Hello everyone! This is V5 of the patch series to introduce eSPI support, which contains fixes and improvements based on the comments received in V4.
The main changes in this version compared to V4 are related to removing unnecessary #ifdefs that previously prevented the use of certain defines and macros, leading to an overuse of #ifdefs. After refactoring, it is now possible to reuse the existing code for vGIC eSPI emulation, which improves readability and simplifies future changes. As some patches that had already been reviewed were modified, I would ask Volodymyr and Oleksandr to take a look at the updated versions of: [4/12] xen/arm/irq: add handling for IRQs in the eSPI range [5/12] xen/arm: gicv3: implement handling of GICv3.1 eSPI The changes made in these patches allowed me to significantly simplify the following patch: [10/12] xen/arm: vgic-v3: add emulation of GICv3.1 eSPI registers For the other patches, I have addressed comments and added reviewed-by or acked-by tags accordingly, based on the received comments. 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 V4: https://github.com/LKomaryanskiy/xen/commits/espi-support-master-upstream-v5-unsquashed/ Changes in V5: - individual changes in patches Link on V4: - https://lists.xenproject.org/archives/html/xen-devel/2025-08/msg01767.html 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 | 2 + 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 | 195 +++++++++++++++++---- xen/arch/arm/gic.c | 8 +- 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 | 25 +++ xen/arch/arm/include/asm/vgic.h | 42 +++++ xen/arch/arm/irq.c | 62 ++++++- xen/arch/arm/vgic-v3.c | 198 +++++++++++++++++---- xen/arch/arm/vgic.c | 232 ++++++++++++++++++++++++- xen/arch/arm/vgic/vgic.c | 5 + 15 files changed, 778 insertions(+), 87 deletions(-) -- 2.34.1
