Hello everyone! This is the fourth version of the patch series to introduce support, which contains fixes and improvements based on the feedback received in V3. Mostly, these are minor changes in individual patches, except for the following: xen/arm: vgic-v3: add emulation of GICv3.1 eSPI registers
Now includes additional checks for domains without eSPI support to ensure they behave as they currently do when reading or writing eSPI registers - RAZ or WI as it also described in the GICv3.1 documentation, when GICD_TYPER.ESPI==0. Summarized description: This patch series adds support for the extended shared peripheral interrupt (eSPI) range (INTIDs 4096-5119 [2](ranges of INTIDs)) for Xen and guest domains. The implementation uses a generic approach to handle eSPIs, similar to regular SPIs, while maintaining compatibility with the existing SPI range. Functionality remains unchanged for setups that do not require eSPIs. The series includes: 1) General refactoring of common IRQ operations with GIC registers to improve code readability, simplify further maintenance and prepare the key functions for eSPI implementation. 2) Introducing a new Kconfig option (default n) to enable or disable eSPI support. Disabling this option prevents unnecessary resource allocation for setups that do not require eSPIs. 3) Adding additional resources to store required information and operate with up to 1024 interrupts from eSPI range. 4) Adjusting assertions and checks to pass verification for INTIDs in the eSPI range. 5) Configuration of eSPI-specific registers during GIC initialization for systems with GICv3.1+ hardware. 6) Enables eSPI MMIO emulation for vGIC, allowing guest domains to access and operate within the eSPI's INTIDs. 7) Updating documentation and CHANGELOG to reflect the changes made for eSPI support. Also, to simplify reviewing, please find below link to unsquashed patches, that are on top of every patch, that is changed in the series, compared to V3: https://github.com/LKomaryanskiy/xen/commits/espi-support-master-upstream-v4-unsquashed/ Changes in V4: - added a patch for documentation - individual changes in patches Link on V3: - https://lists.xenproject.org/archives/html/xen-devel/2025-08/msg01628.html Changes in V3: - added a patch to update CHANGELOG.md - individual changes in patches Link on V2: - https://lists.xenproject.org/archives/html/xen-devel/2025-08/msg00372.html Changes in V2: - added 2 more patches to implement helper functions for gic/vgic: xen/arm: gic: implement helper functions for INTID checks xen/arm: vgic: implement helper functions for virq checks - removed 2 patches: xen/arm/irq: allow assignment/releasing of eSPI interrupts xen/arm: gic/irq: permit routing of eSPI interrupts to Xen and domains since their functionality can be moved to appropriate patches after introducing patches with helper functions - individual changes in patches Link on V1: - https://lists.xenproject.org/archives/html/xen-devel/2025-07/msg01809.html Leonid Komarianskyi (12): xen/arm: gicv3: refactor obtaining GIC addresses for common operations xen/arm: gic: implement helper functions for INTID checks xen/arm: vgic: implement helper functions for virq checks xen/arm/irq: add handling for IRQs in the eSPI range xen/arm: gicv3: implement handling of GICv3.1 eSPI xen/arm/irq: allow eSPI processing in the gic_interrupt function xen/arm: gicv3: modify ICH_LR_PHYSICAL_MASK to allow eSPI processing xen/arm: vgic: add resource management for extended SPIs xen/arm: domain_build/dom0less-build: adjust domains config to support eSPIs xen/arm: vgic-v3: add emulation of GICv3.1 eSPI registers doc/man: update description for nr_spis with eSPI CHANGELOG.md: add mention of GICv3.1 eSPI support CHANGELOG.md | 1 + docs/man/xl.cfg.5.pod.in | 13 +- xen/arch/arm/Kconfig | 8 + xen/arch/arm/dom0less-build.c | 2 +- xen/arch/arm/domain_build.c | 2 +- xen/arch/arm/gic-v3.c | 194 +++++++++++--- xen/arch/arm/gic.c | 7 +- xen/arch/arm/include/asm/gic.h | 31 +++ xen/arch/arm/include/asm/gic_v3_defs.h | 40 ++- xen/arch/arm/include/asm/irq.h | 27 ++ xen/arch/arm/include/asm/vgic.h | 48 ++++ xen/arch/arm/irq.c | 58 ++++- xen/arch/arm/vgic-v3.c | 333 +++++++++++++++++++++++-- xen/arch/arm/vgic.c | 223 ++++++++++++++++- xen/arch/arm/vgic/vgic.c | 5 + 15 files changed, 924 insertions(+), 68 deletions(-) -- 2.34.1
