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

From: Muhammad Usama Anjum <usama.anjum@collabora.com>
To: Atish Patra <atishp@rivosinc.com>, linux-kernel@vger.kernel.org
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>,
	Andrew Jones <ajones@ventanamicro.com>,
	Ajay Kaher <ajay.kaher@broadcom.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Alexandre Ghiti <alexghiti@rivosinc.com>,
	Anup Patel <anup@brainfault.org>,
	samuel.holland@sifive.com,
	Conor Dooley <conor.dooley@microchip.com>,
	Juergen Gross <jgross@suse.com>,
	kvm-riscv@lists.infradead.org, kvm@vger.kernel.org,
	linux-kselftest@vger.kernel.org, linux-riscv@lists.infradead.org,
	Mark Rutland <mark.rutland@arm.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Shuah Khan <shuah@kernel.org>,
	virtualization@lists.linux.dev, Will Deacon <will@kernel.org>,
	x86@kernel.org
Subject: Re: [PATCH v8 18/24] KVM: riscv: selftests: Add helper functions for extension checks
Date: Tue, 23 Apr 2024 13:57:50 +0500	[thread overview]
Message-ID: <bc284bf8-c74d-4601-ab64-79b5cc12f829@collabora.com> (raw)
In-Reply-To: <20240420151741.962500-19-atishp@rivosinc.com>

On 4/20/24 8:17 PM, Atish Patra 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@ventanamicro.com>
> Signed-off-by: Atish Patra <atishp@rivosinc.com>
LGTM

Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  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);

-- 
BR,
Muhammad Usama Anjum

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