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From: Raghavendra Rao Ananta <rananta@google.com>
To: Marc Zyngier <maz@kernel.org>
Cc: Andrew Jones <drjones@redhat.com>,
	James Morse <james.morse@arm.com>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Peter Shier <pshier@google.com>,
	Ricardo Koller <ricarkol@google.com>,
	Oliver Upton <oupton@google.com>,
	Reiji Watanabe <reijiw@google.com>,
	Jing Zhang <jingzhangos@google.com>,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org
Subject: Re: [RFC PATCH v2 02/11] KVM: Introduce kvm_vcpu_has_run_once
Date: Tue, 23 Nov 2021 10:31:53 -0800	[thread overview]
Message-ID: <CAJHc60ysebqSukBLpZ9na7daoFr+sGB0PWw-_V5nFObjqdkSyg@mail.gmail.com> (raw)
In-Reply-To: <87zgpwcg0s.wl-maz@kernel.org>

Hello Marc,

On Mon, Nov 22, 2021 at 8:27 AM Marc Zyngier <maz@kernel.org> wrote:
>
> On Sat, 13 Nov 2021 01:22:25 +0000,
> Raghavendra Rao Ananta <rananta@google.com> wrote:
> >
> > Architectures such as arm64 and riscv uses vcpu variables
> > such as has_run_once and ran_atleast_once, respectively,
> > to mark if the vCPU has started running. Since these are
> > architecture agnostic variables, introduce
> > kvm_vcpu_has_run_once() as a core kvm functionality and
> > use this instead of the architecture defined variables.
> >
> > No functional change intended.
> >
> > Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
>
> arm64 is moving away from this, see [1]. You also don't need any new
> state, as vcpu->pid gives you exactly what you need.

Thanks for the pointer. I can directly use this!
>
> Happy to queue additional patches on top if you want to deal with
> riscv.
>
Just to clarify, you mean get the kvm support for riscv on kvmarm-next?
If yes, then sure, I can make changes in riscv to use
vcpu_has_run_once() from your series.

Regards,
Raghavendra


> Thanks,
>
>         M.
>
> [1] https://lore.kernel.org/all/20211018211158.3050779-1-maz@kernel.org/
>
> --
> Without deviation from the norm, progress is not possible.

  reply	other threads:[~2021-11-23 18:32 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-13  1:22 [RFC PATCH v2 00/11] KVM: arm64: Add support for hypercall services selection Raghavendra Rao Ananta
2021-11-13  1:22 ` [RFC PATCH v2 01/11] KVM: arm64: Factor out firmware register handling from psci.c Raghavendra Rao Ananta
2021-11-27 13:16   ` Andrew Jones
2021-11-30  0:57     ` Raghavendra Rao Ananta
2021-11-13  1:22 ` [RFC PATCH v2 02/11] KVM: Introduce kvm_vcpu_has_run_once Raghavendra Rao Ananta
2021-11-22 16:27   ` Marc Zyngier
2021-11-23 18:31     ` Raghavendra Rao Ananta [this message]
2021-11-13  1:22 ` [RFC PATCH v2 03/11] KVM: Introduce kvm_vm_has_run_once Raghavendra Rao Ananta
2021-11-22 16:31   ` Marc Zyngier
2021-11-23 18:48     ` Raghavendra Rao Ananta
2021-11-13  1:22 ` [RFC PATCH v2 04/11] KVM: arm64: Setup a framework for hypercall bitmap firmware registers Raghavendra Rao Ananta
2021-11-22 17:23   ` Marc Zyngier
2021-11-23 18:34     ` Raghavendra Rao Ananta
2021-11-27 17:27       ` Andrew Jones
2021-11-30  0:56         ` Raghavendra Rao Ananta
2021-11-30 10:19           ` Andrew Jones
2021-11-13  1:22 ` [RFC PATCH v2 05/11] KVM: arm64: Add standard hypervisor firmware register Raghavendra Rao Ananta
2021-11-13  1:22 ` [RFC PATCH v2 06/11] KVM: arm64: Add vendor " Raghavendra Rao Ananta
2021-11-13  1:22 ` [RFC PATCH v2 07/11] Docs: KVM: Add doc for the bitmap firmware registers Raghavendra Rao Ananta
2021-11-13  1:22 ` [RFC PATCH v2 08/11] Docs: KVM: Rename psci.rst to hypercalls.rst Raghavendra Rao Ananta
2021-11-13  1:22 ` [RFC PATCH v2 09/11] tools: Import ARM SMCCC definitions Raghavendra Rao Ananta
2021-11-13  1:22 ` [RFC PATCH v2 10/11] selftests: KVM: aarch64: Introduce hypercall ABI test Raghavendra Rao Ananta
2021-11-13  1:22 ` [RFC PATCH v2 11/11] selftests: KVM: aarch64: Add the bitmap firmware registers to get-reg-list Raghavendra Rao Ananta

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