Thanks a lot!
On Tue, Jun 27, 2023 at 5:16 PM Andrew Jones <ajones@xxxxxxxxxxxxxxxx> wrote:
>
> On Fri, Jun 23, 2023 at 06:40:13PM +0800, Haibo Xu wrote:
> > Disable all vcpu extensions which were enabled by default
> > if they were available in the risc-v host, and only enable
> > the desired one for a vcpu_config.
> >
> > Suggested-by: Andrew Jones <ajones@xxxxxxxxxxxxxxxx>
> > Signed-off-by: Haibo Xu <haibo1.xu@xxxxxxxxx>
> > ---
> > tools/testing/selftests/kvm/get-reg-list.c | 42 +++++++++++++++++++++-
> > 1 file changed, 41 insertions(+), 1 deletion(-)
> >
> > diff --git a/tools/testing/selftests/kvm/get-reg-list.c b/tools/testing/selftests/kvm/get-reg-list.c
> > index 3beb6b62de0a..612dabc61137 100644
> > --- a/tools/testing/selftests/kvm/get-reg-list.c
> > +++ b/tools/testing/selftests/kvm/get-reg-list.c
> > @@ -138,11 +138,50 @@ static struct kvm_vcpu *vcpu_config_get_vcpu(struct vcpu_reg_list *c, struct kvm
> > prepare_vcpu_init(c, &init);
> > vcpu = __vm_vcpu_add(vm, 0);
> > aarch64_vcpu_setup(vcpu, &init);
> > - finalize_vcpu(vcpu, c);
> >
> > return vcpu;
> > }
> > #else
> > +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;
> > +}
> > +
> > +static void finalize_vcpu(struct kvm_vcpu *vcpu, struct vcpu_reg_list *c)
> > +{
> > + struct vcpu_reg_sublist *s;
> > +
> > + /*
> > + * Disable all extensions which were enabled by default
> > + * if they were available in the risc-v host.
> > + */
> > + for (int i = 0; i < KVM_RISCV_ISA_EXT_MAX; i++) {
> > + __vcpu_set_reg(vcpu, RISCV_ISA_EXT_REG(i), 0);
> > + }
>
> nit: can drop the {}
>
> > +
> > + for_each_sublist(c, s) {
> > + if (!s->feature)
> > + continue;
> > +
> > + /* Try to enable the desired extension */
> > + __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),
> > + "%s: %s not available, skipping tests\n",
> > + config_name(c), s->name);
> > + }
> > +}
> > +
> > static struct kvm_vcpu *vcpu_config_get_vcpu(struct vcpu_reg_list *c, struct kvm_vm *vm)
> > {
> > return __vm_vcpu_add(vm, 0);
> > @@ -178,6 +217,7 @@ static void run_test(struct vcpu_reg_list *c)
> >
> > vm = vm_create_barebones();
> > vcpu = vcpu_config_get_vcpu(c, vm);
> > + finalize_vcpu(vcpu, c);
>
> Now that both arm and riscv call finalize_vcpu() we could do the weak
> function trick for it and move the arch-specific implementations to
> their own arch-specific files.
>
> >
> > reg_list = vcpu_get_reg_list(vcpu);
> >
> > --
> > 2.34.1
> >
>
> Otherwise,
>
> Reviewed-by: Andrew Jones <ajones@xxxxxxxxxxxxxxxx>
>
> Thanks,
> drew
