| Message ID | 1604636510-8347-6-git-send-email-chenhc@lemote.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mips: Add Loongson-3 machine support | expand |
Hi Huacai, On 11/6/20 5:21 AM, Huacai Chen wrote: > Add Loongson-3 based machine support, it use liointc as the interrupt > controler and use GPEX as the pci controller. Currently it can work with > both TCG and KVM. > > As the machine model is not based on any exiting physical hardware, the > name of the machine is "loongson3-virt". It may be superseded in future > by a real machine model. If this happens, then a regular deprecation > procedure shall occur for "loongson3-virt" machine. > > We now already have a full functional Linux kernel (based on Linux-5.4.x > LTS) here: > > https://github.com/chenhuacai/linux > > Of course the upstream kernel is also usable (the kvm host side and > guest side have both been upstream in Linux-5.9): > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > How to use QEMU/Loongson-3? > 1, Download kernel source from the above URL; > 2, Build a kernel with arch/mips/configs/loongson3_defconfig; > 3, Boot a Loongson-3A4000 host with this kernel (for KVM mode); > 4, Build QEMU-master with this patchset; > 5, modprobe kvm (only necessary for KVM mode); > 6, Use QEMU with TCG: > qemu-system-mips64el -M loongson3-virt,accel=tcg -cpu Loongson-3A1000 -kernel <path_to_kernel> -append ... > Use QEMU with KVM: > qemu-system-mips64el -M loongson3-virt,accel=kvm -cpu Loongson-3A4000 -kernel <path_to_kernel> -append ... > > The "-cpu" parameter is optional here and QEMU will use the correct type for TCG/KVM automatically. > > Signed-off-by: Huacai Chen <chenhc@lemote.com> > Co-developed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> > --- > default-configs/devices/mips64el-softmmu.mak | 1 + > hw/mips/Kconfig | 12 + > hw/mips/loongson3_virt.c | 614 +++++++++++++++++++++++++++ > hw/mips/meson.build | 2 +- > 4 files changed, 628 insertions(+), 1 deletion(-) > create mode 100644 hw/mips/loongson3_virt.c > > diff --git a/default-configs/devices/mips64el-softmmu.mak b/default-configs/devices/mips64el-softmmu.mak > index 9f8a3ef..26c660a 100644 > --- a/default-configs/devices/mips64el-softmmu.mak > +++ b/default-configs/devices/mips64el-softmmu.mak > @@ -3,6 +3,7 @@ > include mips-softmmu-common.mak > CONFIG_IDE_VIA=y > CONFIG_FULOONG=y > +CONFIG_LOONGSON3V=y > CONFIG_ATI_VGA=y > CONFIG_RTL8139_PCI=y > CONFIG_JAZZ=y > diff --git a/hw/mips/Kconfig b/hw/mips/Kconfig > index 8be7012..ef5cee1 100644 > --- a/hw/mips/Kconfig > +++ b/hw/mips/Kconfig > @@ -32,6 +32,18 @@ config FULOONG > bool > select PCI_BONITO > > +config LOONGSON3V > + bool > + select PCKBD Is it used? I only see USB. > + select SERIAL > + select GOLDFISH_RTC > + select LOONGSON_LIOINTC > + select PCI_DEVICES > + select PCI_EXPRESS_GENERIC_BRIDGE > + select VIRTIO_VGA > + select QXL if SPICE I don't understand the UI dependencies, as we should be able to start this machine without UI (just console for example). Maybe you want the 'imply' keyword instead? > + select MSI_NONBROKEN > + > config MIPS_CPS > bool > select PTIMER > diff --git a/hw/mips/loongson3_virt.c b/hw/mips/loongson3_virt.c > new file mode 100644 > index 0000000..c5db2db > --- /dev/null > +++ b/hw/mips/loongson3_virt.c > @@ -0,0 +1,614 @@ > +/* > + * Generic Loongson-3 Platform support > + * > + * Copyright (c) 2018-2020 Huacai Chen (chenhc@lemote.com) > + * Copyright (c) 2018-2020 Jiaxun Yang <jiaxun.yang@flygoat.com> > + * > + * 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 <https://www.gnu.org/licenses/>. > + */ > + > +/* > + * Generic virtualized PC Platform based on Loongson-3 CPU (MIPS64R2 with > + * extensions, 800~2000MHz) > + */ > + > +#include "qemu/osdep.h" > +#include "qemu-common.h" > +#include "qemu/units.h" > +#include "qemu/cutils.h" > +#include "qapi/error.h" > +#include "cpu.h" > +#include "elf.h" > +#include "kvm_mips.h" > +#include "hw/boards.h" > +#include "hw/char/serial.h" > +#include "hw/intc/loongson_liointc.h" > +#include "hw/mips/mips.h" > +#include "hw/mips/cpudevs.h" > +#include "hw/mips/fw_cfg.h" > +#include "hw/mips/loongson3_bootp.h" > +#include "hw/misc/unimp.h" > +#include "hw/intc/i8259.h" > +#include "hw/loader.h" > +#include "hw/isa/superio.h" > +#include "hw/pci/msi.h" > +#include "hw/pci/pci.h" > +#include "hw/pci/pci_host.h" > +#include "hw/pci-host/gpex.h" > +#include "hw/usb.h" > +#include "net/net.h" > +#include "exec/address-spaces.h" > +#include "sysemu/kvm.h" > +#include "sysemu/qtest.h" > +#include "sysemu/reset.h" > +#include "sysemu/runstate.h" > +#include "qemu/log.h" > +#include "qemu/error-report.h" > + > +#define PM_CNTL_MODE 0x10 > + > +#define LOONGSON_MAX_VCPUS 16 > + > +/* > + * Loongson-3's virtual machine BIOS can be obtained here: > + * 1, https://github.com/loongson-community/firmware-nonfree > + * 2, http://dev.lemote.com:8000/files/firmware/UEFI/KVM/bios_loongson3.bin > + */ > +#define LOONGSON3_BIOSNAME "bios_loongson3.bin" > + > +#define UART_IRQ 0 > +#define RTC_IRQ 1 > +#define PCIE_IRQ_BASE 2 > + > +const struct MemmapEntry virt_memmap[] = { > + [VIRT_LOWMEM] = { 0x00000000, 0x10000000 }, > + [VIRT_PM] = { 0x10080000, 0x100 }, > + [VIRT_FW_CFG] = { 0x10080100, 0x100 }, > + [VIRT_RTC] = { 0x10081000, 0x1000 }, > + [VIRT_PCIE_PIO] = { 0x18000000, 0x80000 }, > + [VIRT_PCIE_ECAM] = { 0x1a000000, 0x2000000 }, > + [VIRT_BIOS_ROM] = { 0x1fc00000, 0x200000 }, > + [VIRT_UART] = { 0x1fe001e0, 0x8 }, > + [VIRT_LIOINTC] = { 0x3ff01400, 0x64 }, > + [VIRT_PCIE_MMIO] = { 0x40000000, 0x40000000 }, > + [VIRT_HIGHMEM] = { 0x80000000, 0x0 }, /* Variable */ > +}; > + > +static const struct MemmapEntry loader_memmap[] = { > + [LOADER_KERNEL] = { 0x00000000, 0x4000000 }, > + [LOADER_INITRD] = { 0x04000000, 0x0 }, /* Variable */ > + [LOADER_CMDLINE] = { 0x0ff00000, 0x100000 }, > +}; > + > +static const struct MemmapEntry loader_rommap[] = { > + [LOADER_BOOTROM] = { 0x1fc00000, 0x1000 }, > + [LOADER_PARAM] = { 0x1fc01000, 0x10000 }, > +}; > + > +static struct _loaderparams { > + uint64_t cpu_freq; > + uint64_t ram_size; > + const char *kernel_cmdline; > + const char *kernel_filename; > + const char *initrd_filename; > + uint64_t kernel_entry; > + uint64_t a0, a1, a2; > +} loaderparams; > + > +static uint64_t loongson3_pm_read(void *opaque, hwaddr addr, unsigned size) > +{ > + return 0; > +} > + > +static void loongson3_pm_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) > +{ > + if (addr != PM_CNTL_MODE) { > + return; > + } > + > + switch (val) { > + case 0x00: > + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); > + return; > + case 0xff: > + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); > + return; > + default: > + return; > + } > +} > + > +static const MemoryRegionOps loongson3_pm_ops = { > + .read = loongson3_pm_read, > + .write = loongson3_pm_write, Any access size is OK? (from your ASM it is byte accessed). > + .endianness = DEVICE_NATIVE_ENDIAN, > +}; > + > +#define DEF_LOONGSON3_FREQ (800 * 1000 * 1000) > + > +static uint64_t get_cpu_freq_hz(void) > +{ > +#ifdef CONFIG_KVM > + int ret; > + uint64_t freq; > + struct kvm_one_reg freq_reg = { > + .id = KVM_REG_MIPS_COUNT_HZ, > + .addr = (uintptr_t)(&freq) > + }; > + > + if (kvm_enabled()) { > + ret = kvm_vcpu_ioctl(first_cpu, KVM_GET_ONE_REG, &freq_reg); > + if (ret >= 0) { > + return freq * 2; > + } > + } > +#endif > + return DEF_LOONGSON3_FREQ; > +} > + > +static void init_boot_param(void) > +{ > + void *p; > + struct boot_params *bp; > + > + p = g_malloc0(loader_rommap[LOADER_PARAM].size); I'm worried Coverity complains we are leaking this. Maybe keep it static? [updated, see MachineState comment below] > + bp = p; > + > + stw_le_p(&bp->efi.smbios.vers, 1); > + init_reset_system(&(bp->reset_system)); > + p += ROUND_UP(sizeof(struct boot_params), 64); > + init_loongson_params(&(bp->efi.smbios.lp), p, > + loaderparams.cpu_freq, loaderparams.ram_size); > + > + rom_add_blob_fixed("params_rom", bp, > + loader_rommap[LOADER_PARAM].size, > + loader_rommap[LOADER_PARAM].base); > + > + g_free(bp); > + > + loaderparams.a2 = cpu_mips_phys_to_kseg0(NULL, loader_rommap[LOADER_PARAM].base); > +} > + > +static void init_boot_rom(void) > +{ > + const unsigned int boot_code[] = { > + 0x40086000, /* mfc0 t0, CP0_STATUS */ > + 0x240900E4, /* li t1, 0xe4 #set kx, sx, ux, erl */ > + 0x01094025, /* or t0, t0, t1 */ > + 0x3C090040, /* lui t1, 0x40 #set bev */ > + 0x01094025, /* or t0, t0, t1 */ > + 0x40886000, /* mtc0 t0, CP0_STATUS */ > + 0x00000000, > + 0x40806800, /* mtc0 zero, CP0_CAUSE */ > + 0x00000000, > + 0x400A7801, /* mfc0 t2, $15, 1 */ > + 0x314A00FF, /* andi t2, 0x0ff */ > + 0x3C089000, /* dli t0, 0x900000003ff01000 */ > + 0x00084438, > + 0x35083FF0, > + 0x00084438, > + 0x35081000, > + 0x314B0003, /* andi t3, t2, 0x3 #local cpuid */ > + 0x000B5A00, /* sll t3, 8 */ > + 0x010B4025, /* or t0, t0, t3 */ > + 0x314C000C, /* andi t4, t2, 0xc #node id */ > + 0x000C62BC, /* dsll t4, 42 */ > + 0x010C4025, /* or t0, t0, t4 */ > + /* WaitForInit: */ > + 0xDD020020, /* ld v0, FN_OFF(t0) #FN_OFF 0x020 */ > + 0x1040FFFE, /* beqz v0, WaitForInit */ > + 0x00000000, /* nop */ > + 0xDD1D0028, /* ld sp, SP_OFF(t0) #FN_OFF 0x028 */ > + 0xDD1C0030, /* ld gp, GP_OFF(t0) #FN_OFF 0x030 */ > + 0xDD050038, /* ld a1, A1_OFF(t0) #FN_OFF 0x038 */ > + 0x00400008, /* jr v0 #byebye */ > + 0x00000000, /* nop */ > + 0x1000FFFF, /* 1: b 1b */ > + 0x00000000, /* nop */ > + > + /* Reset */ > + 0x3C0C9000, /* dli t0, 0x9000000010080010 */ > + 0x358C0000, > + 0x000C6438, > + 0x358C1008, > + 0x000C6438, > + 0x358C0010, > + 0x240D0000, /* li t1, 0x00 */ > + 0xA18D0000, /* sb t1, (t0) */ > + 0x1000FFFF, /* 1: b 1b */ > + 0x00000000, /* nop */ > + > + /* Shutdown */ > + 0x3C0C9000, /* dli t0, 0x9000000010080010 */ > + 0x358C0000, > + 0x000C6438, > + 0x358C1008, > + 0x000C6438, > + 0x358C0010, > + 0x240D00FF, /* li t1, 0xff */ > + 0xA18D0000, /* sb t1, (t0) */ > + 0x1000FFFF, /* 1: b 1b */ > + 0x00000000 /* nop */ > + }; > + > + rom_add_blob_fixed("boot_rom", boot_code, sizeof(boot_code), > + loader_rommap[LOADER_BOOTROM].base); > +} > + > +static void fw_cfg_boot_set(void *opaque, const char *boot_device, > + Error **errp) > +{ > + fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]); > +} > + > +static void fw_conf_init(unsigned long ram_size) > +{ > + FWCfgState *fw_cfg; > + hwaddr cfg_addr = virt_memmap[VIRT_FW_CFG].base; > + > + fw_cfg = fw_cfg_init_mem_wide(cfg_addr, cfg_addr + 8, 8, 0, NULL); > + fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, (uint16_t)current_machine->smp.cpus); > + fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)current_machine->smp.max_cpus); > + fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size); > + fw_cfg_add_i32(fw_cfg, FW_CFG_MACHINE_VERSION, 1); > + fw_cfg_add_i64(fw_cfg, FW_CFG_CPU_FREQ, get_cpu_freq_hz()); > + qemu_register_boot_set(fw_cfg_boot_set, fw_cfg); > +} > + > +static int set_prom_cmdline(ram_addr_t initrd_offset, long initrd_size) > +{ > + hwaddr cmdline_vaddr; > + char memenv[32]; > + char highmemenv[32]; > + void *cmdline_buf; > + unsigned int *parg_env; > + int ret = 0; > + > + /* Allocate cmdline_buf for command line. */ > + cmdline_buf = g_malloc0(loader_memmap[LOADER_CMDLINE].size); > + cmdline_vaddr = cpu_mips_phys_to_kseg0(NULL, > + loader_memmap[LOADER_CMDLINE].base); > + > + /* > + * Layout of cmdline_buf looks like this: > + * argv[0], argv[1], 0, env[0], env[1], ... env[i], 0, > + * argv[0]'s data, argv[1]'s data, env[0]'data, ..., env[i]'s data, 0 > + */ > + parg_env = (void *)cmdline_buf; > + > + ret = (3 + 1) * 4; > + *parg_env++ = cmdline_vaddr + ret; > + ret += (1 + snprintf(cmdline_buf + ret, 256 - ret, "g")); > + > + /* argv1 */ > + *parg_env++ = cmdline_vaddr + ret; > + if (initrd_size > 0) > + ret += (1 + snprintf(cmdline_buf + ret, 256 - ret, > + "rd_start=0x" TARGET_FMT_lx " rd_size=%li %s", > + cpu_mips_phys_to_kseg0(NULL, initrd_offset), > + initrd_size, loaderparams.kernel_cmdline)); > + else > + ret += (1 + snprintf(cmdline_buf + ret, 256 - ret, "%s", > + loaderparams.kernel_cmdline)); > + > + /* argv2 */ > + *parg_env++ = cmdline_vaddr + 4 * ret; > + > + /* env */ > + sprintf(memenv, "%d", 256); Where is that used? This could be const... > + sprintf(highmemenv, "%ld", (unsigned long)(loaderparams.ram_size / MiB) - 256); Where is that used? Anyhow, if needed, please use g_strdup_printf(). > + > + rom_add_blob_fixed("cmdline", cmdline_buf, > + loader_memmap[LOADER_CMDLINE].size, > + loader_memmap[LOADER_CMDLINE].base); > + > + g_free(cmdline_buf); > + > + loaderparams.a0 = 2; > + loaderparams.a1 = cmdline_vaddr; > + > + return 0; > +} > + > +static uint64_t load_kernel(CPUMIPSState *env) > +{ > + long kernel_size; > + ram_addr_t initrd_offset; > + uint64_t kernel_entry, kernel_low, kernel_high, initrd_size; > + > + kernel_size = load_elf(loaderparams.kernel_filename, NULL, > + cpu_mips_kseg0_to_phys, NULL, > + (uint64_t *)&kernel_entry, > + (uint64_t *)&kernel_low, (uint64_t *)&kernel_high, > + NULL, 0, EM_MIPS, 1, 0); > + if (kernel_size < 0) { > + error_report("could not load kernel '%s': %s", > + loaderparams.kernel_filename, > + load_elf_strerror(kernel_size)); > + exit(1); > + } > + > + /* load initrd */ > + initrd_size = 0; > + initrd_offset = 0; > + if (loaderparams.initrd_filename) { > + initrd_size = get_image_size(loaderparams.initrd_filename); > + if (initrd_size > 0) { > + initrd_offset = MAX(loader_memmap[LOADER_INITRD].base, > + ROUND_UP(kernel_high, INITRD_PAGE_SIZE)); > + > + if (initrd_offset + initrd_size > ram_size) { > + error_report("memory too small for initial ram disk '%s'", > + loaderparams.initrd_filename); > + exit(1); > + } > + > + initrd_size = load_image_targphys(loaderparams.initrd_filename, > + initrd_offset, > + ram_size - initrd_offset); > + } > + > + if (initrd_size == (target_ulong) -1) { > + error_report("could not load initial ram disk '%s'", > + loaderparams.initrd_filename); > + exit(1); > + } > + } > + > + /* Setup prom cmdline. */ > + set_prom_cmdline(initrd_offset, initrd_size); > + > + return kernel_entry; > +} > + > +static void main_cpu_reset(void *opaque) > +{ > + MIPSCPU *cpu = opaque; > + CPUMIPSState *env = &cpu->env; > + > + cpu_reset(CPU(cpu)); > + > + /* Loongson-3 reset stuff */ > + if (loaderparams.kernel_filename) { > + if (cpu == MIPS_CPU(first_cpu)) { > + env->active_tc.gpr[4] = loaderparams.a0; > + env->active_tc.gpr[5] = loaderparams.a1; > + env->active_tc.gpr[6] = loaderparams.a2; > + env->active_tc.PC = loaderparams.kernel_entry; > + } > + env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL)); > + } > +} > + > +static inline void loongson3_virt_devices_init(MachineState *machine, DeviceState *pic) > +{ > + int i; > + qemu_irq irq; > + PCIBus *pci_bus; > + DeviceState *dev; > + MemoryRegion *pio_alias; > + MemoryRegion *mmio_alias, *mmio_reg; > + MemoryRegion *ecam_alias, *ecam_reg; > + > + dev = qdev_new(TYPE_GPEX_HOST); > + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); > + pci_bus = PCI_HOST_BRIDGE(dev)->bus; > + > + ecam_alias = g_new0(MemoryRegion, 1); Again, Coverity will complain for the memory leaked :( I think you want to keep all these pointers in an object extending MachineState. You can check at RaspiMachineState for an example. > + ecam_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0); > + memory_region_init_alias(ecam_alias, OBJECT(dev), "pcie-ecam", > + ecam_reg, 0, virt_memmap[VIRT_PCIE_ECAM].size); > + memory_region_add_subregion(get_system_memory(), > + virt_memmap[VIRT_PCIE_ECAM].base, ecam_alias); > + > + mmio_alias = g_new0(MemoryRegion, 1); > + mmio_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 1); > + memory_region_init_alias(mmio_alias, OBJECT(dev), "pcie-mmio", > + mmio_reg, virt_memmap[VIRT_PCIE_MMIO].base, > + virt_memmap[VIRT_PCIE_MMIO].size); > + memory_region_add_subregion(get_system_memory(), > + virt_memmap[VIRT_PCIE_MMIO].base, mmio_alias); > + > + pio_alias = g_new0(MemoryRegion, 1); > + memory_region_init_alias(pio_alias, OBJECT(dev), "pcie-pio", > + get_system_io(), 0, virt_memmap[VIRT_PCIE_PIO].size); > + memory_region_add_subregion(get_system_memory(), > + virt_memmap[VIRT_PCIE_PIO].base, pio_alias); > + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 2, virt_memmap[VIRT_PCIE_PIO].base); > + > + for (i = 0; i < GPEX_NUM_IRQS; i++) { > + irq = qdev_get_gpio_in(pic, PCIE_IRQ_BASE + i); > + sysbus_connect_irq(SYS_BUS_DEVICE(dev), i, irq); > + gpex_set_irq_num(GPEX_HOST(dev), i, PCIE_IRQ_BASE + i); > + } Maybe set here "msi_nonbroken = true;". > + > + pci_vga_init(pci_bus); Maybe part of defaults_enabled... not sure although. > + > + if (defaults_enabled()) { > + pci_create_simple(pci_bus, -1, "pci-ohci"); > + usb_create_simple(usb_bus_find(-1), "usb-kbd"); > + usb_create_simple(usb_bus_find(-1), "usb-tablet"); > + } > + > + for (i = 0; i < nb_nics; i++) { > + NICInfo *nd = &nd_table[i]; > + > + if (!nd->model) { > + nd->model = g_strdup("virtio"); > + } > + > + pci_nic_init_nofail(nd, pci_bus, nd->model, NULL); > + } > +} > + > +static void mips_loongson3_virt_init(MachineState *machine) > +{ > + int i; > + long bios_size; > + MIPSCPU *cpu; > + Clock *cpuclk; > + CPUMIPSState *env; > + DeviceState *liointc; > + char *filename; > + const char *kernel_cmdline = machine->kernel_cmdline; > + const char *kernel_filename = machine->kernel_filename; > + const char *initrd_filename = machine->initrd_filename; > + ram_addr_t ram_size = machine->ram_size; > + MemoryRegion *address_space_mem = get_system_memory(); > + MemoryRegion *ram = g_new(MemoryRegion, 1); > + MemoryRegion *bios = g_new(MemoryRegion, 1); > + MemoryRegion *iomem = g_new(MemoryRegion, 1); > + > + /* TODO: TCG will support all CPU types */ > + if (!kvm_enabled()) { > + if (!machine->cpu_type) { > + machine->cpu_type = MIPS_CPU_TYPE_NAME("Loongson-3A1000"); > + } > + if (!strstr(machine->cpu_type, "Loongson-3A1000")) { > + error_report("Loongson-3/TCG needs cpu type Loongson-3A1000"); Why not accept any 3A family? > + exit(1); > + } > + } else { > + if (!machine->cpu_type) { > + machine->cpu_type = MIPS_CPU_TYPE_NAME("Loongson-3A4000"); > + } > + if (!strstr(machine->cpu_type, "Loongson-3A4000")) { > + error_report("Loongson-3/KVM needs cpu type Loongson-3A4000"); > + exit(1); > + } > + } > + > + if (ram_size < 512 * MiB) { > + error_report("Loongson-3 machine needs at least 512MB memory"); > + exit(1); > + } > + > + /* > + * The whole MMIO range among configure registers doesn't generate > + * exception when accessing invalid memory. Create some unimplememted > + * devices to emulate this feature. > + */ > + create_unimplemented_device("mmio fallback 0", 0x10000000, 256 * MiB); > + create_unimplemented_device("mmio fallback 1", 0x30000000, 256 * MiB); > + > + liointc = qdev_new("loongson.liointc"); > + sysbus_realize_and_unref(SYS_BUS_DEVICE(liointc), &error_fatal); > + > + sysbus_mmio_map(SYS_BUS_DEVICE(liointc), 0, virt_memmap[VIRT_LIOINTC].base); > + > + serial_mm_init(address_space_mem, virt_memmap[VIRT_UART].base, 0, > + qdev_get_gpio_in(liointc, UART_IRQ), 115200, serial_hd(0), > + DEVICE_NATIVE_ENDIAN); > + > + sysbus_create_simple("goldfish_rtc", virt_memmap[VIRT_RTC].base, > + qdev_get_gpio_in(liointc, RTC_IRQ)); > + > + cpuclk = clock_new(OBJECT(machine), "cpu-refclk"); > + clock_set_hz(cpuclk, DEF_LOONGSON3_FREQ); > + > + for (i = 0; i < machine->smp.cpus; i++) { > + int ip; > + > + /* init CPUs */ > + cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk); > + > + /* Init internal devices */ > + cpu_mips_irq_init_cpu(cpu); > + cpu_mips_clock_init(cpu); > + qemu_register_reset(main_cpu_reset, cpu); > + > + if (i >= 4) { > + continue; /* Only node-0 can be connected to LIOINTC */ > + } > + > + for (ip = 0; ip < 4 ; ip++) { > + int pin = i * 4 + ip; > + sysbus_connect_irq(SYS_BUS_DEVICE(liointc), > + pin, cpu->env.irq[ip + 2]); > + } > + } > + env = &MIPS_CPU(first_cpu)->env; > + > + /* Allocate RAM/BIOS, 0x00000000~0x10000000 is alias of 0x80000000~0x90000000 */ > + memory_region_init_rom(bios, NULL, "loongson3.bios", > + virt_memmap[VIRT_BIOS_ROM].size, &error_fatal); > + memory_region_init_alias(ram, NULL, "loongson3.lowmem", > + machine->ram, 0, virt_memmap[VIRT_LOWMEM].size); > + memory_region_init_io(iomem, NULL, &loongson3_pm_ops, > + NULL, "loongson3_pm", virt_memmap[VIRT_PM].size); > + > + memory_region_add_subregion(address_space_mem, > + virt_memmap[VIRT_LOWMEM].base, ram); > + memory_region_add_subregion(address_space_mem, > + virt_memmap[VIRT_BIOS_ROM].base, bios); > + memory_region_add_subregion(address_space_mem, > + virt_memmap[VIRT_HIGHMEM].base, machine->ram); > + memory_region_add_subregion(address_space_mem, > + virt_memmap[VIRT_PM].base, iomem); > + > + /* > + * We do not support flash operation, just loading bios.bin as raw BIOS. > + * Please use -L to set the BIOS path and -bios to set bios name. > + */ > + > + if (kernel_filename) { > + loaderparams.cpu_freq = get_cpu_freq_hz(); > + loaderparams.ram_size = ram_size; > + loaderparams.kernel_filename = kernel_filename; > + loaderparams.kernel_cmdline = kernel_cmdline; > + loaderparams.initrd_filename = initrd_filename; > + loaderparams.kernel_entry = load_kernel(env); > + > + init_boot_rom(); > + init_boot_param(); > + } else { > + if (bios_name == NULL) { > + bios_name = LOONGSON3_BIOSNAME; > + } > + filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); > + if (filename) { > + bios_size = load_image_targphys(filename, > + virt_memmap[VIRT_BIOS_ROM].base, > + virt_memmap[VIRT_BIOS_ROM].size); > + g_free(filename); > + } else { > + bios_size = -1; > + } > + > + if ((bios_size < 0 || bios_size > virt_memmap[VIRT_BIOS_ROM].size) && > + !kernel_filename && !qtest_enabled()) { > + error_report("Could not load MIPS bios '%s'", bios_name); > + exit(1); > + } > + > + fw_conf_init(ram_size); > + } > + > + msi_nonbroken = true; > + loongson3_virt_devices_init(machine, liointc); > +} > + > +static void mips_loongson3_virt_machine_init(MachineClass *mc) > +{ > + mc->desc = "Loongson-3 Virtualization Platform"; > + mc->init = mips_loongson3_virt_init; > + mc->block_default_type = IF_IDE; > + mc->max_cpus = LOONGSON_MAX_VCPUS; > + mc->default_ram_id = "loongson3.highram"; > + mc->default_ram_size = 1600 * MiB; > + mc->kvm_type = mips_kvm_type; > + mc->minimum_page_bits = 14; > +} > + > +DEFINE_MACHINE("loongson3-virt", mips_loongson3_virt_machine_init) There are still some questions, but we are almost there! I can fix the leak/MachineState problem if you are lost. For smoke testing, you can have a look at test_pmon_serial_console() in https://www.mail-archive.com/qemu-devel@nongnu.org/msg752605.html (forgot the test_pmon_framebuffer_console part). This should be almost a copy/paste for your machine. Regards, Phil.
Hi, Philippe, On Tue, Nov 24, 2020 at 5:54 AM Philippe Mathieu-Daudé <f4bug@amsat.org> wrote: > > Hi Huacai, > > On 11/6/20 5:21 AM, Huacai Chen wrote: > > Add Loongson-3 based machine support, it use liointc as the interrupt > > controler and use GPEX as the pci controller. Currently it can work with > > both TCG and KVM. > > > > As the machine model is not based on any exiting physical hardware, the > > name of the machine is "loongson3-virt". It may be superseded in future > > by a real machine model. If this happens, then a regular deprecation > > procedure shall occur for "loongson3-virt" machine. > > > > We now already have a full functional Linux kernel (based on Linux-5.4.x > > LTS) here: > > > > https://github.com/chenhuacai/linux > > > > Of course the upstream kernel is also usable (the kvm host side and > > guest side have both been upstream in Linux-5.9): > > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > > > How to use QEMU/Loongson-3? > > 1, Download kernel source from the above URL; > > 2, Build a kernel with arch/mips/configs/loongson3_defconfig; > > 3, Boot a Loongson-3A4000 host with this kernel (for KVM mode); > > 4, Build QEMU-master with this patchset; > > 5, modprobe kvm (only necessary for KVM mode); > > 6, Use QEMU with TCG: > > qemu-system-mips64el -M loongson3-virt,accel=tcg -cpu Loongson-3A1000 -kernel <path_to_kernel> -append ... > > Use QEMU with KVM: > > qemu-system-mips64el -M loongson3-virt,accel=kvm -cpu Loongson-3A4000 -kernel <path_to_kernel> -append ... > > > > The "-cpu" parameter is optional here and QEMU will use the correct type for TCG/KVM automatically. > > > > Signed-off-by: Huacai Chen <chenhc@lemote.com> > > Co-developed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> > > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> > > --- > > default-configs/devices/mips64el-softmmu.mak | 1 + > > hw/mips/Kconfig | 12 + > > hw/mips/loongson3_virt.c | 614 +++++++++++++++++++++++++++ > > hw/mips/meson.build | 2 +- > > 4 files changed, 628 insertions(+), 1 deletion(-) > > create mode 100644 hw/mips/loongson3_virt.c > > > > diff --git a/default-configs/devices/mips64el-softmmu.mak b/default-configs/devices/mips64el-softmmu.mak > > index 9f8a3ef..26c660a 100644 > > --- a/default-configs/devices/mips64el-softmmu.mak > > +++ b/default-configs/devices/mips64el-softmmu.mak > > @@ -3,6 +3,7 @@ > > include mips-softmmu-common.mak > > CONFIG_IDE_VIA=y > > CONFIG_FULOONG=y > > +CONFIG_LOONGSON3V=y > > CONFIG_ATI_VGA=y > > CONFIG_RTL8139_PCI=y > > CONFIG_JAZZ=y > > diff --git a/hw/mips/Kconfig b/hw/mips/Kconfig > > index 8be7012..ef5cee1 100644 > > --- a/hw/mips/Kconfig > > +++ b/hw/mips/Kconfig > > @@ -32,6 +32,18 @@ config FULOONG > > bool > > select PCI_BONITO > > > > +config LOONGSON3V > > + bool > > + select PCKBD > > Is it used? I only see USB. OK, PCKBD will be removed. > > > + select SERIAL > > + select GOLDFISH_RTC > > + select LOONGSON_LIOINTC > > + select PCI_DEVICES > > + select PCI_EXPRESS_GENERIC_BRIDGE > > + select VIRTIO_VGA > > + select QXL if SPICE > > I don't understand the UI dependencies, as we should > be able to start this machine without UI (just console > for example). > > Maybe you want the 'imply' keyword instead? OK, I will use imply instead. > > > + select MSI_NONBROKEN > > + > > config MIPS_CPS > > bool > > select PTIMER > > diff --git a/hw/mips/loongson3_virt.c b/hw/mips/loongson3_virt.c > > new file mode 100644 > > index 0000000..c5db2db > > --- /dev/null > > +++ b/hw/mips/loongson3_virt.c > > @@ -0,0 +1,614 @@ > > +/* > > + * Generic Loongson-3 Platform support > > + * > > + * Copyright (c) 2018-2020 Huacai Chen (chenhc@lemote.com) > > + * Copyright (c) 2018-2020 Jiaxun Yang <jiaxun.yang@flygoat.com> > > + * > > + * 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 <https://www.gnu.org/licenses/>. > > + */ > > + > > +/* > > + * Generic virtualized PC Platform based on Loongson-3 CPU (MIPS64R2 with > > + * extensions, 800~2000MHz) > > + */ > > + > > +#include "qemu/osdep.h" > > +#include "qemu-common.h" > > +#include "qemu/units.h" > > +#include "qemu/cutils.h" > > +#include "qapi/error.h" > > +#include "cpu.h" > > +#include "elf.h" > > +#include "kvm_mips.h" > > +#include "hw/boards.h" > > +#include "hw/char/serial.h" > > +#include "hw/intc/loongson_liointc.h" > > +#include "hw/mips/mips.h" > > +#include "hw/mips/cpudevs.h" > > +#include "hw/mips/fw_cfg.h" > > +#include "hw/mips/loongson3_bootp.h" > > +#include "hw/misc/unimp.h" > > +#include "hw/intc/i8259.h" > > +#include "hw/loader.h" > > +#include "hw/isa/superio.h" > > +#include "hw/pci/msi.h" > > +#include "hw/pci/pci.h" > > +#include "hw/pci/pci_host.h" > > +#include "hw/pci-host/gpex.h" > > +#include "hw/usb.h" > > +#include "net/net.h" > > +#include "exec/address-spaces.h" > > +#include "sysemu/kvm.h" > > +#include "sysemu/qtest.h" > > +#include "sysemu/reset.h" > > +#include "sysemu/runstate.h" > > +#include "qemu/log.h" > > +#include "qemu/error-report.h" > > + > > +#define PM_CNTL_MODE 0x10 > > + > > +#define LOONGSON_MAX_VCPUS 16 > > + > > +/* > > + * Loongson-3's virtual machine BIOS can be obtained here: > > + * 1, https://github.com/loongson-community/firmware-nonfree > > + * 2, http://dev.lemote.com:8000/files/firmware/UEFI/KVM/bios_loongson3.bin > > + */ > > +#define LOONGSON3_BIOSNAME "bios_loongson3.bin" > > + > > +#define UART_IRQ 0 > > +#define RTC_IRQ 1 > > +#define PCIE_IRQ_BASE 2 > > + > > +const struct MemmapEntry virt_memmap[] = { > > + [VIRT_LOWMEM] = { 0x00000000, 0x10000000 }, > > + [VIRT_PM] = { 0x10080000, 0x100 }, > > + [VIRT_FW_CFG] = { 0x10080100, 0x100 }, > > + [VIRT_RTC] = { 0x10081000, 0x1000 }, > > + [VIRT_PCIE_PIO] = { 0x18000000, 0x80000 }, > > + [VIRT_PCIE_ECAM] = { 0x1a000000, 0x2000000 }, > > + [VIRT_BIOS_ROM] = { 0x1fc00000, 0x200000 }, > > + [VIRT_UART] = { 0x1fe001e0, 0x8 }, > > + [VIRT_LIOINTC] = { 0x3ff01400, 0x64 }, > > + [VIRT_PCIE_MMIO] = { 0x40000000, 0x40000000 }, > > + [VIRT_HIGHMEM] = { 0x80000000, 0x0 }, /* Variable */ > > +}; > > + > > +static const struct MemmapEntry loader_memmap[] = { > > + [LOADER_KERNEL] = { 0x00000000, 0x4000000 }, > > + [LOADER_INITRD] = { 0x04000000, 0x0 }, /* Variable */ > > + [LOADER_CMDLINE] = { 0x0ff00000, 0x100000 }, > > +}; > > + > > +static const struct MemmapEntry loader_rommap[] = { > > + [LOADER_BOOTROM] = { 0x1fc00000, 0x1000 }, > > + [LOADER_PARAM] = { 0x1fc01000, 0x10000 }, > > +}; > > + > > +static struct _loaderparams { > > + uint64_t cpu_freq; > > + uint64_t ram_size; > > + const char *kernel_cmdline; > > + const char *kernel_filename; > > + const char *initrd_filename; > > + uint64_t kernel_entry; > > + uint64_t a0, a1, a2; > > +} loaderparams; > > + > > +static uint64_t loongson3_pm_read(void *opaque, hwaddr addr, unsigned size) > > +{ > > + return 0; > > +} > > + > > +static void loongson3_pm_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) > > +{ > > + if (addr != PM_CNTL_MODE) { > > + return; > > + } > > + > > + switch (val) { > > + case 0x00: > > + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); > > + return; > > + case 0xff: > > + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); > > + return; > > + default: > > + return; > > + } > > +} > > + > > +static const MemoryRegionOps loongson3_pm_ops = { > > + .read = loongson3_pm_read, > > + .write = loongson3_pm_write, > > Any access size is OK? (from your ASM it is byte accessed). OK, I will limit it to byte access. > > > + .endianness = DEVICE_NATIVE_ENDIAN, > > +}; > > + > > +#define DEF_LOONGSON3_FREQ (800 * 1000 * 1000) > > + > > +static uint64_t get_cpu_freq_hz(void) > > +{ > > +#ifdef CONFIG_KVM > > + int ret; > > + uint64_t freq; > > + struct kvm_one_reg freq_reg = { > > + .id = KVM_REG_MIPS_COUNT_HZ, > > + .addr = (uintptr_t)(&freq) > > + }; > > + > > + if (kvm_enabled()) { > > + ret = kvm_vcpu_ioctl(first_cpu, KVM_GET_ONE_REG, &freq_reg); > > + if (ret >= 0) { > > + return freq * 2; > > + } > > + } > > +#endif > > + return DEF_LOONGSON3_FREQ; > > +} > > + > > +static void init_boot_param(void) > > +{ > > + void *p; > > + struct boot_params *bp; > > + > > + p = g_malloc0(loader_rommap[LOADER_PARAM].size); > > I'm worried Coverity complains we are leaking this. Maybe keep it > static? [updated, see MachineState comment below] > > > + bp = p; > > + > > + stw_le_p(&bp->efi.smbios.vers, 1); > > + init_reset_system(&(bp->reset_system)); > > + p += ROUND_UP(sizeof(struct boot_params), 64); > > + init_loongson_params(&(bp->efi.smbios.lp), p, > > + loaderparams.cpu_freq, loaderparams.ram_size); > > + > > + rom_add_blob_fixed("params_rom", bp, > > + loader_rommap[LOADER_PARAM].size, > > + loader_rommap[LOADER_PARAM].base); > > + > > + g_free(bp); > > + > > + loaderparams.a2 = cpu_mips_phys_to_kseg0(NULL, loader_rommap[LOADER_PARAM].base); > > +} > > + > > +static void init_boot_rom(void) > > +{ > > + const unsigned int boot_code[] = { > > + 0x40086000, /* mfc0 t0, CP0_STATUS */ > > + 0x240900E4, /* li t1, 0xe4 #set kx, sx, ux, erl */ > > + 0x01094025, /* or t0, t0, t1 */ > > + 0x3C090040, /* lui t1, 0x40 #set bev */ > > + 0x01094025, /* or t0, t0, t1 */ > > + 0x40886000, /* mtc0 t0, CP0_STATUS */ > > + 0x00000000, > > + 0x40806800, /* mtc0 zero, CP0_CAUSE */ > > + 0x00000000, > > + 0x400A7801, /* mfc0 t2, $15, 1 */ > > + 0x314A00FF, /* andi t2, 0x0ff */ > > + 0x3C089000, /* dli t0, 0x900000003ff01000 */ > > + 0x00084438, > > + 0x35083FF0, > > + 0x00084438, > > + 0x35081000, > > + 0x314B0003, /* andi t3, t2, 0x3 #local cpuid */ > > + 0x000B5A00, /* sll t3, 8 */ > > + 0x010B4025, /* or t0, t0, t3 */ > > + 0x314C000C, /* andi t4, t2, 0xc #node id */ > > + 0x000C62BC, /* dsll t4, 42 */ > > + 0x010C4025, /* or t0, t0, t4 */ > > + /* WaitForInit: */ > > + 0xDD020020, /* ld v0, FN_OFF(t0) #FN_OFF 0x020 */ > > + 0x1040FFFE, /* beqz v0, WaitForInit */ > > + 0x00000000, /* nop */ > > + 0xDD1D0028, /* ld sp, SP_OFF(t0) #FN_OFF 0x028 */ > > + 0xDD1C0030, /* ld gp, GP_OFF(t0) #FN_OFF 0x030 */ > > + 0xDD050038, /* ld a1, A1_OFF(t0) #FN_OFF 0x038 */ > > + 0x00400008, /* jr v0 #byebye */ > > + 0x00000000, /* nop */ > > + 0x1000FFFF, /* 1: b 1b */ > > + 0x00000000, /* nop */ > > + > > + /* Reset */ > > + 0x3C0C9000, /* dli t0, 0x9000000010080010 */ > > + 0x358C0000, > > + 0x000C6438, > > + 0x358C1008, > > + 0x000C6438, > > + 0x358C0010, > > + 0x240D0000, /* li t1, 0x00 */ > > + 0xA18D0000, /* sb t1, (t0) */ > > + 0x1000FFFF, /* 1: b 1b */ > > + 0x00000000, /* nop */ > > + > > + /* Shutdown */ > > + 0x3C0C9000, /* dli t0, 0x9000000010080010 */ > > + 0x358C0000, > > + 0x000C6438, > > + 0x358C1008, > > + 0x000C6438, > > + 0x358C0010, > > + 0x240D00FF, /* li t1, 0xff */ > > + 0xA18D0000, /* sb t1, (t0) */ > > + 0x1000FFFF, /* 1: b 1b */ > > + 0x00000000 /* nop */ > > + }; > > + > > + rom_add_blob_fixed("boot_rom", boot_code, sizeof(boot_code), > > + loader_rommap[LOADER_BOOTROM].base); > > +} > > + > > +static void fw_cfg_boot_set(void *opaque, const char *boot_device, > > + Error **errp) > > +{ > > + fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]); > > +} > > + > > +static void fw_conf_init(unsigned long ram_size) > > +{ > > + FWCfgState *fw_cfg; > > + hwaddr cfg_addr = virt_memmap[VIRT_FW_CFG].base; > > + > > + fw_cfg = fw_cfg_init_mem_wide(cfg_addr, cfg_addr + 8, 8, 0, NULL); > > + fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, (uint16_t)current_machine->smp.cpus); > > + fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)current_machine->smp.max_cpus); > > + fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size); > > + fw_cfg_add_i32(fw_cfg, FW_CFG_MACHINE_VERSION, 1); > > + fw_cfg_add_i64(fw_cfg, FW_CFG_CPU_FREQ, get_cpu_freq_hz()); > > + qemu_register_boot_set(fw_cfg_boot_set, fw_cfg); > > +} > > + > > +static int set_prom_cmdline(ram_addr_t initrd_offset, long initrd_size) > > +{ > > + hwaddr cmdline_vaddr; > > + char memenv[32]; > > + char highmemenv[32]; > > + void *cmdline_buf; > > + unsigned int *parg_env; > > + int ret = 0; > > + > > + /* Allocate cmdline_buf for command line. */ > > + cmdline_buf = g_malloc0(loader_memmap[LOADER_CMDLINE].size); > > + cmdline_vaddr = cpu_mips_phys_to_kseg0(NULL, > > + loader_memmap[LOADER_CMDLINE].base); > > + > > + /* > > + * Layout of cmdline_buf looks like this: > > + * argv[0], argv[1], 0, env[0], env[1], ... env[i], 0, > > + * argv[0]'s data, argv[1]'s data, env[0]'data, ..., env[i]'s data, 0 > > + */ > > + parg_env = (void *)cmdline_buf; > > + > > + ret = (3 + 1) * 4; > > + *parg_env++ = cmdline_vaddr + ret; > > + ret += (1 + snprintf(cmdline_buf + ret, 256 - ret, "g")); > > + > > + /* argv1 */ > > + *parg_env++ = cmdline_vaddr + ret; > > + if (initrd_size > 0) > > + ret += (1 + snprintf(cmdline_buf + ret, 256 - ret, > > + "rd_start=0x" TARGET_FMT_lx " rd_size=%li %s", > > + cpu_mips_phys_to_kseg0(NULL, initrd_offset), > > + initrd_size, loaderparams.kernel_cmdline)); > > + else > > + ret += (1 + snprintf(cmdline_buf + ret, 256 - ret, "%s", > > + loaderparams.kernel_cmdline)); > > + > > + /* argv2 */ > > + *parg_env++ = cmdline_vaddr + 4 * ret; > > + > > + /* env */ > > + sprintf(memenv, "%d", 256); > > Where is that used? This could be const... > > > + sprintf(highmemenv, "%ld", (unsigned long)(loaderparams.ram_size / MiB) - 256); > > Where is that used? Anyhow, if needed, please use g_strdup_printf(). OK, they will be removed. > > > + > > + rom_add_blob_fixed("cmdline", cmdline_buf, > > + loader_memmap[LOADER_CMDLINE].size, > > + loader_memmap[LOADER_CMDLINE].base); > > + > > + g_free(cmdline_buf); > > + > > + loaderparams.a0 = 2; > > + loaderparams.a1 = cmdline_vaddr; > > + > > + return 0; > > +} > > + > > +static uint64_t load_kernel(CPUMIPSState *env) > > +{ > > + long kernel_size; > > + ram_addr_t initrd_offset; > > + uint64_t kernel_entry, kernel_low, kernel_high, initrd_size; > > + > > + kernel_size = load_elf(loaderparams.kernel_filename, NULL, > > + cpu_mips_kseg0_to_phys, NULL, > > + (uint64_t *)&kernel_entry, > > + (uint64_t *)&kernel_low, (uint64_t *)&kernel_high, > > + NULL, 0, EM_MIPS, 1, 0); > > + if (kernel_size < 0) { > > + error_report("could not load kernel '%s': %s", > > + loaderparams.kernel_filename, > > + load_elf_strerror(kernel_size)); > > + exit(1); > > + } > > + > > + /* load initrd */ > > + initrd_size = 0; > > + initrd_offset = 0; > > + if (loaderparams.initrd_filename) { > > + initrd_size = get_image_size(loaderparams.initrd_filename); > > + if (initrd_size > 0) { > > + initrd_offset = MAX(loader_memmap[LOADER_INITRD].base, > > + ROUND_UP(kernel_high, INITRD_PAGE_SIZE)); > > + > > + if (initrd_offset + initrd_size > ram_size) { > > + error_report("memory too small for initial ram disk '%s'", > > + loaderparams.initrd_filename); > > + exit(1); > > + } > > + > > + initrd_size = load_image_targphys(loaderparams.initrd_filename, > > + initrd_offset, > > + ram_size - initrd_offset); > > + } > > + > > + if (initrd_size == (target_ulong) -1) { > > + error_report("could not load initial ram disk '%s'", > > + loaderparams.initrd_filename); > > + exit(1); > > + } > > + } > > + > > + /* Setup prom cmdline. */ > > + set_prom_cmdline(initrd_offset, initrd_size); > > + > > + return kernel_entry; > > +} > > + > > +static void main_cpu_reset(void *opaque) > > +{ > > + MIPSCPU *cpu = opaque; > > + CPUMIPSState *env = &cpu->env; > > + > > + cpu_reset(CPU(cpu)); > > + > > + /* Loongson-3 reset stuff */ > > + if (loaderparams.kernel_filename) { > > + if (cpu == MIPS_CPU(first_cpu)) { > > + env->active_tc.gpr[4] = loaderparams.a0; > > + env->active_tc.gpr[5] = loaderparams.a1; > > + env->active_tc.gpr[6] = loaderparams.a2; > > + env->active_tc.PC = loaderparams.kernel_entry; > > + } > > + env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL)); > > + } > > +} > > + > > +static inline void loongson3_virt_devices_init(MachineState *machine, DeviceState *pic) > > +{ > > + int i; > > + qemu_irq irq; > > + PCIBus *pci_bus; > > + DeviceState *dev; > > + MemoryRegion *pio_alias; > > + MemoryRegion *mmio_alias, *mmio_reg; > > + MemoryRegion *ecam_alias, *ecam_reg; > > + > > + dev = qdev_new(TYPE_GPEX_HOST); > > + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); > > + pci_bus = PCI_HOST_BRIDGE(dev)->bus; > > + > > + ecam_alias = g_new0(MemoryRegion, 1); > > Again, Coverity will complain for the memory leaked :( > > I think you want to keep all these pointers in an object > extending MachineState. You can check at RaspiMachineState > for an example. OK, I will do. > > > + ecam_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0); > > + memory_region_init_alias(ecam_alias, OBJECT(dev), "pcie-ecam", > > + ecam_reg, 0, virt_memmap[VIRT_PCIE_ECAM].size); > > + memory_region_add_subregion(get_system_memory(), > > + virt_memmap[VIRT_PCIE_ECAM].base, ecam_alias); > > + > > + mmio_alias = g_new0(MemoryRegion, 1); > > + mmio_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 1); > > + memory_region_init_alias(mmio_alias, OBJECT(dev), "pcie-mmio", > > + mmio_reg, virt_memmap[VIRT_PCIE_MMIO].base, > > + virt_memmap[VIRT_PCIE_MMIO].size); > > + memory_region_add_subregion(get_system_memory(), > > + virt_memmap[VIRT_PCIE_MMIO].base, mmio_alias); > > + > > + pio_alias = g_new0(MemoryRegion, 1); > > + memory_region_init_alias(pio_alias, OBJECT(dev), "pcie-pio", > > + get_system_io(), 0, virt_memmap[VIRT_PCIE_PIO].size); > > + memory_region_add_subregion(get_system_memory(), > > + virt_memmap[VIRT_PCIE_PIO].base, pio_alias); > > + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 2, virt_memmap[VIRT_PCIE_PIO].base); > > + > > + for (i = 0; i < GPEX_NUM_IRQS; i++) { > > + irq = qdev_get_gpio_in(pic, PCIE_IRQ_BASE + i); > > + sysbus_connect_irq(SYS_BUS_DEVICE(dev), i, irq); > > + gpex_set_irq_num(GPEX_HOST(dev), i, PCIE_IRQ_BASE + i); > > + } > > Maybe set here "msi_nonbroken = true;". OK. > > > + > > + pci_vga_init(pci_bus); > > Maybe part of defaults_enabled... not sure although. Not needed, other machines also do it like this. > > > + > > + if (defaults_enabled()) { > > + pci_create_simple(pci_bus, -1, "pci-ohci"); > > + usb_create_simple(usb_bus_find(-1), "usb-kbd"); > > + usb_create_simple(usb_bus_find(-1), "usb-tablet"); > > + } > > + > > + for (i = 0; i < nb_nics; i++) { > > + NICInfo *nd = &nd_table[i]; > > + > > + if (!nd->model) { > > + nd->model = g_strdup("virtio"); > > + } > > + > > + pci_nic_init_nofail(nd, pci_bus, nd->model, NULL); > > + } > > +} > > + > > +static void mips_loongson3_virt_init(MachineState *machine) > > +{ > > + int i; > > + long bios_size; > > + MIPSCPU *cpu; > > + Clock *cpuclk; > > + CPUMIPSState *env; > > + DeviceState *liointc; > > + char *filename; > > + const char *kernel_cmdline = machine->kernel_cmdline; > > + const char *kernel_filename = machine->kernel_filename; > > + const char *initrd_filename = machine->initrd_filename; > > + ram_addr_t ram_size = machine->ram_size; > > + MemoryRegion *address_space_mem = get_system_memory(); > > + MemoryRegion *ram = g_new(MemoryRegion, 1); > > + MemoryRegion *bios = g_new(MemoryRegion, 1); > > + MemoryRegion *iomem = g_new(MemoryRegion, 1); > > + > > + /* TODO: TCG will support all CPU types */ > > + if (!kvm_enabled()) { > > + if (!machine->cpu_type) { > > + machine->cpu_type = MIPS_CPU_TYPE_NAME("Loongson-3A1000"); > > + } > > + if (!strstr(machine->cpu_type, "Loongson-3A1000")) { > > + error_report("Loongson-3/TCG needs cpu type Loongson-3A1000"); > > Why not accept any 3A family? Because some new instructions hadn't been emulated in qemu. > > > + exit(1); > > + } > > + } else { > > + if (!machine->cpu_type) { > > + machine->cpu_type = MIPS_CPU_TYPE_NAME("Loongson-3A4000"); > > + } > > + if (!strstr(machine->cpu_type, "Loongson-3A4000")) { > > + error_report("Loongson-3/KVM needs cpu type Loongson-3A4000"); > > + exit(1); > > + } > > + } > > + > > + if (ram_size < 512 * MiB) { > > + error_report("Loongson-3 machine needs at least 512MB memory"); > > + exit(1); > > + } > > + > > + /* > > + * The whole MMIO range among configure registers doesn't generate > > + * exception when accessing invalid memory. Create some unimplememted > > + * devices to emulate this feature. > > + */ > > + create_unimplemented_device("mmio fallback 0", 0x10000000, 256 * MiB); > > + create_unimplemented_device("mmio fallback 1", 0x30000000, 256 * MiB); > > + > > + liointc = qdev_new("loongson.liointc"); > > + sysbus_realize_and_unref(SYS_BUS_DEVICE(liointc), &error_fatal); > > + > > + sysbus_mmio_map(SYS_BUS_DEVICE(liointc), 0, virt_memmap[VIRT_LIOINTC].base); > > + > > + serial_mm_init(address_space_mem, virt_memmap[VIRT_UART].base, 0, > > + qdev_get_gpio_in(liointc, UART_IRQ), 115200, serial_hd(0), > > + DEVICE_NATIVE_ENDIAN); > > + > > + sysbus_create_simple("goldfish_rtc", virt_memmap[VIRT_RTC].base, > > + qdev_get_gpio_in(liointc, RTC_IRQ)); > > + > > + cpuclk = clock_new(OBJECT(machine), "cpu-refclk"); > > + clock_set_hz(cpuclk, DEF_LOONGSON3_FREQ); > > + > > + for (i = 0; i < machine->smp.cpus; i++) { > > + int ip; > > + > > + /* init CPUs */ > > + cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk); > > + > > + /* Init internal devices */ > > + cpu_mips_irq_init_cpu(cpu); > > + cpu_mips_clock_init(cpu); > > + qemu_register_reset(main_cpu_reset, cpu); > > + > > + if (i >= 4) { > > + continue; /* Only node-0 can be connected to LIOINTC */ > > + } > > + > > + for (ip = 0; ip < 4 ; ip++) { > > + int pin = i * 4 + ip; > > + sysbus_connect_irq(SYS_BUS_DEVICE(liointc), > > + pin, cpu->env.irq[ip + 2]); > > + } > > + } > > + env = &MIPS_CPU(first_cpu)->env; > > + > > + /* Allocate RAM/BIOS, 0x00000000~0x10000000 is alias of 0x80000000~0x90000000 */ > > + memory_region_init_rom(bios, NULL, "loongson3.bios", > > + virt_memmap[VIRT_BIOS_ROM].size, &error_fatal); > > + memory_region_init_alias(ram, NULL, "loongson3.lowmem", > > + machine->ram, 0, virt_memmap[VIRT_LOWMEM].size); > > + memory_region_init_io(iomem, NULL, &loongson3_pm_ops, > > + NULL, "loongson3_pm", virt_memmap[VIRT_PM].size); > > + > > + memory_region_add_subregion(address_space_mem, > > + virt_memmap[VIRT_LOWMEM].base, ram); > > + memory_region_add_subregion(address_space_mem, > > + virt_memmap[VIRT_BIOS_ROM].base, bios); > > + memory_region_add_subregion(address_space_mem, > > + virt_memmap[VIRT_HIGHMEM].base, machine->ram); > > + memory_region_add_subregion(address_space_mem, > > + virt_memmap[VIRT_PM].base, iomem); > > + > > + /* > > + * We do not support flash operation, just loading bios.bin as raw BIOS. > > + * Please use -L to set the BIOS path and -bios to set bios name. > > + */ > > + > > + if (kernel_filename) { > > + loaderparams.cpu_freq = get_cpu_freq_hz(); > > + loaderparams.ram_size = ram_size; > > + loaderparams.kernel_filename = kernel_filename; > > + loaderparams.kernel_cmdline = kernel_cmdline; > > + loaderparams.initrd_filename = initrd_filename; > > + loaderparams.kernel_entry = load_kernel(env); > > + > > + init_boot_rom(); > > + init_boot_param(); > > + } else { > > + if (bios_name == NULL) { > > + bios_name = LOONGSON3_BIOSNAME; > > + } > > + filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); > > + if (filename) { > > + bios_size = load_image_targphys(filename, > > + virt_memmap[VIRT_BIOS_ROM].base, > > + virt_memmap[VIRT_BIOS_ROM].size); > > + g_free(filename); > > + } else { > > + bios_size = -1; > > + } > > + > > + if ((bios_size < 0 || bios_size > virt_memmap[VIRT_BIOS_ROM].size) && > > + !kernel_filename && !qtest_enabled()) { > > + error_report("Could not load MIPS bios '%s'", bios_name); > > + exit(1); > > + } > > + > > + fw_conf_init(ram_size); > > + } > > + > > + msi_nonbroken = true; > > + loongson3_virt_devices_init(machine, liointc); > > +} > > + > > +static void mips_loongson3_virt_machine_init(MachineClass *mc) > > +{ > > + mc->desc = "Loongson-3 Virtualization Platform"; > > + mc->init = mips_loongson3_virt_init; > > + mc->block_default_type = IF_IDE; > > + mc->max_cpus = LOONGSON_MAX_VCPUS; > > + mc->default_ram_id = "loongson3.highram"; > > + mc->default_ram_size = 1600 * MiB; > > + mc->kvm_type = mips_kvm_type; > > + mc->minimum_page_bits = 14; > > +} > > + > > +DEFINE_MACHINE("loongson3-virt", mips_loongson3_virt_machine_init) > > There are still some questions, but we are almost there! > > I can fix the leak/MachineState problem if you are lost. > > For smoke testing, you can have a look at test_pmon_serial_console() > in https://www.mail-archive.com/qemu-devel@nongnu.org/msg752605.html > (forgot the test_pmon_framebuffer_console part). > This should be almost a copy/paste for your machine. I will improve these problems in the next version, thanks. Huacai > > Regards, > > Phil.
diff --git a/default-configs/devices/mips64el-softmmu.mak b/default-configs/devices/mips64el-softmmu.mak index 9f8a3ef..26c660a 100644 --- a/default-configs/devices/mips64el-softmmu.mak +++ b/default-configs/devices/mips64el-softmmu.mak @@ -3,6 +3,7 @@ include mips-softmmu-common.mak CONFIG_IDE_VIA=y CONFIG_FULOONG=y +CONFIG_LOONGSON3V=y CONFIG_ATI_VGA=y CONFIG_RTL8139_PCI=y CONFIG_JAZZ=y diff --git a/hw/mips/Kconfig b/hw/mips/Kconfig index 8be7012..ef5cee1 100644 --- a/hw/mips/Kconfig +++ b/hw/mips/Kconfig @@ -32,6 +32,18 @@ config FULOONG bool select PCI_BONITO +config LOONGSON3V + bool + select PCKBD + select SERIAL + select GOLDFISH_RTC + select LOONGSON_LIOINTC + select PCI_DEVICES + select PCI_EXPRESS_GENERIC_BRIDGE + select VIRTIO_VGA + select QXL if SPICE + select MSI_NONBROKEN + config MIPS_CPS bool select PTIMER diff --git a/hw/mips/loongson3_virt.c b/hw/mips/loongson3_virt.c new file mode 100644 index 0000000..c5db2db --- /dev/null +++ b/hw/mips/loongson3_virt.c @@ -0,0 +1,614 @@ +/* + * Generic Loongson-3 Platform support + * + * Copyright (c) 2018-2020 Huacai Chen (chenhc@lemote.com) + * Copyright (c) 2018-2020 Jiaxun Yang <jiaxun.yang@flygoat.com> + * + * 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 <https://www.gnu.org/licenses/>. + */ + +/* + * Generic virtualized PC Platform based on Loongson-3 CPU (MIPS64R2 with + * extensions, 800~2000MHz) + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "qemu/units.h" +#include "qemu/cutils.h" +#include "qapi/error.h" +#include "cpu.h" +#include "elf.h" +#include "kvm_mips.h" +#include "hw/boards.h" +#include "hw/char/serial.h" +#include "hw/intc/loongson_liointc.h" +#include "hw/mips/mips.h" +#include "hw/mips/cpudevs.h" +#include "hw/mips/fw_cfg.h" +#include "hw/mips/loongson3_bootp.h" +#include "hw/misc/unimp.h" +#include "hw/intc/i8259.h" +#include "hw/loader.h" +#include "hw/isa/superio.h" +#include "hw/pci/msi.h" +#include "hw/pci/pci.h" +#include "hw/pci/pci_host.h" +#include "hw/pci-host/gpex.h" +#include "hw/usb.h" +#include "net/net.h" +#include "exec/address-spaces.h" +#include "sysemu/kvm.h" +#include "sysemu/qtest.h" +#include "sysemu/reset.h" +#include "sysemu/runstate.h" +#include "qemu/log.h" +#include "qemu/error-report.h" + +#define PM_CNTL_MODE 0x10 + +#define LOONGSON_MAX_VCPUS 16 + +/* + * Loongson-3's virtual machine BIOS can be obtained here: + * 1, https://github.com/loongson-community/firmware-nonfree + * 2, http://dev.lemote.com:8000/files/firmware/UEFI/KVM/bios_loongson3.bin + */ +#define LOONGSON3_BIOSNAME "bios_loongson3.bin" + +#define UART_IRQ 0 +#define RTC_IRQ 1 +#define PCIE_IRQ_BASE 2 + +const struct MemmapEntry virt_memmap[] = { + [VIRT_LOWMEM] = { 0x00000000, 0x10000000 }, + [VIRT_PM] = { 0x10080000, 0x100 }, + [VIRT_FW_CFG] = { 0x10080100, 0x100 }, + [VIRT_RTC] = { 0x10081000, 0x1000 }, + [VIRT_PCIE_PIO] = { 0x18000000, 0x80000 }, + [VIRT_PCIE_ECAM] = { 0x1a000000, 0x2000000 }, + [VIRT_BIOS_ROM] = { 0x1fc00000, 0x200000 }, + [VIRT_UART] = { 0x1fe001e0, 0x8 }, + [VIRT_LIOINTC] = { 0x3ff01400, 0x64 }, + [VIRT_PCIE_MMIO] = { 0x40000000, 0x40000000 }, + [VIRT_HIGHMEM] = { 0x80000000, 0x0 }, /* Variable */ +}; + +static const struct MemmapEntry loader_memmap[] = { + [LOADER_KERNEL] = { 0x00000000, 0x4000000 }, + [LOADER_INITRD] = { 0x04000000, 0x0 }, /* Variable */ + [LOADER_CMDLINE] = { 0x0ff00000, 0x100000 }, +}; + +static const struct MemmapEntry loader_rommap[] = { + [LOADER_BOOTROM] = { 0x1fc00000, 0x1000 }, + [LOADER_PARAM] = { 0x1fc01000, 0x10000 }, +}; + +static struct _loaderparams { + uint64_t cpu_freq; + uint64_t ram_size; + const char *kernel_cmdline; + const char *kernel_filename; + const char *initrd_filename; + uint64_t kernel_entry; + uint64_t a0, a1, a2; +} loaderparams; + +static uint64_t loongson3_pm_read(void *opaque, hwaddr addr, unsigned size) +{ + return 0; +} + +static void loongson3_pm_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) +{ + if (addr != PM_CNTL_MODE) { + return; + } + + switch (val) { + case 0x00: + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); + return; + case 0xff: + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); + return; + default: + return; + } +} + +static const MemoryRegionOps loongson3_pm_ops = { + .read = loongson3_pm_read, + .write = loongson3_pm_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +#define DEF_LOONGSON3_FREQ (800 * 1000 * 1000) + +static uint64_t get_cpu_freq_hz(void) +{ +#ifdef CONFIG_KVM + int ret; + uint64_t freq; + struct kvm_one_reg freq_reg = { + .id = KVM_REG_MIPS_COUNT_HZ, + .addr = (uintptr_t)(&freq) + }; + + if (kvm_enabled()) { + ret = kvm_vcpu_ioctl(first_cpu, KVM_GET_ONE_REG, &freq_reg); + if (ret >= 0) { + return freq * 2; + } + } +#endif + return DEF_LOONGSON3_FREQ; +} + +static void init_boot_param(void) +{ + void *p; + struct boot_params *bp; + + p = g_malloc0(loader_rommap[LOADER_PARAM].size); + bp = p; + + stw_le_p(&bp->efi.smbios.vers, 1); + init_reset_system(&(bp->reset_system)); + p += ROUND_UP(sizeof(struct boot_params), 64); + init_loongson_params(&(bp->efi.smbios.lp), p, + loaderparams.cpu_freq, loaderparams.ram_size); + + rom_add_blob_fixed("params_rom", bp, + loader_rommap[LOADER_PARAM].size, + loader_rommap[LOADER_PARAM].base); + + g_free(bp); + + loaderparams.a2 = cpu_mips_phys_to_kseg0(NULL, loader_rommap[LOADER_PARAM].base); +} + +static void init_boot_rom(void) +{ + const unsigned int boot_code[] = { + 0x40086000, /* mfc0 t0, CP0_STATUS */ + 0x240900E4, /* li t1, 0xe4 #set kx, sx, ux, erl */ + 0x01094025, /* or t0, t0, t1 */ + 0x3C090040, /* lui t1, 0x40 #set bev */ + 0x01094025, /* or t0, t0, t1 */ + 0x40886000, /* mtc0 t0, CP0_STATUS */ + 0x00000000, + 0x40806800, /* mtc0 zero, CP0_CAUSE */ + 0x00000000, + 0x400A7801, /* mfc0 t2, $15, 1 */ + 0x314A00FF, /* andi t2, 0x0ff */ + 0x3C089000, /* dli t0, 0x900000003ff01000 */ + 0x00084438, + 0x35083FF0, + 0x00084438, + 0x35081000, + 0x314B0003, /* andi t3, t2, 0x3 #local cpuid */ + 0x000B5A00, /* sll t3, 8 */ + 0x010B4025, /* or t0, t0, t3 */ + 0x314C000C, /* andi t4, t2, 0xc #node id */ + 0x000C62BC, /* dsll t4, 42 */ + 0x010C4025, /* or t0, t0, t4 */ + /* WaitForInit: */ + 0xDD020020, /* ld v0, FN_OFF(t0) #FN_OFF 0x020 */ + 0x1040FFFE, /* beqz v0, WaitForInit */ + 0x00000000, /* nop */ + 0xDD1D0028, /* ld sp, SP_OFF(t0) #FN_OFF 0x028 */ + 0xDD1C0030, /* ld gp, GP_OFF(t0) #FN_OFF 0x030 */ + 0xDD050038, /* ld a1, A1_OFF(t0) #FN_OFF 0x038 */ + 0x00400008, /* jr v0 #byebye */ + 0x00000000, /* nop */ + 0x1000FFFF, /* 1: b 1b */ + 0x00000000, /* nop */ + + /* Reset */ + 0x3C0C9000, /* dli t0, 0x9000000010080010 */ + 0x358C0000, + 0x000C6438, + 0x358C1008, + 0x000C6438, + 0x358C0010, + 0x240D0000, /* li t1, 0x00 */ + 0xA18D0000, /* sb t1, (t0) */ + 0x1000FFFF, /* 1: b 1b */ + 0x00000000, /* nop */ + + /* Shutdown */ + 0x3C0C9000, /* dli t0, 0x9000000010080010 */ + 0x358C0000, + 0x000C6438, + 0x358C1008, + 0x000C6438, + 0x358C0010, + 0x240D00FF, /* li t1, 0xff */ + 0xA18D0000, /* sb t1, (t0) */ + 0x1000FFFF, /* 1: b 1b */ + 0x00000000 /* nop */ + }; + + rom_add_blob_fixed("boot_rom", boot_code, sizeof(boot_code), + loader_rommap[LOADER_BOOTROM].base); +} + +static void fw_cfg_boot_set(void *opaque, const char *boot_device, + Error **errp) +{ + fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]); +} + +static void fw_conf_init(unsigned long ram_size) +{ + FWCfgState *fw_cfg; + hwaddr cfg_addr = virt_memmap[VIRT_FW_CFG].base; + + fw_cfg = fw_cfg_init_mem_wide(cfg_addr, cfg_addr + 8, 8, 0, NULL); + fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, (uint16_t)current_machine->smp.cpus); + fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)current_machine->smp.max_cpus); + fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size); + fw_cfg_add_i32(fw_cfg, FW_CFG_MACHINE_VERSION, 1); + fw_cfg_add_i64(fw_cfg, FW_CFG_CPU_FREQ, get_cpu_freq_hz()); + qemu_register_boot_set(fw_cfg_boot_set, fw_cfg); +} + +static int set_prom_cmdline(ram_addr_t initrd_offset, long initrd_size) +{ + hwaddr cmdline_vaddr; + char memenv[32]; + char highmemenv[32]; + void *cmdline_buf; + unsigned int *parg_env; + int ret = 0; + + /* Allocate cmdline_buf for command line. */ + cmdline_buf = g_malloc0(loader_memmap[LOADER_CMDLINE].size); + cmdline_vaddr = cpu_mips_phys_to_kseg0(NULL, + loader_memmap[LOADER_CMDLINE].base); + + /* + * Layout of cmdline_buf looks like this: + * argv[0], argv[1], 0, env[0], env[1], ... env[i], 0, + * argv[0]'s data, argv[1]'s data, env[0]'data, ..., env[i]'s data, 0 + */ + parg_env = (void *)cmdline_buf; + + ret = (3 + 1) * 4; + *parg_env++ = cmdline_vaddr + ret; + ret += (1 + snprintf(cmdline_buf + ret, 256 - ret, "g")); + + /* argv1 */ + *parg_env++ = cmdline_vaddr + ret; + if (initrd_size > 0) + ret += (1 + snprintf(cmdline_buf + ret, 256 - ret, + "rd_start=0x" TARGET_FMT_lx " rd_size=%li %s", + cpu_mips_phys_to_kseg0(NULL, initrd_offset), + initrd_size, loaderparams.kernel_cmdline)); + else + ret += (1 + snprintf(cmdline_buf + ret, 256 - ret, "%s", + loaderparams.kernel_cmdline)); + + /* argv2 */ + *parg_env++ = cmdline_vaddr + 4 * ret; + + /* env */ + sprintf(memenv, "%d", 256); + sprintf(highmemenv, "%ld", (unsigned long)(loaderparams.ram_size / MiB) - 256); + + rom_add_blob_fixed("cmdline", cmdline_buf, + loader_memmap[LOADER_CMDLINE].size, + loader_memmap[LOADER_CMDLINE].base); + + g_free(cmdline_buf); + + loaderparams.a0 = 2; + loaderparams.a1 = cmdline_vaddr; + + return 0; +} + +static uint64_t load_kernel(CPUMIPSState *env) +{ + long kernel_size; + ram_addr_t initrd_offset; + uint64_t kernel_entry, kernel_low, kernel_high, initrd_size; + + kernel_size = load_elf(loaderparams.kernel_filename, NULL, + cpu_mips_kseg0_to_phys, NULL, + (uint64_t *)&kernel_entry, + (uint64_t *)&kernel_low, (uint64_t *)&kernel_high, + NULL, 0, EM_MIPS, 1, 0); + if (kernel_size < 0) { + error_report("could not load kernel '%s': %s", + loaderparams.kernel_filename, + load_elf_strerror(kernel_size)); + exit(1); + } + + /* load initrd */ + initrd_size = 0; + initrd_offset = 0; + if (loaderparams.initrd_filename) { + initrd_size = get_image_size(loaderparams.initrd_filename); + if (initrd_size > 0) { + initrd_offset = MAX(loader_memmap[LOADER_INITRD].base, + ROUND_UP(kernel_high, INITRD_PAGE_SIZE)); + + if (initrd_offset + initrd_size > ram_size) { + error_report("memory too small for initial ram disk '%s'", + loaderparams.initrd_filename); + exit(1); + } + + initrd_size = load_image_targphys(loaderparams.initrd_filename, + initrd_offset, + ram_size - initrd_offset); + } + + if (initrd_size == (target_ulong) -1) { + error_report("could not load initial ram disk '%s'", + loaderparams.initrd_filename); + exit(1); + } + } + + /* Setup prom cmdline. */ + set_prom_cmdline(initrd_offset, initrd_size); + + return kernel_entry; +} + +static void main_cpu_reset(void *opaque) +{ + MIPSCPU *cpu = opaque; + CPUMIPSState *env = &cpu->env; + + cpu_reset(CPU(cpu)); + + /* Loongson-3 reset stuff */ + if (loaderparams.kernel_filename) { + if (cpu == MIPS_CPU(first_cpu)) { + env->active_tc.gpr[4] = loaderparams.a0; + env->active_tc.gpr[5] = loaderparams.a1; + env->active_tc.gpr[6] = loaderparams.a2; + env->active_tc.PC = loaderparams.kernel_entry; + } + env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL)); + } +} + +static inline void loongson3_virt_devices_init(MachineState *machine, DeviceState *pic) +{ + int i; + qemu_irq irq; + PCIBus *pci_bus; + DeviceState *dev; + MemoryRegion *pio_alias; + MemoryRegion *mmio_alias, *mmio_reg; + MemoryRegion *ecam_alias, *ecam_reg; + + dev = qdev_new(TYPE_GPEX_HOST); + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); + pci_bus = PCI_HOST_BRIDGE(dev)->bus; + + ecam_alias = g_new0(MemoryRegion, 1); + ecam_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0); + memory_region_init_alias(ecam_alias, OBJECT(dev), "pcie-ecam", + ecam_reg, 0, virt_memmap[VIRT_PCIE_ECAM].size); + memory_region_add_subregion(get_system_memory(), + virt_memmap[VIRT_PCIE_ECAM].base, ecam_alias); + + mmio_alias = g_new0(MemoryRegion, 1); + mmio_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 1); + memory_region_init_alias(mmio_alias, OBJECT(dev), "pcie-mmio", + mmio_reg, virt_memmap[VIRT_PCIE_MMIO].base, + virt_memmap[VIRT_PCIE_MMIO].size); + memory_region_add_subregion(get_system_memory(), + virt_memmap[VIRT_PCIE_MMIO].base, mmio_alias); + + pio_alias = g_new0(MemoryRegion, 1); + memory_region_init_alias(pio_alias, OBJECT(dev), "pcie-pio", + get_system_io(), 0, virt_memmap[VIRT_PCIE_PIO].size); + memory_region_add_subregion(get_system_memory(), + virt_memmap[VIRT_PCIE_PIO].base, pio_alias); + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 2, virt_memmap[VIRT_PCIE_PIO].base); + + for (i = 0; i < GPEX_NUM_IRQS; i++) { + irq = qdev_get_gpio_in(pic, PCIE_IRQ_BASE + i); + sysbus_connect_irq(SYS_BUS_DEVICE(dev), i, irq); + gpex_set_irq_num(GPEX_HOST(dev), i, PCIE_IRQ_BASE + i); + } + + pci_vga_init(pci_bus); + + if (defaults_enabled()) { + pci_create_simple(pci_bus, -1, "pci-ohci"); + usb_create_simple(usb_bus_find(-1), "usb-kbd"); + usb_create_simple(usb_bus_find(-1), "usb-tablet"); + } + + for (i = 0; i < nb_nics; i++) { + NICInfo *nd = &nd_table[i]; + + if (!nd->model) { + nd->model = g_strdup("virtio"); + } + + pci_nic_init_nofail(nd, pci_bus, nd->model, NULL); + } +} + +static void mips_loongson3_virt_init(MachineState *machine) +{ + int i; + long bios_size; + MIPSCPU *cpu; + Clock *cpuclk; + CPUMIPSState *env; + DeviceState *liointc; + char *filename; + const char *kernel_cmdline = machine->kernel_cmdline; + const char *kernel_filename = machine->kernel_filename; + const char *initrd_filename = machine->initrd_filename; + ram_addr_t ram_size = machine->ram_size; + MemoryRegion *address_space_mem = get_system_memory(); + MemoryRegion *ram = g_new(MemoryRegion, 1); + MemoryRegion *bios = g_new(MemoryRegion, 1); + MemoryRegion *iomem = g_new(MemoryRegion, 1); + + /* TODO: TCG will support all CPU types */ + if (!kvm_enabled()) { + if (!machine->cpu_type) { + machine->cpu_type = MIPS_CPU_TYPE_NAME("Loongson-3A1000"); + } + if (!strstr(machine->cpu_type, "Loongson-3A1000")) { + error_report("Loongson-3/TCG needs cpu type Loongson-3A1000"); + exit(1); + } + } else { + if (!machine->cpu_type) { + machine->cpu_type = MIPS_CPU_TYPE_NAME("Loongson-3A4000"); + } + if (!strstr(machine->cpu_type, "Loongson-3A4000")) { + error_report("Loongson-3/KVM needs cpu type Loongson-3A4000"); + exit(1); + } + } + + if (ram_size < 512 * MiB) { + error_report("Loongson-3 machine needs at least 512MB memory"); + exit(1); + } + + /* + * The whole MMIO range among configure registers doesn't generate + * exception when accessing invalid memory. Create some unimplememted + * devices to emulate this feature. + */ + create_unimplemented_device("mmio fallback 0", 0x10000000, 256 * MiB); + create_unimplemented_device("mmio fallback 1", 0x30000000, 256 * MiB); + + liointc = qdev_new("loongson.liointc"); + sysbus_realize_and_unref(SYS_BUS_DEVICE(liointc), &error_fatal); + + sysbus_mmio_map(SYS_BUS_DEVICE(liointc), 0, virt_memmap[VIRT_LIOINTC].base); + + serial_mm_init(address_space_mem, virt_memmap[VIRT_UART].base, 0, + qdev_get_gpio_in(liointc, UART_IRQ), 115200, serial_hd(0), + DEVICE_NATIVE_ENDIAN); + + sysbus_create_simple("goldfish_rtc", virt_memmap[VIRT_RTC].base, + qdev_get_gpio_in(liointc, RTC_IRQ)); + + cpuclk = clock_new(OBJECT(machine), "cpu-refclk"); + clock_set_hz(cpuclk, DEF_LOONGSON3_FREQ); + + for (i = 0; i < machine->smp.cpus; i++) { + int ip; + + /* init CPUs */ + cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk); + + /* Init internal devices */ + cpu_mips_irq_init_cpu(cpu); + cpu_mips_clock_init(cpu); + qemu_register_reset(main_cpu_reset, cpu); + + if (i >= 4) { + continue; /* Only node-0 can be connected to LIOINTC */ + } + + for (ip = 0; ip < 4 ; ip++) { + int pin = i * 4 + ip; + sysbus_connect_irq(SYS_BUS_DEVICE(liointc), + pin, cpu->env.irq[ip + 2]); + } + } + env = &MIPS_CPU(first_cpu)->env; + + /* Allocate RAM/BIOS, 0x00000000~0x10000000 is alias of 0x80000000~0x90000000 */ + memory_region_init_rom(bios, NULL, "loongson3.bios", + virt_memmap[VIRT_BIOS_ROM].size, &error_fatal); + memory_region_init_alias(ram, NULL, "loongson3.lowmem", + machine->ram, 0, virt_memmap[VIRT_LOWMEM].size); + memory_region_init_io(iomem, NULL, &loongson3_pm_ops, + NULL, "loongson3_pm", virt_memmap[VIRT_PM].size); + + memory_region_add_subregion(address_space_mem, + virt_memmap[VIRT_LOWMEM].base, ram); + memory_region_add_subregion(address_space_mem, + virt_memmap[VIRT_BIOS_ROM].base, bios); + memory_region_add_subregion(address_space_mem, + virt_memmap[VIRT_HIGHMEM].base, machine->ram); + memory_region_add_subregion(address_space_mem, + virt_memmap[VIRT_PM].base, iomem); + + /* + * We do not support flash operation, just loading bios.bin as raw BIOS. + * Please use -L to set the BIOS path and -bios to set bios name. + */ + + if (kernel_filename) { + loaderparams.cpu_freq = get_cpu_freq_hz(); + loaderparams.ram_size = ram_size; + loaderparams.kernel_filename = kernel_filename; + loaderparams.kernel_cmdline = kernel_cmdline; + loaderparams.initrd_filename = initrd_filename; + loaderparams.kernel_entry = load_kernel(env); + + init_boot_rom(); + init_boot_param(); + } else { + if (bios_name == NULL) { + bios_name = LOONGSON3_BIOSNAME; + } + filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); + if (filename) { + bios_size = load_image_targphys(filename, + virt_memmap[VIRT_BIOS_ROM].base, + virt_memmap[VIRT_BIOS_ROM].size); + g_free(filename); + } else { + bios_size = -1; + } + + if ((bios_size < 0 || bios_size > virt_memmap[VIRT_BIOS_ROM].size) && + !kernel_filename && !qtest_enabled()) { + error_report("Could not load MIPS bios '%s'", bios_name); + exit(1); + } + + fw_conf_init(ram_size); + } + + msi_nonbroken = true; + loongson3_virt_devices_init(machine, liointc); +} + +static void mips_loongson3_virt_machine_init(MachineClass *mc) +{ + mc->desc = "Loongson-3 Virtualization Platform"; + mc->init = mips_loongson3_virt_init; + mc->block_default_type = IF_IDE; + mc->max_cpus = LOONGSON_MAX_VCPUS; + mc->default_ram_id = "loongson3.highram"; + mc->default_ram_size = 1600 * MiB; + mc->kvm_type = mips_kvm_type; + mc->minimum_page_bits = 14; +} + +DEFINE_MACHINE("loongson3-virt", mips_loongson3_virt_machine_init) diff --git a/hw/mips/meson.build b/hw/mips/meson.build index 9e58c2b..73a961d 100644 --- a/hw/mips/meson.build +++ b/hw/mips/meson.build @@ -1,7 +1,7 @@ mips_ss = ss.source_set() mips_ss.add(files('addr.c', 'mips_int.c', 'fw_cfg.c')) mips_ss.add(when: 'CONFIG_FULOONG', if_true: files('fuloong2e.c')) -mips_ss.add(when: 'CONFIG_LOONGSON3V', if_true: files('loongson3_bootp.c')) +mips_ss.add(when: 'CONFIG_LOONGSON3V', if_true: files('loongson3_bootp.c', 'loongson3_virt.c')) mips_ss.add(when: 'CONFIG_JAZZ', if_true: files('jazz.c')) mips_ss.add(when: 'CONFIG_MALTA', if_true: files('gt64xxx_pci.c', 'malta.c')) mips_ss.add(when: 'CONFIG_MIPSSIM', if_true: files('mipssim.c'))
Add Loongson-3 based machine support, it use liointc as the interrupt controler and use GPEX as the pci controller. Currently it can work with both TCG and KVM. As the machine model is not based on any exiting physical hardware, the name of the machine is "loongson3-virt". It may be superseded in future by a real machine model. If this happens, then a regular deprecation procedure shall occur for "loongson3-virt" machine. We now already have a full functional Linux kernel (based on Linux-5.4.x LTS) here: https://github.com/chenhuacai/linux Of course the upstream kernel is also usable (the kvm host side and guest side have both been upstream in Linux-5.9): https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git How to use QEMU/Loongson-3? 1, Download kernel source from the above URL; 2, Build a kernel with arch/mips/configs/loongson3_defconfig; 3, Boot a Loongson-3A4000 host with this kernel (for KVM mode); 4, Build QEMU-master with this patchset; 5, modprobe kvm (only necessary for KVM mode); 6, Use QEMU with TCG: qemu-system-mips64el -M loongson3-virt,accel=tcg -cpu Loongson-3A1000 -kernel <path_to_kernel> -append ... Use QEMU with KVM: qemu-system-mips64el -M loongson3-virt,accel=kvm -cpu Loongson-3A4000 -kernel <path_to_kernel> -append ... The "-cpu" parameter is optional here and QEMU will use the correct type for TCG/KVM automatically. Signed-off-by: Huacai Chen <chenhc@lemote.com> Co-developed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> --- default-configs/devices/mips64el-softmmu.mak | 1 + hw/mips/Kconfig | 12 + hw/mips/loongson3_virt.c | 614 +++++++++++++++++++++++++++ hw/mips/meson.build | 2 +- 4 files changed, 628 insertions(+), 1 deletion(-) create mode 100644 hw/mips/loongson3_virt.c