From: SeungJu Cheon <suunj1331@gmail.com>
To: Anup Patel <anup@brainfault.org>, Atish Patra <atish.patra@linux.dev>
Cc: Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Alexandre Ghiti <alex@ghiti.fr>,
Andrew Jones <ajones@ventanamicro.com>,
kvm@vger.kernel.org, kvm-riscv@lists.infradead.org,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
Shuah Khan <skhan@linuxfoundation.org>,
linux-kernel-mentees@lists.linux.dev, me@brighamcampbell.com,
SeungJu Cheon <suunj1331@gmail.com>
Subject: [PATCH v1 0/3] RISC-V: KVM: Fix PMU counter handling issues
Date: Tue, 25 Aug 2026 17:37:16 +0900 [thread overview]
Message-ID: <20260825083719.643970-1-suunj1331@gmail.com> (raw)
This series fixes three issues in the KVM RISC-V PMU implementation:
- preserve firmware counter values across stop/start;
- report failures when writing snapshot data to guest memory; and
- fix perf-backed counter accounting across read and stop.
The changes were tested with the existing KVM RISC-V SBI PMU selftests
and additional tests covering the affected stop/start, snapshot failure,
and repeated read paths.
SeungJu Cheon (3):
RISC-V: KVM: Preserve firmware counter value across stop/start
RISC-V: KVM: Report snapshot write failure to the guest
RISC-V: KVM: Fix perf-backed counter accounting across stop and read
arch/riscv/kvm/vcpu_pmu.c | 33 +++++++++++++++++----------------
1 file changed, 17 insertions(+), 16 deletions(-)
base-commit: 0a0d1d55dad570724bf8c7ea83409639cfb4be9b
--
2.52.0
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next reply other threads:[~2026-08-25 8:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-25 8:37 SeungJu Cheon [this message]
2026-08-25 8:37 ` [PATCH v1 1/3] RISC-V: KVM: Preserve firmware counter value across stop/start SeungJu Cheon
2026-08-25 8:37 ` [PATCH v1 2/3] RISC-V: KVM: Report snapshot write failure to the guest SeungJu Cheon
2026-08-25 8:37 ` [PATCH v1 3/3] RISC-V: KVM: Fix perf-backed counter accounting across stop and read SeungJu Cheon
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