From: Marc Zyngier <marc.zyngier@arm.com>
To: Christoffer Dall <cdall@linaro.org>
Cc: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
Christoffer Dall <christoffer.dall@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
Jason Cooper <jason@lakedaemon.net>,
Eric Auger <eric.auger@redhat.com>,
Shanker Donthineni <shankerd@codeaurora.org>,
Mark Rutland <mark.rutland@arm.com>,
Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
Subject: Re: [PATCH v3 39/59] KVM: arm/arm64: GICv4: Add property field and per-VM predicate
Date: Wed, 30 Aug 2017 10:46:05 +0100 [thread overview]
Message-ID: <45590bb0-0d0e-668f-5553-0443ef8de9a5@arm.com> (raw)
In-Reply-To: <20170826194915.GE11074@cbox>
On 26/08/17 20:49, Christoffer Dall wrote:
> On Mon, Jul 31, 2017 at 06:26:17PM +0100, Marc Zyngier wrote:
>> Add a new has_gicv4 field in the global VGIC state that indicates
>> whether the HW is GICv4 capable, as a per-VM predicate indicating
>> if there is a possibility for a VM to support direct injection
>> (the above being true and the VM having an ITS).
>>
>> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
>> ---
>> include/kvm/arm_vgic.h | 3 +++
>> virt/kvm/arm/vgic/vgic-mmio-v3.c | 5 +++++
>> virt/kvm/arm/vgic/vgic.h | 2 ++
>> 3 files changed, 10 insertions(+)
>>
>> diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
>> index ee8587c8c715..84694b42373a 100644
>> --- a/include/kvm/arm_vgic.h
>> +++ b/include/kvm/arm_vgic.h
>> @@ -73,6 +73,9 @@ struct vgic_global {
>> /* Only needed for the legacy KVM_CREATE_IRQCHIP */
>> bool can_emulate_gicv2;
>>
>> + /* Does have GICv4? */
>
> nit: questionable comment, how about
>
> /* Hardware has GICv4? */
> or
> /* Do we have GICv4? */
Yup, reads much better.
>> + bool has_gicv4;
>> +
>> /* GIC system register CPU interface */
>> struct static_key_false gicv3_cpuif;
>>
>> diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
>> index 714fa3933546..74109ca75cc0 100644
>> --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
>> +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
>> @@ -54,6 +54,11 @@ bool vgic_has_its(struct kvm *kvm)
>> return dist->has_its;
>> }
>>
>> +bool vgic_is_v4_capable(struct kvm *kvm)
>> +{
>> + return kvm_vgic_global_state.has_gicv4 && vgic_has_its(kvm);
>> +}
>> +
>
> uber nit: the naming here is a bit funny, because we won't be presenting
> a GICv4 GIC to the guest, so I'd prefer something like
> vgic_supports_direct_msis() or something like that, but this is
> obviously not a deal breaker.
I like it. It has the advantage of not tying the predicate to a
particular direct injection method, should we one day have a GICv6 (no,
please...).
Thanks,
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2017-08-30 9:46 UTC|newest]
Thread overview: 118+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-31 17:25 [PATCH v3 00/59] irqchip: KVM: Add support for GICv4 Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 01/59] genirq: Let irq_set_vcpu_affinity() iterate over hierarchy Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 02/59] irqchip/gic-v3: Add redistributor iterator Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 03/59] irqchip/gic-v3: Add VLPI/DirectLPI discovery Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 04/59] irqchip/gic-v3-its: Move LPI definitions around Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 05/59] irqchip/gic-v3-its: Add probing for VLPI properties Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 06/59] irqchip/gic-v3-its: Macro-ize its_send_single_command Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 07/59] irqchip/gic-v3-its: Implement irq_set_irqchip_state for pending state Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 08/59] irqchip/gic-v3-its: Split out property table allocation Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 09/59] irqchip/gic-v3-its: Allow use of indirect VCPU tables Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 10/59] irqchip/gic-v3-its: Split out pending table allocation Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 11/59] irqchip/gic-v3-its: Rework LPI freeing Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 12/59] irqchip/gic-v3-its: Generalize device table allocation Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 13/59] irqchip/gic-v3-its: Generalize LPI configuration Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 14/59] irqchip/gic-v4: Add management structure definitions Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 15/59] irqchip/gic-v3-its: Add GICv4 ITS command definitions Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 16/59] irqchip/gic-v3-its: Add VLPI configuration hook Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 17/59] irqchip/gic-v3-its: Add VLPI map/unmap operations Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 18/59] irqchip/gic-v3-its: Add VLPI configuration handling Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 19/59] irqchip/gic-v3-its: Add VPE domain infrastructure Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 20/59] irqchip/gic-v3-its: Add VPE irq domain allocation/teardown Marc Zyngier
2017-07-31 17:25 ` [PATCH v3 21/59] irqchip/gic-v3-its: Add VPE irq domain [de]activation Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 22/59] irqchip/gic-v3-its: Add VPENDBASER/VPROPBASER accessors Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 23/59] irqchip/gic-v3-its: Add VPE scheduling Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 24/59] irqchip/gic-v3-its: Add VPE invalidation hook Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 25/59] irqchip/gic-v3-its: Add VPE affinity changes Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 26/59] irqchip/gic-v3-its: Add VPE interrupt masking Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 27/59] irqchip/gic-v3-its: Support VPE doorbell invalidation even when !DirectLPI Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 28/59] irqchip/gic-v3-its: Allow doorbell interrupts to be injected/cleared Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 29/59] irqchip/gic-v3-its: Set implementation defined bit to enable VLPIs Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 30/59] irqchip/gic-v4: Add per-VM VPE domain creation Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 31/59] irqchip/gic-v4: Add VPE command interface Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 32/59] irqchip/gic-v4: Add VLPI configuration interface Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 33/59] irqchip/gic-v4: Add some basic documentation Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 34/59] irqchip/gic-v4: Enable low-level GICv4 operations Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 35/59] irqchip/gic-v3: Advertise GICv4 support to KVM Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 36/59] KVM: arm: Select ARM_GIC_V3 and ARM_GIC_V3_ITS Marc Zyngier
2017-08-26 19:49 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 37/59] KVM: arm/arm64: vgic: Move kvm_vgic_destroy call around Marc Zyngier
2017-08-26 19:49 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 38/59] KVM: arm/arm64: vITS: Add MSI translation helpers Marc Zyngier
2017-08-26 19:49 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 39/59] KVM: arm/arm64: GICv4: Add property field and per-VM predicate Marc Zyngier
2017-08-26 19:49 ` Christoffer Dall
2017-08-30 9:46 ` Marc Zyngier [this message]
2017-07-31 17:26 ` [PATCH v3 40/59] KVM: arm/arm64: GICv4: Add init/teardown of the per-VM vPE irq domain Marc Zyngier
2017-08-26 19:49 ` Christoffer Dall
2017-08-30 9:50 ` Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 41/59] KVM: arm/arm64: GICv4: Wire mapping/unmapping of VLPIs in VFIO irq bypass Marc Zyngier
2017-08-26 19:48 ` Christoffer Dall
2017-08-30 9:42 ` Marc Zyngier
2017-08-30 10:20 ` Auger Eric
2017-08-30 10:42 ` Marc Zyngier
2017-08-30 12:54 ` Auger Eric
2017-08-30 10:28 ` Marc Zyngier
2017-08-30 11:46 ` Christoffer Dall
2017-08-30 12:53 ` Marc Zyngier
2017-08-30 19:59 ` Christoffer Dall
2017-08-31 10:24 ` Marc Zyngier
2017-08-31 12:36 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 42/59] KVM: arm/arm64: GICv4: Handle INT command applied to a VLPI Marc Zyngier
2017-08-28 18:18 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 43/59] KVM: arm/arm64: GICv4: Unmap VLPI when freeing an LPI Marc Zyngier
2017-08-28 18:18 ` Christoffer Dall
2017-08-30 11:03 ` Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 44/59] KVM: arm/arm64: GICv4: Handle MOVI applied to a VLPI Marc Zyngier
2017-08-28 18:18 ` Christoffer Dall
2017-08-30 14:08 ` Marc Zyngier
2017-08-30 20:04 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 45/59] KVM: arm/arm64: GICv4: Handle CLEAR " Marc Zyngier
2017-08-28 18:18 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 46/59] KVM: arm/arm64: GICv4: Handle MOVALL applied to a vPE Marc Zyngier
2017-08-28 18:18 ` Christoffer Dall
2017-08-30 14:46 ` Marc Zyngier
2017-08-30 20:10 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 47/59] KVM: arm/arm64: GICv4: Propagate property updates to VLPIs Marc Zyngier
2017-08-28 18:18 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 48/59] KVM: arm/arm64: GICv4: Handle INVALL applied to a vPE Marc Zyngier
2017-08-28 18:18 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 49/59] KVM: arm/arm64: GICv4: Propagate VLPI properties at map time Marc Zyngier
2017-08-28 18:18 ` Christoffer Dall
2017-08-30 14:56 ` Marc Zyngier
2017-08-30 20:12 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 50/59] KVM: arm/arm64: GICv4: Use pending_last as a scheduling hint Marc Zyngier
2017-08-28 18:18 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 51/59] KVM: arm/arm64: GICv4: Add doorbell interrupt handling Marc Zyngier
2017-08-04 7:44 ` Marc Zyngier
2017-08-28 18:18 ` Christoffer Dall
2017-08-30 10:31 ` Andrew Jones
2017-08-30 11:55 ` Christoffer Dall
2017-08-30 12:28 ` Andrew Jones
2017-08-31 12:18 ` Marc Zyngier
2017-08-31 12:41 ` Christoffer Dall
2017-08-28 18:18 ` Christoffer Dall
2017-08-30 15:36 ` Marc Zyngier
2017-08-30 20:58 ` Christoffer Dall
2017-08-31 8:19 ` Marc Zyngier
2017-09-06 9:06 ` Shannon Zhao
2017-07-31 17:26 ` [PATCH v3 52/59] KVM: arm/arm64: GICv4: Use the doorbell interrupt as an unblocking source Marc Zyngier
2017-08-28 18:19 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 53/59] KVM: arm/arm64: GICv4: Hook vPE scheduling into vgic flush/sync Marc Zyngier
2017-08-28 18:17 ` Christoffer Dall
2017-08-30 9:59 ` Marc Zyngier
2017-08-30 11:56 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 54/59] KVM: arm/arm64: GICv4: Enable virtual cpuif if VLPIs can be delivered Marc Zyngier
2017-08-28 18:20 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 55/59] KVM: arm/arm64: GICv4: Enable VLPI support Marc Zyngier
2017-08-28 18:25 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 56/59] KVM: arm/arm64: GICv4: Prevent heterogenous systems from using GICv4 Marc Zyngier
2017-08-28 18:35 ` Christoffer Dall
2017-08-30 16:03 ` Marc Zyngier
2017-08-30 21:00 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 57/59] KVM: arm/arm64: GICv4: Theory of operations Marc Zyngier
2017-08-28 18:18 ` Christoffer Dall
2017-08-30 11:30 ` Marc Zyngier
2017-08-30 11:58 ` Christoffer Dall
2017-07-31 17:26 ` [PATCH v3 58/59] irqchip/gic-v3-its: Pass its_node pointer to each command bulder Marc Zyngier
2017-07-31 17:26 ` [PATCH v3 59/59] irqchip/gic-v3-its: Workaround Huawei D05 redistributor addressing Marc Zyngier
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