From: Zenghui Yu <yuzenghui@huawei.com>
To: Marc Zyngier <maz@kernel.org>, <kvmarm@lists.cs.columbia.edu>,
<linux-kernel@vger.kernel.org>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Jason Cooper <jason@lakedaemon.net>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 20/35] irqchip/gic-v4.1: Allow direct invalidation of VLPIs
Date: Sat, 28 Sep 2019 10:02:07 +0800 [thread overview]
Message-ID: <db01f956-bc53-b8a5-9406-15b889d717f0@huawei.com> (raw)
In-Reply-To: <20190923182606.32100-21-maz@kernel.org>
On 2019/9/24 2:25, Marc Zyngier wrote:
> Just like for INVALL, GICv4.1 has grown a VPE-aware INVLPI register.
> Let's plumb it in and make use of the DirectLPI code in that case.
>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
> drivers/irqchip/irq-gic-v3-its.c | 19 +++++++++++++++++--
> include/linux/irqchip/arm-gic-v3.h | 1 +
> 2 files changed, 18 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
> index b791c9beddf2..34595a7fcccb 100644
> --- a/drivers/irqchip/irq-gic-v3-its.c
> +++ b/drivers/irqchip/irq-gic-v3-its.c
> @@ -1200,13 +1200,27 @@ static void wait_for_syncr(void __iomem *rdbase)
>
> static void direct_lpi_inv(struct irq_data *d)
> {
> + struct its_vlpi_map *map = get_vlpi_map(d);
> struct its_collection *col;
> void __iomem *rdbase;
> + u64 val;
> +
> + if (map) {
> + struct its_device *its_dev = irq_data_get_irq_chip_data(d);
> +
> + WARN_ON(!is_v4_1(its_dev->its));
> +
> + val = GICR_INVLPIR_V;
> + val |= FIELD_PREP(GICR_INVLPIR_VPEID, map->vpe->vpe_id);
> + val |= FIELD_PREP(GICR_INVLPIR_INTID, map->vintid);
> + } else {
> + val = d->hwirq;
> + }
>
> /* Target the redistributor this LPI is currently routed to */
> col = irq_to_col(d);
I think irq_to_col() may not work when GICv4.1 VLPIs are involved in.
irq_to_col() gives us col_map[event] as the target redistributor,
but the correct one for VLPIs should be vlpi_maps[event]->vpe->col_idx.
These two are not always pointing to the same physical RD.
For example, if guest issues a MOVI against a VLPI, we will update the
corresponding vlpi_map->vpe and issue a VMOVI on ITS... but leave the
col_map[event] unchanged.
col_map[event] usually describes the physical LPI's CPU affinity, but
when this physical LPI serves as something which the VLPI is backed by,
we take really little care of it. Did I miss something here?
Thanks,
zenghui
> rdbase = per_cpu_ptr(gic_rdists->rdist, col->col_id)->rd_base;
> - gic_write_lpir(d->hwirq, rdbase + GICR_INVLPIR);
> + gic_write_lpir(val, rdbase + GICR_INVLPIR);
>
> wait_for_syncr(rdbase);
> }
> @@ -1216,7 +1230,8 @@ static void lpi_update_config(struct irq_data *d, u8 clr, u8 set)
> struct its_device *its_dev = irq_data_get_irq_chip_data(d);
>
> lpi_write_config(d, clr, set);
> - if (gic_rdists->has_direct_lpi && !irqd_is_forwarded_to_vcpu(d))
> + if (gic_rdists->has_direct_lpi &&
> + (is_v4_1(its_dev->its) || !irqd_is_forwarded_to_vcpu(d)))
> direct_lpi_inv(d);
> else
> its_send_inv(its_dev, its_get_event_id(d));
> diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
> index b69f60792554..5f3278cbf247 100644
> --- a/include/linux/irqchip/arm-gic-v3.h
> +++ b/include/linux/irqchip/arm-gic-v3.h
> @@ -247,6 +247,7 @@
> #define GICR_TYPER_COMMON_LPI_AFF GENMASK_ULL(25, 24)
> #define GICR_TYPER_AFFINITY GENMASK_ULL(63, 32)
>
> +#define GICR_INVLPIR_INTID GENMASK_ULL(31, 0)
> #define GICR_INVLPIR_VPEID GENMASK_ULL(47, 32)
> #define GICR_INVLPIR_V GENMASK_ULL(63, 63)
>
>
next prev parent reply other threads:[~2019-09-28 2:05 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-23 18:25 [PATCH 00/35] irqchip/gic-v4: GICv4.1 architecture support Marc Zyngier
2019-09-23 18:25 ` [PATCH 01/35] KVM: arm64: vgic-v4: Move the GICv4 residency flow to be driven by vcpu_load/put Marc Zyngier
2019-09-23 18:25 ` [PATCH 02/35] irqchip/gic-v3-its: Factor out wait_for_syncr primitive Marc Zyngier
2019-09-24 8:58 ` Andrew Murray
2019-09-23 18:25 ` [PATCH 03/35] irqchip/gic-v3-its: Allow LPI invalidation via the DirectLPI interface Marc Zyngier
2019-09-26 14:57 ` Zenghui Yu
2019-09-26 15:34 ` Marc Zyngier
2019-09-26 16:17 ` Marc Zyngier
2019-09-27 6:59 ` Zenghui Yu
2019-09-23 18:25 ` [PATCH 04/35] irqchip/gic-v3: Detect GICv4.1 supporting RVPEID Marc Zyngier
2019-09-24 10:24 ` Andrew Murray
2019-09-24 10:49 ` Marc Zyngier
2019-09-24 11:00 ` Andrew Murray
2019-09-24 11:18 ` Marc Zyngier
2019-09-23 18:25 ` [PATCH 05/35] irqchip/gic-v3: Add GICv4.1 VPEID size discovery Marc Zyngier
2019-09-24 10:49 ` Andrew Murray
2019-09-24 11:00 ` Marc Zyngier
2019-09-23 18:25 ` [PATCH 06/35] irqchip/gic-v3-its: Make is_v4 use a TYPER copy Marc Zyngier
2019-09-23 18:25 ` [PATCH 07/35] irqchip/gic-v3-its: Kill its->ite_size and use TYPER copy instead Marc Zyngier
2019-09-23 18:25 ` [PATCH 08/35] irqchip/gic-v3-its: Kill its->device_ids " Marc Zyngier
2019-09-23 18:25 ` [PATCH 09/35] irqchip/gic-v3-its: Add get_vlpi_map() helper Marc Zyngier
2019-09-23 18:25 ` [PATCH 10/35] irqchip/gic-v4.1: VPE table (aka GICR_VPROPBASER) allocation Marc Zyngier
2019-09-25 13:04 ` Zenghui Yu
2019-09-25 14:41 ` Marc Zyngier
2019-09-25 17:14 ` Marc Zyngier
2019-09-26 15:19 ` Zenghui Yu
2019-09-26 15:57 ` Marc Zyngier
2019-09-26 16:27 ` Marc Zyngier
2019-09-27 2:01 ` Zenghui Yu
2019-09-27 1:59 ` Zenghui Yu
2019-09-23 18:25 ` [PATCH 11/35] irqchip/gic-v4.1: Implement the v4.1 flavour of VMAPP Marc Zyngier
2019-09-23 18:25 ` [PATCH 12/35] irqchip/gic-v4.1: Don't use the VPE proxy if RVPEID is set Marc Zyngier
2019-09-23 18:25 ` [PATCH 13/35] irqchip/gic-v4.1: Implement the v4.1 flavour of VMOVP Marc Zyngier
2019-09-23 18:25 ` [PATCH 14/35] irqchip/gic-v4.1: Plumb skeletal VPE irqchip Marc Zyngier
2019-09-23 18:25 ` [PATCH 15/35] irqchip/gic-v4.1: Add mask/unmask doorbell callbacks Marc Zyngier
2019-09-23 18:25 ` [PATCH 16/35] irqchip/gic-v4.1: Add VPE residency callback Marc Zyngier
2019-09-23 18:25 ` [PATCH 17/35] irqchip/gic-v4.1: Add VPE eviction callback Marc Zyngier
2019-09-23 18:25 ` [PATCH 18/35] irqchip/gic-v4.1: Add VPE INVALL callback Marc Zyngier
2019-09-23 18:25 ` [PATCH 19/35] irqchip/gic-v4.1: Suppress per-VLPI doorbell Marc Zyngier
2019-09-23 18:25 ` [PATCH 20/35] irqchip/gic-v4.1: Allow direct invalidation of VLPIs Marc Zyngier
2019-09-28 2:02 ` Zenghui Yu [this message]
2019-09-30 9:20 ` Marc Zyngier
2019-09-30 9:40 ` Zenghui Yu
2019-09-23 18:25 ` [PATCH 21/35] irqchip/gic-v4.1: Advertise support v4.1 to KVM Marc Zyngier
2019-09-23 18:25 ` [PATCH 22/35] irqchip/gic-v4.1: Map the ITS SGIR register page Marc Zyngier
2019-09-23 18:25 ` [PATCH 23/35] irqchip/gic-v4.1: Plumb skeletal VSGI irqchip Marc Zyngier
2019-09-23 18:25 ` [PATCH 24/35] irqchip/gic-v4.1: Add initial SGI configuration Marc Zyngier
2019-09-28 2:20 ` Zenghui Yu
2019-09-28 3:07 ` Zenghui Yu
2019-09-23 18:25 ` [PATCH 25/35] irqchip/gic-v4.1: Plumb mask/unmask SGI callbacks Marc Zyngier
2019-09-23 18:25 ` [PATCH 26/35] irqchip/gic-v4.1: Plumb get/set_irqchip_state " Marc Zyngier
2019-09-23 18:25 ` [PATCH 27/35] irqchip/gic-v4.1: Plumb set_vcpu_affinity " Marc Zyngier
2019-09-23 18:25 ` [PATCH 28/35] irqchip/gic-v4.1: Move doorbell management to the GICv4 abstraction layer Marc Zyngier
2019-09-23 18:26 ` [PATCH 29/35] irqchip/gic-v4.1: Add VSGI allocation/teardown Marc Zyngier
2019-09-23 18:26 ` [PATCH 30/35] irqchip/gic-v4.1: Add VSGI property setup Marc Zyngier
2019-09-23 18:26 ` [PATCH 31/35] irqchip/gic-v4.1: Eagerly vmap vPEs Marc Zyngier
2019-09-28 3:11 ` Zenghui Yu
2019-09-30 9:23 ` Marc Zyngier
2019-09-23 18:26 ` [PATCH 32/35] KVM: arm64: GICv4.1: Let doorbells be auto-enabled Marc Zyngier
2019-09-23 18:26 ` [PATCH 33/35] KVM: arm64: GICv4.1: Add direct injection capability to SGI registers Marc Zyngier
2019-09-23 18:26 ` [PATCH 34/35] KVM: arm64: GICv4.1: Configure SGIs as HW interrupts Marc Zyngier
2019-09-23 18:26 ` [PATCH 35/35] KVM: arm64: GICv4.1: Expose HW-based SGIs in debugfs Marc Zyngier
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