From 180ae7b1182344ca617d8b5200306b02a6b5075d Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Fri, 22 Jul 2016 16:20:41 +0000 Subject: KVM: arm/arm64: Enable irqchip routing This patch adds compilation and link against irqchip. Main motivation behind using irqchip code is to enable MSI routing code. In the future irqchip routing may also be useful when targeting multiple irqchips. Routing standard callbacks now are implemented in vgic-irqfd: - kvm_set_routing_entry - kvm_set_irq - kvm_set_msi They only are supported with new_vgic code. Both HAVE_KVM_IRQCHIP and HAVE_KVM_IRQ_ROUTING are defined. KVM_CAP_IRQ_ROUTING is advertised and KVM_SET_GSI_ROUTING is allowed. So from now on IRQCHIP routing is enabled and a routing table entry must exist for irqfd injection to succeed for a given SPI. This patch builds a default flat irqchip routing table (gsi=irqchip.pin) covering all the VGIC SPI indexes. This routing table is overwritten by the first first user-space call to KVM_SET_GSI_ROUTING ioctl. MSI routing setup is not yet allowed. Signed-off-by: Eric Auger Signed-off-by: Marc Zyngier --- arch/arm/kvm/Kconfig | 2 ++ arch/arm/kvm/Makefile | 1 + arch/arm/kvm/irq.h | 19 +++++++++++++++++++ arch/arm64/kvm/Kconfig | 2 ++ arch/arm64/kvm/Makefile | 1 + arch/arm64/kvm/irq.h | 19 +++++++++++++++++++ 6 files changed, 44 insertions(+) create mode 100644 arch/arm/kvm/irq.h create mode 100644 arch/arm64/kvm/irq.h (limited to 'arch') diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig index 95a000515e43..3e1cd0452d67 100644 --- a/arch/arm/kvm/Kconfig +++ b/arch/arm/kvm/Kconfig @@ -32,6 +32,8 @@ config KVM select KVM_VFIO select HAVE_KVM_EVENTFD select HAVE_KVM_IRQFD + select HAVE_KVM_IRQCHIP + select HAVE_KVM_IRQ_ROUTING depends on ARM_VIRT_EXT && ARM_LPAE && ARM_ARCH_TIMER ---help--- Support hosting virtualized guest machines. diff --git a/arch/arm/kvm/Makefile b/arch/arm/kvm/Makefile index 5e28df80dca7..10d77a66cad5 100644 --- a/arch/arm/kvm/Makefile +++ b/arch/arm/kvm/Makefile @@ -29,4 +29,5 @@ obj-y += $(KVM)/arm/vgic/vgic-v2.o obj-y += $(KVM)/arm/vgic/vgic-mmio.o obj-y += $(KVM)/arm/vgic/vgic-mmio-v2.o obj-y += $(KVM)/arm/vgic/vgic-kvm-device.o +obj-y += $(KVM)/irqchip.o obj-y += $(KVM)/arm/arch_timer.o diff --git a/arch/arm/kvm/irq.h b/arch/arm/kvm/irq.h new file mode 100644 index 000000000000..b74099b905fd --- /dev/null +++ b/arch/arm/kvm/irq.h @@ -0,0 +1,19 @@ +/* + * irq.h: in kernel interrupt controller related definitions + * Copyright (c) 2016 Red Hat, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This header is included by irqchip.c. However, on ARM, interrupt + * controller declarations are located in include/kvm/arm_vgic.h since + * they are mostly shared between arm and arm64. + */ + +#ifndef __IRQ_H +#define __IRQ_H + +#include + +#endif diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index 9d2eff0b3ad3..9c9edc98d271 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -37,6 +37,8 @@ config KVM select KVM_ARM_VGIC_V3 select KVM_ARM_PMU if HW_PERF_EVENTS select HAVE_KVM_MSI + select HAVE_KVM_IRQCHIP + select HAVE_KVM_IRQ_ROUTING ---help--- Support hosting virtualized guest machines. We don't support KVM with 16K page tables yet, due to the multiple diff --git a/arch/arm64/kvm/Makefile b/arch/arm64/kvm/Makefile index a5b96642a9cb..695eb3c7ef41 100644 --- a/arch/arm64/kvm/Makefile +++ b/arch/arm64/kvm/Makefile @@ -30,5 +30,6 @@ kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-mmio-v2.o kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-mmio-v3.o kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-kvm-device.o kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-its.o +kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/irqchip.o kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/arch_timer.o kvm-$(CONFIG_KVM_ARM_PMU) += $(KVM)/arm/pmu.o diff --git a/arch/arm64/kvm/irq.h b/arch/arm64/kvm/irq.h new file mode 100644 index 000000000000..b74099b905fd --- /dev/null +++ b/arch/arm64/kvm/irq.h @@ -0,0 +1,19 @@ +/* + * irq.h: in kernel interrupt controller related definitions + * Copyright (c) 2016 Red Hat, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This header is included by irqchip.c. However, on ARM, interrupt + * controller declarations are located in include/kvm/arm_vgic.h since + * they are mostly shared between arm and arm64. + */ + +#ifndef __IRQ_H +#define __IRQ_H + +#include + +#endif -- cgit v1.2.1