Re: [PATCH v2 7/8] KVM: riscv: selftest: Change vcpu_has_ext to a common function

[Andrew Jones]

On Sat, Sep 02, 2023 at 08:59:29PM +0800, Haibo Xu wrote:
> Move vcpu_has_ext to the processor.c so that other test cases
> can use it for vCPU extension check.
> 
> Signed-off-by: Haibo Xu <haibo1.xu@xxxxxxxxx>
> ---
>  .../selftests/kvm/include/riscv/processor.h        |  2 ++
>  tools/testing/selftests/kvm/lib/riscv/processor.c  |  9 +++++++++
>  tools/testing/selftests/kvm/riscv/get-reg-list.c   | 14 --------------
>  3 files changed, 11 insertions(+), 14 deletions(-)
> 
> diff --git a/tools/testing/selftests/kvm/include/riscv/processor.h b/tools/testing/selftests/kvm/include/riscv/processor.h
> index d1e5d9f7ad45..6087c8fc263a 100644
> --- a/tools/testing/selftests/kvm/include/riscv/processor.h
> +++ b/tools/testing/selftests/kvm/include/riscv/processor.h
> @@ -42,6 +42,8 @@ static inline uint64_t __kvm_reg_id(uint64_t type, uint64_t idx,
>  #define RISCV_ISA_EXT_REG(idx)	__kvm_reg_id(KVM_REG_RISCV_ISA_EXT, \
>  					     idx, KVM_REG_SIZE_ULONG)
>  
> +bool vcpu_has_ext(struct kvm_vcpu *vcpu, int ext);
> +
>  struct ex_regs {
>  	unsigned long ra;
>  	unsigned long sp;
> diff --git a/tools/testing/selftests/kvm/lib/riscv/processor.c b/tools/testing/selftests/kvm/lib/riscv/processor.c
> index 39a1e9902dec..5ececa566f24 100644
> --- a/tools/testing/selftests/kvm/lib/riscv/processor.c
> +++ b/tools/testing/selftests/kvm/lib/riscv/processor.c
> @@ -15,6 +15,15 @@
>  
>  static vm_vaddr_t exception_handlers;
>  
> +bool vcpu_has_ext(struct kvm_vcpu *vcpu, int ext)
> +{
> +	unsigned long value = 0;
> +
> +	vcpu_get_reg(vcpu, RISCV_ISA_EXT_REG(ext), &value);
> +
> +	return !!value;
> +}
> +
>  static uint64_t page_align(struct kvm_vm *vm, uint64_t v)
>  {
>  	return (v + vm->page_size) & ~(vm->page_size - 1);
> diff --git a/tools/testing/selftests/kvm/riscv/get-reg-list.c b/tools/testing/selftests/kvm/riscv/get-reg-list.c
> index d8ecacd03ecf..c4028bf32e3f 100644
> --- a/tools/testing/selftests/kvm/riscv/get-reg-list.c
> +++ b/tools/testing/selftests/kvm/riscv/get-reg-list.c
> @@ -44,20 +44,6 @@ bool check_reject_set(int err)
>  	return err == EINVAL;
>  }
>  
> -static inline bool vcpu_has_ext(struct kvm_vcpu *vcpu, int ext)
> -{
> -	int ret;
> -	unsigned long value;
> -
> -	ret = __vcpu_get_reg(vcpu, RISCV_ISA_EXT_REG(ext), &value);
> -	if (ret) {
> -		printf("Failed to get ext %d", ext);
> -		return false;
> -	}
> -
> -	return !!value;

get-reg-list will now assert on get-reg when an extension isn't present,
rather than failing the __TEST_REQUIRE(), which would do a skip instead.
We need both the return false version and the assert version.

> -}
> -
>  void finalize_vcpu(struct kvm_vcpu *vcpu, struct vcpu_reg_list *c)
>  {
>  	struct vcpu_reg_sublist *s;
> -- 
> 2.34.1
>

Thanks,
drew