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qemu/hw/riscv/spike.c
Peter Maydell 2ac031d171 RISC-V Patches for the 5.0 Soft Freeze, Part 3 
This pull request is almost entirely an implementation of the draft hypervisor
 extension.  This extension is still in draft and is expected to have
 incompatible changes before being frozen, but we've had good luck managing
 other RISC-V draft extensions in QEMU so far.
 
 Additionally, there's a fix to PCI addressing and some improvements to the
 M-mode timer.
 
 This boots linux and passes make check for me.
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Merge remote-tracking branch 'remotes/palmer/tags/riscv-for-master-5.0-sf3' into staging

RISC-V Patches for the 5.0 Soft Freeze, Part 3

This pull request is almost entirely an implementation of the draft hypervisor
extension.  This extension is still in draft and is expected to have
incompatible changes before being frozen, but we've had good luck managing
other RISC-V draft extensions in QEMU so far.

Additionally, there's a fix to PCI addressing and some improvements to the
M-mode timer.

This boots linux and passes make check for me.

# gpg: Signature made Tue 03 Mar 2020 00:23:20 GMT
# gpg:                using RSA key 2B3C3747446843B24A943A7A2E1319F35FBB1889
# gpg:                issuer "palmer@dabbelt.com"
# gpg: Good signature from "Palmer Dabbelt <palmer@dabbelt.com>" [unknown]
# gpg:                 aka "Palmer Dabbelt <palmer@sifive.com>" [unknown]
# gpg:                 aka "Palmer Dabbelt <palmerdabbelt@google.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 00CE 76D1 8349 60DF CE88  6DF8 EF4C A150 2CCB AB41
#      Subkey fingerprint: 2B3C 3747 4468 43B2 4A94  3A7A 2E13 19F3 5FBB 1889

* remotes/palmer/tags/riscv-for-master-5.0-sf3: (38 commits)
  hw/riscv: Provide rdtime callback for TCG in CLINT emulation
  target/riscv: Emulate TIME CSRs for privileged mode
  riscv: virt: Allow PCI address 0
  target/riscv: Allow enabling the Hypervisor extension
  target/riscv: Add the MSTATUS_MPV_ISSET helper macro
  target/riscv: Add support for the 32-bit MSTATUSH CSR
  target/riscv: Set htval and mtval2 on execptions
  target/riscv: Raise the new execptions when 2nd stage translation fails
  target/riscv: Implement second stage MMU
  target/riscv: Allow specifying MMU stage
  target/riscv: Respect MPRV and SPRV for floating point ops
  target/riscv: Mark both sstatus and msstatus_hs as dirty
  target/riscv: Disable guest FP support based on virtual status
  target/riscv: Only set TB flags with FP status if enabled
  target/riscv: Remove the hret instruction
  target/riscv: Add hfence instructions
  target/riscv: Add Hypervisor trap return support
  target/riscv: Add hypvervisor trap support
  target/riscv: Generate illegal instruction on WFI when V=1
  target/ricsv: Flush the TLB on virtulisation mode changes
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-03-03 11:06:39 +00:00

460 lines
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/*
* QEMU RISC-V Spike Board
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017-2018 SiFive, Inc.
*
* This provides a RISC-V Board with the following devices:
*
* 0) HTIF Console and Poweroff
* 1) CLINT (Timer and IPI)
* 2) PLIC (Platform Level Interrupt Controller)
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "hw/sysbus.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/riscv_htif.h"
#include "hw/riscv/riscv_hart.h"
#include "hw/riscv/sifive_clint.h"
#include "hw/riscv/spike.h"
#include "hw/riscv/boot.h"
#include "chardev/char.h"
#include "sysemu/arch_init.h"
#include "sysemu/device_tree.h"
#include "sysemu/qtest.h"
#include "sysemu/sysemu.h"
#include "exec/address-spaces.h"
#include <libfdt.h>
static const struct MemmapEntry {
hwaddr base;
hwaddr size;
} spike_memmap[] = {
[SPIKE_MROM] = { 0x1000, 0x11000 },
[SPIKE_CLINT] = { 0x2000000, 0x10000 },
[SPIKE_DRAM] = { 0x80000000, 0x0 },
};
static void create_fdt(SpikeState *s, const struct MemmapEntry *memmap,
uint64_t mem_size, const char *cmdline)
{
void *fdt;
int cpu;
uint32_t *cells;
char *nodename;
fdt = s->fdt = create_device_tree(&s->fdt_size);
if (!fdt) {
error_report("create_device_tree() failed");
exit(1);
}
qemu_fdt_setprop_string(fdt, "/", "model", "ucbbar,spike-bare,qemu");
qemu_fdt_setprop_string(fdt, "/", "compatible", "ucbbar,spike-bare-dev");
qemu_fdt_setprop_cell(fdt, "/", "#size-cells", 0x2);
qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 0x2);
qemu_fdt_add_subnode(fdt, "/htif");
qemu_fdt_setprop_string(fdt, "/htif", "compatible", "ucb,htif0");
qemu_fdt_add_subnode(fdt, "/soc");
qemu_fdt_setprop(fdt, "/soc", "ranges", NULL, 0);
qemu_fdt_setprop_string(fdt, "/soc", "compatible", "simple-bus");
qemu_fdt_setprop_cell(fdt, "/soc", "#size-cells", 0x2);
qemu_fdt_setprop_cell(fdt, "/soc", "#address-cells", 0x2);
nodename = g_strdup_printf("/memory@%lx",
(long)memmap[SPIKE_DRAM].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_cells(fdt, nodename, "reg",
memmap[SPIKE_DRAM].base >> 32, memmap[SPIKE_DRAM].base,
mem_size >> 32, mem_size);
qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
g_free(nodename);
qemu_fdt_add_subnode(fdt, "/cpus");
qemu_fdt_setprop_cell(fdt, "/cpus", "timebase-frequency",
SIFIVE_CLINT_TIMEBASE_FREQ);
qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0);
qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1);
for (cpu = s->soc.num_harts - 1; cpu >= 0; cpu--) {
nodename = g_strdup_printf("/cpus/cpu@%d", cpu);
char *intc = g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
char *isa = riscv_isa_string(&s->soc.harts[cpu]);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "mmu-type", "riscv,sv48");
qemu_fdt_setprop_string(fdt, nodename, "riscv,isa", isa);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv");
qemu_fdt_setprop_string(fdt, nodename, "status", "okay");
qemu_fdt_setprop_cell(fdt, nodename, "reg", cpu);
qemu_fdt_setprop_string(fdt, nodename, "device_type", "cpu");
qemu_fdt_add_subnode(fdt, intc);
qemu_fdt_setprop_cell(fdt, intc, "phandle", 1);
qemu_fdt_setprop_string(fdt, intc, "compatible", "riscv,cpu-intc");
qemu_fdt_setprop(fdt, intc, "interrupt-controller", NULL, 0);
qemu_fdt_setprop_cell(fdt, intc, "#interrupt-cells", 1);
g_free(isa);
g_free(intc);
g_free(nodename);
}
cells = g_new0(uint32_t, s->soc.num_harts * 4);
for (cpu = 0; cpu < s->soc.num_harts; cpu++) {
nodename =
g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
uint32_t intc_phandle = qemu_fdt_get_phandle(fdt, nodename);
cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_SOFT);
cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 3] = cpu_to_be32(IRQ_M_TIMER);
g_free(nodename);
}
nodename = g_strdup_printf("/soc/clint@%lx",
(long)memmap[SPIKE_CLINT].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,clint0");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[SPIKE_CLINT].base,
0x0, memmap[SPIKE_CLINT].size);
qemu_fdt_setprop(fdt, nodename, "interrupts-extended",
cells, s->soc.num_harts * sizeof(uint32_t) * 4);
g_free(cells);
g_free(nodename);
if (cmdline) {
qemu_fdt_add_subnode(fdt, "/chosen");
qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
}
}
static void spike_board_init(MachineState *machine)
{
const struct MemmapEntry *memmap = spike_memmap;
SpikeState *s = g_new0(SpikeState, 1);
MemoryRegion *system_memory = get_system_memory();
MemoryRegion *main_mem = g_new(MemoryRegion, 1);
MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
int i;
unsigned int smp_cpus = machine->smp.cpus;
/* Initialize SOC */
object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
TYPE_RISCV_HART_ARRAY, &error_abort, NULL);
object_property_set_str(OBJECT(&s->soc), machine->cpu_type, "cpu-type",
&error_abort);
object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
&error_abort);
object_property_set_bool(OBJECT(&s->soc), true, "realized",
&error_abort);
/* register system main memory (actual RAM) */
memory_region_init_ram(main_mem, NULL, "riscv.spike.ram",
machine->ram_size, &error_fatal);
memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base,
main_mem);
/* create device tree */
create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline);
/* boot rom */
memory_region_init_rom(mask_rom, NULL, "riscv.spike.mrom",
memmap[SPIKE_MROM].size, &error_fatal);
memory_region_add_subregion(system_memory, memmap[SPIKE_MROM].base,
mask_rom);
if (machine->kernel_filename) {
riscv_load_kernel(machine->kernel_filename, htif_symbol_callback);
}
/* reset vector */
uint32_t reset_vec[8] = {
0x00000297, /* 1: auipc t0, %pcrel_hi(dtb) */
0x02028593, /* addi a1, t0, %pcrel_lo(1b) */
0xf1402573, /* csrr a0, mhartid */
#if defined(TARGET_RISCV32)
0x0182a283, /* lw t0, 24(t0) */
#elif defined(TARGET_RISCV64)
0x0182b283, /* ld t0, 24(t0) */
#endif
0x00028067, /* jr t0 */
0x00000000,
memmap[SPIKE_DRAM].base, /* start: .dword DRAM_BASE */
0x00000000,
/* dtb: */
};
/* copy in the reset vector in little_endian byte order */
for (i = 0; i < sizeof(reset_vec) >> 2; i++) {
reset_vec[i] = cpu_to_le32(reset_vec[i]);
}
rom_add_blob_fixed_as("mrom.reset", reset_vec, sizeof(reset_vec),
memmap[SPIKE_MROM].base, &address_space_memory);
/* copy in the device tree */
if (fdt_pack(s->fdt) || fdt_totalsize(s->fdt) >
memmap[SPIKE_MROM].size - sizeof(reset_vec)) {
error_report("not enough space to store device-tree");
exit(1);
}
qemu_fdt_dumpdtb(s->fdt, fdt_totalsize(s->fdt));
rom_add_blob_fixed_as("mrom.fdt", s->fdt, fdt_totalsize(s->fdt),
memmap[SPIKE_MROM].base + sizeof(reset_vec),
&address_space_memory);
/* initialize HTIF using symbols found in load_kernel */
htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0));
/* Core Local Interruptor (timer and IPI) */
sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
false);
}
static void spike_v1_10_0_board_init(MachineState *machine)
{
const struct MemmapEntry *memmap = spike_memmap;
SpikeState *s = g_new0(SpikeState, 1);
MemoryRegion *system_memory = get_system_memory();
MemoryRegion *main_mem = g_new(MemoryRegion, 1);
MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
int i;
unsigned int smp_cpus = machine->smp.cpus;
if (!qtest_enabled()) {
info_report("The Spike v1.10.0 machine has been deprecated. "
"Please use the generic spike machine and specify the ISA "
"versions using -cpu.");
}
/* Initialize SOC */
object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
TYPE_RISCV_HART_ARRAY, &error_abort, NULL);
object_property_set_str(OBJECT(&s->soc), SPIKE_V1_10_0_CPU, "cpu-type",
&error_abort);
object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
&error_abort);
object_property_set_bool(OBJECT(&s->soc), true, "realized",
&error_abort);
/* register system main memory (actual RAM) */
memory_region_init_ram(main_mem, NULL, "riscv.spike.ram",
machine->ram_size, &error_fatal);
memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base,
main_mem);
/* create device tree */
create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline);
/* boot rom */
memory_region_init_rom(mask_rom, NULL, "riscv.spike.mrom",
memmap[SPIKE_MROM].size, &error_fatal);
memory_region_add_subregion(system_memory, memmap[SPIKE_MROM].base,
mask_rom);
if (machine->kernel_filename) {
riscv_load_kernel(machine->kernel_filename, htif_symbol_callback);
}
/* reset vector */
uint32_t reset_vec[8] = {
0x00000297, /* 1: auipc t0, %pcrel_hi(dtb) */
0x02028593, /* addi a1, t0, %pcrel_lo(1b) */
0xf1402573, /* csrr a0, mhartid */
#if defined(TARGET_RISCV32)
0x0182a283, /* lw t0, 24(t0) */
#elif defined(TARGET_RISCV64)
0x0182b283, /* ld t0, 24(t0) */
#endif
0x00028067, /* jr t0 */
0x00000000,
memmap[SPIKE_DRAM].base, /* start: .dword DRAM_BASE */
0x00000000,
/* dtb: */
};
/* copy in the reset vector in little_endian byte order */
for (i = 0; i < sizeof(reset_vec) >> 2; i++) {
reset_vec[i] = cpu_to_le32(reset_vec[i]);
}
rom_add_blob_fixed_as("mrom.reset", reset_vec, sizeof(reset_vec),
memmap[SPIKE_MROM].base, &address_space_memory);
/* copy in the device tree */
if (fdt_pack(s->fdt) || fdt_totalsize(s->fdt) >
memmap[SPIKE_MROM].size - sizeof(reset_vec)) {
error_report("not enough space to store device-tree");
exit(1);
}
qemu_fdt_dumpdtb(s->fdt, fdt_totalsize(s->fdt));
rom_add_blob_fixed_as("mrom.fdt", s->fdt, fdt_totalsize(s->fdt),
memmap[SPIKE_MROM].base + sizeof(reset_vec),
&address_space_memory);
/* initialize HTIF using symbols found in load_kernel */
htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0));
/* Core Local Interruptor (timer and IPI) */
sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
false);
}
static void spike_v1_09_1_board_init(MachineState *machine)
{
const struct MemmapEntry *memmap = spike_memmap;
SpikeState *s = g_new0(SpikeState, 1);
MemoryRegion *system_memory = get_system_memory();
MemoryRegion *main_mem = g_new(MemoryRegion, 1);
MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
int i;
unsigned int smp_cpus = machine->smp.cpus;
if (!qtest_enabled()) {
info_report("The Spike v1.09.1 machine has been deprecated. "
"Please use the generic spike machine and specify the ISA "
"versions using -cpu.");
}
/* Initialize SOC */
object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
TYPE_RISCV_HART_ARRAY, &error_abort, NULL);
object_property_set_str(OBJECT(&s->soc), SPIKE_V1_09_1_CPU, "cpu-type",
&error_abort);
object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
&error_abort);
object_property_set_bool(OBJECT(&s->soc), true, "realized",
&error_abort);
/* register system main memory (actual RAM) */
memory_region_init_ram(main_mem, NULL, "riscv.spike.ram",
machine->ram_size, &error_fatal);
memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base,
main_mem);
/* boot rom */
memory_region_init_rom(mask_rom, NULL, "riscv.spike.mrom",
memmap[SPIKE_MROM].size, &error_fatal);
memory_region_add_subregion(system_memory, memmap[SPIKE_MROM].base,
mask_rom);
if (machine->kernel_filename) {
riscv_load_kernel(machine->kernel_filename, htif_symbol_callback);
}
/* reset vector */
uint32_t reset_vec[8] = {
0x297 + memmap[SPIKE_DRAM].base - memmap[SPIKE_MROM].base, /* lui */
0x00028067, /* jump to DRAM_BASE */
0x00000000, /* reserved */
memmap[SPIKE_MROM].base + sizeof(reset_vec), /* config string pointer */
0, 0, 0, 0 /* trap vector */
};
/* part one of config string - before memory size specified */
const char *config_string_tmpl =
"platform {\n"
" vendor ucb;\n"
" arch spike;\n"
"};\n"
"rtc {\n"
" addr 0x%" PRIx64 "x;\n"
"};\n"
"ram {\n"
" 0 {\n"
" addr 0x%" PRIx64 "x;\n"
" size 0x%" PRIx64 "x;\n"
" };\n"
"};\n"
"core {\n"
" 0" " {\n"
" " "0 {\n"
" isa %s;\n"
" timecmp 0x%" PRIx64 "x;\n"
" ipi 0x%" PRIx64 "x;\n"
" };\n"
" };\n"
"};\n";
/* build config string with supplied memory size */
char *isa = riscv_isa_string(&s->soc.harts[0]);
char *config_string = g_strdup_printf(config_string_tmpl,
(uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_TIME_BASE,
(uint64_t)memmap[SPIKE_DRAM].base,
(uint64_t)ram_size, isa,
(uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_TIMECMP_BASE,
(uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_SIP_BASE);
g_free(isa);
size_t config_string_len = strlen(config_string);
/* copy in the reset vector in little_endian byte order */
for (i = 0; i < sizeof(reset_vec) >> 2; i++) {
reset_vec[i] = cpu_to_le32(reset_vec[i]);
}
rom_add_blob_fixed_as("mrom.reset", reset_vec, sizeof(reset_vec),
memmap[SPIKE_MROM].base, &address_space_memory);
/* copy in the config string */
rom_add_blob_fixed_as("mrom.reset", config_string, config_string_len,
memmap[SPIKE_MROM].base + sizeof(reset_vec),
&address_space_memory);
/* initialize HTIF using symbols found in load_kernel */
htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0));
/* Core Local Interruptor (timer and IPI) */
sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
false);
g_free(config_string);
}
static void spike_v1_09_1_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V Spike Board (Privileged ISA v1.9.1)";
mc->init = spike_v1_09_1_board_init;
mc->max_cpus = 1;
}
static void spike_v1_10_0_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V Spike Board (Privileged ISA v1.10)";
mc->init = spike_v1_10_0_board_init;
mc->max_cpus = 1;
}
static void spike_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V Spike Board";
mc->init = spike_board_init;
mc->max_cpus = 1;
mc->is_default = true;
mc->default_cpu_type = SPIKE_V1_10_0_CPU;
}
DEFINE_MACHINE("spike_v1.9.1", spike_v1_09_1_machine_init)
DEFINE_MACHINE("spike_v1.10", spike_v1_10_0_machine_init)
DEFINE_MACHINE("spike", spike_machine_init)
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