linux-kernel - [PATCH v5 00/11] RISC-V IMSIC driver improvements

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Message-ID: <20250209041655.331470-1-apatel@ventanamicro.com>
Date: Sun,  9 Feb 2025 09:46:44 +0530
From: Anup Patel <apatel@...tanamicro.com>
To: Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	x86@...nel.org
Cc: hpa@...or.com,
	Marc Zyngier <maz@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Andrew Lunn <andrew@...n.ch>,
	Gregory Clement <gregory.clement@...tlin.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Atish Patra <atishp@...shpatra.org>,
	Andrew Jones <ajones@...tanamicro.com>,
	Sunil V L <sunilvl@...tanamicro.com>,
	Anup Patel <anup@...infault.org>,
	linux-riscv@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	imx@...ts.linux.dev,
	Anup Patel <apatel@...tanamicro.com>
Subject: [PATCH v5 00/11] RISC-V IMSIC driver improvements

This series is based on recent discussion on LKML:
https://lore.kernel.org/lkml/20241114161845.502027-18-ajones@ventanamicro.com/

It primarily focuses on moving to RISC-V IMSIC driver use common MSI
lib and GENERIC_PENDING_IRQ.

PATCH1 & PATCH2: Preparatory patches
PATCH3: Main patch which updates IMSIC driver to use MSI lib
PATCH4 to PATCH6: Preparatory patch for moving to GENERIC_PENDING_IRQ
PATCH7 to PATCH11: Patches use GENERIC_PENDING_IRQ in IMSIC driver

These patches can also be found in the riscv_imsic_imp_v5 branch at:
https://github.com/avpatel/linux.git

Changes since v4:
 - Updated PATCH4 with better irq_force_complete_move() implementation
   provided by Thomas.

Changes since v3:
 - Dropped PATCH1 of v3 series and updated last patch of this series
   to handle the intermediate state for non-atomic MSI update.
 - Added new PATCH6 in this series to remove stale kconfig option
   GENERIC_PENDING_IRQ_CHIPFLAGS.

Changes since v2:
 - Rebased upon Linux-6.14-rc1
 - Dropped PATCH5 of v2 series since that patch is already merged

Changes since v1:
 - Changed series subject
 - Expand this series to use GENERIC_PENDING_IRQ in IMSIC driver

Andrew Jones (1):
  irqchip/riscv-imsic: Set irq_set_affinity for IMSIC base

Anup Patel (7):
  genirq: Introduce irq_can_move_in_process_context()
  genirq: Remove unused GENERIC_PENDING_IRQ_CHIPFLAGS kconfig option
  RISC-V: Select GENERIC_PENDING_IRQ
  irqchip/riscv-imsic: Separate next and previous pointers in IMSIC
    vector
  irqchip/riscv-imsic: Implement irq_force_complete_move() for IMSIC
  irqchip/riscv-imsic: Replace hwirq with irq in the IMSIC vector
  irqchip/riscv-imsic: Special handling for non-atomic device MSI update

Thomas Gleixner (3):
  irqchip/irq-msi-lib: Optionally set default irq_eoi/irq_ack
  irqchip/riscv-imsic: Move to common MSI lib
  genirq: Introduce common irq_force_complete_move() implementation

 arch/riscv/Kconfig                         |   1 +
 arch/x86/kernel/apic/vector.c              | 231 ++++++++++-----------
 drivers/irqchip/Kconfig                    |   8 +-
 drivers/irqchip/irq-gic-v2m.c              |   1 +
 drivers/irqchip/irq-imx-mu-msi.c           |   1 +
 drivers/irqchip/irq-msi-lib.c              |  11 +-
 drivers/irqchip/irq-mvebu-gicp.c           |   1 +
 drivers/irqchip/irq-mvebu-odmi.c           |   1 +
 drivers/irqchip/irq-mvebu-sei.c            |   1 +
 drivers/irqchip/irq-riscv-imsic-early.c    |  14 +-
 drivers/irqchip/irq-riscv-imsic-platform.c | 197 +++++++++---------
 drivers/irqchip/irq-riscv-imsic-state.c    | 152 ++++++++++----
 drivers/irqchip/irq-riscv-imsic-state.h    |  12 +-
 include/linux/irq.h                        |   7 +-
 include/linux/msi.h                        |  11 +
 kernel/irq/Kconfig                         |   4 -
 kernel/irq/internals.h                     |   2 +
 kernel/irq/migration.c                     |  21 ++
 18 files changed, 389 insertions(+), 287 deletions(-)

-- 
2.43.0