| Message ID | 20240314232637.2538648-17-seanjc@google.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: selftests: Clean up x86's DT initialization | expand |
Sean Christopherson <seanjc@google.com> writes: > Add a proper #define for the TSS selector instead of open coding 0x18 and > hoping future developers don't use that selector for something else. > > Opportunistically rename the code and data selector macros to shorten the > names, align the naming with the kernel's scheme, and capture that they > are *kernel* segments. > > Signed-off-by: Sean Christopherson <seanjc@google.com> > --- > .../selftests/kvm/lib/x86_64/processor.c | 18 +++++++++--------- > 1 file changed, 9 insertions(+), 9 deletions(-) > > diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c > index 03b9387a1d2e..67235013f6f9 100644 > --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c > +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c > @@ -15,8 +15,9 @@ > #define NUM_INTERRUPTS 256 > #endif > > -#define DEFAULT_CODE_SELECTOR 0x8 > -#define DEFAULT_DATA_SELECTOR 0x10 > +#define KERNEL_CS 0x8 > +#define KERNEL_DS 0x10 > +#define KERNEL_TSS 0x18 > > #define MAX_NR_CPUID_ENTRIES 100 > > @@ -547,11 +548,11 @@ static void vcpu_init_sregs(struct kvm_vm *vm, struct kvm_vcpu *vcpu) > 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_seg_set_kernel_data_64bit(NULL, DEFAULT_DATA_SELECTOR, &sregs.gs); > - kvm_setup_tss_64bit(vm, &sregs.tr, 0x18); > + kvm_seg_set_kernel_code_64bit(vm, KERNEL_CS, &sregs.cs); > + kvm_seg_set_kernel_data_64bit(vm, KERNEL_DS, &sregs.ds); > + kvm_seg_set_kernel_data_64bit(vm, KERNEL_DS, &sregs.es); > + kvm_seg_set_kernel_data_64bit(NULL, KERNEL_DS, &sregs.gs); > + kvm_setup_tss_64bit(vm, &sregs.tr, KERNEL_TSS); > > sregs.cr3 = vm->pgd; > vcpu_sregs_set(vcpu, &sregs); > @@ -620,8 +621,7 @@ static void vm_init_descriptor_tables(struct kvm_vm *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); > + set_idt_entry(vm, i, (unsigned long)(&idt_handlers)[i], 0, KERNEL_CS); > > *(vm_vaddr_t *)addr_gva2hva(vm, (vm_vaddr_t)(&exception_handlers)) = vm->handlers; > } > -- > 2.44.0.291.gc1ea87d7ee-goog Reviewed-by: Ackerley Tng <ackerleytng@google.com>
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index 03b9387a1d2e..67235013f6f9 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -15,8 +15,9 @@ #define NUM_INTERRUPTS 256 #endif -#define DEFAULT_CODE_SELECTOR 0x8 -#define DEFAULT_DATA_SELECTOR 0x10 +#define KERNEL_CS 0x8 +#define KERNEL_DS 0x10 +#define KERNEL_TSS 0x18 #define MAX_NR_CPUID_ENTRIES 100 @@ -547,11 +548,11 @@ static void vcpu_init_sregs(struct kvm_vm *vm, struct kvm_vcpu *vcpu) 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_seg_set_kernel_data_64bit(NULL, DEFAULT_DATA_SELECTOR, &sregs.gs); - kvm_setup_tss_64bit(vm, &sregs.tr, 0x18); + kvm_seg_set_kernel_code_64bit(vm, KERNEL_CS, &sregs.cs); + kvm_seg_set_kernel_data_64bit(vm, KERNEL_DS, &sregs.ds); + kvm_seg_set_kernel_data_64bit(vm, KERNEL_DS, &sregs.es); + kvm_seg_set_kernel_data_64bit(NULL, KERNEL_DS, &sregs.gs); + kvm_setup_tss_64bit(vm, &sregs.tr, KERNEL_TSS); sregs.cr3 = vm->pgd; vcpu_sregs_set(vcpu, &sregs); @@ -620,8 +621,7 @@ static void vm_init_descriptor_tables(struct kvm_vm *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); + set_idt_entry(vm, i, (unsigned long)(&idt_handlers)[i], 0, KERNEL_CS); *(vm_vaddr_t *)addr_gva2hva(vm, (vm_vaddr_t)(&exception_handlers)) = vm->handlers; }
Add a proper #define for the TSS selector instead of open coding 0x18 and hoping future developers don't use that selector for something else. Opportunistically rename the code and data selector macros to shorten the names, align the naming with the kernel's scheme, and capture that they are *kernel* segments. Signed-off-by: Sean Christopherson <seanjc@google.com> --- .../selftests/kvm/lib/x86_64/processor.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-)