From: Steffen Eiden <seiden@linux.ibm.com>
To: Fuad Tabba <fuad.tabba@linux.dev>
Cc: Marc Zyngier <maz@kernel.org>, Oliver Upton <oupton@kernel.org>,
kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Vincent Donnefort <vdonnefort@google.com>,
Quentin Perret <qperret@google.com>,
Sebastian Ene <sebastianene@google.com>,
Hyunwoo Kim <imv4bel@gmail.com>, Fuad Tabba <tabba@google.com>
Subject: Re: [PATCH v6 3/8] KVM: arm64: Factor out reusable vCPU reset helpers
Date: Fri, 17 Jul 2026 14:43:59 +0200 [thread overview]
Message-ID: <20260717124359.319936-B-seiden@linux.ibm.com> (raw)
In-Reply-To: <20260715081238.1891918-4-fuad.tabba@linux.dev>
On Wed, Jul 15, 2026 at 09:12:33AM +0100, Fuad Tabba wrote:
> Pull the reusable pieces out of kvm_reset_vcpu(): expose the reset
> PSTATE values in kvm_arm.h, and split the core register reset and the
> PSCI-driven reset into kvm_reset_vcpu_core() and kvm_reset_vcpu_psci().
> A follow-up series reuses these to reset protected vCPUs at EL2.
>
> No functional change intended.
>
> Reviewed-by: Vincent Donnefort <vdonnefort@google.com>
> Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
That looks good. There is another usecase for this. I did a very similar
thing in [1] to reuse the reset functionality for arm64 on s390. I just
did not the move the code to a different file.
FWIW:
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
[1] https://lore.kernel.org/all/20260706085229.979525-11-seiden@linux.ibm.com/
Steffen
next prev parent reply other threads:[~2026-07-17 12:44 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-15 8:12 [PATCH v6 0/8] KVM: arm64: pKVM vCPU state management at EL2 Fuad Tabba
2026-07-15 8:12 ` [PATCH v6 1/8] KVM: arm64: Extract MPIDR computation into a shared header Fuad Tabba
2026-07-15 8:12 ` [PATCH v6 2/8] KVM: arm64: Make vcpu_{read,write}_sys_reg available to HYP code Fuad Tabba
2026-07-15 8:12 ` [PATCH v6 3/8] KVM: arm64: Factor out reusable vCPU reset helpers Fuad Tabba
2026-07-17 12:43 ` Steffen Eiden [this message]
2026-07-15 8:12 ` [PATCH v6 4/8] KVM: arm64: Move PSCI helper functions to a shared header Fuad Tabba
2026-07-15 8:12 ` [PATCH v6 5/8] KVM: arm64: Add host and hypervisor vCPU lookup primitives Fuad Tabba
2026-07-15 8:12 ` [PATCH v6 6/8] KVM: arm64: Minimise EL2's exposure of host VGIC state during world switch Fuad Tabba
2026-07-15 8:12 ` [PATCH v6 7/8] KVM: arm64: Add primitives to flush/sync the VGIC state at EL2 Fuad Tabba
2026-07-15 8:12 ` [PATCH v6 8/8] KVM: arm64: Implement lazy vCPU state sync for non-protected guests Fuad Tabba
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