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 | 1358 |
1 files changed, 0 insertions, 1358 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 74a4c736c9ae..000000000000 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ /dev/null @@ -1,1358 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * tools/testing/selftests/kvm/lib/x86_64/processor.c - * - * Copyright (C) 2018, Google LLC. - */ - -#include "linux/bitmap.h" -#include "test_util.h" -#include "kvm_util.h" -#include "processor.h" -#include "sev.h" - -#ifndef NUM_INTERRUPTS -#define NUM_INTERRUPTS 256 -#endif - -#define DEFAULT_CODE_SELECTOR 0x8 -#define DEFAULT_DATA_SELECTOR 0x10 - -#define MAX_NR_CPUID_ENTRIES 100 - -vm_vaddr_t exception_handlers; -bool host_cpu_is_amd; -bool host_cpu_is_intel; - -static 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); -} - -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); -} - -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]); -} - -static 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]); - } -} - -bool kvm_is_tdp_enabled(void) -{ - if (host_cpu_is_intel) - return get_kvm_intel_param_bool("ept"); - else - return get_kvm_amd_param_bool("npt"); -} - -void virt_arch_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 *parent_pte, - uint64_t vaddr, int level) -{ - uint64_t pt_gpa = PTE_GET_PA(*parent_pte); - uint64_t *page_table = addr_gpa2hva(vm, pt_gpa); - int index = (vaddr >> PG_LEVEL_SHIFT(level)) & 0x1ffu; - - TEST_ASSERT((*parent_pte & PTE_PRESENT_MASK) || parent_pte == &vm->pgd, - "Parent PTE (level %d) not PRESENT for gva: 0x%08lx", - level + 1, vaddr); - - return &page_table[index]; -} - -static uint64_t *virt_create_upper_pte(struct kvm_vm *vm, - uint64_t *parent_pte, - uint64_t vaddr, - uint64_t paddr, - int current_level, - int target_level) -{ - uint64_t *pte = virt_get_pte(vm, parent_pte, vaddr, current_level); - - paddr = vm_untag_gpa(vm, paddr); - - if (!(*pte & PTE_PRESENT_MASK)) { - *pte = PTE_PRESENT_MASK | PTE_WRITABLE_MASK; - if (current_level == target_level) - *pte |= PTE_LARGE_MASK | (paddr & PHYSICAL_PAGE_MASK); - else - *pte |= vm_alloc_page_table(vm) & PHYSICAL_PAGE_MASK; - } 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(current_level != target_level, - "Cannot create hugepage at level: %u, vaddr: 0x%lx", - current_level, vaddr); - TEST_ASSERT(!(*pte & PTE_LARGE_MASK), - "Cannot create page table at level: %u, vaddr: 0x%lx", - current_level, vaddr); - } - return pte; -} - -void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, int level) -{ - const uint64_t pg_size = PG_LEVEL_SIZE(level); - uint64_t *pml4e, *pdpe, *pde; - uint64_t *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); - TEST_ASSERT(vm_untag_gpa(vm, paddr) == paddr, - "Unexpected bits in paddr: %lx", paddr); - - /* - * Allocate upper level page tables, if not already present. Return - * early if a hugepage was created. - */ - pml4e = virt_create_upper_pte(vm, &vm->pgd, vaddr, paddr, PG_LEVEL_512G, level); - if (*pml4e & PTE_LARGE_MASK) - return; - - pdpe = virt_create_upper_pte(vm, pml4e, vaddr, paddr, PG_LEVEL_1G, level); - if (*pdpe & PTE_LARGE_MASK) - return; - - pde = virt_create_upper_pte(vm, pdpe, vaddr, paddr, PG_LEVEL_2M, level); - if (*pde & PTE_LARGE_MASK) - return; - - /* Fill in page table entry. */ - pte = virt_get_pte(vm, pde, vaddr, PG_LEVEL_4K); - TEST_ASSERT(!(*pte & PTE_PRESENT_MASK), - "PTE already present for 4k page at vaddr: 0x%lx", vaddr); - *pte = PTE_PRESENT_MASK | PTE_WRITABLE_MASK | (paddr & PHYSICAL_PAGE_MASK); - - /* - * Neither SEV nor TDX supports shared page tables, so only the final - * leaf PTE needs manually set the C/S-bit. - */ - if (vm_is_gpa_protected(vm, paddr)) - *pte |= vm->arch.c_bit; - else - *pte |= vm->arch.s_bit; -} - -void virt_arch_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) -{ - __virt_pg_map(vm, vaddr, paddr, PG_LEVEL_4K); -} - -void virt_map_level(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, - uint64_t nr_bytes, int level) -{ - uint64_t pg_size = PG_LEVEL_SIZE(level); - uint64_t nr_pages = nr_bytes / pg_size; - int i; - - TEST_ASSERT(nr_bytes % pg_size == 0, - "Region size not aligned: nr_bytes: 0x%lx, page size: 0x%lx", - nr_bytes, pg_size); - - for (i = 0; i < nr_pages; i++) { - __virt_pg_map(vm, vaddr, paddr, level); - - vaddr += pg_size; - paddr += pg_size; - } -} - -static bool vm_is_target_pte(uint64_t *pte, int *level, int current_level) -{ - if (*pte & PTE_LARGE_MASK) { - TEST_ASSERT(*level == PG_LEVEL_NONE || - *level == current_level, - "Unexpected hugepage at level %d", current_level); - *level = current_level; - } - - return *level == current_level; -} - -uint64_t *__vm_get_page_table_entry(struct kvm_vm *vm, uint64_t vaddr, - int *level) -{ - uint64_t *pml4e, *pdpe, *pde; - - TEST_ASSERT(!vm->arch.is_pt_protected, - "Walking page tables of protected guests is impossible"); - - TEST_ASSERT(*level >= PG_LEVEL_NONE && *level < PG_LEVEL_NUM, - "Invalid PG_LEVEL_* '%d'", *level); - - 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."); - - pml4e = virt_get_pte(vm, &vm->pgd, vaddr, PG_LEVEL_512G); - if (vm_is_target_pte(pml4e, level, PG_LEVEL_512G)) - return pml4e; - - pdpe = virt_get_pte(vm, pml4e, vaddr, PG_LEVEL_1G); - if (vm_is_target_pte(pdpe, level, PG_LEVEL_1G)) - return pdpe; - - pde = virt_get_pte(vm, pdpe, vaddr, PG_LEVEL_2M); - if (vm_is_target_pte(pde, level, PG_LEVEL_2M)) - return pde; - - return virt_get_pte(vm, pde, vaddr, PG_LEVEL_4K); -} - -uint64_t *vm_get_page_table_entry(struct kvm_vm *vm, uint64_t vaddr) -{ - int level = PG_LEVEL_4K; - - return __vm_get_page_table_entry(vm, vaddr, &level); -} - -void virt_arch_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent) -{ - uint64_t *pml4e, *pml4e_start; - uint64_t *pdpe, *pdpe_start; - uint64_t *pde, *pde_start; - uint64_t *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 = (uint64_t *) addr_gpa2hva(vm, vm->pgd); - for (uint16_t n1 = 0; n1 <= 0x1ffu; n1++) { - pml4e = &pml4e_start[n1]; - if (!(*pml4e & PTE_PRESENT_MASK)) - continue; - fprintf(stream, "%*spml4e 0x%-3zx %p 0x%-12lx 0x%-10llx %u " - " %u\n", - indent, "", - pml4e - pml4e_start, pml4e, - addr_hva2gpa(vm, pml4e), PTE_GET_PFN(*pml4e), - !!(*pml4e & PTE_WRITABLE_MASK), !!(*pml4e & PTE_NX_MASK)); - - pdpe_start = addr_gpa2hva(vm, *pml4e & PHYSICAL_PAGE_MASK); - for (uint16_t n2 = 0; n2 <= 0x1ffu; n2++) { - pdpe = &pdpe_start[n2]; - if (!(*pdpe & PTE_PRESENT_MASK)) - continue; - fprintf(stream, "%*spdpe 0x%-3zx %p 0x%-12lx 0x%-10llx " - "%u %u\n", - indent, "", - pdpe - pdpe_start, pdpe, - addr_hva2gpa(vm, pdpe), - PTE_GET_PFN(*pdpe), !!(*pdpe & PTE_WRITABLE_MASK), - !!(*pdpe & PTE_NX_MASK)); - - pde_start = addr_gpa2hva(vm, *pdpe & PHYSICAL_PAGE_MASK); - for (uint16_t n3 = 0; n3 <= 0x1ffu; n3++) { - pde = &pde_start[n3]; - if (!(*pde & PTE_PRESENT_MASK)) - continue; - fprintf(stream, "%*spde 0x%-3zx %p " - "0x%-12lx 0x%-10llx %u %u\n", - indent, "", pde - pde_start, pde, - addr_hva2gpa(vm, pde), - PTE_GET_PFN(*pde), !!(*pde & PTE_WRITABLE_MASK), - !!(*pde & PTE_NX_MASK)); - - pte_start = addr_gpa2hva(vm, *pde & PHYSICAL_PAGE_MASK); - for (uint16_t n4 = 0; n4 <= 0x1ffu; n4++) { - pte = &pte_start[n4]; - if (!(*pte & PTE_PRESENT_MASK)) - continue; - fprintf(stream, "%*spte 0x%-3zx %p " - "0x%-12lx 0x%-10llx %u %u " - " %u 0x%-10lx\n", - indent, "", - pte - pte_start, pte, - addr_hva2gpa(vm, pte), - PTE_GET_PFN(*pte), - !!(*pte & PTE_WRITABLE_MASK), - !!(*pte & PTE_NX_MASK), - !!(*pte & PTE_DIRTY_MASK), - ((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_arch_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva) -{ - int level = PG_LEVEL_NONE; - uint64_t *pte = __vm_get_page_table_entry(vm, gva, &level); - - TEST_ASSERT(*pte & PTE_PRESENT_MASK, - "Leaf PTE not PRESENT for gva: 0x%08lx", gva); - - /* - * No need for a hugepage mask on the PTE, x86-64 requires the "unused" - * address bits to be zero. - */ - return vm_untag_gpa(vm, PTE_GET_PA(*pte)) | (gva & ~HUGEPAGE_MASK(level)); -} - -static void kvm_setup_gdt(struct kvm_vm *vm, struct kvm_dtable *dt) -{ - if (!vm->gdt) - vm->gdt = __vm_vaddr_alloc_page(vm, MEM_REGION_DATA); - - 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, MEM_REGION_DATA); - - 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, struct kvm_vcpu *vcpu) -{ - struct kvm_sregs sregs; - - /* Set mode specific system register values. */ - vcpu_sregs_get(vcpu, &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(vcpu, &sregs); -} - -void kvm_arch_vm_post_create(struct kvm_vm *vm) -{ - vm_create_irqchip(vm); - sync_global_to_guest(vm, host_cpu_is_intel); - sync_global_to_guest(vm, host_cpu_is_amd); - - if (vm->subtype == VM_SUBTYPE_SEV) - sev_vm_init(vm); - else if (vm->subtype == VM_SUBTYPE_SEV_ES) - sev_es_vm_init(vm); -} - -void vcpu_arch_set_entry_point(struct kvm_vcpu *vcpu, void *guest_code) -{ - struct kvm_regs regs; - - vcpu_regs_get(vcpu, ®s); - regs.rip = (unsigned long) guest_code; - vcpu_regs_set(vcpu, ®s); -} - -struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id) -{ - struct kvm_mp_state mp_state; - struct kvm_regs regs; - vm_vaddr_t stack_vaddr; - struct kvm_vcpu *vcpu; - - stack_vaddr = __vm_vaddr_alloc(vm, DEFAULT_STACK_PGS * getpagesize(), - DEFAULT_GUEST_STACK_VADDR_MIN, - MEM_REGION_DATA); - - stack_vaddr += DEFAULT_STACK_PGS * getpagesize(); - - /* - * Align stack to match calling sequence requirements in section "The - * Stack Frame" of the System V ABI AMD64 Architecture Processor - * Supplement, which requires the value (%rsp + 8) to be a multiple of - * 16 when control is transferred to the function entry point. - * - * If this code is ever used to launch a vCPU with 32-bit entry point it - * may need to subtract 4 bytes instead of 8 bytes. - */ - TEST_ASSERT(IS_ALIGNED(stack_vaddr, PAGE_SIZE), - "__vm_vaddr_alloc() did not provide a page-aligned address"); - stack_vaddr -= 8; - - vcpu = __vm_vcpu_add(vm, vcpu_id); - vcpu_init_cpuid(vcpu, kvm_get_supported_cpuid()); - vcpu_setup(vm, vcpu); - - /* Setup guest general purpose registers */ - vcpu_regs_get(vcpu, ®s); - regs.rflags = regs.rflags | 0x2; - regs.rsp = stack_vaddr; - vcpu_regs_set(vcpu, ®s); - - /* Setup the MP state */ - mp_state.mp_state = 0; - vcpu_mp_state_set(vcpu, &mp_state); - - return vcpu; -} - -struct kvm_vcpu *vm_arch_vcpu_recreate(struct kvm_vm *vm, uint32_t vcpu_id) -{ - struct kvm_vcpu *vcpu = __vm_vcpu_add(vm, vcpu_id); - - vcpu_init_cpuid(vcpu, kvm_get_supported_cpuid()); - - return vcpu; -} - -void vcpu_arch_free(struct kvm_vcpu *vcpu) -{ - if (vcpu->cpuid) - free(vcpu->cpuid); -} - -/* Do not use kvm_supported_cpuid directly except for validity checks. */ -static void *kvm_supported_cpuid; - -const struct kvm_cpuid2 *kvm_get_supported_cpuid(void) -{ - int kvm_fd; - - if (kvm_supported_cpuid) - return kvm_supported_cpuid; - - kvm_supported_cpuid = allocate_kvm_cpuid2(MAX_NR_CPUID_ENTRIES); - kvm_fd = open_kvm_dev_path_or_exit(); - - kvm_ioctl(kvm_fd, KVM_GET_SUPPORTED_CPUID, - (struct kvm_cpuid2 *)kvm_supported_cpuid); - - close(kvm_fd); - return kvm_supported_cpuid; -} - -static uint32_t __kvm_cpu_has(const struct kvm_cpuid2 *cpuid, - uint32_t function, uint32_t index, - uint8_t reg, uint8_t lo, uint8_t hi) -{ - const struct kvm_cpuid_entry2 *entry; - int i; - - for (i = 0; i < cpuid->nent; i++) { - entry = &cpuid->entries[i]; - - /* - * The output registers in kvm_cpuid_entry2 are in alphabetical - * order, but kvm_x86_cpu_feature matches that mess, so yay - * pointer shenanigans! - */ - if (entry->function == function && entry->index == index) - return ((&entry->eax)[reg] & GENMASK(hi, lo)) >> lo; - } - - return 0; -} - -bool kvm_cpuid_has(const struct kvm_cpuid2 *cpuid, - struct kvm_x86_cpu_feature feature) -{ - return __kvm_cpu_has(cpuid, feature.function, feature.index, - feature.reg, feature.bit, feature.bit); -} - -uint32_t kvm_cpuid_property(const struct kvm_cpuid2 *cpuid, - struct kvm_x86_cpu_property property) -{ - return __kvm_cpu_has(cpuid, property.function, property.index, - property.reg, property.lo_bit, property.hi_bit); -} - -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 = __kvm_ioctl(kvm_fd, KVM_GET_MSRS, &buffer.header); - TEST_ASSERT(r == 1, KVM_IOCTL_ERROR(KVM_GET_MSRS, r)); - - close(kvm_fd); - return buffer.entry.data; -} - -void __vm_xsave_require_permission(uint64_t xfeature, const char *name) -{ - int kvm_fd; - u64 bitmask; - long rc; - struct kvm_device_attr attr = { - .group = 0, - .attr = KVM_X86_XCOMP_GUEST_SUPP, - .addr = (unsigned long) &bitmask, - }; - - TEST_ASSERT(!kvm_supported_cpuid, - "kvm_get_supported_cpuid() cannot be used before ARCH_REQ_XCOMP_GUEST_PERM"); - - TEST_ASSERT(is_power_of_2(xfeature), - "Dynamic XFeatures must be enabled one at a time"); - - kvm_fd = open_kvm_dev_path_or_exit(); - rc = __kvm_ioctl(kvm_fd, KVM_GET_DEVICE_ATTR, &attr); - close(kvm_fd); - - if (rc == -1 && (errno == ENXIO || errno == EINVAL)) - __TEST_REQUIRE(0, "KVM_X86_XCOMP_GUEST_SUPP not supported"); - - TEST_ASSERT(rc == 0, "KVM_GET_DEVICE_ATTR(0, KVM_X86_XCOMP_GUEST_SUPP) error: %ld", rc); - - __TEST_REQUIRE(bitmask & xfeature, - "Required XSAVE feature '%s' not supported", name); - - TEST_REQUIRE(!syscall(SYS_arch_prctl, ARCH_REQ_XCOMP_GUEST_PERM, ilog2(xfeature))); - - 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, - "'%s' (0x%lx) not permitted after prctl(ARCH_REQ_XCOMP_GUEST_PERM) permitted=0x%lx", - name, xfeature, bitmask); -} - -void vcpu_init_cpuid(struct kvm_vcpu *vcpu, const struct kvm_cpuid2 *cpuid) -{ - TEST_ASSERT(cpuid != vcpu->cpuid, "@cpuid can't be the vCPU's CPUID"); - - /* Allow overriding the default CPUID. */ - if (vcpu->cpuid && vcpu->cpuid->nent < cpuid->nent) { - free(vcpu->cpuid); - vcpu->cpuid = NULL; - } - - if (!vcpu->cpuid) - vcpu->cpuid = allocate_kvm_cpuid2(cpuid->nent); - - memcpy(vcpu->cpuid, cpuid, kvm_cpuid2_size(cpuid->nent)); - vcpu_set_cpuid(vcpu); -} - -void vcpu_set_cpuid_property(struct kvm_vcpu *vcpu, - struct kvm_x86_cpu_property property, - uint32_t value) -{ - struct kvm_cpuid_entry2 *entry; - - entry = __vcpu_get_cpuid_entry(vcpu, property.function, property.index); - - (&entry->eax)[property.reg] &= ~GENMASK(property.hi_bit, property.lo_bit); - (&entry->eax)[property.reg] |= value << property.lo_bit; - - vcpu_set_cpuid(vcpu); - - /* Sanity check that @value doesn't exceed the bounds in any way. */ - TEST_ASSERT_EQ(kvm_cpuid_property(vcpu->cpuid, property), value); -} - -void vcpu_clear_cpuid_entry(struct kvm_vcpu *vcpu, uint32_t function) -{ - struct kvm_cpuid_entry2 *entry = vcpu_get_cpuid_entry(vcpu, function); - - entry->eax = 0; - entry->ebx = 0; - entry->ecx = 0; - entry->edx = 0; - vcpu_set_cpuid(vcpu); -} - -void vcpu_set_or_clear_cpuid_feature(struct kvm_vcpu *vcpu, - struct kvm_x86_cpu_feature feature, - bool set) -{ - struct kvm_cpuid_entry2 *entry; - u32 *reg; - - entry = __vcpu_get_cpuid_entry(vcpu, feature.function, feature.index); - reg = (&entry->eax) + feature.reg; - - if (set) - *reg |= BIT(feature.bit); - else - *reg &= ~BIT(feature.bit); - - vcpu_set_cpuid(vcpu); -} - -uint64_t vcpu_get_msr(struct kvm_vcpu *vcpu, uint64_t msr_index) -{ - struct { - struct kvm_msrs header; - struct kvm_msr_entry entry; - } buffer = {}; - - buffer.header.nmsrs = 1; - buffer.entry.index = msr_index; - - vcpu_msrs_get(vcpu, &buffer.header); - - return buffer.entry.data; -} - -int _vcpu_set_msr(struct kvm_vcpu *vcpu, uint64_t msr_index, uint64_t msr_value) -{ - struct { - struct kvm_msrs header; - struct kvm_msr_entry entry; - } buffer = {}; - - memset(&buffer, 0, sizeof(buffer)); - buffer.header.nmsrs = 1; - buffer.entry.index = msr_index; - buffer.entry.data = msr_value; - - return __vcpu_ioctl(vcpu, KVM_SET_MSRS, &buffer.header); -} - -void vcpu_args_set(struct kvm_vcpu *vcpu, unsigned int num, ...) -{ - va_list ap; - struct kvm_regs regs; - - TEST_ASSERT(num >= 1 && num <= 6, "Unsupported number of args,\n" - " num: %u", - num); - - va_start(ap, num); - vcpu_regs_get(vcpu, ®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(vcpu, ®s); - va_end(ap); -} - -void vcpu_arch_dump(FILE *stream, struct kvm_vcpu *vcpu, uint8_t indent) -{ - struct kvm_regs regs; - struct kvm_sregs sregs; - - fprintf(stream, "%*svCPU ID: %u\n", indent, "", vcpu->id); - - fprintf(stream, "%*sregs:\n", indent + 2, ""); - vcpu_regs_get(vcpu, ®s); - regs_dump(stream, ®s, indent + 4); - - fprintf(stream, "%*ssregs:\n", indent + 2, ""); - vcpu_sregs_get(vcpu, &sregs); - sregs_dump(stream, &sregs, indent + 4); -} - -static struct kvm_msr_list *__kvm_get_msr_index_list(bool feature_msrs) -{ - struct kvm_msr_list *list; - struct kvm_msr_list nmsrs; - int kvm_fd, r; - - kvm_fd = open_kvm_dev_path_or_exit(); - - nmsrs.nmsrs = 0; - if (!feature_msrs) - r = __kvm_ioctl(kvm_fd, KVM_GET_MSR_INDEX_LIST, &nmsrs); - else - r = __kvm_ioctl(kvm_fd, KVM_GET_MSR_FEATURE_INDEX_LIST, &nmsrs); - - TEST_ASSERT(r == -1 && errno == E2BIG, - "Expected -E2BIG, got rc: %i errno: %i (%s)", - r, errno, strerror(errno)); - - list = malloc(sizeof(*list) + nmsrs.nmsrs * sizeof(list->indices[0])); - TEST_ASSERT(list, "-ENOMEM when allocating MSR index list"); - list->nmsrs = nmsrs.nmsrs; - - if (!feature_msrs) - kvm_ioctl(kvm_fd, KVM_GET_MSR_INDEX_LIST, list); - else - kvm_ioctl(kvm_fd, KVM_GET_MSR_FEATURE_INDEX_LIST, list); - close(kvm_fd); - - TEST_ASSERT(list->nmsrs == nmsrs.nmsrs, - "Number of MSRs in list changed, was %d, now %d", - nmsrs.nmsrs, list->nmsrs); - return list; -} - -const struct kvm_msr_list *kvm_get_msr_index_list(void) -{ - static const struct kvm_msr_list *list; - - if (!list) - list = __kvm_get_msr_index_list(false); - return list; -} - - -const struct kvm_msr_list *kvm_get_feature_msr_index_list(void) -{ - static const struct kvm_msr_list *list; - - if (!list) - list = __kvm_get_msr_index_list(true); - return list; -} - -bool kvm_msr_is_in_save_restore_list(uint32_t msr_index) -{ - const struct kvm_msr_list *list = kvm_get_msr_index_list(); - int i; - - for (i = 0; i < list->nmsrs; ++i) { - if (list->indices[i] == msr_index) - return true; - } - - return false; -} - -static void vcpu_save_xsave_state(struct kvm_vcpu *vcpu, - struct kvm_x86_state *state) -{ - int size = vm_check_cap(vcpu->vm, KVM_CAP_XSAVE2); - - if (size) { - state->xsave = malloc(size); - vcpu_xsave2_get(vcpu, state->xsave); - } else { - state->xsave = malloc(sizeof(struct kvm_xsave)); - vcpu_xsave_get(vcpu, state->xsave); - } -} - -struct kvm_x86_state *vcpu_save_state(struct kvm_vcpu *vcpu) -{ - const struct kvm_msr_list *msr_list = kvm_get_msr_index_list(); - struct kvm_x86_state *state; - int 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(vcpu); - - state = malloc(sizeof(*state) + msr_list->nmsrs * sizeof(state->msrs.entries[0])); - TEST_ASSERT(state, "-ENOMEM when allocating kvm state"); - - vcpu_events_get(vcpu, &state->events); - vcpu_mp_state_get(vcpu, &state->mp_state); - vcpu_regs_get(vcpu, &state->regs); - vcpu_save_xsave_state(vcpu, state); - - if (kvm_has_cap(KVM_CAP_XCRS)) - vcpu_xcrs_get(vcpu, &state->xcrs); - - vcpu_sregs_get(vcpu, &state->sregs); - - if (nested_size) { - state->nested.size = sizeof(state->nested_); - - vcpu_nested_state_get(vcpu, &state->nested); - 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 = msr_list->nmsrs; - for (i = 0; i < msr_list->nmsrs; i++) - state->msrs.entries[i].index = msr_list->indices[i]; - vcpu_msrs_get(vcpu, &state->msrs); - - vcpu_debugregs_get(vcpu, &state->debugregs); - - return state; -} - -void vcpu_load_state(struct kvm_vcpu *vcpu, struct kvm_x86_state *state) -{ - vcpu_sregs_set(vcpu, &state->sregs); - vcpu_msrs_set(vcpu, &state->msrs); - - if (kvm_has_cap(KVM_CAP_XCRS)) - vcpu_xcrs_set(vcpu, &state->xcrs); - - vcpu_xsave_set(vcpu, state->xsave); - vcpu_events_set(vcpu, &state->events); - vcpu_mp_state_set(vcpu, &state->mp_state); - vcpu_debugregs_set(vcpu, &state->debugregs); - vcpu_regs_set(vcpu, &state->regs); - - if (state->nested.size) - vcpu_nested_state_set(vcpu, &state->nested); -} - -void kvm_x86_state_cleanup(struct kvm_x86_state *state) -{ - free(state->xsave); - free(state); -} - -void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits) -{ - if (!kvm_cpu_has_p(X86_PROPERTY_MAX_PHY_ADDR)) { - *pa_bits = kvm_cpu_has(X86_FEATURE_PAE) ? 36 : 32; - *va_bits = 32; - } else { - *pa_bits = kvm_cpu_property(X86_PROPERTY_MAX_PHY_ADDR); - *va_bits = kvm_cpu_property(X86_PROPERTY_MAX_VIRT_ADDR); - } -} - -void kvm_init_vm_address_properties(struct kvm_vm *vm) -{ - if (vm->subtype == VM_SUBTYPE_SEV || vm->subtype == VM_SUBTYPE_SEV_ES) { - vm->arch.c_bit = BIT_ULL(this_cpu_property(X86_PROPERTY_SEV_C_BIT)); - vm->gpa_tag_mask = vm->arch.c_bit; - } -} - -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; -} - - -static bool kvm_fixup_exception(struct ex_regs *regs) -{ - if (regs->r9 != KVM_EXCEPTION_MAGIC || regs->rip != regs->r10) - return false; - - if (regs->vector == DE_VECTOR) - return false; - - regs->rip = regs->r11; - regs->r9 = regs->vector; - regs->r10 = regs->error_code; - return true; -} - -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; - } - - if (kvm_fixup_exception(regs)) - return; - - ucall_assert(UCALL_UNHANDLED, - "Unhandled exception in guest", __FILE__, __LINE__, - "Unhandled exception '0x%lx' at guest RIP '0x%lx'", - regs->vector, regs->rip); -} - -void vm_init_descriptor_tables(struct kvm_vm *vm) -{ - extern void *idt_handlers; - int i; - - vm->idt = __vm_vaddr_alloc_page(vm, MEM_REGION_DATA); - vm->handlers = __vm_vaddr_alloc_page(vm, MEM_REGION_DATA); - /* 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_vcpu *vcpu) -{ - struct kvm_vm *vm = vcpu->vm; - struct kvm_sregs sregs; - - vcpu_sregs_get(vcpu, &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(vcpu, &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_vcpu *vcpu) -{ - struct ucall uc; - - if (get_ucall(vcpu, &uc) == UCALL_UNHANDLED) - REPORT_GUEST_ASSERT(uc); -} - -const struct kvm_cpuid_entry2 *get_cpuid_entry(const struct kvm_cpuid2 *cpuid, - uint32_t function, uint32_t index) -{ - int i; - - for (i = 0; i < cpuid->nent; i++) { - if (cpuid->entries[i].function == function && - cpuid->entries[i].index == index) - return &cpuid->entries[i]; - } - - TEST_FAIL("CPUID function 0x%x index 0x%x not found ", function, index); - - return NULL; -} - -#define X86_HYPERCALL(inputs...) \ -({ \ - uint64_t r; \ - \ - asm volatile("test %[use_vmmcall], %[use_vmmcall]\n\t" \ - "jnz 1f\n\t" \ - "vmcall\n\t" \ - "jmp 2f\n\t" \ - "1: vmmcall\n\t" \ - "2:" \ - : "=a"(r) \ - : [use_vmmcall] "r" (host_cpu_is_amd), inputs); \ - \ - r; \ -}) - -uint64_t kvm_hypercall(uint64_t nr, uint64_t a0, uint64_t a1, uint64_t a2, - uint64_t a3) -{ - return X86_HYPERCALL("a"(nr), "b"(a0), "c"(a1), "d"(a2), "S"(a3)); -} - -uint64_t __xen_hypercall(uint64_t nr, uint64_t a0, void *a1) -{ - return X86_HYPERCALL("a"(nr), "D"(a0), "S"(a1)); -} - -void xen_hypercall(uint64_t nr, uint64_t a0, void *a1) -{ - GUEST_ASSERT(!__xen_hypercall(nr, a0, a1)); -} - -const struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(void) -{ - static struct kvm_cpuid2 *cpuid; - int kvm_fd; - - if (cpuid) - return cpuid; - - cpuid = allocate_kvm_cpuid2(MAX_NR_CPUID_ENTRIES); - kvm_fd = open_kvm_dev_path_or_exit(); - - kvm_ioctl(kvm_fd, KVM_GET_SUPPORTED_HV_CPUID, cpuid); - - close(kvm_fd); - return cpuid; -} - -void vcpu_set_hv_cpuid(struct kvm_vcpu *vcpu) -{ - static struct kvm_cpuid2 *cpuid_full; - const 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 = allocate_kvm_cpuid2(cpuid_sys->nent + cpuid_hv->nent); - 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_init_cpuid(vcpu, cpuid_full); -} - -const struct kvm_cpuid2 *vcpu_get_supported_hv_cpuid(struct kvm_vcpu *vcpu) -{ - struct kvm_cpuid2 *cpuid = allocate_kvm_cpuid2(MAX_NR_CPUID_ENTRIES); - - vcpu_ioctl(vcpu, 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; - uint8_t maxphyaddr; - - max_gfn = (1ULL << (vm->pa_bits - vm->page_shift)) - 1; - - /* Avoid reserved HyperTransport region on AMD processors. */ - if (!host_cpu_is_amd) - 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; - if (this_cpu_family() < 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. - */ - if (!this_cpu_has_p(X86_PROPERTY_MAX_PHY_ADDR)) - goto done; - - maxphyaddr = this_cpu_property(X86_PROPERTY_MAX_PHY_ADDR); - max_pfn = (1ULL << (maxphyaddr - vm->page_shift)) - 1; - - if (this_cpu_has_p(X86_PROPERTY_PHYS_ADDR_REDUCTION)) - max_pfn >>= this_cpu_property(X86_PROPERTY_PHYS_ADDR_REDUCTION); - - ht_gfn = max_pfn - num_ht_pages; -done: - return min(max_gfn, ht_gfn - 1); -} - -/* Returns true if kvm_intel was loaded with unrestricted_guest=1. */ -bool vm_is_unrestricted_guest(struct kvm_vm *vm) -{ - /* Ensure that a KVM vendor-specific module is loaded. */ - if (vm == NULL) - close(open_kvm_dev_path_or_exit()); - - return get_kvm_intel_param_bool("unrestricted_guest"); -} - -void kvm_selftest_arch_init(void) -{ - host_cpu_is_intel = this_cpu_is_intel(); - host_cpu_is_amd = this_cpu_is_amd(); -} - -bool sys_clocksource_is_based_on_tsc(void) -{ - char *clk_name = sys_get_cur_clocksource(); - bool ret = !strcmp(clk_name, "tsc\n") || - !strcmp(clk_name, "hyperv_clocksource_tsc_page\n"); - - free(clk_name); - - return ret; -} |