From: Oliver Upton <oliver.upton@linux.dev>
To: Jinqian Yang <yangjinqian1@huawei.com>
Cc: yuzenghui@huawei.com, maz@kernel.org,
linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
linux-kernel@vger.kernel.org, liuyonglong@huawei.com,
wangzhou1@hisilicon.com
Subject: Re: [PATCH v2 0/3] KVM: arm64: make EL2 feature fields writable in ID_AA64MMFR1_EL1
Date: Tue, 9 Sep 2025 00:00:29 -0700 [thread overview]
Message-ID: <aL_QjZbkvHsYIRt6@linux.dev> (raw)
In-Reply-To: <20250909034415.3822478-1-yangjinqian1@huawei.com>
On Tue, Sep 09, 2025 at 11:44:12AM +0800, Jinqian Yang wrote:
> Allow userspace to downgrade EL2 features (VH, TWED, HCX) to ensure VM live
> migration compatibility between hosts with varying feature support.
>
> v1: https://lore.kernel.org/linux-arm-kernel/20250325121126.1380681-1-yangjinqian1@huawei.com/
>
> Change Log:
> v1->v2:
> -Added support for downgrading TWED and VH fields.
> -Added corresponding test cases to the set_id_regs selftest.
>
> Jinqian Yang (3):
> KVM: arm64: Make ID_AA64MMFR1_EL1.HCX writable from userspace
> KVM: arm64: Make ID_AA64MMFR1_EL1.TWED writable from userspace
> KVM: arm64: Make ID_AA64MMFR1_EL1.VH writable from userspace
>
> arch/arm64/kvm/sys_regs.c | 3 ---
> tools/testing/selftests/kvm/arm64/set_id_regs.c | 3 +++
General comment: please make do kernel and selftest changes in separate
patches.
Thanks,
Oliver
next prev parent reply other threads:[~2025-09-09 7:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-09 3:44 [PATCH v2 0/3] KVM: arm64: make EL2 feature fields writable in ID_AA64MMFR1_EL1 Jinqian Yang
2025-09-09 3:44 ` [PATCH v2 1/3] KVM: arm64: Make ID_AA64MMFR1_EL1.HCX writable from userspace Jinqian Yang
2025-09-09 7:07 ` Oliver Upton
2025-09-09 10:10 ` Marc Zyngier
2025-09-09 21:38 ` Oliver Upton
2025-09-10 1:57 ` Jinqian Yang
2025-09-09 3:44 ` [PATCH v2 2/3] KVM: arm64: Make ID_AA64MMFR1_EL1.TWED " Jinqian Yang
2025-09-09 3:44 ` [PATCH v2 3/3] KVM: arm64: Make ID_AA64MMFR1_EL1.VH " Jinqian Yang
2025-09-09 5:32 ` Oliver Upton
2025-09-10 1:42 ` Jinqian Yang
2025-09-09 7:00 ` Oliver Upton [this message]
2025-09-10 1:42 ` [PATCH v2 0/3] KVM: arm64: make EL2 feature fields writable in ID_AA64MMFR1_EL1 Jinqian Yang
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