diff options
Diffstat (limited to 'tools/testing/selftests/kvm/lib/x86_64')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/processor.c | 1120 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/svm.c | 165 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/ucall.c | 56 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/vmx.c | 544 |
4 files changed, 0 insertions, 1885 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c deleted file mode 100644 index f6eb34eaa0d2..000000000000 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ /dev/null @@ -1,1120 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * tools/testing/selftests/kvm/lib/x86_64/processor.c - * - * Copyright (C) 2018, Google LLC. - */ - -#define _GNU_SOURCE /* for program_invocation_name */ - -#include "test_util.h" -#include "kvm_util.h" -#include "../kvm_util_internal.h" -#include "processor.h" - -/* Minimum physical address used for virtual translation tables. */ -#define KVM_GUEST_PAGE_TABLE_MIN_PADDR 0x180000 - -/* Virtual translation table structure declarations */ -struct pageMapL4Entry { - uint64_t present:1; - uint64_t writable:1; - uint64_t user:1; - uint64_t write_through:1; - uint64_t cache_disable:1; - uint64_t accessed:1; - uint64_t ignored_06:1; - uint64_t page_size:1; - uint64_t ignored_11_08:4; - uint64_t address:40; - uint64_t ignored_62_52:11; - uint64_t execute_disable:1; -}; - -struct pageDirectoryPointerEntry { - uint64_t present:1; - uint64_t writable:1; - uint64_t user:1; - uint64_t write_through:1; - uint64_t cache_disable:1; - uint64_t accessed:1; - uint64_t ignored_06:1; - uint64_t page_size:1; - uint64_t ignored_11_08:4; - uint64_t address:40; - uint64_t ignored_62_52:11; - uint64_t execute_disable:1; -}; - -struct pageDirectoryEntry { - uint64_t present:1; - uint64_t writable:1; - uint64_t user:1; - uint64_t write_through:1; - uint64_t cache_disable:1; - uint64_t accessed:1; - uint64_t ignored_06:1; - uint64_t page_size:1; - uint64_t ignored_11_08:4; - uint64_t address:40; - uint64_t ignored_62_52:11; - uint64_t execute_disable:1; -}; - -struct pageTableEntry { - uint64_t present:1; - uint64_t writable:1; - uint64_t user:1; - uint64_t write_through:1; - uint64_t cache_disable:1; - uint64_t accessed:1; - uint64_t dirty:1; - uint64_t reserved_07:1; - uint64_t global:1; - uint64_t ignored_11_09:3; - uint64_t address:40; - uint64_t ignored_62_52:11; - uint64_t execute_disable:1; -}; - -void regs_dump(FILE *stream, struct kvm_regs *regs, - uint8_t indent) -{ - fprintf(stream, "%*srax: 0x%.16llx rbx: 0x%.16llx " - "rcx: 0x%.16llx rdx: 0x%.16llx\n", - indent, "", - regs->rax, regs->rbx, regs->rcx, regs->rdx); - fprintf(stream, "%*srsi: 0x%.16llx rdi: 0x%.16llx " - "rsp: 0x%.16llx rbp: 0x%.16llx\n", - indent, "", - regs->rsi, regs->rdi, regs->rsp, regs->rbp); - fprintf(stream, "%*sr8: 0x%.16llx r9: 0x%.16llx " - "r10: 0x%.16llx r11: 0x%.16llx\n", - indent, "", - regs->r8, regs->r9, regs->r10, regs->r11); - fprintf(stream, "%*sr12: 0x%.16llx r13: 0x%.16llx " - "r14: 0x%.16llx r15: 0x%.16llx\n", - indent, "", - regs->r12, regs->r13, regs->r14, regs->r15); - fprintf(stream, "%*srip: 0x%.16llx rfl: 0x%.16llx\n", - indent, "", - regs->rip, regs->rflags); -} - -/* - * Segment Dump - * - * Input Args: - * stream - Output FILE stream - * segment - KVM segment - * indent - Left margin indent amount - * - * Output Args: None - * - * Return: None - * - * Dumps the state of the KVM segment given by @segment, to the FILE stream - * given by @stream. - */ -static void segment_dump(FILE *stream, struct kvm_segment *segment, - uint8_t indent) -{ - fprintf(stream, "%*sbase: 0x%.16llx limit: 0x%.8x " - "selector: 0x%.4x type: 0x%.2x\n", - indent, "", segment->base, segment->limit, - segment->selector, segment->type); - fprintf(stream, "%*spresent: 0x%.2x dpl: 0x%.2x " - "db: 0x%.2x s: 0x%.2x l: 0x%.2x\n", - indent, "", segment->present, segment->dpl, - segment->db, segment->s, segment->l); - fprintf(stream, "%*sg: 0x%.2x avl: 0x%.2x " - "unusable: 0x%.2x padding: 0x%.2x\n", - indent, "", segment->g, segment->avl, - segment->unusable, segment->padding); -} - -/* - * dtable Dump - * - * Input Args: - * stream - Output FILE stream - * dtable - KVM dtable - * indent - Left margin indent amount - * - * Output Args: None - * - * Return: None - * - * Dumps the state of the KVM dtable given by @dtable, to the FILE stream - * given by @stream. - */ -static void dtable_dump(FILE *stream, struct kvm_dtable *dtable, - uint8_t indent) -{ - fprintf(stream, "%*sbase: 0x%.16llx limit: 0x%.4x " - "padding: 0x%.4x 0x%.4x 0x%.4x\n", - indent, "", dtable->base, dtable->limit, - dtable->padding[0], dtable->padding[1], dtable->padding[2]); -} - -void sregs_dump(FILE *stream, struct kvm_sregs *sregs, - uint8_t indent) -{ - unsigned int i; - - fprintf(stream, "%*scs:\n", indent, ""); - segment_dump(stream, &sregs->cs, indent + 2); - fprintf(stream, "%*sds:\n", indent, ""); - segment_dump(stream, &sregs->ds, indent + 2); - fprintf(stream, "%*ses:\n", indent, ""); - segment_dump(stream, &sregs->es, indent + 2); - fprintf(stream, "%*sfs:\n", indent, ""); - segment_dump(stream, &sregs->fs, indent + 2); - fprintf(stream, "%*sgs:\n", indent, ""); - segment_dump(stream, &sregs->gs, indent + 2); - fprintf(stream, "%*sss:\n", indent, ""); - segment_dump(stream, &sregs->ss, indent + 2); - fprintf(stream, "%*str:\n", indent, ""); - segment_dump(stream, &sregs->tr, indent + 2); - fprintf(stream, "%*sldt:\n", indent, ""); - segment_dump(stream, &sregs->ldt, indent + 2); - - fprintf(stream, "%*sgdt:\n", indent, ""); - dtable_dump(stream, &sregs->gdt, indent + 2); - fprintf(stream, "%*sidt:\n", indent, ""); - dtable_dump(stream, &sregs->idt, indent + 2); - - fprintf(stream, "%*scr0: 0x%.16llx cr2: 0x%.16llx " - "cr3: 0x%.16llx cr4: 0x%.16llx\n", - indent, "", - sregs->cr0, sregs->cr2, sregs->cr3, sregs->cr4); - fprintf(stream, "%*scr8: 0x%.16llx efer: 0x%.16llx " - "apic_base: 0x%.16llx\n", - indent, "", - sregs->cr8, sregs->efer, sregs->apic_base); - - fprintf(stream, "%*sinterrupt_bitmap:\n", indent, ""); - for (i = 0; i < (KVM_NR_INTERRUPTS + 63) / 64; i++) { - fprintf(stream, "%*s%.16llx\n", indent + 2, "", - sregs->interrupt_bitmap[i]); - } -} - -void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot) -{ - TEST_ASSERT(vm->mode == VM_MODE_PXXV48_4K, "Attempt to use " - "unknown or unsupported guest mode, mode: 0x%x", vm->mode); - - /* If needed, create page map l4 table. */ - if (!vm->pgd_created) { - vm_paddr_t paddr = vm_phy_page_alloc(vm, - KVM_GUEST_PAGE_TABLE_MIN_PADDR, pgd_memslot); - vm->pgd = paddr; - vm->pgd_created = true; - } -} - -void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, - uint32_t pgd_memslot) -{ - uint16_t index[4]; - struct pageMapL4Entry *pml4e; - - TEST_ASSERT(vm->mode == VM_MODE_PXXV48_4K, "Attempt to use " - "unknown or unsupported guest mode, mode: 0x%x", vm->mode); - - TEST_ASSERT((vaddr % vm->page_size) == 0, - "Virtual address not on page boundary,\n" - " vaddr: 0x%lx vm->page_size: 0x%x", - vaddr, vm->page_size); - TEST_ASSERT(sparsebit_is_set(vm->vpages_valid, - (vaddr >> vm->page_shift)), - "Invalid virtual address, vaddr: 0x%lx", - vaddr); - TEST_ASSERT((paddr % vm->page_size) == 0, - "Physical address not on page boundary,\n" - " paddr: 0x%lx vm->page_size: 0x%x", - paddr, vm->page_size); - TEST_ASSERT((paddr >> vm->page_shift) <= vm->max_gfn, - "Physical address beyond beyond maximum supported,\n" - " paddr: 0x%lx vm->max_gfn: 0x%lx vm->page_size: 0x%x", - paddr, vm->max_gfn, vm->page_size); - - index[0] = (vaddr >> 12) & 0x1ffu; - index[1] = (vaddr >> 21) & 0x1ffu; - index[2] = (vaddr >> 30) & 0x1ffu; - index[3] = (vaddr >> 39) & 0x1ffu; - - /* Allocate page directory pointer table if not present. */ - pml4e = addr_gpa2hva(vm, vm->pgd); - if (!pml4e[index[3]].present) { - pml4e[index[3]].address = vm_phy_page_alloc(vm, - KVM_GUEST_PAGE_TABLE_MIN_PADDR, pgd_memslot) - >> vm->page_shift; - pml4e[index[3]].writable = true; - pml4e[index[3]].present = true; - } - - /* Allocate page directory table if not present. */ - struct pageDirectoryPointerEntry *pdpe; - pdpe = addr_gpa2hva(vm, pml4e[index[3]].address * vm->page_size); - if (!pdpe[index[2]].present) { - pdpe[index[2]].address = vm_phy_page_alloc(vm, - KVM_GUEST_PAGE_TABLE_MIN_PADDR, pgd_memslot) - >> vm->page_shift; - pdpe[index[2]].writable = true; - pdpe[index[2]].present = true; - } - - /* Allocate page table if not present. */ - struct pageDirectoryEntry *pde; - pde = addr_gpa2hva(vm, pdpe[index[2]].address * vm->page_size); - if (!pde[index[1]].present) { - pde[index[1]].address = vm_phy_page_alloc(vm, - KVM_GUEST_PAGE_TABLE_MIN_PADDR, pgd_memslot) - >> vm->page_shift; - pde[index[1]].writable = true; - pde[index[1]].present = true; - } - - /* Fill in page table entry. */ - struct pageTableEntry *pte; - pte = addr_gpa2hva(vm, pde[index[1]].address * vm->page_size); - pte[index[0]].address = paddr >> vm->page_shift; - pte[index[0]].writable = true; - pte[index[0]].present = 1; -} - -void virt_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent) -{ - struct pageMapL4Entry *pml4e, *pml4e_start; - struct pageDirectoryPointerEntry *pdpe, *pdpe_start; - struct pageDirectoryEntry *pde, *pde_start; - struct pageTableEntry *pte, *pte_start; - - if (!vm->pgd_created) - return; - - fprintf(stream, "%*s " - " no\n", indent, ""); - fprintf(stream, "%*s index hvaddr gpaddr " - "addr w exec dirty\n", - indent, ""); - pml4e_start = (struct pageMapL4Entry *) addr_gpa2hva(vm, - vm->pgd); - for (uint16_t n1 = 0; n1 <= 0x1ffu; n1++) { - pml4e = &pml4e_start[n1]; - if (!pml4e->present) - continue; - fprintf(stream, "%*spml4e 0x%-3zx %p 0x%-12lx 0x%-10lx %u " - " %u\n", - indent, "", - pml4e - pml4e_start, pml4e, - addr_hva2gpa(vm, pml4e), (uint64_t) pml4e->address, - pml4e->writable, pml4e->execute_disable); - - pdpe_start = addr_gpa2hva(vm, pml4e->address - * vm->page_size); - for (uint16_t n2 = 0; n2 <= 0x1ffu; n2++) { - pdpe = &pdpe_start[n2]; - if (!pdpe->present) - continue; - fprintf(stream, "%*spdpe 0x%-3zx %p 0x%-12lx 0x%-10lx " - "%u %u\n", - indent, "", - pdpe - pdpe_start, pdpe, - addr_hva2gpa(vm, pdpe), - (uint64_t) pdpe->address, pdpe->writable, - pdpe->execute_disable); - - pde_start = addr_gpa2hva(vm, - pdpe->address * vm->page_size); - for (uint16_t n3 = 0; n3 <= 0x1ffu; n3++) { - pde = &pde_start[n3]; - if (!pde->present) - continue; - fprintf(stream, "%*spde 0x%-3zx %p " - "0x%-12lx 0x%-10lx %u %u\n", - indent, "", pde - pde_start, pde, - addr_hva2gpa(vm, pde), - (uint64_t) pde->address, pde->writable, - pde->execute_disable); - - pte_start = addr_gpa2hva(vm, - pde->address * vm->page_size); - for (uint16_t n4 = 0; n4 <= 0x1ffu; n4++) { - pte = &pte_start[n4]; - if (!pte->present) - continue; - fprintf(stream, "%*spte 0x%-3zx %p " - "0x%-12lx 0x%-10lx %u %u " - " %u 0x%-10lx\n", - indent, "", - pte - pte_start, pte, - addr_hva2gpa(vm, pte), - (uint64_t) pte->address, - pte->writable, - pte->execute_disable, - pte->dirty, - ((uint64_t) n1 << 27) - | ((uint64_t) n2 << 18) - | ((uint64_t) n3 << 9) - | ((uint64_t) n4)); - } - } - } - } -} - -/* - * Set Unusable Segment - * - * Input Args: None - * - * Output Args: - * segp - Pointer to segment register - * - * Return: None - * - * Sets the segment register pointed to by @segp to an unusable state. - */ -static void kvm_seg_set_unusable(struct kvm_segment *segp) -{ - memset(segp, 0, sizeof(*segp)); - segp->unusable = true; -} - -static void kvm_seg_fill_gdt_64bit(struct kvm_vm *vm, struct kvm_segment *segp) -{ - void *gdt = addr_gva2hva(vm, vm->gdt); - struct desc64 *desc = gdt + (segp->selector >> 3) * 8; - - desc->limit0 = segp->limit & 0xFFFF; - desc->base0 = segp->base & 0xFFFF; - desc->base1 = segp->base >> 16; - desc->s = segp->s; - desc->type = segp->type; - desc->dpl = segp->dpl; - desc->p = segp->present; - desc->limit1 = segp->limit >> 16; - desc->l = segp->l; - desc->db = segp->db; - desc->g = segp->g; - desc->base2 = segp->base >> 24; - if (!segp->s) - desc->base3 = segp->base >> 32; -} - - -/* - * Set Long Mode Flat Kernel Code Segment - * - * Input Args: - * vm - VM whose GDT is being filled, or NULL to only write segp - * selector - selector value - * - * Output Args: - * segp - Pointer to KVM segment - * - * Return: None - * - * Sets up the KVM segment pointed to by @segp, to be a code segment - * with the selector value given by @selector. - */ -static void kvm_seg_set_kernel_code_64bit(struct kvm_vm *vm, uint16_t selector, - struct kvm_segment *segp) -{ - memset(segp, 0, sizeof(*segp)); - segp->selector = selector; - segp->limit = 0xFFFFFFFFu; - segp->s = 0x1; /* kTypeCodeData */ - segp->type = 0x08 | 0x01 | 0x02; /* kFlagCode | kFlagCodeAccessed - * | kFlagCodeReadable - */ - segp->g = true; - segp->l = true; - segp->present = 1; - if (vm) - kvm_seg_fill_gdt_64bit(vm, segp); -} - -/* - * Set Long Mode Flat Kernel Data Segment - * - * Input Args: - * vm - VM whose GDT is being filled, or NULL to only write segp - * selector - selector value - * - * Output Args: - * segp - Pointer to KVM segment - * - * Return: None - * - * Sets up the KVM segment pointed to by @segp, to be a data segment - * with the selector value given by @selector. - */ -static void kvm_seg_set_kernel_data_64bit(struct kvm_vm *vm, uint16_t selector, - struct kvm_segment *segp) -{ - memset(segp, 0, sizeof(*segp)); - segp->selector = selector; - segp->limit = 0xFFFFFFFFu; - segp->s = 0x1; /* kTypeCodeData */ - segp->type = 0x00 | 0x01 | 0x02; /* kFlagData | kFlagDataAccessed - * | kFlagDataWritable - */ - segp->g = true; - segp->present = true; - if (vm) - kvm_seg_fill_gdt_64bit(vm, segp); -} - -vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva) -{ - uint16_t index[4]; - struct pageMapL4Entry *pml4e; - struct pageDirectoryPointerEntry *pdpe; - struct pageDirectoryEntry *pde; - struct pageTableEntry *pte; - - TEST_ASSERT(vm->mode == VM_MODE_PXXV48_4K, "Attempt to use " - "unknown or unsupported guest mode, mode: 0x%x", vm->mode); - - index[0] = (gva >> 12) & 0x1ffu; - index[1] = (gva >> 21) & 0x1ffu; - index[2] = (gva >> 30) & 0x1ffu; - index[3] = (gva >> 39) & 0x1ffu; - - if (!vm->pgd_created) - goto unmapped_gva; - pml4e = addr_gpa2hva(vm, vm->pgd); - if (!pml4e[index[3]].present) - goto unmapped_gva; - - pdpe = addr_gpa2hva(vm, pml4e[index[3]].address * vm->page_size); - if (!pdpe[index[2]].present) - goto unmapped_gva; - - pde = addr_gpa2hva(vm, pdpe[index[2]].address * vm->page_size); - if (!pde[index[1]].present) - goto unmapped_gva; - - pte = addr_gpa2hva(vm, pde[index[1]].address * vm->page_size); - if (!pte[index[0]].present) - goto unmapped_gva; - - return (pte[index[0]].address * vm->page_size) + (gva & 0xfffu); - -unmapped_gva: - TEST_FAIL("No mapping for vm virtual address, gva: 0x%lx", gva); - exit(EXIT_FAILURE); -} - -static void kvm_setup_gdt(struct kvm_vm *vm, struct kvm_dtable *dt, int gdt_memslot, - int pgd_memslot) -{ - if (!vm->gdt) - vm->gdt = vm_vaddr_alloc(vm, getpagesize(), - KVM_UTIL_MIN_VADDR, gdt_memslot, pgd_memslot); - - dt->base = vm->gdt; - dt->limit = getpagesize(); -} - -static void kvm_setup_tss_64bit(struct kvm_vm *vm, struct kvm_segment *segp, - int selector, int gdt_memslot, - int pgd_memslot) -{ - if (!vm->tss) - vm->tss = vm_vaddr_alloc(vm, getpagesize(), - KVM_UTIL_MIN_VADDR, gdt_memslot, pgd_memslot); - - memset(segp, 0, sizeof(*segp)); - segp->base = vm->tss; - segp->limit = 0x67; - segp->selector = selector; - segp->type = 0xb; - segp->present = 1; - kvm_seg_fill_gdt_64bit(vm, segp); -} - -static void vcpu_setup(struct kvm_vm *vm, int vcpuid, int pgd_memslot, int gdt_memslot) -{ - struct kvm_sregs sregs; - - /* Set mode specific system register values. */ - vcpu_sregs_get(vm, vcpuid, &sregs); - - sregs.idt.limit = 0; - - kvm_setup_gdt(vm, &sregs.gdt, gdt_memslot, pgd_memslot); - - switch (vm->mode) { - case VM_MODE_PXXV48_4K: - sregs.cr0 = X86_CR0_PE | X86_CR0_NE | X86_CR0_PG; - sregs.cr4 |= X86_CR4_PAE | X86_CR4_OSFXSR; - sregs.efer |= (EFER_LME | EFER_LMA | EFER_NX); - - kvm_seg_set_unusable(&sregs.ldt); - kvm_seg_set_kernel_code_64bit(vm, 0x8, &sregs.cs); - kvm_seg_set_kernel_data_64bit(vm, 0x10, &sregs.ds); - kvm_seg_set_kernel_data_64bit(vm, 0x10, &sregs.es); - kvm_setup_tss_64bit(vm, &sregs.tr, 0x18, gdt_memslot, pgd_memslot); - break; - - default: - TEST_FAIL("Unknown guest mode, mode: 0x%x", vm->mode); - } - - sregs.cr3 = vm->pgd; - vcpu_sregs_set(vm, vcpuid, &sregs); -} - -void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code) -{ - struct kvm_mp_state mp_state; - struct kvm_regs regs; - vm_vaddr_t stack_vaddr; - stack_vaddr = vm_vaddr_alloc(vm, DEFAULT_STACK_PGS * getpagesize(), - DEFAULT_GUEST_STACK_VADDR_MIN, 0, 0); - - /* Create VCPU */ - vm_vcpu_add(vm, vcpuid); - vcpu_setup(vm, vcpuid, 0, 0); - - /* Setup guest general purpose registers */ - vcpu_regs_get(vm, vcpuid, ®s); - regs.rflags = regs.rflags | 0x2; - regs.rsp = stack_vaddr + (DEFAULT_STACK_PGS * getpagesize()); - regs.rip = (unsigned long) guest_code; - vcpu_regs_set(vm, vcpuid, ®s); - - /* Setup the MP state */ - mp_state.mp_state = 0; - vcpu_set_mp_state(vm, vcpuid, &mp_state); -} - -/* - * Allocate an instance of struct kvm_cpuid2 - * - * Input Args: None - * - * Output Args: None - * - * Return: A pointer to the allocated struct. The caller is responsible - * for freeing this struct. - * - * Since kvm_cpuid2 uses a 0-length array to allow a the size of the - * array to be decided at allocation time, allocation is slightly - * complicated. This function uses a reasonable default length for - * the array and performs the appropriate allocation. - */ -static struct kvm_cpuid2 *allocate_kvm_cpuid2(void) -{ - struct kvm_cpuid2 *cpuid; - int nent = 100; - size_t size; - - size = sizeof(*cpuid); - size += nent * sizeof(struct kvm_cpuid_entry2); - cpuid = malloc(size); - if (!cpuid) { - perror("malloc"); - abort(); - } - - cpuid->nent = nent; - - return cpuid; -} - -/* - * KVM Supported CPUID Get - * - * Input Args: None - * - * Output Args: - * - * Return: The supported KVM CPUID - * - * Get the guest CPUID supported by KVM. - */ -struct kvm_cpuid2 *kvm_get_supported_cpuid(void) -{ - static struct kvm_cpuid2 *cpuid; - int ret; - int kvm_fd; - - if (cpuid) - return cpuid; - - cpuid = allocate_kvm_cpuid2(); - kvm_fd = open(KVM_DEV_PATH, O_RDONLY); - if (kvm_fd < 0) - exit(KSFT_SKIP); - - ret = ioctl(kvm_fd, KVM_GET_SUPPORTED_CPUID, cpuid); - TEST_ASSERT(ret == 0, "KVM_GET_SUPPORTED_CPUID failed %d %d\n", - ret, errno); - - close(kvm_fd); - return cpuid; -} - -/* - * Locate a cpuid entry. - * - * Input Args: - * function: The function of the cpuid entry to find. - * index: The index of the cpuid entry. - * - * Output Args: None - * - * Return: A pointer to the cpuid entry. Never returns NULL. - */ -struct kvm_cpuid_entry2 * -kvm_get_supported_cpuid_index(uint32_t function, uint32_t index) -{ - struct kvm_cpuid2 *cpuid; - struct kvm_cpuid_entry2 *entry = NULL; - int i; - - cpuid = kvm_get_supported_cpuid(); - for (i = 0; i < cpuid->nent; i++) { - if (cpuid->entries[i].function == function && - cpuid->entries[i].index == index) { - entry = &cpuid->entries[i]; - break; - } - } - - TEST_ASSERT(entry, "Guest CPUID entry not found: (EAX=%x, ECX=%x).", - function, index); - return entry; -} - -/* - * VM VCPU CPUID Set - * - * Input Args: - * vm - Virtual Machine - * vcpuid - VCPU id - * cpuid - The CPUID values to set. - * - * Output Args: None - * - * Return: void - * - * Set the VCPU's CPUID. - */ -void vcpu_set_cpuid(struct kvm_vm *vm, - uint32_t vcpuid, struct kvm_cpuid2 *cpuid) -{ - struct vcpu *vcpu = vcpu_find(vm, vcpuid); - int rc; - - TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid); - - rc = ioctl(vcpu->fd, KVM_SET_CPUID2, cpuid); - TEST_ASSERT(rc == 0, "KVM_SET_CPUID2 failed, rc: %i errno: %i", - rc, errno); - -} - -struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages, - void *guest_code) -{ - struct kvm_vm *vm; - /* - * For x86 the maximum page table size for a memory region - * will be when only 4K pages are used. In that case the - * total extra size for page tables (for extra N pages) will - * be: N/512+N/512^2+N/512^3+... which is definitely smaller - * than N/512*2. - */ - uint64_t extra_pg_pages = extra_mem_pages / 512 * 2; - - /* Create VM */ - vm = vm_create(VM_MODE_DEFAULT, - DEFAULT_GUEST_PHY_PAGES + extra_pg_pages, - O_RDWR); - - /* Setup guest code */ - kvm_vm_elf_load(vm, program_invocation_name, 0, 0); - - /* Setup IRQ Chip */ - vm_create_irqchip(vm); - - /* Add the first vCPU. */ - vm_vcpu_add_default(vm, vcpuid, guest_code); - - return vm; -} - -/* - * VCPU Get MSR - * - * Input Args: - * vm - Virtual Machine - * vcpuid - VCPU ID - * msr_index - Index of MSR - * - * Output Args: None - * - * Return: On success, value of the MSR. On failure a TEST_ASSERT is produced. - * - * Get value of MSR for VCPU. - */ -uint64_t vcpu_get_msr(struct kvm_vm *vm, uint32_t vcpuid, uint64_t msr_index) -{ - struct vcpu *vcpu = vcpu_find(vm, vcpuid); - struct { - struct kvm_msrs header; - struct kvm_msr_entry entry; - } buffer = {}; - int r; - - TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid); - buffer.header.nmsrs = 1; - buffer.entry.index = msr_index; - r = ioctl(vcpu->fd, KVM_GET_MSRS, &buffer.header); - TEST_ASSERT(r == 1, "KVM_GET_MSRS IOCTL failed,\n" - " rc: %i errno: %i", r, errno); - - return buffer.entry.data; -} - -/* - * _VCPU Set MSR - * - * Input Args: - * vm - Virtual Machine - * vcpuid - VCPU ID - * msr_index - Index of MSR - * msr_value - New value of MSR - * - * Output Args: None - * - * Return: The result of KVM_SET_MSRS. - * - * Sets the value of an MSR for the given VCPU. - */ -int _vcpu_set_msr(struct kvm_vm *vm, uint32_t vcpuid, uint64_t msr_index, - uint64_t msr_value) -{ - struct vcpu *vcpu = vcpu_find(vm, vcpuid); - struct { - struct kvm_msrs header; - struct kvm_msr_entry entry; - } buffer = {}; - int r; - - TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid); - memset(&buffer, 0, sizeof(buffer)); - buffer.header.nmsrs = 1; - buffer.entry.index = msr_index; - buffer.entry.data = msr_value; - r = ioctl(vcpu->fd, KVM_SET_MSRS, &buffer.header); - return r; -} - -/* - * VCPU Set MSR - * - * Input Args: - * vm - Virtual Machine - * vcpuid - VCPU ID - * msr_index - Index of MSR - * msr_value - New value of MSR - * - * Output Args: None - * - * Return: On success, nothing. On failure a TEST_ASSERT is produced. - * - * Set value of MSR for VCPU. - */ -void vcpu_set_msr(struct kvm_vm *vm, uint32_t vcpuid, uint64_t msr_index, - uint64_t msr_value) -{ - int r; - - r = _vcpu_set_msr(vm, vcpuid, msr_index, msr_value); - TEST_ASSERT(r == 1, "KVM_SET_MSRS IOCTL failed,\n" - " rc: %i errno: %i", r, errno); -} - -void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...) -{ - va_list ap; - struct kvm_regs regs; - - TEST_ASSERT(num >= 1 && num <= 6, "Unsupported number of args,\n" - " num: %u\n", - num); - - va_start(ap, num); - vcpu_regs_get(vm, vcpuid, ®s); - - if (num >= 1) - regs.rdi = va_arg(ap, uint64_t); - - if (num >= 2) - regs.rsi = va_arg(ap, uint64_t); - - if (num >= 3) - regs.rdx = va_arg(ap, uint64_t); - - if (num >= 4) - regs.rcx = va_arg(ap, uint64_t); - - if (num >= 5) - regs.r8 = va_arg(ap, uint64_t); - - if (num >= 6) - regs.r9 = va_arg(ap, uint64_t); - - vcpu_regs_set(vm, vcpuid, ®s); - va_end(ap); -} - -void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, uint8_t indent) -{ - struct kvm_regs regs; - struct kvm_sregs sregs; - - fprintf(stream, "%*scpuid: %u\n", indent, "", vcpuid); - - fprintf(stream, "%*sregs:\n", indent + 2, ""); - vcpu_regs_get(vm, vcpuid, ®s); - regs_dump(stream, ®s, indent + 4); - - fprintf(stream, "%*ssregs:\n", indent + 2, ""); - vcpu_sregs_get(vm, vcpuid, &sregs); - sregs_dump(stream, &sregs, indent + 4); -} - -struct kvm_x86_state { - struct kvm_vcpu_events events; - struct kvm_mp_state mp_state; - struct kvm_regs regs; - struct kvm_xsave xsave; - struct kvm_xcrs xcrs; - struct kvm_sregs sregs; - struct kvm_debugregs debugregs; - union { - struct kvm_nested_state nested; - char nested_[16384]; - }; - struct kvm_msrs msrs; -}; - -static int kvm_get_num_msrs_fd(int kvm_fd) -{ - struct kvm_msr_list nmsrs; - int r; - - nmsrs.nmsrs = 0; - r = ioctl(kvm_fd, KVM_GET_MSR_INDEX_LIST, &nmsrs); - TEST_ASSERT(r == -1 && errno == E2BIG, "Unexpected result from KVM_GET_MSR_INDEX_LIST probe, r: %i", - r); - - return nmsrs.nmsrs; -} - -static int kvm_get_num_msrs(struct kvm_vm *vm) -{ - return kvm_get_num_msrs_fd(vm->kvm_fd); -} - -struct kvm_msr_list *kvm_get_msr_index_list(void) -{ - struct kvm_msr_list *list; - int nmsrs, r, kvm_fd; - - kvm_fd = open(KVM_DEV_PATH, O_RDONLY); - if (kvm_fd < 0) - exit(KSFT_SKIP); - - nmsrs = kvm_get_num_msrs_fd(kvm_fd); - list = malloc(sizeof(*list) + nmsrs * sizeof(list->indices[0])); - list->nmsrs = nmsrs; - r = ioctl(kvm_fd, KVM_GET_MSR_INDEX_LIST, list); - close(kvm_fd); - - TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_MSR_INDEX_LIST, r: %i", - r); - - return list; -} - -struct kvm_x86_state *vcpu_save_state(struct kvm_vm *vm, uint32_t vcpuid) -{ - struct vcpu *vcpu = vcpu_find(vm, vcpuid); - struct kvm_msr_list *list; - struct kvm_x86_state *state; - int nmsrs, r, i; - static int nested_size = -1; - - if (nested_size == -1) { - nested_size = kvm_check_cap(KVM_CAP_NESTED_STATE); - TEST_ASSERT(nested_size <= sizeof(state->nested_), - "Nested state size too big, %i > %zi", - nested_size, sizeof(state->nested_)); - } - - /* - * When KVM exits to userspace with KVM_EXIT_IO, KVM guarantees - * guest state is consistent only after userspace re-enters the - * kernel with KVM_RUN. Complete IO prior to migrating state - * to a new VM. - */ - vcpu_run_complete_io(vm, vcpuid); - - nmsrs = kvm_get_num_msrs(vm); - list = malloc(sizeof(*list) + nmsrs * sizeof(list->indices[0])); - list->nmsrs = nmsrs; - r = ioctl(vm->kvm_fd, KVM_GET_MSR_INDEX_LIST, list); - TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_MSR_INDEX_LIST, r: %i", - r); - - state = malloc(sizeof(*state) + nmsrs * sizeof(state->msrs.entries[0])); - r = ioctl(vcpu->fd, KVM_GET_VCPU_EVENTS, &state->events); - TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_VCPU_EVENTS, r: %i", - r); - - r = ioctl(vcpu->fd, KVM_GET_MP_STATE, &state->mp_state); - TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_MP_STATE, r: %i", - r); - - r = ioctl(vcpu->fd, KVM_GET_REGS, &state->regs); - TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_REGS, r: %i", - r); - - r = ioctl(vcpu->fd, KVM_GET_XSAVE, &state->xsave); - TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_XSAVE, r: %i", - r); - - if (kvm_check_cap(KVM_CAP_XCRS)) { - r = ioctl(vcpu->fd, KVM_GET_XCRS, &state->xcrs); - TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_XCRS, r: %i", - r); - } - - r = ioctl(vcpu->fd, KVM_GET_SREGS, &state->sregs); - TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_SREGS, r: %i", - r); - - if (nested_size) { - state->nested.size = sizeof(state->nested_); - r = ioctl(vcpu->fd, KVM_GET_NESTED_STATE, &state->nested); - TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_NESTED_STATE, r: %i", - r); - TEST_ASSERT(state->nested.size <= nested_size, - "Nested state size too big, %i (KVM_CHECK_CAP gave %i)", - state->nested.size, nested_size); - } else - state->nested.size = 0; - - state->msrs.nmsrs = nmsrs; - for (i = 0; i < nmsrs; i++) - state->msrs.entries[i].index = list->indices[i]; - r = ioctl(vcpu->fd, KVM_GET_MSRS, &state->msrs); - TEST_ASSERT(r == nmsrs, "Unexpected result from KVM_GET_MSRS, r: %i (failed MSR was 0x%x)", - r, r == nmsrs ? -1 : list->indices[r]); - - r = ioctl(vcpu->fd, KVM_GET_DEBUGREGS, &state->debugregs); - TEST_ASSERT(r == 0, "Unexpected result from KVM_GET_DEBUGREGS, r: %i", - r); - - free(list); - return state; -} - -void vcpu_load_state(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_x86_state *state) -{ - struct vcpu *vcpu = vcpu_find(vm, vcpuid); - int r; - - r = ioctl(vcpu->fd, KVM_SET_XSAVE, &state->xsave); - TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_XSAVE, r: %i", - r); - - if (kvm_check_cap(KVM_CAP_XCRS)) { - r = ioctl(vcpu->fd, KVM_SET_XCRS, &state->xcrs); - TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_XCRS, r: %i", - r); - } - - r = ioctl(vcpu->fd, KVM_SET_SREGS, &state->sregs); - TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_SREGS, r: %i", - r); - - r = ioctl(vcpu->fd, KVM_SET_MSRS, &state->msrs); - TEST_ASSERT(r == state->msrs.nmsrs, "Unexpected result from KVM_SET_MSRS, r: %i (failed at %x)", - r, r == state->msrs.nmsrs ? -1 : state->msrs.entries[r].index); - - r = ioctl(vcpu->fd, KVM_SET_VCPU_EVENTS, &state->events); - TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_VCPU_EVENTS, r: %i", - r); - - r = ioctl(vcpu->fd, KVM_SET_MP_STATE, &state->mp_state); - TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_MP_STATE, r: %i", - r); - - r = ioctl(vcpu->fd, KVM_SET_DEBUGREGS, &state->debugregs); - TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_DEBUGREGS, r: %i", - r); - - r = ioctl(vcpu->fd, KVM_SET_REGS, &state->regs); - TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_REGS, r: %i", - r); - - if (state->nested.size) { - r = ioctl(vcpu->fd, KVM_SET_NESTED_STATE, &state->nested); - TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_NESTED_STATE, r: %i", - r); - } -} - -bool is_intel_cpu(void) -{ - int eax, ebx, ecx, edx; - const uint32_t *chunk; - const int leaf = 0; - - __asm__ __volatile__( - "cpuid" - : /* output */ "=a"(eax), "=b"(ebx), - "=c"(ecx), "=d"(edx) - : /* input */ "0"(leaf), "2"(0)); - - chunk = (const uint32_t *)("GenuineIntel"); - return (ebx == chunk[0] && edx == chunk[1] && ecx == chunk[2]); -} - -uint32_t kvm_get_cpuid_max_basic(void) -{ - return kvm_get_supported_cpuid_entry(0)->eax; -} - -uint32_t kvm_get_cpuid_max_extended(void) -{ - return kvm_get_supported_cpuid_entry(0x80000000)->eax; -} - -void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits) -{ - struct kvm_cpuid_entry2 *entry; - bool pae; - - /* SDM 4.1.4 */ - if (kvm_get_cpuid_max_extended() < 0x80000008) { - pae = kvm_get_supported_cpuid_entry(1)->edx & (1 << 6); - *pa_bits = pae ? 36 : 32; - *va_bits = 32; - } else { - entry = kvm_get_supported_cpuid_entry(0x80000008); - *pa_bits = entry->eax & 0xff; - *va_bits = (entry->eax >> 8) & 0xff; - } -} diff --git a/tools/testing/selftests/kvm/lib/x86_64/svm.c b/tools/testing/selftests/kvm/lib/x86_64/svm.c deleted file mode 100644 index 3a5c72ed2b79..000000000000 --- a/tools/testing/selftests/kvm/lib/x86_64/svm.c +++ /dev/null @@ -1,165 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * tools/testing/selftests/kvm/lib/x86_64/svm.c - * Helpers used for nested SVM testing - * Largely inspired from KVM unit test svm.c - * - * Copyright (C) 2020, Red Hat, Inc. - */ - -#include "test_util.h" -#include "kvm_util.h" -#include "../kvm_util_internal.h" -#include "processor.h" -#include "svm_util.h" - -struct gpr64_regs guest_regs; -u64 rflags; - -/* Allocate memory regions for nested SVM tests. - * - * Input Args: - * vm - The VM to allocate guest-virtual addresses in. - * - * Output Args: - * p_svm_gva - The guest virtual address for the struct svm_test_data. - * - * Return: - * Pointer to structure with the addresses of the SVM areas. - */ -struct svm_test_data * -vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva) -{ - vm_vaddr_t svm_gva = vm_vaddr_alloc(vm, getpagesize(), - 0x10000, 0, 0); - struct svm_test_data *svm = addr_gva2hva(vm, svm_gva); - - svm->vmcb = (void *)vm_vaddr_alloc(vm, getpagesize(), - 0x10000, 0, 0); - svm->vmcb_hva = addr_gva2hva(vm, (uintptr_t)svm->vmcb); - svm->vmcb_gpa = addr_gva2gpa(vm, (uintptr_t)svm->vmcb); - - svm->save_area = (void *)vm_vaddr_alloc(vm, getpagesize(), - 0x10000, 0, 0); - svm->save_area_hva = addr_gva2hva(vm, (uintptr_t)svm->save_area); - svm->save_area_gpa = addr_gva2gpa(vm, (uintptr_t)svm->save_area); - - *p_svm_gva = svm_gva; - return svm; -} - -static void vmcb_set_seg(struct vmcb_seg *seg, u16 selector, - u64 base, u32 limit, u32 attr) -{ - seg->selector = selector; - seg->attrib = attr; - seg->limit = limit; - seg->base = base; -} - -void generic_svm_setup(struct svm_test_data *svm, void *guest_rip, void *guest_rsp) -{ - struct vmcb *vmcb = svm->vmcb; - uint64_t vmcb_gpa = svm->vmcb_gpa; - struct vmcb_save_area *save = &vmcb->save; - struct vmcb_control_area *ctrl = &vmcb->control; - u32 data_seg_attr = 3 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_P_MASK - | SVM_SELECTOR_DB_MASK | SVM_SELECTOR_G_MASK; - u32 code_seg_attr = 9 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_P_MASK - | SVM_SELECTOR_L_MASK | SVM_SELECTOR_G_MASK; - uint64_t efer; - - efer = rdmsr(MSR_EFER); - wrmsr(MSR_EFER, efer | EFER_SVME); - wrmsr(MSR_VM_HSAVE_PA, svm->save_area_gpa); - - memset(vmcb, 0, sizeof(*vmcb)); - asm volatile ("vmsave\n\t" : : "a" (vmcb_gpa) : "memory"); - vmcb_set_seg(&save->es, get_es(), 0, -1U, data_seg_attr); - vmcb_set_seg(&save->cs, get_cs(), 0, -1U, code_seg_attr); - vmcb_set_seg(&save->ss, get_ss(), 0, -1U, data_seg_attr); - vmcb_set_seg(&save->ds, get_ds(), 0, -1U, data_seg_attr); - vmcb_set_seg(&save->gdtr, 0, get_gdt().address, get_gdt().size, 0); - vmcb_set_seg(&save->idtr, 0, get_idt().address, get_idt().size, 0); - - ctrl->asid = 1; - save->cpl = 0; - save->efer = rdmsr(MSR_EFER); - asm volatile ("mov %%cr4, %0" : "=r"(save->cr4) : : "memory"); - asm volatile ("mov %%cr3, %0" : "=r"(save->cr3) : : "memory"); - asm volatile ("mov %%cr0, %0" : "=r"(save->cr0) : : "memory"); - asm volatile ("mov %%dr7, %0" : "=r"(save->dr7) : : "memory"); - asm volatile ("mov %%dr6, %0" : "=r"(save->dr6) : : "memory"); - asm volatile ("mov %%cr2, %0" : "=r"(save->cr2) : : "memory"); - save->g_pat = rdmsr(MSR_IA32_CR_PAT); - save->dbgctl = rdmsr(MSR_IA32_DEBUGCTLMSR); - ctrl->intercept = (1ULL << INTERCEPT_VMRUN) | - (1ULL << INTERCEPT_VMMCALL); - - vmcb->save.rip = (u64)guest_rip; - vmcb->save.rsp = (u64)guest_rsp; - guest_regs.rdi = (u64)svm; -} - -/* - * save/restore 64-bit general registers except rax, rip, rsp - * which are directly handed through the VMCB guest processor state - */ -#define SAVE_GPR_C \ - "xchg %%rbx, guest_regs+0x20\n\t" \ - "xchg %%rcx, guest_regs+0x10\n\t" \ - "xchg %%rdx, guest_regs+0x18\n\t" \ - "xchg %%rbp, guest_regs+0x30\n\t" \ - "xchg %%rsi, guest_regs+0x38\n\t" \ - "xchg %%rdi, guest_regs+0x40\n\t" \ - "xchg %%r8, guest_regs+0x48\n\t" \ - "xchg %%r9, guest_regs+0x50\n\t" \ - "xchg %%r10, guest_regs+0x58\n\t" \ - "xchg %%r11, guest_regs+0x60\n\t" \ - "xchg %%r12, guest_regs+0x68\n\t" \ - "xchg %%r13, guest_regs+0x70\n\t" \ - "xchg %%r14, guest_regs+0x78\n\t" \ - "xchg %%r15, guest_regs+0x80\n\t" - -#define LOAD_GPR_C SAVE_GPR_C - -/* - * selftests do not use interrupts so we dropped clgi/sti/cli/stgi - * for now. registers involved in LOAD/SAVE_GPR_C are eventually - * unmodified so they do not need to be in the clobber list. - */ -void run_guest(struct vmcb *vmcb, uint64_t vmcb_gpa) -{ - asm volatile ( - "vmload\n\t" - "mov rflags, %%r15\n\t" // rflags - "mov %%r15, 0x170(%[vmcb])\n\t" - "mov guest_regs, %%r15\n\t" // rax - "mov %%r15, 0x1f8(%[vmcb])\n\t" - LOAD_GPR_C - "vmrun\n\t" - SAVE_GPR_C - "mov 0x170(%[vmcb]), %%r15\n\t" // rflags - "mov %%r15, rflags\n\t" - "mov 0x1f8(%[vmcb]), %%r15\n\t" // rax - "mov %%r15, guest_regs\n\t" - "vmsave\n\t" - : : [vmcb] "r" (vmcb), [vmcb_gpa] "a" (vmcb_gpa) - : "r15", "memory"); -} - -bool nested_svm_supported(void) -{ - struct kvm_cpuid_entry2 *entry = - kvm_get_supported_cpuid_entry(0x80000001); - - return entry->ecx & CPUID_SVM; -} - -void nested_svm_check_supported(void) -{ - if (!nested_svm_supported()) { - print_skip("nested SVM not enabled"); - exit(KSFT_SKIP); - } -} diff --git a/tools/testing/selftests/kvm/lib/x86_64/ucall.c b/tools/testing/selftests/kvm/lib/x86_64/ucall.c deleted file mode 100644 index da4d89ad5419..000000000000 --- a/tools/testing/selftests/kvm/lib/x86_64/ucall.c +++ /dev/null @@ -1,56 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * ucall support. A ucall is a "hypercall to userspace". - * - * Copyright (C) 2018, Red Hat, Inc. - */ -#include "kvm_util.h" - -#define UCALL_PIO_PORT ((uint16_t)0x1000) - -void ucall_init(struct kvm_vm *vm, void *arg) -{ -} - -void ucall_uninit(struct kvm_vm *vm) -{ -} - -void ucall(uint64_t cmd, int nargs, ...) -{ - struct ucall uc = { - .cmd = cmd, - }; - va_list va; - int i; - - nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS; - - va_start(va, nargs); - for (i = 0; i < nargs; ++i) - uc.args[i] = va_arg(va, uint64_t); - va_end(va); - - asm volatile("in %[port], %%al" - : : [port] "d" (UCALL_PIO_PORT), "D" (&uc) : "rax", "memory"); -} - -uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc) -{ - struct kvm_run *run = vcpu_state(vm, vcpu_id); - struct ucall ucall = {}; - - if (run->exit_reason == KVM_EXIT_IO && run->io.port == UCALL_PIO_PORT) { - struct kvm_regs regs; - - vcpu_regs_get(vm, vcpu_id, ®s); - memcpy(&ucall, addr_gva2hva(vm, (vm_vaddr_t)regs.rdi), - sizeof(ucall)); - - vcpu_run_complete_io(vm, vcpu_id); - if (uc) - memcpy(uc, &ucall, sizeof(ucall)); - } - - return ucall.cmd; -} 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 f1e00d43eea2..000000000000 --- a/tools/testing/selftests/kvm/lib/x86_64/vmx.c +++ /dev/null @@ -1,544 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * tools/testing/selftests/kvm/lib/x86_64/vmx.c - * - * Copyright (C) 2018, Google LLC. - */ - -#include "test_util.h" -#include "kvm_util.h" -#include "../kvm_util_internal.h" -#include "processor.h" -#include "vmx.h" - -#define PAGE_SHIFT_4K 12 - -#define KVM_EPT_PAGE_TABLE_MIN_PADDR 0x1c0000 - -bool enable_evmcs; - -struct hv_enlightened_vmcs *current_evmcs; -struct hv_vp_assist_page *current_vp_assist; - -struct eptPageTableEntry { - uint64_t readable:1; - uint64_t writable:1; - uint64_t executable:1; - uint64_t memory_type:3; - uint64_t ignore_pat:1; - uint64_t page_size:1; - uint64_t accessed:1; - uint64_t dirty:1; - uint64_t ignored_11_10:2; - uint64_t address:40; - uint64_t ignored_62_52:11; - uint64_t suppress_ve:1; -}; - -struct eptPageTablePointer { - uint64_t memory_type:3; - uint64_t page_walk_length:3; - uint64_t ad_enabled:1; - uint64_t reserved_11_07:5; - uint64_t address:40; - uint64_t reserved_63_52:12; -}; -int vcpu_enable_evmcs(struct kvm_vm *vm, int vcpu_id) -{ - uint16_t evmcs_ver; - - struct kvm_enable_cap enable_evmcs_cap = { - .cap = KVM_CAP_HYPERV_ENLIGHTENED_VMCS, - .args[0] = (unsigned long)&evmcs_ver - }; - - vcpu_ioctl(vm, vcpu_id, KVM_ENABLE_CAP, &enable_evmcs_cap); - - /* KVM should return supported EVMCS version range */ - TEST_ASSERT(((evmcs_ver >> 8) >= (evmcs_ver & 0xff)) && - (evmcs_ver & 0xff) > 0, - "Incorrect EVMCS version range: %x:%x\n", - evmcs_ver & 0xff, evmcs_ver >> 8); - - return evmcs_ver; -} - -/* 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 = FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX; - required |= FEAT_CTL_LOCKED; - feature_control = rdmsr(MSR_IA32_FEAT_CTL); - if ((feature_control & required) != required) - wrmsr(MSR_IA32_FEAT_CTL, 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 = EVMCS_VERSION; - } - - return true; -} - -/* - * Initialize the control fields to the most basic settings possible. - */ -static inline void init_vmcs_control_fields(struct vmx_pages *vmx) -{ - uint32_t sec_exec_ctl = 0; - - vmwrite(VIRTUAL_PROCESSOR_ID, 0); - vmwrite(POSTED_INTR_NV, 0); - - vmwrite(PIN_BASED_VM_EXEC_CONTROL, rdmsr(MSR_IA32_VMX_TRUE_PINBASED_CTLS)); - - if (vmx->eptp_gpa) { - uint64_t ept_paddr; - struct eptPageTablePointer eptp = { - .memory_type = VMX_BASIC_MEM_TYPE_WB, - .page_walk_length = 3, /* + 1 */ - .ad_enabled = !!(rdmsr(MSR_IA32_VMX_EPT_VPID_CAP) & VMX_EPT_VPID_CAP_AD_BITS), - .address = vmx->eptp_gpa >> PAGE_SHIFT_4K, - }; - - memcpy(&ept_paddr, &eptp, sizeof(ept_paddr)); - vmwrite(EPT_POINTER, ept_paddr); - sec_exec_ctl |= SECONDARY_EXEC_ENABLE_EPT; - } - - if (!vmwrite(SECONDARY_VM_EXEC_CONTROL, sec_exec_ctl)) - 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)); - GUEST_ASSERT(!sec_exec_ctl); - } - - 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().address + get_tr()))); - vmwrite(HOST_GDTR_BASE, get_gdt().address); - vmwrite(HOST_IDTR_BASE, get_idt().address); - 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); -} - -bool nested_vmx_supported(void) -{ - struct kvm_cpuid_entry2 *entry = kvm_get_supported_cpuid_entry(1); - - return entry->ecx & CPUID_VMX; -} - -void nested_vmx_check_supported(void) -{ - if (!nested_vmx_supported()) { - print_skip("nested VMX not enabled"); - exit(KSFT_SKIP); - } -} - -void nested_pg_map(struct vmx_pages *vmx, struct kvm_vm *vm, - uint64_t nested_paddr, uint64_t paddr, uint32_t eptp_memslot) -{ - uint16_t index[4]; - struct eptPageTableEntry *pml4e; - - TEST_ASSERT(vm->mode == VM_MODE_PXXV48_4K, "Attempt to use " - "unknown or unsupported guest mode, mode: 0x%x", vm->mode); - - TEST_ASSERT((nested_paddr % vm->page_size) == 0, - "Nested physical address not on page boundary,\n" - " nested_paddr: 0x%lx vm->page_size: 0x%x", - nested_paddr, vm->page_size); - TEST_ASSERT((nested_paddr >> vm->page_shift) <= vm->max_gfn, - "Physical address beyond beyond maximum supported,\n" - " nested_paddr: 0x%lx vm->max_gfn: 0x%lx vm->page_size: 0x%x", - paddr, vm->max_gfn, vm->page_size); - TEST_ASSERT((paddr % vm->page_size) == 0, - "Physical address not on page boundary,\n" - " paddr: 0x%lx vm->page_size: 0x%x", - paddr, vm->page_size); - TEST_ASSERT((paddr >> vm->page_shift) <= vm->max_gfn, - "Physical address beyond beyond maximum supported,\n" - " paddr: 0x%lx vm->max_gfn: 0x%lx vm->page_size: 0x%x", - paddr, vm->max_gfn, vm->page_size); - - index[0] = (nested_paddr >> 12) & 0x1ffu; - index[1] = (nested_paddr >> 21) & 0x1ffu; - index[2] = (nested_paddr >> 30) & 0x1ffu; - index[3] = (nested_paddr >> 39) & 0x1ffu; - - /* Allocate page directory pointer table if not present. */ - pml4e = vmx->eptp_hva; - if (!pml4e[index[3]].readable) { - pml4e[index[3]].address = vm_phy_page_alloc(vm, - KVM_EPT_PAGE_TABLE_MIN_PADDR, eptp_memslot) - >> vm->page_shift; - pml4e[index[3]].writable = true; - pml4e[index[3]].readable = true; - pml4e[index[3]].executable = true; - } - - /* Allocate page directory table if not present. */ - struct eptPageTableEntry *pdpe; - pdpe = addr_gpa2hva(vm, pml4e[index[3]].address * vm->page_size); - if (!pdpe[index[2]].readable) { - pdpe[index[2]].address = vm_phy_page_alloc(vm, - KVM_EPT_PAGE_TABLE_MIN_PADDR, eptp_memslot) - >> vm->page_shift; - pdpe[index[2]].writable = true; - pdpe[index[2]].readable = true; - pdpe[index[2]].executable = true; - } - - /* Allocate page table if not present. */ - struct eptPageTableEntry *pde; - pde = addr_gpa2hva(vm, pdpe[index[2]].address * vm->page_size); - if (!pde[index[1]].readable) { - pde[index[1]].address = vm_phy_page_alloc(vm, - KVM_EPT_PAGE_TABLE_MIN_PADDR, eptp_memslot) - >> vm->page_shift; - pde[index[1]].writable = true; - pde[index[1]].readable = true; - pde[index[1]].executable = true; - } - - /* Fill in page table entry. */ - struct eptPageTableEntry *pte; - pte = addr_gpa2hva(vm, pde[index[1]].address * vm->page_size); - pte[index[0]].address = paddr >> vm->page_shift; - pte[index[0]].writable = true; - pte[index[0]].readable = true; - pte[index[0]].executable = true; - - /* - * For now mark these as accessed and dirty because the only - * testcase we have needs that. Can be reconsidered later. - */ - pte[index[0]].accessed = true; - pte[index[0]].dirty = true; -} - -/* - * Map a range of EPT guest physical addresses to the VM's physical address - * - * Input Args: - * vm - Virtual Machine - * nested_paddr - Nested guest physical address to map - * paddr - VM Physical Address - * size - The size of the range to map - * eptp_memslot - Memory region slot for new virtual translation tables - * - * Output Args: None - * - * Return: None - * - * Within the VM given by vm, creates a nested guest translation for the - * page range starting at nested_paddr to the page range starting at paddr. - */ -void nested_map(struct vmx_pages *vmx, struct kvm_vm *vm, - uint64_t nested_paddr, uint64_t paddr, uint64_t size, - uint32_t eptp_memslot) -{ - size_t page_size = vm->page_size; - size_t npages = size / page_size; - - TEST_ASSERT(nested_paddr + size > nested_paddr, "Vaddr overflow"); - TEST_ASSERT(paddr + size > paddr, "Paddr overflow"); - - while (npages--) { - nested_pg_map(vmx, vm, nested_paddr, paddr, eptp_memslot); - nested_paddr += page_size; - paddr += page_size; - } -} - -/* Prepare an identity extended page table that maps all the - * physical pages in VM. - */ -void nested_map_memslot(struct vmx_pages *vmx, struct kvm_vm *vm, - uint32_t memslot, uint32_t eptp_memslot) -{ - sparsebit_idx_t i, last; - struct userspace_mem_region *region = - memslot2region(vm, memslot); - - i = (region->region.guest_phys_addr >> vm->page_shift) - 1; - last = i + (region->region.memory_size >> vm->page_shift); - for (;;) { - i = sparsebit_next_clear(region->unused_phy_pages, i); - if (i > last) - break; - - nested_map(vmx, vm, - (uint64_t)i << vm->page_shift, - (uint64_t)i << vm->page_shift, - 1 << vm->page_shift, - eptp_memslot); - } -} - -void prepare_eptp(struct vmx_pages *vmx, struct kvm_vm *vm, - uint32_t eptp_memslot) -{ - vmx->eptp = (void *)vm_vaddr_alloc(vm, getpagesize(), 0x10000, 0, 0); - vmx->eptp_hva = addr_gva2hva(vm, (uintptr_t)vmx->eptp); - vmx->eptp_gpa = addr_gva2gpa(vm, (uintptr_t)vmx->eptp); -} |