On Thu, Sep 14, 2023 at 5:05 PM Andrew Jones <ajones@xxxxxxxxxxxxxxxx> wrote:
>
> On Thu, Sep 14, 2023 at 09:37:02AM +0800, Haibo Xu wrote:
> > Move vcpu_has_ext to the processor.c and rename it to __vcpu_has_ext
> > 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 ++
> > .../testing/selftests/kvm/lib/riscv/processor.c | 9 +++++++++
> > tools/testing/selftests/kvm/riscv/get-reg-list.c | 16 +---------------
> > 3 files changed, 12 insertions(+), 15 deletions(-)
> >
> > diff --git a/tools/testing/selftests/kvm/include/riscv/processor.h b/tools/testing/selftests/kvm/include/riscv/processor.h
> > index 2c975d9cead2..7d5517648ea7 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..e527ad0abc30 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;
>
> I'd rather not assume that value will remain zero across a system call
> which fails. Let's write this as
>
> unsigned long value = 0;
> int ret;
>
> ret = __vcpu_get_reg(vcpu, RISCV_ISA_EXT_REG(ext), &value);
>
> return !ret && !!value;
>
Sure. Thanks for the suggestion!
> > +}
> > +
> > 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..0dcff823f287 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;
> > -}
> > -
> > void finalize_vcpu(struct kvm_vcpu *vcpu, struct vcpu_reg_list *c)
> > {
> > struct vcpu_reg_sublist *s;
> > @@ -77,7 +63,7 @@ void finalize_vcpu(struct kvm_vcpu *vcpu, struct vcpu_reg_list *c)
> > __vcpu_set_reg(vcpu, RISCV_ISA_EXT_REG(s->feature), 1);
> >
> > /* Double check whether the desired extension was enabled */
> > - __TEST_REQUIRE(vcpu_has_ext(vcpu, s->feature),
> > + __TEST_REQUIRE(__vcpu_has_ext(vcpu, s->feature),
> > "%s not available, skipping tests\n", s->name);
> > }
> > }
> > --
> > 2.34.1
> >
>
> Otherwise,
>
> Reviewed-by: Andrew Jones <ajones@xxxxxxxxxxxxxxxx>
>
> Thanks,
> drew
