From: Cornelia Huck <cohuck@redhat.com>
To: Marc Zyngier <maz@kernel.org>
Cc: Jing Zhang <jingzhangos@google.com>, KVM <kvm@vger.kernel.org>,
KVMARM <kvmarm@lists.linux.dev>,
ARMLinux <linux-arm-kernel@lists.infradead.org>,
Oliver Upton <oliver.upton@linux.dev>,
Will Deacon <will@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Fuad Tabba <tabba@google.com>, Reiji Watanabe <reijiw@google.com>,
Raghavendra Rao Ananta <rananta@google.com>,
Suraj Jitindar Singh <surajjs@amazon.com>
Subject: Re: [PATCH v8 02/11] KVM: arm64: Document KVM_ARM_GET_REG_WRITABLE_MASKS
Date: Mon, 21 Aug 2023 09:17:23 +0200 [thread overview]
Message-ID: <87sf8c9858.fsf@redhat.com> (raw)
In-Reply-To: <86sf8hg45k.wl-maz@kernel.org>
On Thu, Aug 17 2023, Marc Zyngier <maz@kernel.org> wrote:
> On Thu, 17 Aug 2023 09:16:56 +0100,
> Cornelia Huck <cohuck@redhat.com> wrote:
>>
>> On Mon, Aug 14 2023, Jing Zhang <jingzhangos@google.com> wrote:
>>
>> > Maybe it'd be better to leave this to whenever we do need to add other
>> > range support?
>>
>> My point is: How does userspace figure out if the kernel that is running
>> supports ranges other than id regs? If this is just an insurance against
>> changes that might arrive or not, we can live with the awkward "just try
>> it out" approach; if we think it's likely that we'll need to extend it,
>> we need to add the mechanism for userspace to find out about it now, or
>> it would need to probe for presence of the mechanism...
>
> Agreed. Nothing like the present to address this sort of things. it
> really doesn't cost much, and I'd rather have it right now.
>
> Here's a vague attempt at an advertising mechanism. If people are OK
> with it, I can stash that on top of Jing's series.
I think that looks reasonable.
next prev parent reply other threads:[~2023-08-21 7:18 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-07 16:21 [PATCH v8 00/11] Enable writable for idregs DFR0,PFR0, MMFR{0,1,2,3} Jing Zhang
2023-08-07 16:21 ` [PATCH v8 01/11] KVM: arm64: Allow userspace to get the writable masks for feature ID registers Jing Zhang
2023-08-07 16:22 ` [PATCH v8 02/11] KVM: arm64: Document KVM_ARM_GET_REG_WRITABLE_MASKS Jing Zhang
2023-08-14 9:46 ` Cornelia Huck
2023-08-14 17:25 ` Jing Zhang
2023-08-17 8:16 ` Cornelia Huck
2023-08-17 14:00 ` Marc Zyngier
2023-08-21 7:17 ` Cornelia Huck [this message]
2023-08-21 17:24 ` Jing Zhang
2023-08-21 17:30 ` Marc Zyngier
2023-08-07 16:22 ` [PATCH v8 03/11] KVM: arm64: Use guest ID register values for the sake of emulation Jing Zhang
2023-08-07 16:22 ` [PATCH v8 04/11] KVM: arm64: Reject attempts to set invalid debug arch version Jing Zhang
2023-08-07 16:22 ` [PATCH v8 05/11] KVM: arm64: Enable writable for ID_AA64DFR0_EL1 and ID_DFR0_EL1 Jing Zhang
2023-08-17 15:43 ` Marc Zyngier
2023-08-21 17:37 ` Jing Zhang
2023-08-07 16:22 ` [PATCH v8 06/11] KVM: arm64: Bump up the default KVM sanitised debug version to v8p8 Jing Zhang
2023-08-07 16:22 ` [PATCH v8 07/11] KVM: arm64: Enable writable for ID_AA64PFR0_EL1 Jing Zhang
2023-08-17 15:53 ` Marc Zyngier
2023-08-21 17:40 ` Jing Zhang
2023-08-07 16:22 ` [PATCH v8 08/11] KVM: arm64: Refactor helper Macros for idreg desc Jing Zhang
2023-08-07 16:22 ` [PATCH v8 09/11] KVM: arm64: Enable writable for ID_AA64MMFR{0, 1, 2, 3}_EL1 Jing Zhang
2023-08-07 16:22 ` [PATCH v8 10/11] KVM: arm64: selftests: Import automatic system register definition generation from kernel Jing Zhang
2023-08-16 6:54 ` Shaoqin Huang
2023-08-16 17:15 ` Jing Zhang
2023-08-07 16:22 ` [PATCH v8 11/11] KVM: arm64: selftests: Test for setting ID register from usersapce Jing Zhang
2023-08-16 6:58 ` Shaoqin Huang
2023-08-16 17:23 ` Jing Zhang
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