From cb035a7bf2875535a8389e61bfbdbd5c6c218cb1 Mon Sep 17 00:00:00 2001 From: "Edgar E. Iglesias" Date: Thu, 8 Aug 2024 17:52:21 +0200 Subject: [PATCH] hw/i386/xen: Add a Xen PVH x86 machine Add a Xen PVH x86 machine based on the abstract PVH Machine. Signed-off-by: Edgar E. Iglesias Reviewed-by: Stefano Stabellini --- hw/i386/xen/meson.build | 1 + hw/i386/xen/xen-pvh.c | 121 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 122 insertions(+) create mode 100644 hw/i386/xen/xen-pvh.c diff --git a/hw/i386/xen/meson.build b/hw/i386/xen/meson.build index 3f0df8bc07..c73c62b8e3 100644 --- a/hw/i386/xen/meson.build +++ b/hw/i386/xen/meson.build @@ -4,6 +4,7 @@ i386_ss.add(when: 'CONFIG_XEN', if_true: files( )) i386_ss.add(when: ['CONFIG_XEN', xen], if_true: files( 'xen-hvm.c', + 'xen-pvh.c', )) i386_ss.add(when: 'CONFIG_XEN_BUS', if_true: files( diff --git a/hw/i386/xen/xen-pvh.c b/hw/i386/xen/xen-pvh.c new file mode 100644 index 0000000000..45645667e9 --- /dev/null +++ b/hw/i386/xen/xen-pvh.c @@ -0,0 +1,121 @@ +/* + * QEMU Xen PVH x86 Machine + * + * Copyright (c) 2024 Advanced Micro Devices, Inc. + * Written by Edgar E. Iglesias + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "qemu/error-report.h" +#include "hw/boards.h" +#include "sysemu/sysemu.h" +#include "hw/xen/arch_hvm.h" +#include +#include "hw/xen/xen-pvh-common.h" + +#define TYPE_XEN_PVH_X86 MACHINE_TYPE_NAME("xenpvh") +OBJECT_DECLARE_SIMPLE_TYPE(XenPVHx86State, XEN_PVH_X86) + +struct XenPVHx86State { + /*< private >*/ + XenPVHMachineState parent; + + DeviceState **cpu; +}; + +static DeviceState *xen_pvh_cpu_new(MachineState *ms, + int64_t apic_id) +{ + Object *cpu = object_new(ms->cpu_type); + + object_property_add_child(OBJECT(ms), "cpu[*]", cpu); + object_property_set_uint(cpu, "apic-id", apic_id, &error_fatal); + qdev_realize(DEVICE(cpu), NULL, &error_fatal); + object_unref(cpu); + + return DEVICE(cpu); +} + +static void xen_pvh_init(MachineState *ms) +{ + XenPVHx86State *xp = XEN_PVH_X86(ms); + int i; + + /* Create dummy cores. This will indirectly create the APIC MSI window. */ + xp->cpu = g_malloc(sizeof xp->cpu[0] * ms->smp.max_cpus); + for (i = 0; i < ms->smp.max_cpus; i++) { + xp->cpu[i] = xen_pvh_cpu_new(ms, i); + } +} + +static void xen_pvh_instance_init(Object *obj) +{ + XenPVHMachineState *s = XEN_PVH_MACHINE(obj); + + /* Default values. */ + s->cfg.ram_low = (MemMapEntry) { 0x0, 0x80000000U }; + s->cfg.ram_high = (MemMapEntry) { 0xC000000000ULL, 0x4000000000ULL }; + s->cfg.pci_intx_irq_base = 16; +} + +/* + * Deliver INTX interrupts to Xen guest. + */ +static void xen_pvh_set_pci_intx_irq(void *opaque, int irq, int level) +{ + /* + * Since QEMU emulates all of the swizziling + * We don't want Xen to do any additional swizzling in + * xen_set_pci_intx_level() so we always set device to 0. + */ + if (xen_set_pci_intx_level(xen_domid, 0, 0, 0, irq, level)) { + error_report("xendevicemodel_set_pci_intx_level failed"); + } +} + +static void xen_pvh_machine_class_init(ObjectClass *oc, void *data) +{ + XenPVHMachineClass *xpc = XEN_PVH_MACHINE_CLASS(oc); + MachineClass *mc = MACHINE_CLASS(oc); + + mc->desc = "Xen PVH x86 machine"; + mc->default_cpu_type = TARGET_DEFAULT_CPU_TYPE; + + /* mc->max_cpus holds the MAX value allowed in the -smp cmd-line opts. */ + mc->max_cpus = HVM_MAX_VCPUS; + + /* We have an implementation specific init to create CPU objects. */ + xpc->init = xen_pvh_init; + + /* + * PCI INTX routing. + * + * We describe the mapping between the 4 INTX interrupt and GSIs + * using xen_set_pci_link_route(). xen_pvh_set_pci_intx_irq is + * used to deliver the interrupt. + */ + xpc->set_pci_intx_irq = xen_pvh_set_pci_intx_irq; + xpc->set_pci_link_route = xen_set_pci_link_route; + + /* List of supported features known to work on PVH x86. */ + xpc->has_pci = true; + + xen_pvh_class_setup_common_props(xpc); +} + +static const TypeInfo xen_pvh_x86_machine_type = { + .name = TYPE_XEN_PVH_X86, + .parent = TYPE_XEN_PVH_MACHINE, + .class_init = xen_pvh_machine_class_init, + .instance_init = xen_pvh_instance_init, + .instance_size = sizeof(XenPVHx86State), +}; + +static void xen_pvh_machine_register_types(void) +{ + type_register_static(&xen_pvh_x86_machine_type); +} + +type_init(xen_pvh_machine_register_types)