From: Marc Zyngier <maz@kernel.org>
To: Quentin Perret <qperret@google.com>
Cc: kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
dave.martin@arm.com, daniel.kiss@arm.com,
Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
broonie@kernel.org, kernel-team@android.com
Subject: Re: [PATCH 08/10] KVM: arm64: Add a nVHE-specific SVE VQ reset hypercall
Date: Tue, 16 Mar 2021 12:18:15 +0000 [thread overview]
Message-ID: <87a6r3fg1k.wl-maz@kernel.org> (raw)
In-Reply-To: <YFCMY2TDl4/6++PJ@google.com>
On Tue, 16 Mar 2021 10:45:55 +0000,
Quentin Perret <qperret@google.com> wrote:
>
> On Tuesday 16 Mar 2021 at 10:13:10 (+0000), Marc Zyngier wrote:
> > diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> > index c4afe3d3397f..9108ccc80653 100644
> > --- a/arch/arm64/include/asm/kvm_host.h
> > +++ b/arch/arm64/include/asm/kvm_host.h
> > @@ -593,7 +593,9 @@ int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
> > void kvm_arm_halt_guest(struct kvm *kvm);
> > void kvm_arm_resume_guest(struct kvm *kvm);
> >
> > -#define kvm_call_hyp_nvhe(f, ...) \
> > +static inline void __kvm_reset_sve_vq(void) {}
>
> Why is this one needed? With an explicit call to kvm_call_hyp_nvhe() you
> shouldn't need to provide a VHE implementation I think.
Did I mention that I positively hate kvm_call_hyp_nvhe()? ;-)
But yes, you are right, this can be further simplified.
Thanks,
M.
--
Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2021-03-16 12:19 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-16 10:13 [PATCH 00/10] KVM: arm64: Enable SVE support on nVHE systems Marc Zyngier
2021-03-16 10:13 ` [PATCH 01/10] KVM: arm64: Provide KVM's own save/restore SVE primitives Marc Zyngier
2021-03-16 10:31 ` Quentin Perret
2021-03-16 12:17 ` Marc Zyngier
2021-03-17 14:30 ` Will Deacon
2021-03-16 10:13 ` [PATCH 02/10] KVM: arm64: Use {read,write}_sysreg_el1 to access ZCR_EL1 Marc Zyngier
2021-03-17 14:31 ` Will Deacon
2021-03-16 10:13 ` [PATCH 03/10] KVM: arm64: Let vcpu_sve_pffr() handle HYP VAs Marc Zyngier
2021-03-17 14:31 ` Will Deacon
2021-03-16 10:13 ` [PATCH 04/10] KVM: arm64: Introduce vcpu_sve_vq() helper Marc Zyngier
2021-03-17 14:01 ` Will Deacon
2021-03-16 10:13 ` [PATCH 05/10] KVM: arm64: Rework SVE host-save/guest-restore Marc Zyngier
2021-03-17 14:29 ` Will Deacon
2021-03-17 14:54 ` Marc Zyngier
2021-03-16 10:13 ` [PATCH 06/10] KVM: arm64: Map SVE context at EL2 when available Marc Zyngier
2021-03-17 16:01 ` Will Deacon
2021-03-18 8:56 ` Marc Zyngier
2021-03-16 10:13 ` [PATCH 07/10] KVM: arm64: Save guest's ZCR_EL1 before saving the FPSIMD state Marc Zyngier
2021-03-17 17:17 ` Will Deacon
2021-03-17 17:20 ` Will Deacon
2021-03-16 10:13 ` [PATCH 08/10] KVM: arm64: Add a nVHE-specific SVE VQ reset hypercall Marc Zyngier
2021-03-16 10:45 ` Quentin Perret
2021-03-16 12:18 ` Marc Zyngier [this message]
2021-03-16 14:24 ` Andrew Scull
2021-03-16 15:00 ` Marc Zyngier
2021-03-16 10:13 ` [PATCH 09/10] KVM: arm64: Save/restore SVE state for nVHE Marc Zyngier
2021-03-17 17:57 ` Will Deacon
2021-03-18 9:12 ` Marc Zyngier
2021-03-16 10:13 ` [PATCH 10/10] KVM: arm64: Enable SVE support " Marc Zyngier
2021-03-17 18:00 ` Will Deacon
2021-03-18 9:14 ` Marc Zyngier
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