| Message ID | 20240314232637.2538648-9-seanjc@google.com |
|---|---|
| State | New |
| Headers | show |
| Series | KVM: selftests: Clean up x86's DT initialization | expand |
Sean Christopherson <seanjc@google.com> writes: > Move x86's various descriptor table helpers in processor.c up above > kvm_arch_vm_post_create() and vcpu_setup() so that the helpers can be > made static and invoked from the aforementioned functions. > > No functional change intended. > > Signed-off-by: Sean Christopherson <seanjc@google.com> > --- > .../selftests/kvm/lib/x86_64/processor.c | 191 +++++++++--------- > 1 file changed, 95 insertions(+), 96 deletions(-) > > diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c > index eaeba907bb53..3640d3290f0a 100644 > --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c > +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c > @@ -540,6 +540,21 @@ static void kvm_setup_tss_64bit(struct kvm_vm *vm, struct kvm_segment *segp, > kvm_seg_fill_gdt_64bit(vm, segp); > } > > +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->arch.idt; > + sregs.idt.limit = NUM_INTERRUPTS * sizeof(struct idt_entry) - 1; > + sregs.gdt.base = vm->arch.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; > +} > + > static void vcpu_setup(struct kvm_vm *vm, struct kvm_vcpu *vcpu) > { > struct kvm_sregs sregs; > @@ -572,6 +587,86 @@ static void vcpu_setup(struct kvm_vm *vm, struct kvm_vcpu *vcpu) > vcpu_sregs_set(vcpu, &sregs); > } > > +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->arch.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->arch.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 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); > +} > + > void kvm_arch_vm_post_create(struct kvm_vm *vm) > { > vm_create_irqchip(vm); > @@ -1087,102 +1182,6 @@ void kvm_init_vm_address_properties(struct kvm_vm *vm) > } > } > > -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->arch.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->arch.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->arch.idt; > - sregs.idt.limit = NUM_INTERRUPTS * sizeof(struct idt_entry) - 1; > - sregs.gdt.base = vm->arch.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) > { > -- > 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 eaeba907bb53..3640d3290f0a 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -540,6 +540,21 @@ static void kvm_setup_tss_64bit(struct kvm_vm *vm, struct kvm_segment *segp, kvm_seg_fill_gdt_64bit(vm, segp); } +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->arch.idt; + sregs.idt.limit = NUM_INTERRUPTS * sizeof(struct idt_entry) - 1; + sregs.gdt.base = vm->arch.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; +} + static void vcpu_setup(struct kvm_vm *vm, struct kvm_vcpu *vcpu) { struct kvm_sregs sregs; @@ -572,6 +587,86 @@ static void vcpu_setup(struct kvm_vm *vm, struct kvm_vcpu *vcpu) vcpu_sregs_set(vcpu, &sregs); } +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->arch.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->arch.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 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); +} + void kvm_arch_vm_post_create(struct kvm_vm *vm) { vm_create_irqchip(vm); @@ -1087,102 +1182,6 @@ void kvm_init_vm_address_properties(struct kvm_vm *vm) } } -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->arch.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->arch.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->arch.idt; - sregs.idt.limit = NUM_INTERRUPTS * sizeof(struct idt_entry) - 1; - sregs.gdt.base = vm->arch.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) {
Move x86's various descriptor table helpers in processor.c up above kvm_arch_vm_post_create() and vcpu_setup() so that the helpers can be made static and invoked from the aforementioned functions. No functional change intended. Signed-off-by: Sean Christopherson <seanjc@google.com> --- .../selftests/kvm/lib/x86_64/processor.c | 191 +++++++++--------- 1 file changed, 95 insertions(+), 96 deletions(-)