From: Lorenzo Pieralisi <lpieralisi@kernel.org> To: linux-kernel@vger.kernel.org Cc: Lorenzo Pieralisi <lpieralisi@kernel.org>, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, Mark Rutland <mark.rutland@arm.com>, Robin Murphy <robin.murphy@arm.com>, "Rafael J. Wysocki" <rafael@kernel.org>, Rob Herring <robh+dt@kernel.org>, Fang Xiang <fangxiang3@xiaomi.com>, Marc Zyngier <maz@kernel.org> Subject: [PATCH v3 0/5] irqchip/gic-v3: Enable non-coherent GIC designs probing Date: Fri, 6 Oct 2023 14:59:24 +0200 [thread overview] Message-ID: <20231006125929.48591-1-lpieralisi@kernel.org> (raw) In-Reply-To: <20230905104721.52199-1-lpieralisi@kernel.org> This series is v3 of previous series: v2: https://lore.kernel.org/all/20230906094139.16032-1-lpieralisi@kernel.org v1: https://lore.kernel.org/all/20230905104721.52199-1-lpieralisi@kernel.org v2 -> v3: - Added ACPICA temporary changes and ACPI changes to implement ECR https://bugzilla.tianocore.org/show_bug.cgi?id=4557 - ACPI changes are for testing purposes - subject to ECR code first approval v1 -> v2: - Updated DT bindings as per feedback - Updated patch[2] to use GIC quirks infrastructure Original cover letter --- The GICv3 architecture specifications provide a means for the system programmer to set the shareability and cacheability attributes the GIC components (redistributors and ITSes) use to drive memory transactions. Albeit the architecture give control over shareability/cacheability memory transactions attributes (and barriers), it is allowed to connect the GIC interconnect ports to non-coherent memory ports on the interconnect, basically tying off shareability/cacheability "wires" and de-facto making the redistributors and ITSes non-coherent memory observers. This series aims at starting a discussion over a possible solution to this problem, by adding to the GIC device tree bindings the standard dma-noncoherent property. The GIC driver uses the property to force the redistributors and ITSes shareability attributes to non-shareable, which consequently forces the driver to use CMOs on GIC memory tables. On ARM DT DMA is default non-coherent, so the GIC driver can't rely on the generic DT dma-coherent/non-coherent property management layer (of_dma_is_coherent()) which would default all GIC designs in the field as non-coherent; it has to rely on ad-hoc dma-noncoherent property handling. When a consistent approach is agreed upon for DT an equivalent binding will be put forward for ACPI based systems. Lorenzo Pieralisi (4): dt-bindings: interrupt-controller: arm,gic-v3: Add dma-noncoherent property irqchip/gic-v3: Enable non-coherent redistributors/ITSes DT probing ACPICA: Add new MADT GICC/GICR/ITS flags handling [code first] irqchip/gic-v3: Enable non-coherent redistributors/ITSes ACPI probing Marc Zyngier (1): irqchip/gic-v3-its: Split allocation from initialisation of its_node .../interrupt-controller/arm,gic-v3.yaml | 12 ++ drivers/acpi/processor_core.c | 21 +++ drivers/irqchip/irq-gic-common.h | 12 ++ drivers/irqchip/irq-gic-v3-its.c | 174 +++++++++++------- drivers/irqchip/irq-gic-v3.c | 22 +++ include/acpi/actbl2.h | 11 +- include/linux/acpi.h | 3 + 7 files changed, 189 insertions(+), 66 deletions(-) -- 2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Lorenzo Pieralisi <lpieralisi@kernel.org> To: linux-kernel@vger.kernel.org Cc: Lorenzo Pieralisi <lpieralisi@kernel.org>, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, Mark Rutland <mark.rutland@arm.com>, Robin Murphy <robin.murphy@arm.com>, "Rafael J. Wysocki" <rafael@kernel.org>, Rob Herring <robh+dt@kernel.org>, Fang Xiang <fangxiang3@xiaomi.com>, Marc Zyngier <maz@kernel.org> Subject: [PATCH v3 0/5] irqchip/gic-v3: Enable non-coherent GIC designs probing Date: Fri, 6 Oct 2023 14:59:24 +0200 [thread overview] Message-ID: <20231006125929.48591-1-lpieralisi@kernel.org> (raw) In-Reply-To: <20230905104721.52199-1-lpieralisi@kernel.org> This series is v3 of previous series: v2: https://lore.kernel.org/all/20230906094139.16032-1-lpieralisi@kernel.org v1: https://lore.kernel.org/all/20230905104721.52199-1-lpieralisi@kernel.org v2 -> v3: - Added ACPICA temporary changes and ACPI changes to implement ECR https://bugzilla.tianocore.org/show_bug.cgi?id=4557 - ACPI changes are for testing purposes - subject to ECR code first approval v1 -> v2: - Updated DT bindings as per feedback - Updated patch[2] to use GIC quirks infrastructure Original cover letter --- The GICv3 architecture specifications provide a means for the system programmer to set the shareability and cacheability attributes the GIC components (redistributors and ITSes) use to drive memory transactions. Albeit the architecture give control over shareability/cacheability memory transactions attributes (and barriers), it is allowed to connect the GIC interconnect ports to non-coherent memory ports on the interconnect, basically tying off shareability/cacheability "wires" and de-facto making the redistributors and ITSes non-coherent memory observers. This series aims at starting a discussion over a possible solution to this problem, by adding to the GIC device tree bindings the standard dma-noncoherent property. The GIC driver uses the property to force the redistributors and ITSes shareability attributes to non-shareable, which consequently forces the driver to use CMOs on GIC memory tables. On ARM DT DMA is default non-coherent, so the GIC driver can't rely on the generic DT dma-coherent/non-coherent property management layer (of_dma_is_coherent()) which would default all GIC designs in the field as non-coherent; it has to rely on ad-hoc dma-noncoherent property handling. When a consistent approach is agreed upon for DT an equivalent binding will be put forward for ACPI based systems. Lorenzo Pieralisi (4): dt-bindings: interrupt-controller: arm,gic-v3: Add dma-noncoherent property irqchip/gic-v3: Enable non-coherent redistributors/ITSes DT probing ACPICA: Add new MADT GICC/GICR/ITS flags handling [code first] irqchip/gic-v3: Enable non-coherent redistributors/ITSes ACPI probing Marc Zyngier (1): irqchip/gic-v3-its: Split allocation from initialisation of its_node .../interrupt-controller/arm,gic-v3.yaml | 12 ++ drivers/acpi/processor_core.c | 21 +++ drivers/irqchip/irq-gic-common.h | 12 ++ drivers/irqchip/irq-gic-v3-its.c | 174 +++++++++++------- drivers/irqchip/irq-gic-v3.c | 22 +++ include/acpi/actbl2.h | 11 +- include/linux/acpi.h | 3 + 7 files changed, 189 insertions(+), 66 deletions(-) -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-10-06 12:59 UTC|newest] Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-09-05 10:47 [PATCH 0/2] irqchip/gic-v3: Enable non-coherent GIC designs probing Lorenzo Pieralisi 2023-09-05 10:47 ` Lorenzo Pieralisi 2023-09-05 10:47 ` [PATCH 1/2] dt-bindings: interrupt-controller: arm,gic-v3: Add dma-noncoherent property Lorenzo Pieralisi 2023-09-05 10:47 ` Lorenzo Pieralisi 2023-09-05 11:17 ` Robin Murphy 2023-09-05 11:17 ` Robin Murphy 2023-09-05 12:22 ` Lorenzo Pieralisi 2023-09-05 12:22 ` Lorenzo Pieralisi 2023-09-05 12:57 ` Robin Murphy 2023-09-05 12:57 ` Robin Murphy 2023-09-05 18:23 ` Rob Herring 2023-09-05 18:23 ` Rob Herring 2023-09-05 10:47 ` [PATCH 2/2] irqchip/gic-v3: Enable non-coherent redistributors/ITSes probing Lorenzo Pieralisi 2023-09-05 10:47 ` Lorenzo Pieralisi 2023-09-05 11:34 ` Marc Zyngier 2023-09-05 11:34 ` Marc Zyngier 2023-09-05 12:14 ` Robin Murphy 2023-09-05 12:14 ` Robin Murphy 2023-09-05 12:30 ` Lorenzo Pieralisi 2023-09-05 12:30 ` Lorenzo Pieralisi 2023-09-05 12:41 ` Marc Zyngier 2023-09-05 12:41 ` Marc Zyngier 2023-09-05 14:24 ` Lorenzo Pieralisi 2023-09-05 14:24 ` Lorenzo Pieralisi 2023-09-05 14:34 ` Marc Zyngier 2023-09-05 14:34 ` Marc Zyngier 2023-09-06 11:01 ` Fang Xiang 2023-09-06 11:01 ` Fang Xiang 2023-09-06 11:10 ` Marc Zyngier 2023-10-03 14:43 ` Lorenzo Pieralisi 2023-10-03 14:43 ` Lorenzo Pieralisi 2023-10-03 16:18 ` Robin Murphy 2023-10-03 16:18 ` Robin Murphy 2023-10-03 16:44 ` Marc Zyngier 2023-10-03 16:44 ` Marc Zyngier 2023-10-04 7:13 ` Lorenzo Pieralisi 2023-10-04 7:13 ` Lorenzo Pieralisi 2023-10-05 13:59 ` Lorenzo Pieralisi 2023-10-05 13:59 ` Lorenzo Pieralisi 2023-09-06 9:41 ` [PATCH v2 0/2] irqchip/gic-v3: Enable non-coherent GIC designs probing Lorenzo Pieralisi 2023-09-06 9:41 ` Lorenzo Pieralisi 2023-09-06 9:41 ` [PATCH v2 1/2] dt-bindings: interrupt-controller: arm,gic-v3: Add dma-noncoherent property Lorenzo Pieralisi 2023-09-06 9:41 ` Lorenzo Pieralisi 2023-09-06 11:23 ` Rob Herring 2023-09-06 11:23 ` Rob Herring 2023-09-06 11:27 ` Lorenzo Pieralisi 2023-09-06 11:27 ` Lorenzo Pieralisi 2023-09-06 9:41 ` [PATCH v2 2/2] irqchip/gic-v3: Enable non-coherent redistributors/ITSes probing Lorenzo Pieralisi 2023-09-06 9:41 ` Lorenzo Pieralisi 2023-09-06 9:52 ` [PATCH v2 0/2] irqchip/gic-v3: Enable non-coherent GIC designs probing Marc Zyngier 2023-09-06 9:52 ` Marc Zyngier 2023-09-06 11:23 ` Lorenzo Pieralisi 2023-09-06 11:23 ` Lorenzo Pieralisi 2023-09-21 10:11 ` Lorenzo Pieralisi 2023-09-21 10:11 ` Lorenzo Pieralisi 2023-10-06 12:59 ` Lorenzo Pieralisi [this message] 2023-10-06 12:59 ` [PATCH v3 0/5] " Lorenzo Pieralisi 2023-10-06 12:59 ` [PATCH v3 1/5] dt-bindings: interrupt-controller: arm,gic-v3: Add dma-noncoherent property Lorenzo Pieralisi 2023-10-06 12:59 ` Lorenzo Pieralisi 2023-10-07 12:00 ` [irqchip: irq/irqchip-fixes] " irqchip-bot for Lorenzo Pieralisi 2023-10-06 12:59 ` [PATCH v3 2/5] irqchip/gic-v3: Enable non-coherent redistributors/ITSes DT probing Lorenzo Pieralisi 2023-10-06 12:59 ` Lorenzo Pieralisi 2023-10-07 12:00 ` [irqchip: irq/irqchip-fixes] " irqchip-bot for Lorenzo Pieralisi 2023-10-06 12:59 ` [PATCH v3 3/5] irqchip/gic-v3-its: Split allocation from initialisation of its_node Lorenzo Pieralisi 2023-10-06 12:59 ` Lorenzo Pieralisi 2023-10-07 12:00 ` [irqchip: irq/irqchip-fixes] " irqchip-bot for Marc Zyngier 2023-10-24 8:48 ` [PATCH v3 3/5] " Dominic Rath 2023-10-24 8:48 ` Dominic Rath 2023-10-24 10:18 ` Marc Zyngier 2023-10-24 10:18 ` Marc Zyngier 2023-10-24 13:13 ` Dominic Rath 2023-10-24 13:13 ` Dominic Rath 2023-10-25 19:51 ` [tip: irq/urgent] irqchip/gic-v3-its: Don't override quirk settings with default values tip-bot2 for Marc Zyngier 2023-10-06 12:59 ` [PATCH v3 4/5] ACPICA: Add new MADT GICC/GICR/ITS flags handling [code first] Lorenzo Pieralisi 2023-10-06 12:59 ` Lorenzo Pieralisi 2023-10-06 12:59 ` [PATCH v3 5/5] irqchip/gic-v3: Enable non-coherent redistributors/ITSes ACPI probing Lorenzo Pieralisi 2023-10-06 12:59 ` Lorenzo Pieralisi 2023-10-17 14:19 ` Lorenzo Pieralisi 2023-10-17 14:19 ` Lorenzo Pieralisi 2023-10-17 16:44 ` Marc Zyngier 2023-10-17 16:44 ` Marc Zyngier 2023-10-18 8:42 ` Lorenzo Pieralisi 2023-10-18 8:42 ` Lorenzo Pieralisi 2023-10-19 11:12 ` Marc Zyngier 2023-10-19 11:12 ` Marc Zyngier 2023-12-27 11:00 ` [PATCH v4 0/3] irqchip/gic-v3: Enable non-coherent GIC designs probing Lorenzo Pieralisi 2023-12-27 11:00 ` Lorenzo Pieralisi 2023-12-27 11:00 ` [PATCH v4 1/3] ACPICA: MADT: Add GICC online capable bit handling Lorenzo Pieralisi 2023-12-27 11:00 ` Lorenzo Pieralisi 2024-01-09 14:27 ` Rafael J. Wysocki 2024-01-09 14:27 ` Rafael J. Wysocki 2023-12-27 11:00 ` [PATCH v4 2/3] ACPICA: MADT: Add new MADT GICC/GICR/ITS non-coherent flags handling Lorenzo Pieralisi 2023-12-27 11:00 ` Lorenzo Pieralisi 2023-12-27 11:00 ` [PATCH v4 3/3] irqchip/gic-v3: Enable non-coherent redistributors/ITSes ACPI probing Lorenzo Pieralisi 2023-12-27 11:00 ` Lorenzo Pieralisi 2024-01-04 11:12 ` Marc Zyngier 2024-01-04 11:12 ` Marc Zyngier 2024-01-08 9:43 ` Lorenzo Pieralisi 2024-01-08 9:43 ` Lorenzo Pieralisi 2024-01-08 9:52 ` Marc Zyngier 2024-01-08 9:52 ` Marc Zyngier 2024-01-22 16:18 ` Lorenzo Pieralisi 2024-01-22 16:18 ` Lorenzo Pieralisi 2024-01-22 18:27 ` Marc Zyngier 2024-01-22 18:27 ` Marc Zyngier 2024-01-03 13:43 ` [PATCH v4 0/3] irqchip/gic-v3: Enable non-coherent GIC designs probing Rafael J. Wysocki 2024-01-03 13:43 ` Rafael J. Wysocki 2024-01-04 11:34 ` Marc Zyngier 2024-01-04 11:34 ` Marc Zyngier 2024-01-04 12:04 ` Russell King (Oracle) 2024-01-04 12:04 ` Russell King (Oracle) 2024-01-04 13:21 ` Rafael J. Wysocki 2024-01-04 13:21 ` Rafael J. Wysocki 2024-01-04 13:47 ` Russell King (Oracle) 2024-01-04 13:47 ` Russell King (Oracle) 2024-01-08 9:45 ` Lorenzo Pieralisi 2024-01-08 9:45 ` Lorenzo Pieralisi
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