diff options
Diffstat (limited to 'tools/testing/selftests/kvm/lib/x86_64/processor.c')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/processor.c | 1566 |
1 files changed, 0 insertions, 1566 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 5f9d7e91dc69..000000000000 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ /dev/null @@ -1,1566 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * tools/testing/selftests/kvm/lib/x86_64/processor.c - * - * Copyright (C) 2018, Google LLC. - */ - -#include "test_util.h" -#include "kvm_util.h" -#include "../kvm_util_internal.h" -#include "processor.h" - -#ifndef NUM_INTERRUPTS -#define NUM_INTERRUPTS 256 -#endif - -#define DEFAULT_CODE_SELECTOR 0x8 -#define DEFAULT_DATA_SELECTOR 0x10 - -vm_vaddr_t exception_handlers; - -/* Virtual translation table structure declarations */ -struct pageUpperEntry { - 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 pfn: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 pfn: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) -{ - 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->pgd = vm_alloc_page_table(vm); - vm->pgd_created = true; - } -} - -static void *virt_get_pte(struct kvm_vm *vm, uint64_t pt_pfn, uint64_t vaddr, - int level) -{ - uint64_t *page_table = addr_gpa2hva(vm, pt_pfn << vm->page_shift); - int index = vaddr >> (vm->page_shift + level * 9) & 0x1ffu; - - return &page_table[index]; -} - -static struct pageUpperEntry *virt_create_upper_pte(struct kvm_vm *vm, - uint64_t pt_pfn, - uint64_t vaddr, - uint64_t paddr, - int level, - enum x86_page_size page_size) -{ - struct pageUpperEntry *pte = virt_get_pte(vm, pt_pfn, vaddr, level); - - if (!pte->present) { - pte->writable = true; - pte->present = true; - pte->page_size = (level == page_size); - if (pte->page_size) - pte->pfn = paddr >> vm->page_shift; - else - pte->pfn = vm_alloc_page_table(vm) >> vm->page_shift; - } else { - /* - * Entry already present. Assert that the caller doesn't want - * a hugepage at this level, and that there isn't a hugepage at - * this level. - */ - TEST_ASSERT(level != page_size, - "Cannot create hugepage at level: %u, vaddr: 0x%lx\n", - page_size, vaddr); - TEST_ASSERT(!pte->page_size, - "Cannot create page table at level: %u, vaddr: 0x%lx\n", - level, vaddr); - } - return pte; -} - -void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, - enum x86_page_size page_size) -{ - const uint64_t pg_size = 1ull << ((page_size * 9) + 12); - struct pageUpperEntry *pml4e, *pdpe, *pde; - struct pageTableEntry *pte; - - TEST_ASSERT(vm->mode == VM_MODE_PXXV48_4K, - "Unknown or unsupported guest mode, mode: 0x%x", vm->mode); - - TEST_ASSERT((vaddr % pg_size) == 0, - "Virtual address not aligned,\n" - "vaddr: 0x%lx page size: 0x%lx", vaddr, pg_size); - TEST_ASSERT(sparsebit_is_set(vm->vpages_valid, (vaddr >> vm->page_shift)), - "Invalid virtual address, vaddr: 0x%lx", vaddr); - TEST_ASSERT((paddr % pg_size) == 0, - "Physical address not aligned,\n" - " paddr: 0x%lx page size: 0x%lx", paddr, pg_size); - TEST_ASSERT((paddr >> vm->page_shift) <= vm->max_gfn, - "Physical address beyond maximum supported,\n" - " paddr: 0x%lx vm->max_gfn: 0x%lx vm->page_size: 0x%x", - paddr, vm->max_gfn, vm->page_size); - - /* - * Allocate upper level page tables, if not already present. Return - * early if a hugepage was created. - */ - pml4e = virt_create_upper_pte(vm, vm->pgd >> vm->page_shift, - vaddr, paddr, 3, page_size); - if (pml4e->page_size) - return; - - pdpe = virt_create_upper_pte(vm, pml4e->pfn, vaddr, paddr, 2, page_size); - if (pdpe->page_size) - return; - - pde = virt_create_upper_pte(vm, pdpe->pfn, vaddr, paddr, 1, page_size); - if (pde->page_size) - return; - - /* Fill in page table entry. */ - pte = virt_get_pte(vm, pde->pfn, vaddr, 0); - TEST_ASSERT(!pte->present, - "PTE already present for 4k page at vaddr: 0x%lx\n", vaddr); - pte->pfn = paddr >> vm->page_shift; - pte->writable = true; - pte->present = 1; -} - -void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) -{ - __virt_pg_map(vm, vaddr, paddr, X86_PAGE_SIZE_4K); -} - -static struct pageTableEntry *_vm_get_page_table_entry(struct kvm_vm *vm, int vcpuid, - uint64_t vaddr) -{ - uint16_t index[4]; - struct pageUpperEntry *pml4e, *pdpe, *pde; - struct pageTableEntry *pte; - struct kvm_cpuid_entry2 *entry; - struct kvm_sregs sregs; - int max_phy_addr; - /* Set the bottom 52 bits. */ - uint64_t rsvd_mask = 0x000fffffffffffff; - - entry = kvm_get_supported_cpuid_index(0x80000008, 0); - max_phy_addr = entry->eax & 0x000000ff; - /* Clear the bottom bits of the reserved mask. */ - rsvd_mask = (rsvd_mask >> max_phy_addr) << max_phy_addr; - - /* - * SDM vol 3, fig 4-11 "Formats of CR3 and Paging-Structure Entries - * with 4-Level Paging and 5-Level Paging". - * If IA32_EFER.NXE = 0 and the P flag of a paging-structure entry is 1, - * the XD flag (bit 63) is reserved. - */ - vcpu_sregs_get(vm, vcpuid, &sregs); - if ((sregs.efer & EFER_NX) == 0) { - rsvd_mask |= (1ull << 63); - } - - TEST_ASSERT(vm->mode == VM_MODE_PXXV48_4K, "Attempt to use " - "unknown or unsupported guest mode, mode: 0x%x", vm->mode); - TEST_ASSERT(sparsebit_is_set(vm->vpages_valid, - (vaddr >> vm->page_shift)), - "Invalid virtual address, vaddr: 0x%lx", - vaddr); - /* - * Based on the mode check above there are 48 bits in the vaddr, so - * shift 16 to sign extend the last bit (bit-47), - */ - TEST_ASSERT(vaddr == (((int64_t)vaddr << 16) >> 16), - "Canonical check failed. The virtual address is invalid."); - - index[0] = (vaddr >> 12) & 0x1ffu; - index[1] = (vaddr >> 21) & 0x1ffu; - index[2] = (vaddr >> 30) & 0x1ffu; - index[3] = (vaddr >> 39) & 0x1ffu; - - pml4e = addr_gpa2hva(vm, vm->pgd); - TEST_ASSERT(pml4e[index[3]].present, - "Expected pml4e to be present for gva: 0x%08lx", vaddr); - TEST_ASSERT((*(uint64_t*)(&pml4e[index[3]]) & - (rsvd_mask | (1ull << 7))) == 0, - "Unexpected reserved bits set."); - - pdpe = addr_gpa2hva(vm, pml4e[index[3]].pfn * vm->page_size); - TEST_ASSERT(pdpe[index[2]].present, - "Expected pdpe to be present for gva: 0x%08lx", vaddr); - TEST_ASSERT(pdpe[index[2]].page_size == 0, - "Expected pdpe to map a pde not a 1-GByte page."); - TEST_ASSERT((*(uint64_t*)(&pdpe[index[2]]) & rsvd_mask) == 0, - "Unexpected reserved bits set."); - - pde = addr_gpa2hva(vm, pdpe[index[2]].pfn * vm->page_size); - TEST_ASSERT(pde[index[1]].present, - "Expected pde to be present for gva: 0x%08lx", vaddr); - TEST_ASSERT(pde[index[1]].page_size == 0, - "Expected pde to map a pte not a 2-MByte page."); - TEST_ASSERT((*(uint64_t*)(&pde[index[1]]) & rsvd_mask) == 0, - "Unexpected reserved bits set."); - - pte = addr_gpa2hva(vm, pde[index[1]].pfn * vm->page_size); - TEST_ASSERT(pte[index[0]].present, - "Expected pte to be present for gva: 0x%08lx", vaddr); - - return &pte[index[0]]; -} - -uint64_t vm_get_page_table_entry(struct kvm_vm *vm, int vcpuid, uint64_t vaddr) -{ - struct pageTableEntry *pte = _vm_get_page_table_entry(vm, vcpuid, vaddr); - - return *(uint64_t *)pte; -} - -void vm_set_page_table_entry(struct kvm_vm *vm, int vcpuid, uint64_t vaddr, - uint64_t pte) -{ - struct pageTableEntry *new_pte = _vm_get_page_table_entry(vm, vcpuid, - vaddr); - - *(uint64_t *)new_pte = pte; -} - -void virt_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent) -{ - struct pageUpperEntry *pml4e, *pml4e_start; - struct pageUpperEntry *pdpe, *pdpe_start; - struct pageUpperEntry *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 pageUpperEntry *) 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->pfn, - pml4e->writable, pml4e->execute_disable); - - pdpe_start = addr_gpa2hva(vm, pml4e->pfn * 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->pfn, pdpe->writable, - pdpe->execute_disable); - - pde_start = addr_gpa2hva(vm, pdpe->pfn * 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->pfn, pde->writable, - pde->execute_disable); - - pte_start = addr_gpa2hva(vm, pde->pfn * 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->pfn, - 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->type = segp->type; - desc->s = segp->s; - desc->dpl = segp->dpl; - desc->p = segp->present; - desc->limit1 = segp->limit >> 16; - desc->avl = segp->avl; - 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 pageUpperEntry *pml4e, *pdpe, *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]].pfn * vm->page_size); - if (!pdpe[index[2]].present) - goto unmapped_gva; - - pde = addr_gpa2hva(vm, pdpe[index[2]].pfn * vm->page_size); - if (!pde[index[1]].present) - goto unmapped_gva; - - pte = addr_gpa2hva(vm, pde[index[1]].pfn * vm->page_size); - if (!pte[index[0]].present) - goto unmapped_gva; - - return (pte[index[0]].pfn * 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) -{ - if (!vm->gdt) - vm->gdt = vm_vaddr_alloc_page(vm); - - dt->base = vm->gdt; - dt->limit = getpagesize(); -} - -static void kvm_setup_tss_64bit(struct kvm_vm *vm, struct kvm_segment *segp, - int selector) -{ - if (!vm->tss) - vm->tss = vm_vaddr_alloc_page(vm); - - 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) -{ - 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); - - 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, DEFAULT_CODE_SELECTOR, &sregs.cs); - kvm_seg_set_kernel_data_64bit(vm, DEFAULT_DATA_SELECTOR, &sregs.ds); - kvm_seg_set_kernel_data_64bit(vm, DEFAULT_DATA_SELECTOR, &sregs.es); - kvm_setup_tss_64bit(vm, &sregs.tr, 0x18); - break; - - default: - TEST_FAIL("Unknown guest mode, mode: 0x%x", vm->mode); - } - - sregs.cr3 = vm->pgd; - vcpu_sregs_set(vm, vcpuid, &sregs); -} - -#define CPUID_XFD_BIT (1 << 4) -static bool is_xfd_supported(void) -{ - int eax, ebx, ecx, edx; - const int leaf = 0xd, subleaf = 0x1; - - __asm__ __volatile__( - "cpuid" - : /* output */ "=a"(eax), "=b"(ebx), - "=c"(ecx), "=d"(edx) - : /* input */ "0"(leaf), "2"(subleaf)); - - return !!(eax & CPUID_XFD_BIT); -} - -void vm_xsave_req_perm(void) -{ - unsigned long bitmask; - long rc; - - if (!is_xfd_supported()) - return; - - rc = syscall(SYS_arch_prctl, ARCH_REQ_XCOMP_GUEST_PERM, - XSTATE_XTILE_DATA_BIT); - /* - * The older kernel version(<5.15) can't support - * ARCH_REQ_XCOMP_GUEST_PERM and directly return. - */ - if (rc) - return; - - rc = syscall(SYS_arch_prctl, ARCH_GET_XCOMP_GUEST_PERM, &bitmask); - TEST_ASSERT(rc == 0, "prctl(ARCH_GET_XCOMP_GUEST_PERM) error: %ld", rc); - TEST_ASSERT(bitmask & XFEATURE_XTILE_MASK, - "prctl(ARCH_REQ_XCOMP_GUEST_PERM) failure bitmask=0x%lx", - bitmask); -} - -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); - - /* Create VCPU */ - vm_vcpu_add(vm, vcpuid); - vcpu_set_cpuid(vm, vcpuid, kvm_get_supported_cpuid()); - vcpu_setup(vm, vcpuid); - - /* 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_or_exit(); - - 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; -} - -/* - * KVM Get MSR - * - * Input Args: - * 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 kvm_get_feature_msr(uint64_t msr_index) -{ - struct { - struct kvm_msrs header; - struct kvm_msr_entry entry; - } buffer = {}; - int r, kvm_fd; - - buffer.header.nmsrs = 1; - buffer.entry.index = msr_index; - kvm_fd = open_kvm_dev_path_or_exit(); - - r = ioctl(kvm_fd, KVM_GET_MSRS, &buffer.header); - TEST_ASSERT(r == 1, "KVM_GET_MSRS IOCTL failed,\n" - " rc: %i errno: %i", r, errno); - - close(kvm_fd); - return buffer.entry.data; -} - -/* - * VM VCPU CPUID Set - * - * Input Args: - * vm - Virtual Machine - * vcpuid - VCPU id - * - * Output Args: None - * - * Return: KVM CPUID (KVM_GET_CPUID2) - * - * Set the VCPU's CPUID. - */ -struct kvm_cpuid2 *vcpu_get_cpuid(struct kvm_vm *vm, uint32_t vcpuid) -{ - struct vcpu *vcpu = vcpu_find(vm, vcpuid); - struct kvm_cpuid2 *cpuid; - int max_ent; - int rc = -1; - - TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid); - - cpuid = allocate_kvm_cpuid2(); - max_ent = cpuid->nent; - - for (cpuid->nent = 1; cpuid->nent <= max_ent; cpuid->nent++) { - rc = ioctl(vcpu->fd, KVM_GET_CPUID2, cpuid); - if (!rc) - break; - - TEST_ASSERT(rc == -1 && errno == E2BIG, - "KVM_GET_CPUID2 should either succeed or give E2BIG: %d %d", - rc, errno); - } - - TEST_ASSERT(rc == 0, "KVM_GET_CPUID2 failed, rc: %i errno: %i", - rc, errno); - - 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; -} - - -int __vcpu_set_cpuid(struct kvm_vm *vm, uint32_t vcpuid, - struct kvm_cpuid2 *cpuid) -{ - struct vcpu *vcpu = vcpu_find(vm, vcpuid); - - TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid); - - return ioctl(vcpu->fd, KVM_SET_CPUID2, cpuid); -} - -/* - * 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) -{ - int rc; - - rc = __vcpu_set_cpuid(vm, vcpuid, cpuid); - TEST_ASSERT(rc == 0, "KVM_SET_CPUID2 failed, rc: %i errno: %i", - rc, errno); - -} - -/* - * 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); -} - -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_or_exit(); - - 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; -} - -static int vcpu_save_xsave_state(struct kvm_vm *vm, struct vcpu *vcpu, - struct kvm_x86_state *state) -{ - int size; - - size = vm_check_cap(vm, KVM_CAP_XSAVE2); - if (!size) - size = sizeof(struct kvm_xsave); - - state->xsave = malloc(size); - if (size == sizeof(struct kvm_xsave)) - return ioctl(vcpu->fd, KVM_GET_XSAVE, state->xsave); - else - return ioctl(vcpu->fd, KVM_GET_XSAVE2, state->xsave); -} - -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 = vcpu_save_xsave_state(vm, vcpu, state); - 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_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); - - 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_XSAVE, state->xsave); - TEST_ASSERT(r == 0, "Unexpected result from KVM_SET_XSAVE, r: %i", - r); - - 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); - } -} - -void kvm_x86_state_cleanup(struct kvm_x86_state *state) -{ - free(state->xsave); - free(state); -} - -static bool cpu_vendor_string_is(const char *vendor) -{ - const uint32_t *chunk = (const uint32_t *)vendor; - int eax, ebx, ecx, edx; - const int leaf = 0; - - __asm__ __volatile__( - "cpuid" - : /* output */ "=a"(eax), "=b"(ebx), - "=c"(ecx), "=d"(edx) - : /* input */ "0"(leaf), "2"(0)); - - return (ebx == chunk[0] && edx == chunk[1] && ecx == chunk[2]); -} - -bool is_intel_cpu(void) -{ - return cpu_vendor_string_is("GenuineIntel"); -} - -/* - * Exclude early K5 samples with a vendor string of "AMDisbetter!" - */ -bool is_amd_cpu(void) -{ - return cpu_vendor_string_is("AuthenticAMD"); -} - -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; - } -} - -struct idt_entry { - uint16_t offset0; - uint16_t selector; - uint16_t ist : 3; - uint16_t : 5; - uint16_t type : 4; - uint16_t : 1; - uint16_t dpl : 2; - uint16_t p : 1; - uint16_t offset1; - uint32_t offset2; uint32_t reserved; -}; - -static void set_idt_entry(struct kvm_vm *vm, int vector, unsigned long addr, - int dpl, unsigned short selector) -{ - struct idt_entry *base = - (struct idt_entry *)addr_gva2hva(vm, vm->idt); - struct idt_entry *e = &base[vector]; - - memset(e, 0, sizeof(*e)); - e->offset0 = addr; - e->selector = selector; - e->ist = 0; - e->type = 14; - e->dpl = dpl; - e->p = 1; - e->offset1 = addr >> 16; - e->offset2 = addr >> 32; -} - -void kvm_exit_unexpected_vector(uint32_t value) -{ - ucall(UCALL_UNHANDLED, 1, value); -} - -void route_exception(struct ex_regs *regs) -{ - typedef void(*handler)(struct ex_regs *); - handler *handlers = (handler *)exception_handlers; - - if (handlers && handlers[regs->vector]) { - handlers[regs->vector](regs); - return; - } - - kvm_exit_unexpected_vector(regs->vector); -} - -void vm_init_descriptor_tables(struct kvm_vm *vm) -{ - extern void *idt_handlers; - int i; - - vm->idt = vm_vaddr_alloc_page(vm); - vm->handlers = vm_vaddr_alloc_page(vm); - /* Handlers have the same address in both address spaces.*/ - for (i = 0; i < NUM_INTERRUPTS; i++) - set_idt_entry(vm, i, (unsigned long)(&idt_handlers)[i], 0, - DEFAULT_CODE_SELECTOR); -} - -void vcpu_init_descriptor_tables(struct kvm_vm *vm, uint32_t vcpuid) -{ - struct kvm_sregs sregs; - - vcpu_sregs_get(vm, vcpuid, &sregs); - sregs.idt.base = vm->idt; - sregs.idt.limit = NUM_INTERRUPTS * sizeof(struct idt_entry) - 1; - sregs.gdt.base = vm->gdt; - sregs.gdt.limit = getpagesize() - 1; - kvm_seg_set_kernel_data_64bit(NULL, DEFAULT_DATA_SELECTOR, &sregs.gs); - vcpu_sregs_set(vm, vcpuid, &sregs); - *(vm_vaddr_t *)addr_gva2hva(vm, (vm_vaddr_t)(&exception_handlers)) = vm->handlers; -} - -void vm_install_exception_handler(struct kvm_vm *vm, int vector, - void (*handler)(struct ex_regs *)) -{ - vm_vaddr_t *handlers = (vm_vaddr_t *)addr_gva2hva(vm, vm->handlers); - - handlers[vector] = (vm_vaddr_t)handler; -} - -void assert_on_unhandled_exception(struct kvm_vm *vm, uint32_t vcpuid) -{ - struct ucall uc; - - if (get_ucall(vm, vcpuid, &uc) == UCALL_UNHANDLED) { - uint64_t vector = uc.args[0]; - - TEST_FAIL("Unexpected vectored event in guest (vector:0x%lx)", - vector); - } -} - -struct kvm_cpuid_entry2 *get_cpuid(struct kvm_cpuid2 *cpuid, uint32_t function, - uint32_t index) -{ - int i; - - for (i = 0; i < cpuid->nent; i++) { - struct kvm_cpuid_entry2 *cur = &cpuid->entries[i]; - - if (cur->function == function && cur->index == index) - return cur; - } - - TEST_FAIL("CPUID function 0x%x index 0x%x not found ", function, index); - - return NULL; -} - -bool set_cpuid(struct kvm_cpuid2 *cpuid, - struct kvm_cpuid_entry2 *ent) -{ - int i; - - for (i = 0; i < cpuid->nent; i++) { - struct kvm_cpuid_entry2 *cur = &cpuid->entries[i]; - - if (cur->function != ent->function || cur->index != ent->index) - continue; - - memcpy(cur, ent, sizeof(struct kvm_cpuid_entry2)); - return true; - } - - return false; -} - -uint64_t kvm_hypercall(uint64_t nr, uint64_t a0, uint64_t a1, uint64_t a2, - uint64_t a3) -{ - uint64_t r; - - asm volatile("vmcall" - : "=a"(r) - : "b"(a0), "c"(a1), "d"(a2), "S"(a3)); - return r; -} - -struct kvm_cpuid2 *kvm_get_supported_hv_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_or_exit(); - - ret = ioctl(kvm_fd, KVM_GET_SUPPORTED_HV_CPUID, cpuid); - TEST_ASSERT(ret == 0, "KVM_GET_SUPPORTED_HV_CPUID failed %d %d\n", - ret, errno); - - close(kvm_fd); - return cpuid; -} - -void vcpu_set_hv_cpuid(struct kvm_vm *vm, uint32_t vcpuid) -{ - static struct kvm_cpuid2 *cpuid_full; - struct kvm_cpuid2 *cpuid_sys, *cpuid_hv; - int i, nent = 0; - - if (!cpuid_full) { - cpuid_sys = kvm_get_supported_cpuid(); - cpuid_hv = kvm_get_supported_hv_cpuid(); - - cpuid_full = malloc(sizeof(*cpuid_full) + - (cpuid_sys->nent + cpuid_hv->nent) * - sizeof(struct kvm_cpuid_entry2)); - if (!cpuid_full) { - perror("malloc"); - abort(); - } - - /* Need to skip KVM CPUID leaves 0x400000xx */ - for (i = 0; i < cpuid_sys->nent; i++) { - if (cpuid_sys->entries[i].function >= 0x40000000 && - cpuid_sys->entries[i].function < 0x40000100) - continue; - cpuid_full->entries[nent] = cpuid_sys->entries[i]; - nent++; - } - - memcpy(&cpuid_full->entries[nent], cpuid_hv->entries, - cpuid_hv->nent * sizeof(struct kvm_cpuid_entry2)); - cpuid_full->nent = nent + cpuid_hv->nent; - } - - vcpu_set_cpuid(vm, vcpuid, cpuid_full); -} - -struct kvm_cpuid2 *vcpu_get_supported_hv_cpuid(struct kvm_vm *vm, uint32_t vcpuid) -{ - static struct kvm_cpuid2 *cpuid; - - cpuid = allocate_kvm_cpuid2(); - - vcpu_ioctl(vm, vcpuid, KVM_GET_SUPPORTED_HV_CPUID, cpuid); - - return cpuid; -} - -unsigned long vm_compute_max_gfn(struct kvm_vm *vm) -{ - const unsigned long num_ht_pages = 12 << (30 - vm->page_shift); /* 12 GiB */ - unsigned long ht_gfn, max_gfn, max_pfn; - uint32_t eax, ebx, ecx, edx, max_ext_leaf; - - max_gfn = (1ULL << (vm->pa_bits - vm->page_shift)) - 1; - - /* Avoid reserved HyperTransport region on AMD processors. */ - if (!is_amd_cpu()) - return max_gfn; - - /* On parts with <40 physical address bits, the area is fully hidden */ - if (vm->pa_bits < 40) - return max_gfn; - - /* Before family 17h, the HyperTransport area is just below 1T. */ - ht_gfn = (1 << 28) - num_ht_pages; - eax = 1; - ecx = 0; - cpuid(&eax, &ebx, &ecx, &edx); - if (x86_family(eax) < 0x17) - goto done; - - /* - * Otherwise it's at the top of the physical address space, possibly - * reduced due to SME by bits 11:6 of CPUID[0x8000001f].EBX. Use - * the old conservative value if MAXPHYADDR is not enumerated. - */ - eax = 0x80000000; - cpuid(&eax, &ebx, &ecx, &edx); - max_ext_leaf = eax; - if (max_ext_leaf < 0x80000008) - goto done; - - eax = 0x80000008; - cpuid(&eax, &ebx, &ecx, &edx); - max_pfn = (1ULL << ((eax & 0xff) - vm->page_shift)) - 1; - if (max_ext_leaf >= 0x8000001f) { - eax = 0x8000001f; - cpuid(&eax, &ebx, &ecx, &edx); - max_pfn >>= (ebx >> 6) & 0x3f; - } - - ht_gfn = max_pfn - num_ht_pages; -done: - return min(max_gfn, ht_gfn - 1); -} |