From 54d41c3de0d7399398c1b7f0c36414b2a6b15ba5 Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Thu, 18 Aug 2016 03:00:22 +0200 Subject: [PATCH 04/37] x86-iommu: introduce parent class RH-Author: Peter Xu Message-id: <1471489253-2811-4-git-send-email-peterx@redhat.com> Patchwork-id: 71988 O-Subject: [RHEL-7.3 qemu-kvm-rhev v2 03/34] x86-iommu: introduce parent class Bugzilla: 1358653 RH-Acked-by: Marcel Apfelbaum RH-Acked-by: Paolo Bonzini RH-Acked-by: Radim Krcmar Introducing parent class for intel-iommu devices named "x86-iommu". This is preparation work to abstract shared functionalities out from Intel and AMD IOMMUs. Currently, only the parent class is introduced. It does nothing yet. Signed-off-by: Peter Xu Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin (cherry picked from commit 1c7955c4503211f45a83e6480bd876f079ba5cd8) Signed-off-by: Peter Xu Signed-off-by: Miroslav Rezanina --- hw/i386/Makefile.objs | 2 +- hw/i386/intel_iommu.c | 5 ++-- hw/i386/x86-iommu.c | 53 +++++++++++++++++++++++++++++++++++++++++++ include/hw/i386/intel_iommu.h | 3 ++- include/hw/i386/x86-iommu.h | 46 +++++++++++++++++++++++++++++++++++++ 5 files changed, 105 insertions(+), 4 deletions(-) create mode 100644 hw/i386/x86-iommu.c create mode 100644 include/hw/i386/x86-iommu.h diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs index b52d5b8..90e94ff 100644 --- a/hw/i386/Makefile.objs +++ b/hw/i386/Makefile.objs @@ -2,7 +2,7 @@ obj-$(CONFIG_KVM) += kvm/ obj-y += multiboot.o obj-y += pc.o pc_piix.o pc_q35.o obj-y += pc_sysfw.o -obj-y += intel_iommu.o +obj-y += x86-iommu.o intel_iommu.o obj-$(CONFIG_XEN) += ../xenpv/ xen/ obj-y += kvmvapic.o diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 464f2a0..a430d7d 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -2061,17 +2061,18 @@ static void vtd_realize(DeviceState *dev, Error **errp) static void vtd_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); + X86IOMMUClass *x86_class = X86_IOMMU_CLASS(klass); dc->reset = vtd_reset; - dc->realize = vtd_realize; dc->vmsd = &vtd_vmstate; dc->props = vtd_properties; dc->hotpluggable = false; + x86_class->realize = vtd_realize; } static const TypeInfo vtd_info = { .name = TYPE_INTEL_IOMMU_DEVICE, - .parent = TYPE_SYS_BUS_DEVICE, + .parent = TYPE_X86_IOMMU_DEVICE, .instance_size = sizeof(IntelIOMMUState), .class_init = vtd_class_init, }; diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c new file mode 100644 index 0000000..d739afb --- /dev/null +++ b/hw/i386/x86-iommu.c @@ -0,0 +1,53 @@ +/* + * QEMU emulation of common X86 IOMMU + * + * Copyright (C) 2016 Peter Xu, Red Hat + * + * 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 "qemu/osdep.h" +#include "hw/sysbus.h" +#include "hw/boards.h" +#include "hw/i386/x86-iommu.h" + +static void x86_iommu_realize(DeviceState *dev, Error **errp) +{ + X86IOMMUClass *x86_class = X86_IOMMU_GET_CLASS(dev); + if (x86_class->realize) { + x86_class->realize(dev, errp); + } +} + +static void x86_iommu_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + dc->realize = x86_iommu_realize; +} + +static const TypeInfo x86_iommu_info = { + .name = TYPE_X86_IOMMU_DEVICE, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(X86IOMMUState), + .class_init = x86_iommu_class_init, + .class_size = sizeof(X86IOMMUClass), + .abstract = true, +}; + +static void x86_iommu_register_types(void) +{ + type_register_static(&x86_iommu_info); +} + +type_init(x86_iommu_register_types) diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h index b024ffa..680a0c4 100644 --- a/include/hw/i386/intel_iommu.h +++ b/include/hw/i386/intel_iommu.h @@ -23,6 +23,7 @@ #define INTEL_IOMMU_H #include "hw/qdev.h" #include "sysemu/dma.h" +#include "hw/i386/x86-iommu.h" #define TYPE_INTEL_IOMMU_DEVICE "intel-iommu" #define INTEL_IOMMU_DEVICE(obj) \ @@ -90,7 +91,7 @@ struct VTDIOTLBEntry { /* The iommu (DMAR) device state struct */ struct IntelIOMMUState { - SysBusDevice busdev; + X86IOMMUState x86_iommu; MemoryRegion csrmem; uint8_t csr[DMAR_REG_SIZE]; /* register values */ uint8_t wmask[DMAR_REG_SIZE]; /* R/W bytes */ diff --git a/include/hw/i386/x86-iommu.h b/include/hw/i386/x86-iommu.h new file mode 100644 index 0000000..924f39a --- /dev/null +++ b/include/hw/i386/x86-iommu.h @@ -0,0 +1,46 @@ +/* + * Common IOMMU interface for X86 platform + * + * Copyright (C) 2016 Peter Xu, Red Hat + * + * 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 . + */ + +#ifndef IOMMU_COMMON_H +#define IOMMU_COMMON_H + +#include "hw/sysbus.h" + +#define TYPE_X86_IOMMU_DEVICE ("x86-iommu") +#define X86_IOMMU_DEVICE(obj) \ + OBJECT_CHECK(X86IOMMUState, (obj), TYPE_X86_IOMMU_DEVICE) +#define X86_IOMMU_CLASS(klass) \ + OBJECT_CLASS_CHECK(X86IOMMUClass, (klass), TYPE_X86_IOMMU_DEVICE) +#define X86_IOMMU_GET_CLASS(obj) \ + OBJECT_GET_CLASS(X86IOMMUClass, obj, TYPE_X86_IOMMU_DEVICE) + +typedef struct X86IOMMUState X86IOMMUState; +typedef struct X86IOMMUClass X86IOMMUClass; + +struct X86IOMMUClass { + SysBusDeviceClass parent; + /* Intel/AMD specific realize() hook */ + DeviceRealize realize; +}; + +struct X86IOMMUState { + SysBusDevice busdev; +}; + +#endif -- 1.8.3.1