[PATCH v7 6/9] selftests: KVM: Add helper to check for register presence
From: Oliver Upton <hidden>
Date: 2021-08-16 00:30:22
Also in:
kvmarm, linux-arm-kernel
Subsystem:
kernel selftest framework, kernel virtual machine (kvm), the rest · Maintainers:
Shuah Khan, Paolo Bonzini, Linus Torvalds
The KVM_GET_REG_LIST vCPU ioctl returns a list of supported registers for a given vCPU. Add a helper to check if a register exists in the list of supported registers. Signed-off-by: Oliver Upton <redacted> Reviewed-by: Andrew Jones <redacted> --- .../testing/selftests/kvm/include/kvm_util.h | 2 ++ tools/testing/selftests/kvm/lib/kvm_util.c | 19 +++++++++++++++++++ 2 files changed, 21 insertions(+)
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index 1b3ef5757819..077082dd2ca7 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h@@ -215,6 +215,8 @@ void vcpu_fpu_get(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_fpu *fpu); void vcpu_fpu_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_fpu *fpu); + +bool vcpu_has_reg(struct kvm_vm *vm, uint32_t vcpuid, uint64_t reg_id); void vcpu_get_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg); void vcpu_set_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg); #ifdef __KVM_HAVE_VCPU_EVENTS
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 0fe66ca6139a..a5801d4ed37d 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c@@ -1823,6 +1823,25 @@ void vcpu_fpu_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_fpu *fpu) ret, errno, strerror(errno)); } +bool vcpu_has_reg(struct kvm_vm *vm, uint32_t vcpuid, uint64_t reg_id) +{ + struct kvm_reg_list *list; + bool ret = false; + uint64_t i; + + list = vcpu_get_reg_list(vm, vcpuid); + + for (i = 0; i < list->n; i++) { + if (list->reg[i] == reg_id) { + ret = true; + break; + } + } + + free(list); + return ret; +} + void vcpu_get_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg) { int ret;
--
2.33.0.rc1.237.g0d66db33f3-goog