linux-kernel - Re: [PATCH v6 23/24] KVM: riscv: selftests: Add a test for counter overflow

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Message-ID: <20240415-418eb2e18cfeb613d252fff0@orel>
Date: Mon, 15 Apr 2024 15:36:02 +0200
From: Andrew Jones <ajones@...tanamicro.com>
To: Atish Patra <atishp@...osinc.com>
Cc: linux-kernel@...r.kernel.org, Anup Patel <anup@...infault.org>, 
	Ajay Kaher <ajay.kaher@...adcom.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Alexandre Ghiti <alexghiti@...osinc.com>, Alexey Makhalov <alexey.amakhalov@...adcom.com>, 
	Atish Patra <atishp@...shpatra.org>, 
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.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 v6 23/24] KVM: riscv: selftests: Add a test for counter
 overflow

On Wed, Apr 10, 2024 at 05:07:51PM -0700, Atish Patra wrote:
> Add a test for verifying overflow interrupt. Currently, it relies on
> overflow support on cycle/instret events. This test works for cycle/
> instret events which support sampling via hpmcounters on the platform.
> There are no ISA extensions to detect if a platform supports that. Thus,
> this test will fail on platform with virtualization but doesn't
> support overflow on these two events.
> 
> Reviewed-by: Anup Patel <anup@...infault.org>
> Signed-off-by: Atish Patra <atishp@...osinc.com>
> ---
>  .../selftests/kvm/riscv/sbi_pmu_test.c        | 113 ++++++++++++++++++
>  1 file changed, 113 insertions(+)
>

Reviewed-by: Andrew Jones <ajones@...tanamicro.com>