From a7bf30342e6a7924132a5c70047928261d3c7e42 Mon Sep 17 00:00:00 2001 From: Pavel Fedin Date: Thu, 24 Sep 2015 01:29:37 +0100 Subject: [PATCH] hw/intc: Initial implementation of vGICv3 This is the initial version of KVM-accelerated GICv3 support. State load and save are not yet supported, live migration is not possible. In order to get correct class name in a simpler way, gicv3_class_name() function is implemented, similar to gic_class_name(). Signed-off-by: Pavel Fedin Reviewed-by: Peter Maydell Tested-by: Ashok kumar Message-id: 69d8f01d14994d7a1a140e96aef59fd332d02293.1441784344.git.p.fedin@samsung.com Signed-off-by: Peter Maydell --- hw/intc/Makefile.objs | 1 + hw/intc/arm_gicv3_kvm.c | 149 ++++++++++++++++++++++++++++++++++++++++++++++++ target-arm/kvm_arm.h | 10 ++++ target-arm/machine.c | 18 ++++++ 4 files changed, 178 insertions(+) create mode 100644 hw/intc/arm_gicv3_kvm.c diff --git a/hw/intc/Makefile.objs b/hw/intc/Makefile.objs index 1317e5a5b4..004b0c25e4 100644 --- a/hw/intc/Makefile.objs +++ b/hw/intc/Makefile.objs @@ -17,6 +17,7 @@ common-obj-$(CONFIG_OPENPIC) += openpic.o obj-$(CONFIG_APIC) += apic.o apic_common.o obj-$(CONFIG_ARM_GIC_KVM) += arm_gic_kvm.o +obj-$(call land,$(CONFIG_ARM_GIC_KVM),$(TARGET_AARCH64)) += arm_gicv3_kvm.o obj-$(CONFIG_STELLARIS) += armv7m_nvic.o obj-$(CONFIG_EXYNOS4) += exynos4210_gic.o exynos4210_combiner.o obj-$(CONFIG_GRLIB) += grlib_irqmp.o diff --git a/hw/intc/arm_gicv3_kvm.c b/hw/intc/arm_gicv3_kvm.c new file mode 100644 index 0000000000..b48f78f13d --- /dev/null +++ b/hw/intc/arm_gicv3_kvm.c @@ -0,0 +1,149 @@ +/* + * ARM Generic Interrupt Controller using KVM in-kernel support + * + * Copyright (c) 2015 Samsung Electronics Co., Ltd. + * Written by Pavel Fedin + * Based on vGICv2 code by Peter Maydell + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see . + */ + +#include "hw/intc/arm_gicv3_common.h" +#include "hw/sysbus.h" +#include "sysemu/kvm.h" +#include "kvm_arm.h" +#include "vgic_common.h" + +#ifdef DEBUG_GICV3_KVM +#define DPRINTF(fmt, ...) \ + do { fprintf(stderr, "kvm_gicv3: " fmt, ## __VA_ARGS__); } while (0) +#else +#define DPRINTF(fmt, ...) \ + do { } while (0) +#endif + +#define TYPE_KVM_ARM_GICV3 "kvm-arm-gicv3" +#define KVM_ARM_GICV3(obj) \ + OBJECT_CHECK(GICv3State, (obj), TYPE_KVM_ARM_GICV3) +#define KVM_ARM_GICV3_CLASS(klass) \ + OBJECT_CLASS_CHECK(KVMARMGICv3Class, (klass), TYPE_KVM_ARM_GICV3) +#define KVM_ARM_GICV3_GET_CLASS(obj) \ + OBJECT_GET_CLASS(KVMARMGICv3Class, (obj), TYPE_KVM_ARM_GICV3) + +typedef struct KVMARMGICv3Class { + ARMGICv3CommonClass parent_class; + DeviceRealize parent_realize; + void (*parent_reset)(DeviceState *dev); +} KVMARMGICv3Class; + +static void kvm_arm_gicv3_set_irq(void *opaque, int irq, int level) +{ + GICv3State *s = (GICv3State *)opaque; + + kvm_arm_gic_set_irq(s->num_irq, irq, level); +} + +static void kvm_arm_gicv3_put(GICv3State *s) +{ + /* TODO */ + DPRINTF("Cannot put kernel gic state, no kernel interface\n"); +} + +static void kvm_arm_gicv3_get(GICv3State *s) +{ + /* TODO */ + DPRINTF("Cannot get kernel gic state, no kernel interface\n"); +} + +static void kvm_arm_gicv3_reset(DeviceState *dev) +{ + GICv3State *s = ARM_GICV3_COMMON(dev); + KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s); + + DPRINTF("Reset\n"); + + kgc->parent_reset(dev); + kvm_arm_gicv3_put(s); +} + +static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp) +{ + GICv3State *s = KVM_ARM_GICV3(dev); + KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s); + Error *local_err = NULL; + + DPRINTF("kvm_arm_gicv3_realize\n"); + + kgc->parent_realize(dev, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + + if (s->security_extn) { + error_setg(errp, "the in-kernel VGICv3 does not implement the " + "security extensions"); + return; + } + + gicv3_init_irqs_and_mmio(s, kvm_arm_gicv3_set_irq, NULL); + + /* Try to create the device via the device control API */ + s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_V3, false); + if (s->dev_fd < 0) { + error_setg_errno(errp, -s->dev_fd, "error creating in-kernel VGIC"); + return; + } + + kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_NR_IRQS, + 0, &s->num_irq, true); + + /* Tell the kernel to complete VGIC initialization now */ + kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, + KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true); + + kvm_arm_register_device(&s->iomem_dist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR, + KVM_VGIC_V3_ADDR_TYPE_DIST, s->dev_fd); + kvm_arm_register_device(&s->iomem_redist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR, + KVM_VGIC_V3_ADDR_TYPE_REDIST, s->dev_fd); +} + +static void kvm_arm_gicv3_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + ARMGICv3CommonClass *agcc = ARM_GICV3_COMMON_CLASS(klass); + KVMARMGICv3Class *kgc = KVM_ARM_GICV3_CLASS(klass); + + agcc->pre_save = kvm_arm_gicv3_get; + agcc->post_load = kvm_arm_gicv3_put; + kgc->parent_realize = dc->realize; + kgc->parent_reset = dc->reset; + dc->realize = kvm_arm_gicv3_realize; + dc->reset = kvm_arm_gicv3_reset; +} + +static const TypeInfo kvm_arm_gicv3_info = { + .name = TYPE_KVM_ARM_GICV3, + .parent = TYPE_ARM_GICV3_COMMON, + .instance_size = sizeof(GICv3State), + .class_init = kvm_arm_gicv3_class_init, + .class_size = sizeof(KVMARMGICv3Class), +}; + +static void kvm_arm_gicv3_register_types(void) +{ + type_register_static(&kvm_arm_gicv3_info); +} + +type_init(kvm_arm_gicv3_register_types) diff --git a/target-arm/kvm_arm.h b/target-arm/kvm_arm.h index 10ce771f65..b516041779 100644 --- a/target-arm/kvm_arm.h +++ b/target-arm/kvm_arm.h @@ -205,4 +205,14 @@ static inline const char *gic_class_name(void) return kvm_irqchip_in_kernel() ? "kvm-arm-gic" : "arm_gic"; } +/** + * gicv3_class_name + * + * Return name of GICv3 class to use depending on whether KVM acceleration is + * in use. May throw an error if the chosen implementation is not available. + * + * Returns: class name to use + */ +const char *gicv3_class_name(void); + #endif diff --git a/target-arm/machine.c b/target-arm/machine.c index 32adfe792e..36a0d159cc 100644 --- a/target-arm/machine.c +++ b/target-arm/machine.c @@ -1,5 +1,6 @@ #include "hw/hw.h" #include "hw/boards.h" +#include "qemu/error-report.h" #include "sysemu/kvm.h" #include "kvm_arm.h" #include "internals.h" @@ -328,3 +329,20 @@ const VMStateDescription vmstate_arm_cpu = { NULL } }; + +const char *gicv3_class_name(void) +{ + if (kvm_irqchip_in_kernel()) { +#ifdef TARGET_AARCH64 + return "kvm-arm-gicv3"; +#else + error_report("KVM GICv3 acceleration is not supported on this " + "platform\n"); +#endif + } else { + /* TODO: Software emulation is not implemented yet */ + error_report("KVM is currently required for GICv3 emulation\n"); + } + + exit(1); +} -- 2.11.4.GIT