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 | 81 |
1 files changed, 69 insertions, 12 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index d8288374078e..74a4c736c9ae 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -9,6 +9,7 @@ #include "test_util.h" #include "kvm_util.h" #include "processor.h" +#include "sev.h" #ifndef NUM_INTERRUPTS #define NUM_INTERRUPTS 256 @@ -157,6 +158,8 @@ static uint64_t *virt_create_upper_pte(struct kvm_vm *vm, { 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) @@ -170,10 +173,10 @@ static uint64_t *virt_create_upper_pte(struct kvm_vm *vm, * this level. */ TEST_ASSERT(current_level != target_level, - "Cannot create hugepage at level: %u, vaddr: 0x%lx\n", + "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\n", + "Cannot create page table at level: %u, vaddr: 0x%lx", current_level, vaddr); } return pte; @@ -200,6 +203,8 @@ void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, int level) "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 @@ -220,8 +225,17 @@ void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, int level) /* 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\n", vaddr); + "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) @@ -253,7 +267,7 @@ 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\n", current_level); + "Unexpected hugepage at level %d", current_level); *level = current_level; } @@ -265,6 +279,9 @@ uint64_t *__vm_get_page_table_entry(struct kvm_vm *vm, uint64_t vaddr, { 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); @@ -496,7 +513,7 @@ vm_paddr_t addr_arch_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva) * No need for a hugepage mask on the PTE, x86-64 requires the "unused" * address bits to be zero. */ - return PTE_GET_PA(*pte) | (gva & ~HUGEPAGE_MASK(level)); + 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) @@ -560,10 +577,23 @@ 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, - void *guest_code) +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; @@ -597,7 +627,6 @@ struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id, vcpu_regs_get(vcpu, ®s); regs.rflags = regs.rflags | 0x2; regs.rsp = stack_vaddr; - regs.rip = (unsigned long) guest_code; vcpu_regs_set(vcpu, ®s); /* Setup the MP state */ @@ -752,12 +781,21 @@ void vcpu_init_cpuid(struct kvm_vcpu *vcpu, const struct kvm_cpuid2 *cpuid) vcpu_set_cpuid(vcpu); } -void vcpu_set_cpuid_maxphyaddr(struct kvm_vcpu *vcpu, uint8_t maxphyaddr) +void vcpu_set_cpuid_property(struct kvm_vcpu *vcpu, + struct kvm_x86_cpu_property property, + uint32_t value) { - struct kvm_cpuid_entry2 *entry = vcpu_get_cpuid_entry(vcpu, 0x80000008); + 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; - entry->eax = (entry->eax & ~0xff) | maxphyaddr; 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) @@ -825,7 +863,7 @@ void vcpu_args_set(struct kvm_vcpu *vcpu, unsigned int num, ...) struct kvm_regs regs; TEST_ASSERT(num >= 1 && num <= 6, "Unsupported number of args,\n" - " num: %u\n", + " num: %u", num); va_start(ap, num); @@ -1041,6 +1079,14 @@ void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits) } } +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) { @@ -1299,3 +1345,14 @@ 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; +} |