From patchwork Fri Oct 18 10:53:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergio Lopez X-Patchwork-Id: 11198221 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7F7511575 for ; Fri, 18 Oct 2019 10:58:51 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5031B20700 for ; Fri, 18 Oct 2019 10:58:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5031B20700 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:37916 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iLPy5-0001Pn-SU for patchwork-qemu-devel@patchwork.kernel.org; Fri, 18 Oct 2019 06:58:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57939) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iLPuu-0006SG-SA for qemu-devel@nongnu.org; Fri, 18 Oct 2019 06:55:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iLPup-00021m-BC for qemu-devel@nongnu.org; Fri, 18 Oct 2019 06:55:32 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59428) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iLPup-00021G-2F for qemu-devel@nongnu.org; Fri, 18 Oct 2019 06:55:27 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6FF7710CC1E3; Fri, 18 Oct 2019 10:55:25 +0000 (UTC) Received: from dritchie.redhat.com (unknown [10.33.36.146]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6194F5D713; Fri, 18 Oct 2019 10:55:12 +0000 (UTC) From: Sergio Lopez To: qemu-devel@nongnu.org Subject: [PATCH v11 14/15] hw/i386: Introduce the microvm machine type Date: Fri, 18 Oct 2019 12:53:14 +0200 Message-Id: <20191018105315.27511-15-slp@redhat.com> In-Reply-To: <20191018105315.27511-1-slp@redhat.com> References: <20191018105315.27511-1-slp@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.65]); Fri, 18 Oct 2019 10:55:25 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: berrange@redhat.com, ehabkost@redhat.com, Sergio Lopez , mst@redhat.com, lersek@redhat.com, groug@kaod.org, marcandre.lureau@gmail.com, kraxel@redhat.com, pbonzini@redhat.com, imammedo@redhat.com, sgarzare@redhat.com, philmd@redhat.com, rth@twiddle.net Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" microvm is a machine type inspired by Firecracker and constructed after its machine model. It's a minimalist machine type without PCI nor ACPI support, designed for short-lived guests. microvm also establishes a baseline for benchmarking and optimizing both QEMU and guest operating systems, since it is optimized for both boot time and footprint. Signed-off-by: Sergio Lopez Reviewed-by: Michael S. Tsirkin --- default-configs/i386-softmmu.mak | 1 + include/hw/i386/microvm.h | 71 ++++ hw/i386/microvm.c | 572 +++++++++++++++++++++++++++++++ hw/i386/Kconfig | 10 + hw/i386/Makefile.objs | 1 + 5 files changed, 655 insertions(+) create mode 100644 include/hw/i386/microvm.h create mode 100644 hw/i386/microvm.c diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak index 4229900f57..4cc64dafa2 100644 --- a/default-configs/i386-softmmu.mak +++ b/default-configs/i386-softmmu.mak @@ -28,3 +28,4 @@ CONFIG_ISAPC=y CONFIG_I440FX=y CONFIG_Q35=y +CONFIG_MICROVM=y diff --git a/include/hw/i386/microvm.h b/include/hw/i386/microvm.h new file mode 100644 index 0000000000..ba68d1f22b --- /dev/null +++ b/include/hw/i386/microvm.h @@ -0,0 +1,71 @@ +/* + * Copyright (c) 2018 Intel Corporation + * Copyright (c) 2019 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 or later, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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 HW_I386_MICROVM_H +#define HW_I386_MICROVM_H + +#include "qemu-common.h" +#include "exec/hwaddr.h" +#include "qemu/notify.h" + +#include "hw/boards.h" +#include "hw/i386/x86.h" + +/* Platform virtio definitions */ +#define VIRTIO_MMIO_BASE 0xc0000000 +#define VIRTIO_IRQ_BASE 5 +#define VIRTIO_NUM_TRANSPORTS 8 +#define VIRTIO_CMDLINE_MAXLEN 64 + +/* Machine type options */ +#define MICROVM_MACHINE_PIT "pit" +#define MICROVM_MACHINE_PIC "pic" +#define MICROVM_MACHINE_RTC "rtc" +#define MICROVM_MACHINE_ISA_SERIAL "isa-serial" +#define MICROVM_MACHINE_OPTION_ROMS "x-option-roms" +#define MICROVM_MACHINE_AUTO_KERNEL_CMDLINE "auto-kernel-cmdline" + +typedef struct { + X86MachineClass parent; + HotplugHandler *(*orig_hotplug_handler)(MachineState *machine, + DeviceState *dev); +} MicrovmMachineClass; + +typedef struct { + X86MachineState parent; + + /* Machine type options */ + OnOffAuto pic; + OnOffAuto pit; + OnOffAuto rtc; + bool isa_serial; + bool option_roms; + bool auto_kernel_cmdline; + + /* Machine state */ + bool kernel_cmdline_fixed; +} MicrovmMachineState; + +#define TYPE_MICROVM_MACHINE MACHINE_TYPE_NAME("microvm") +#define MICROVM_MACHINE(obj) \ + OBJECT_CHECK(MicrovmMachineState, (obj), TYPE_MICROVM_MACHINE) +#define MICROVM_MACHINE_GET_CLASS(obj) \ + OBJECT_GET_CLASS(MicrovmMachineClass, obj, TYPE_MICROVM_MACHINE) +#define MICROVM_MACHINE_CLASS(class) \ + OBJECT_CLASS_CHECK(MicrovmMachineClass, class, TYPE_MICROVM_MACHINE) + +#endif diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c new file mode 100644 index 0000000000..20d2189ea8 --- /dev/null +++ b/hw/i386/microvm.c @@ -0,0 +1,572 @@ +/* + * Copyright (c) 2018 Intel Corporation + * Copyright (c) 2019 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 or later, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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 "qemu/error-report.h" +#include "qemu/cutils.h" +#include "qemu/units.h" +#include "qapi/error.h" +#include "qapi/visitor.h" +#include "qapi/qapi-visit-common.h" +#include "sysemu/sysemu.h" +#include "sysemu/cpus.h" +#include "sysemu/numa.h" +#include "sysemu/reset.h" + +#include "hw/loader.h" +#include "hw/irq.h" +#include "hw/kvm/clock.h" +#include "hw/i386/microvm.h" +#include "hw/i386/x86.h" +#include "hw/i386/pc.h" +#include "target/i386/cpu.h" +#include "hw/timer/i8254.h" +#include "hw/timer/mc146818rtc.h" +#include "hw/char/serial.h" +#include "hw/i386/topology.h" +#include "hw/i386/e820_memory_layout.h" +#include "hw/i386/fw_cfg.h" +#include "hw/virtio/virtio-mmio.h" + +#include "cpu.h" +#include "elf.h" +#include "kvm_i386.h" +#include "hw/xen/start_info.h" + +#define MICROVM_BIOS_FILENAME "bios-microvm.bin" + +static void microvm_set_rtc(MicrovmMachineState *mms, ISADevice *s) +{ + X86MachineState *x86ms = X86_MACHINE(mms); + int val; + + val = MIN(x86ms->below_4g_mem_size / KiB, 640); + rtc_set_memory(s, 0x15, val); + rtc_set_memory(s, 0x16, val >> 8); + /* extended memory (next 64MiB) */ + if (x86ms->below_4g_mem_size > 1 * MiB) { + val = (x86ms->below_4g_mem_size - 1 * MiB) / KiB; + } else { + val = 0; + } + if (val > 65535) { + val = 65535; + } + rtc_set_memory(s, 0x17, val); + rtc_set_memory(s, 0x18, val >> 8); + rtc_set_memory(s, 0x30, val); + rtc_set_memory(s, 0x31, val >> 8); + /* memory between 16MiB and 4GiB */ + if (x86ms->below_4g_mem_size > 16 * MiB) { + val = (x86ms->below_4g_mem_size - 16 * MiB) / (64 * KiB); + } else { + val = 0; + } + if (val > 65535) { + val = 65535; + } + rtc_set_memory(s, 0x34, val); + rtc_set_memory(s, 0x35, val >> 8); + /* memory above 4GiB */ + val = x86ms->above_4g_mem_size / 65536; + rtc_set_memory(s, 0x5b, val); + rtc_set_memory(s, 0x5c, val >> 8); + rtc_set_memory(s, 0x5d, val >> 16); +} + +static void microvm_gsi_handler(void *opaque, int n, int level) +{ + GSIState *s = opaque; + + qemu_set_irq(s->ioapic_irq[n], level); +} + +static void microvm_devices_init(MicrovmMachineState *mms) +{ + X86MachineState *x86ms = X86_MACHINE(mms); + ISABus *isa_bus; + ISADevice *rtc_state; + GSIState *gsi_state; + int i; + + /* Core components */ + + gsi_state = g_malloc0(sizeof(*gsi_state)); + if (mms->pic == ON_OFF_AUTO_ON || mms->pic == ON_OFF_AUTO_AUTO) { + x86ms->gsi = qemu_allocate_irqs(gsi_handler, gsi_state, GSI_NUM_PINS); + } else { + x86ms->gsi = qemu_allocate_irqs(microvm_gsi_handler, + gsi_state, GSI_NUM_PINS); + } + + isa_bus = isa_bus_new(NULL, get_system_memory(), get_system_io(), + &error_abort); + isa_bus_irqs(isa_bus, x86ms->gsi); + + ioapic_init_gsi(gsi_state, "machine"); + + kvmclock_create(); + + for (i = 0; i < VIRTIO_NUM_TRANSPORTS; i++) { + sysbus_create_simple("virtio-mmio", + VIRTIO_MMIO_BASE + i * 512, + x86ms->gsi[VIRTIO_IRQ_BASE + i]); + } + + /* Optional and legacy devices */ + + if (mms->pic == ON_OFF_AUTO_ON || mms->pic == ON_OFF_AUTO_AUTO) { + qemu_irq *i8259; + + i8259 = i8259_init(isa_bus, pc_allocate_cpu_irq()); + for (i = 0; i < ISA_NUM_IRQS; i++) { + gsi_state->i8259_irq[i] = i8259[i]; + } + g_free(i8259); + } + + if (mms->pit == ON_OFF_AUTO_ON || mms->pit == ON_OFF_AUTO_AUTO) { + if (kvm_pit_in_kernel()) { + kvm_pit_init(isa_bus, 0x40); + } else { + i8254_pit_init(isa_bus, 0x40, 0, NULL); + } + } + + if (mms->rtc == ON_OFF_AUTO_ON || + (mms->rtc == ON_OFF_AUTO_AUTO && !kvm_enabled())) { + rtc_state = mc146818_rtc_init(isa_bus, 2000, NULL); + microvm_set_rtc(mms, rtc_state); + } + + if (mms->isa_serial) { + serial_hds_isa_init(isa_bus, 0, 1); + } + + if (bios_name == NULL) { + bios_name = MICROVM_BIOS_FILENAME; + } + x86_bios_rom_init(get_system_memory(), true); +} + +static void microvm_memory_init(MicrovmMachineState *mms) +{ + MachineState *machine = MACHINE(mms); + X86MachineState *x86ms = X86_MACHINE(mms); + MemoryRegion *ram, *ram_below_4g, *ram_above_4g; + MemoryRegion *system_memory = get_system_memory(); + FWCfgState *fw_cfg; + ram_addr_t lowmem; + int i; + + /* + * Check whether RAM fits below 4G (leaving 1/2 GByte for IO memory + * and 256 Mbytes for PCI Express Enhanced Configuration Access Mapping + * also known as MMCFG). + * If it doesn't, we need to split it in chunks below and above 4G. + * In any case, try to make sure that guest addresses aligned at + * 1G boundaries get mapped to host addresses aligned at 1G boundaries. + */ + if (machine->ram_size >= 0xb0000000) { + lowmem = 0x80000000; + } else { + lowmem = 0xb0000000; + } + + /* + * Handle the machine opt max-ram-below-4g. It is basically doing + * min(qemu limit, user limit). + */ + if (!x86ms->max_ram_below_4g) { + x86ms->max_ram_below_4g = 4 * GiB; + } + if (lowmem > x86ms->max_ram_below_4g) { + lowmem = x86ms->max_ram_below_4g; + if (machine->ram_size - lowmem > lowmem && + lowmem & (1 * GiB - 1)) { + warn_report("There is possibly poor performance as the ram size " + " (0x%" PRIx64 ") is more then twice the size of" + " max-ram-below-4g (%"PRIu64") and" + " max-ram-below-4g is not a multiple of 1G.", + (uint64_t)machine->ram_size, x86ms->max_ram_below_4g); + } + } + + if (machine->ram_size > lowmem) { + x86ms->above_4g_mem_size = machine->ram_size - lowmem; + x86ms->below_4g_mem_size = lowmem; + } else { + x86ms->above_4g_mem_size = 0; + x86ms->below_4g_mem_size = machine->ram_size; + } + + ram = g_malloc(sizeof(*ram)); + memory_region_allocate_system_memory(ram, NULL, "microvm.ram", + machine->ram_size); + + ram_below_4g = g_malloc(sizeof(*ram_below_4g)); + memory_region_init_alias(ram_below_4g, NULL, "ram-below-4g", ram, + 0, x86ms->below_4g_mem_size); + memory_region_add_subregion(system_memory, 0, ram_below_4g); + + e820_add_entry(0, x86ms->below_4g_mem_size, E820_RAM); + + if (x86ms->above_4g_mem_size > 0) { + ram_above_4g = g_malloc(sizeof(*ram_above_4g)); + memory_region_init_alias(ram_above_4g, NULL, "ram-above-4g", ram, + x86ms->below_4g_mem_size, + x86ms->above_4g_mem_size); + memory_region_add_subregion(system_memory, 0x100000000ULL, + ram_above_4g); + e820_add_entry(0x100000000ULL, x86ms->above_4g_mem_size, E820_RAM); + } + + fw_cfg = fw_cfg_init_io_dma(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4, + &address_space_memory); + + fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, machine->smp.cpus); + fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, machine->smp.max_cpus); + fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)machine->ram_size); + fw_cfg_add_i32(fw_cfg, FW_CFG_IRQ0_OVERRIDE, kvm_allows_irq0_override()); + fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE, + &e820_reserve, sizeof(e820_reserve)); + fw_cfg_add_file(fw_cfg, "etc/e820", e820_table, + sizeof(struct e820_entry) * e820_get_num_entries()); + + rom_set_fw(fw_cfg); + + if (machine->kernel_filename != NULL) { + x86_load_linux(x86ms, fw_cfg, 0, true, true); + } + + if (mms->option_roms) { + for (i = 0; i < nb_option_roms; i++) { + rom_add_option(option_rom[i].name, option_rom[i].bootindex); + } + } + + x86ms->fw_cfg = fw_cfg; + x86ms->ioapic_as = &address_space_memory; +} + +static gchar *microvm_get_mmio_cmdline(gchar *name) +{ + gchar *cmdline; + gchar *separator; + long int index; + int ret; + + separator = g_strrstr(name, "."); + if (!separator) { + return NULL; + } + + if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) { + return NULL; + } + + cmdline = g_malloc0(VIRTIO_CMDLINE_MAXLEN); + ret = g_snprintf(cmdline, VIRTIO_CMDLINE_MAXLEN, + " virtio_mmio.device=512@0x%lx:%ld", + VIRTIO_MMIO_BASE + index * 512, + VIRTIO_IRQ_BASE + index); + if (ret < 0 || ret >= VIRTIO_CMDLINE_MAXLEN) { + g_free(cmdline); + return NULL; + } + + return cmdline; +} + +static void microvm_fix_kernel_cmdline(MachineState *machine) +{ + X86MachineState *x86ms = X86_MACHINE(machine); + BusState *bus; + BusChild *kid; + char *cmdline; + + /* + * Find MMIO transports with attached devices, and add them to the kernel + * command line. + * + * Yes, this is a hack, but one that heavily improves the UX without + * introducing any significant issues. + */ + cmdline = g_strdup(machine->kernel_cmdline); + bus = sysbus_get_default(); + QTAILQ_FOREACH(kid, &bus->children, sibling) { + DeviceState *dev = kid->child; + ObjectClass *class = object_get_class(OBJECT(dev)); + + if (class == object_class_by_name(TYPE_VIRTIO_MMIO)) { + VirtIOMMIOProxy *mmio = VIRTIO_MMIO(OBJECT(dev)); + VirtioBusState *mmio_virtio_bus = &mmio->bus; + BusState *mmio_bus = &mmio_virtio_bus->parent_obj; + + if (!QTAILQ_EMPTY(&mmio_bus->children)) { + gchar *mmio_cmdline = microvm_get_mmio_cmdline(mmio_bus->name); + if (mmio_cmdline) { + char *newcmd = g_strjoin(NULL, cmdline, mmio_cmdline, NULL); + g_free(mmio_cmdline); + g_free(cmdline); + cmdline = newcmd; + } + } + } + } + + fw_cfg_modify_i32(x86ms->fw_cfg, FW_CFG_CMDLINE_SIZE, strlen(cmdline) + 1); + fw_cfg_modify_string(x86ms->fw_cfg, FW_CFG_CMDLINE_DATA, cmdline); +} + +static void microvm_machine_state_init(MachineState *machine) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(machine); + X86MachineState *x86ms = X86_MACHINE(machine); + Error *local_err = NULL; + + microvm_memory_init(mms); + + x86_cpus_init(x86ms, CPU_VERSION_LATEST); + if (local_err) { + error_report_err(local_err); + exit(1); + } + + microvm_devices_init(mms); +} + +static void microvm_machine_reset(MachineState *machine) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(machine); + CPUState *cs; + X86CPU *cpu; + + if (machine->kernel_filename != NULL && + mms->auto_kernel_cmdline && !mms->kernel_cmdline_fixed) { + microvm_fix_kernel_cmdline(machine); + mms->kernel_cmdline_fixed = true; + } + + qemu_devices_reset(); + + CPU_FOREACH(cs) { + cpu = X86_CPU(cs); + + if (cpu->apic_state) { + device_reset(cpu->apic_state); + } + } +} + +static void microvm_machine_get_pic(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + OnOffAuto pic = mms->pic; + + visit_type_OnOffAuto(v, name, &pic, errp); +} + +static void microvm_machine_set_pic(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + + visit_type_OnOffAuto(v, name, &mms->pic, errp); +} + +static void microvm_machine_get_pit(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + OnOffAuto pit = mms->pit; + + visit_type_OnOffAuto(v, name, &pit, errp); +} + +static void microvm_machine_set_pit(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + + visit_type_OnOffAuto(v, name, &mms->pit, errp); +} + +static void microvm_machine_get_rtc(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + OnOffAuto rtc = mms->rtc; + + visit_type_OnOffAuto(v, name, &rtc, errp); +} + +static void microvm_machine_set_rtc(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + + visit_type_OnOffAuto(v, name, &mms->rtc, errp); +} + +static bool microvm_machine_get_isa_serial(Object *obj, Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + + return mms->isa_serial; +} + +static void microvm_machine_set_isa_serial(Object *obj, bool value, + Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + + mms->isa_serial = value; +} + +static bool microvm_machine_get_option_roms(Object *obj, Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + + return mms->option_roms; +} + +static void microvm_machine_set_option_roms(Object *obj, bool value, + Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + + mms->option_roms = value; +} + +static bool microvm_machine_get_auto_kernel_cmdline(Object *obj, Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + + return mms->auto_kernel_cmdline; +} + +static void microvm_machine_set_auto_kernel_cmdline(Object *obj, bool value, + Error **errp) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + + mms->auto_kernel_cmdline = value; +} + +static void microvm_machine_initfn(Object *obj) +{ + MicrovmMachineState *mms = MICROVM_MACHINE(obj); + + /* Configuration */ + mms->pic = ON_OFF_AUTO_AUTO; + mms->pit = ON_OFF_AUTO_AUTO; + mms->rtc = ON_OFF_AUTO_AUTO; + mms->isa_serial = true; + mms->option_roms = true; + mms->auto_kernel_cmdline = true; + + /* State */ + mms->kernel_cmdline_fixed = false; +} + +static void microvm_class_init(ObjectClass *oc, void *data) +{ + MachineClass *mc = MACHINE_CLASS(oc); + + mc->init = microvm_machine_state_init; + + mc->family = "microvm_i386"; + mc->desc = "microvm (i386)"; + mc->units_per_default_bus = 1; + mc->no_floppy = 1; + mc->max_cpus = 288; + mc->has_hotpluggable_cpus = false; + mc->auto_enable_numa_with_memhp = false; + mc->default_cpu_type = TARGET_DEFAULT_CPU_TYPE; + mc->nvdimm_supported = false; + + /* Avoid relying too much on kernel components */ + mc->default_kernel_irqchip_split = true; + + /* Machine class handlers */ + mc->reset = microvm_machine_reset; + + object_class_property_add(oc, MICROVM_MACHINE_PIC, "OnOffAuto", + microvm_machine_get_pic, + microvm_machine_set_pic, + NULL, NULL, &error_abort); + object_class_property_set_description(oc, MICROVM_MACHINE_PIC, + "Enable i8259 PIC", &error_abort); + + object_class_property_add(oc, MICROVM_MACHINE_PIT, "OnOffAuto", + microvm_machine_get_pit, + microvm_machine_set_pit, + NULL, NULL, &error_abort); + object_class_property_set_description(oc, MICROVM_MACHINE_PIT, + "Enable i8254 PIT", &error_abort); + + object_class_property_add(oc, MICROVM_MACHINE_RTC, "OnOffAuto", + microvm_machine_get_rtc, + microvm_machine_set_rtc, + NULL, NULL, &error_abort); + object_class_property_set_description(oc, MICROVM_MACHINE_RTC, + "Enable MC146818 RTC", &error_abort); + + object_class_property_add_bool(oc, MICROVM_MACHINE_ISA_SERIAL, + microvm_machine_get_isa_serial, + microvm_machine_set_isa_serial, + &error_abort); + object_class_property_set_description(oc, MICROVM_MACHINE_ISA_SERIAL, + "Set off to disable the instantiation an ISA serial port", + &error_abort); + + object_class_property_add_bool(oc, MICROVM_MACHINE_OPTION_ROMS, + microvm_machine_get_option_roms, + microvm_machine_set_option_roms, + &error_abort); + object_class_property_set_description(oc, MICROVM_MACHINE_OPTION_ROMS, + "Set off to disable loading option ROMs", &error_abort); + + object_class_property_add_bool(oc, MICROVM_MACHINE_AUTO_KERNEL_CMDLINE, + microvm_machine_get_auto_kernel_cmdline, + microvm_machine_set_auto_kernel_cmdline, + &error_abort); + object_class_property_set_description(oc, + MICROVM_MACHINE_AUTO_KERNEL_CMDLINE, + "Set off to disable adding virtio-mmio devices to the kernel cmdline", + &error_abort); +} + +static const TypeInfo microvm_machine_info = { + .name = TYPE_MICROVM_MACHINE, + .parent = TYPE_X86_MACHINE, + .instance_size = sizeof(MicrovmMachineState), + .instance_init = microvm_machine_initfn, + .class_size = sizeof(MicrovmMachineClass), + .class_init = microvm_class_init, + .interfaces = (InterfaceInfo[]) { + { } + }, +}; + +static void microvm_machine_init(void) +{ + type_register_static(µvm_machine_info); +} +type_init(microvm_machine_init); diff --git a/hw/i386/Kconfig b/hw/i386/Kconfig index c5c9d4900e..b25bb6d78a 100644 --- a/hw/i386/Kconfig +++ b/hw/i386/Kconfig @@ -92,6 +92,16 @@ config Q35 select SMBIOS select FW_CFG_DMA +config MICROVM + bool + imply SERIAL_ISA + select ISA_BUS + select APIC + select IOAPIC + select I8259 + select MC146818RTC + select VIRTIO_MMIO + config VTD bool diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs index 7ed80a4853..0d195b5210 100644 --- a/hw/i386/Makefile.objs +++ b/hw/i386/Makefile.objs @@ -4,6 +4,7 @@ obj-y += x86.o obj-y += pc.o obj-$(CONFIG_I440FX) += pc_piix.o obj-$(CONFIG_Q35) += pc_q35.o +obj-$(CONFIG_MICROVM) += microvm.o obj-y += fw_cfg.o pc_sysfw.o obj-y += x86-iommu.o obj-$(CONFIG_VTD) += intel_iommu.o