linux-kernel - Re: [PATCH v8 18/24] KVM: riscv: selftests: Add helper functions for extension checks

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Message-ID: <CAAhSdy0OmAjs1oHUjPzwUydsnGtqUd_HKTZKZzJpQQFEXvPX8w@mail.gmail.com>
Date: Mon, 22 Apr 2024 10:59:25 +0530
From: Anup Patel <anup@...infault.org>
To: Atish Patra <atishp@...osinc.com>
Cc: linux-kernel@...r.kernel.org, Andrew Jones <ajones@...tanamicro.com>, 
	Ajay Kaher <ajay.kaher@...adcom.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Alexandre Ghiti <alexghiti@...osinc.com>, samuel.holland@...ive.com, 
	Conor Dooley <conor.dooley@...rochip.com>, Juergen Gross <jgross@...e.com>, 
	kvm-riscv@...ts.infradead.org, kvm@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, linux-riscv@...ts.infradead.org, 
	Mark Rutland <mark.rutland@....com>, Palmer Dabbelt <palmer@...belt.com>, 
	Paolo Bonzini <pbonzini@...hat.com>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Shuah Khan <shuah@...nel.org>, virtualization@...ts.linux.dev, 
	Will Deacon <will@...nel.org>, x86@...nel.org
Subject: Re: [PATCH v8 18/24] KVM: riscv: selftests: Add helper functions for
 extension checks

On Sat, Apr 20, 2024 at 5:18 AM Atish Patra <atishp@...osinc.com> wrote:
>
> __vcpu_has_ext can check both SBI and ISA extensions when the first
> argument is properly converted to SBI/ISA extension IDs. Introduce
> two helper functions to make life easier for developers so they
> don't have to worry about the conversions.
>
> Replace the current usages as well with new helpers.
>
> Reviewed-by: Andrew Jones <ajones@...tanamicro.com>
> Signed-off-by: Atish Patra <atishp@...osinc.com>

LGTM.

Reviewed-by: Anup Patel <anup@...infault.org>

Regards,
Anup

> ---
>  tools/testing/selftests/kvm/include/riscv/processor.h | 10 ++++++++++
>  tools/testing/selftests/kvm/riscv/arch_timer.c        |  2 +-
>  2 files changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/kvm/include/riscv/processor.h b/tools/testing/selftests/kvm/include/riscv/processor.h
> index 3b9cb39327ff..5f389166338c 100644
> --- a/tools/testing/selftests/kvm/include/riscv/processor.h
> +++ b/tools/testing/selftests/kvm/include/riscv/processor.h
> @@ -50,6 +50,16 @@ static inline uint64_t __kvm_reg_id(uint64_t type, uint64_t subtype,
>
>  bool __vcpu_has_ext(struct kvm_vcpu *vcpu, uint64_t ext);
>
> +static inline bool __vcpu_has_isa_ext(struct kvm_vcpu *vcpu, uint64_t isa_ext)
> +{
> +       return __vcpu_has_ext(vcpu, RISCV_ISA_EXT_REG(isa_ext));
> +}
> +
> +static inline bool __vcpu_has_sbi_ext(struct kvm_vcpu *vcpu, uint64_t sbi_ext)
> +{
> +       return __vcpu_has_ext(vcpu, RISCV_SBI_EXT_REG(sbi_ext));
> +}
> +
>  struct ex_regs {
>         unsigned long ra;
>         unsigned long sp;
> diff --git a/tools/testing/selftests/kvm/riscv/arch_timer.c b/tools/testing/selftests/kvm/riscv/arch_timer.c
> index 0f9cabd99fd4..735b78569021 100644
> --- a/tools/testing/selftests/kvm/riscv/arch_timer.c
> +++ b/tools/testing/selftests/kvm/riscv/arch_timer.c
> @@ -85,7 +85,7 @@ struct kvm_vm *test_vm_create(void)
>         int nr_vcpus = test_args.nr_vcpus;
>
>         vm = vm_create_with_vcpus(nr_vcpus, guest_code, vcpus);
> -       __TEST_REQUIRE(__vcpu_has_ext(vcpus[0], RISCV_ISA_EXT_REG(KVM_RISCV_ISA_EXT_SSTC)),
> +       __TEST_REQUIRE(__vcpu_has_isa_ext(vcpus[0], KVM_RISCV_ISA_EXT_SSTC),
>                                    "SSTC not available, skipping test\n");
>
>         vm_init_vector_tables(vm);
> --
> 2.34.1
>