This allows initializing sregs without setting vCPU registers in KVM.
No functional change intended.
Signed-off-by: Ackerley Tng ackerleytng@google.com --- .../selftests/kvm/include/x86_64/processor.h | 2 + .../selftests/kvm/lib/x86_64/processor.c | 39 ++++++++++--------- 2 files changed, 23 insertions(+), 18 deletions(-)
diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h index e8ca0d8a6a7e0..74e0d3698f30c 100644 --- a/tools/testing/selftests/kvm/include/x86_64/processor.h +++ b/tools/testing/selftests/kvm/include/x86_64/processor.h @@ -644,6 +644,8 @@ const struct kvm_cpuid_entry2 *get_cpuid_entry(const struct kvm_cpuid2 *cpuid, void vcpu_init_cpuid(struct kvm_vcpu *vcpu, const struct kvm_cpuid2 *cpuid); void vcpu_set_hv_cpuid(struct kvm_vcpu *vcpu);
+void vcpu_setup_mode_sregs(struct kvm_vm *vm, struct kvm_sregs *sregs); + static inline struct kvm_cpuid_entry2 *__vcpu_get_cpuid_entry(struct kvm_vcpu *vcpu, uint32_t function, uint32_t index) diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index ed811181320de..1bb07d3c025b0 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -589,35 +589,38 @@ static void kvm_setup_tss_64bit(struct kvm_vm *vm, struct kvm_segment *segp, kvm_seg_fill_gdt_64bit(vm, segp); }
-static void vcpu_setup(struct kvm_vm *vm, struct kvm_vcpu *vcpu) +void vcpu_setup_mode_sregs(struct kvm_vm *vm, struct kvm_sregs *sregs) { - struct kvm_sregs sregs; - - /* Set mode specific system register values. */ - vcpu_sregs_get(vcpu, &sregs); - - sregs.idt.limit = 0; + sregs->idt.limit = 0;
- kvm_setup_gdt(vm, &sregs.gdt); + 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); + 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; + sregs->cr3 = vm->pgd; +} + +static void vcpu_setup(struct kvm_vm *vm, struct kvm_vcpu *vcpu) +{ + struct kvm_sregs sregs; + + vcpu_sregs_get(vcpu, &sregs); + vcpu_setup_mode_sregs(vm, &sregs); vcpu_sregs_set(vcpu, &sregs); }