(VMWRITE_BITMAP, vmx->vmwrite_gpa); -} - -/* - * Initialize the host state fields based on the current host state, with - * the exception of HOST_RSP and HOST_RIP, which should be set by vmlaunch - * or vmresume. - */ -static inline void init_vmcs_host_state(void) -{ - uint32_t exit_controls = vmreadz(VM_EXIT_CONTROLS); - - vmwrite(HOST_ES_SELECTOR, get_es()); - vmwrite(HOST_CS_SELECTOR, get_cs()); - vmwrite(HOST_SS_SELECTOR, get_ss()); - vmwrite(HOST_DS_SELECTOR, get_ds()); - vmwrite(HOST_FS_SELECTOR, get_fs()); - vmwrite(HOST_GS_SELECTOR, get_gs()); - vmwrite(HOST_TR_SELECTOR, get_tr()); - - if (exit_controls & VM_EXIT_LOAD_IA32_PAT) - vmwrite(HOST_IA32_PAT, rdmsr(MSR_IA32_CR_PAT)); - if (exit_controls & VM_EXIT_LOAD_IA32_EFER) - vmwrite(HOST_IA32_EFER, rdmsr(MSR_EFER)); - if (exit_controls & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL) - vmwrite(HOST_IA32_PERF_GLOBAL_CTRL, - rdmsr(MSR_CORE_PERF_GLOBAL_CTRL)); - - vmwrite(HOST_IA32_SYSENTER_CS, rdmsr(MSR_IA32_SYSENTER_CS)); - - vmwrite(HOST_CR0, get_cr0()); - vmwrite(HOST_CR3, get_cr3()); - vmwrite(HOST_CR4, get_cr4()); - vmwrite(HOST_FS_BASE, rdmsr(MSR_FS_BASE)); - vmwrite(HOST_GS_BASE, rdmsr(MSR_GS_BASE)); - vmwrite(HOST_TR_BASE, - get_desc64_base((struct desc64 *)(get_gdt_base() + get_tr()))); - vmwrite(HOST_GDTR_BASE, get_gdt_base()); - vmwrite(HOST_IDTR_BASE, get_idt_base()); - vmwrite(HOST_IA32_SYSENTER_ESP, rdmsr(MSR_IA32_SYSENTER_ESP)); - vmwrite(HOST_IA32_SYSENTER_EIP, rdmsr(MSR_IA32_SYSENTER_EIP)); -} - -/* - * Initialize the guest state fields essentially as a clone of - * the host state fields. Some host state fields have fixed - * values, and we set the corresponding guest state fields accordingly. - */ -static inline void init_vmcs_guest_state(void *rip, void *rsp) -{ - vmwrite(GUEST_ES_SELECTOR, vmreadz(HOST_ES_SELECTOR)); - vmwrite(GUEST_CS_SELECTOR, vmreadz(HOST_CS_SELECTOR)); - vmwrite(GUEST_SS_SELECTOR, vmreadz(HOST_SS_SELECTOR)); - vmwrite(GUEST_DS_SELECTOR, vmreadz(HOST_DS_SELECTOR)); - vmwrite(GUEST_FS_SELECTOR, vmreadz(HOST_FS_SELECTOR)); - vmwrite(GUEST_GS_SELECTOR, vmreadz(HOST_GS_SELECTOR)); - vmwrite(GUEST_LDTR_SELECTOR, 0); - vmwrite(GUEST_TR_SELECTOR, vmreadz(HOST_TR_SELECTOR)); - vmwrite(GUEST_INTR_STATUS, 0); - vmwrite(GUEST_PML_INDEX, 0); - - vmwrite(VMCS_LINK_POINTER, -1ll); - vmwrite(GUEST_IA32_DEBUGCTL, 0); - vmwrite(GUEST_IA32_PAT, vmreadz(HOST_IA32_PAT)); - vmwrite(GUEST_IA32_EFER, vmreadz(HOST_IA32_EFER)); - vmwrite(GUEST_IA32_PERF_GLOBAL_CTRL, - vmreadz(HOST_IA32_PERF_GLOBAL_CTRL)); - - vmwrite(GUEST_ES_LIMIT, -1); - vmwrite(GUEST_CS_LIMIT, -1); - vmwrite(GUEST_SS_LIMIT, -1); - vmwrite(GUEST_DS_LIMIT, -1); - vmwrite(GUEST_FS_LIMIT, -1); - vmwrite(GUEST_GS_LIMIT, -1); - vmwrite(GUEST_LDTR_LIMIT, -1); - vmwrite(GUEST_TR_LIMIT, 0x67); - vmwrite(GUEST_GDTR_LIMIT, 0xffff); - vmwrite(GUEST_IDTR_LIMIT, 0xffff); - vmwrite(GUEST_ES_AR_BYTES, - vmreadz(GUEST_ES_SELECTOR) == 0 ? 0x10000 : 0xc093); - vmwrite(GUEST_CS_AR_BYTES, 0xa09b); - vmwrite(GUEST_SS_AR_BYTES, 0xc093); - vmwrite(GUEST_DS_AR_BYTES, - vmreadz(GUEST_DS_SELECTOR) == 0 ? 0x10000 : 0xc093); - vmwrite(GUEST_FS_AR_BYTES, - vmreadz(GUEST_FS_SELECTOR) == 0 ? 0x10000 : 0xc093); - vmwrite(GUEST_GS_AR_BYTES, - vmreadz(GUEST_GS_SELECTOR) == 0 ? 0x10000 : 0xc093); - vmwrite(GUEST_LDTR_AR_BYTES, 0x10000); - vmwrite(GUEST_TR_AR_BYTES, 0x8b); - vmwrite(GUEST_INTERRUPTIBILITY_INFO, 0); - vmwrite(GUEST_ACTIVITY_STATE, 0); - vmwrite(GUEST_SYSENTER_CS, vmreadz(HOST_IA32_SYSENTER_CS)); - vmwrite(VMX_PREEMPTION_TIMER_VALUE, 0); - - vmwrite(GUEST_CR0, vmreadz(HOST_CR0)); - vmwrite(GUEST_CR3, vmreadz(HOST_CR3)); - vmwrite(GUEST_CR4, vmreadz(HOST_CR4)); - vmwrite(GUEST_ES_BASE, 0); - vmwrite(GUEST_CS_BASE, 0); - vmwrite(GUEST_SS_BASE, 0); - vmwrite(GUEST_DS_BASE, 0); - vmwrite(GUEST_FS_BASE, vmreadz(HOST_FS_BASE)); - vmwrite(GUEST_GS_BASE, vmreadz(HOST_GS_BASE)); - vmwrite(GUEST_LDTR_BASE, 0); - vmwrite(GUEST_TR_BASE, vmreadz(HOST_TR_BASE)); - vmwrite(GUEST_GDTR_BASE, vmreadz(HOST_GDTR_BASE)); - vmwrite(GUEST_IDTR_BASE, vmreadz(HOST_IDTR_BASE)); - vmwrite(GUEST_DR7, 0x400); - vmwrite(GUEST_RSP, (uint64_t)rsp); - vmwrite(GUEST_RIP, (uint64_t)rip); - vmwrite(GUEST_RFLAGS, 2); - vmwrite(GUEST_PENDING_DBG_EXCEPTIONS, 0); - vmwrite(GUEST_SYSENTER_ESP, vmreadz(HOST_IA32_SYSENTER_ESP)); - vmwrite(GUEST_SYSENTER_EIP, vmreadz(HOST_IA32_SYSENTER_EIP)); -} - -void prepare_vmcs(struct vmx_pages *vmx, void *guest_rip, void *guest_rsp) -{ - init_vmcs_control_fields(vmx); - init_vmcs_host_state(); - init_vmcs_guest_state(guest_rip, guest_rsp); -} |