| Message ID | fa6b80b578553e561ccacaeb24091e0716975593.1687515463.git.haibo1.xu@intel.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | RISCV: Add KVM_GET_REG_LIST API | expand |
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@ventanamicro.com> > Signed-off-by: Haibo Xu <haibo1.xu@intel.com> > --- > 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@ventanamicro.com> Thanks, drew
Thanks a lot! On Tue, Jun 27, 2023 at 5:16 PM Andrew Jones <ajones@ventanamicro.com> 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@ventanamicro.com> > > Signed-off-by: Haibo Xu <haibo1.xu@intel.com> > > --- > > 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@ventanamicro.com> > > Thanks, > drew
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); + } + + 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); reg_list = vcpu_get_reg_list(vcpu);
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@ventanamicro.com> Signed-off-by: Haibo Xu <haibo1.xu@intel.com> --- tools/testing/selftests/kvm/get-reg-list.c | 42 +++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-)