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qemu/hw/ppc/pnv.c
Cédric Le Goater 631adaff31 ppc/pnv: add a PIR handler to PnvChip 
The Processor Identification Register (PIR) is a register that holds a
processor identifier which is used for bus transactions (XSCOM) and
for processor differentiation in multiprocessor systems. It also used
in the interrupt vector entries (IVE) to identify the thread serving
the interrupts.

P9 and P8 have some differences in the CPU PIR encoding.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2016-10-28 09:38:25 +11:00

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/*
* QEMU PowerPC PowerNV machine model
*
* Copyright (c) 2016, IBM Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "sysemu/sysemu.h"
#include "sysemu/numa.h"
#include "hw/hw.h"
#include "target-ppc/cpu.h"
#include "qemu/log.h"
#include "hw/ppc/fdt.h"
#include "hw/ppc/ppc.h"
#include "hw/ppc/pnv.h"
#include "hw/loader.h"
#include "exec/address-spaces.h"
#include "qemu/cutils.h"
#include "qapi/visitor.h"
#include <libfdt.h>
#define FDT_MAX_SIZE 0x00100000
#define FW_FILE_NAME "skiboot.lid"
#define FW_LOAD_ADDR 0x0
#define FW_MAX_SIZE 0x00400000
#define KERNEL_LOAD_ADDR 0x20000000
#define INITRD_LOAD_ADDR 0x40000000
/*
* On Power Systems E880 (POWER8), the max cpus (threads) should be :
* 4 * 4 sockets * 12 cores * 8 threads = 1536
* Let's make it 2^11
*/
#define MAX_CPUS 2048
/*
* Memory nodes are created by hostboot, one for each range of memory
* that has a different "affinity". In practice, it means one range
* per chip.
*/
static void powernv_populate_memory_node(void *fdt, int chip_id, hwaddr start,
hwaddr size)
{
char *mem_name;
uint64_t mem_reg_property[2];
int off;
mem_reg_property[0] = cpu_to_be64(start);
mem_reg_property[1] = cpu_to_be64(size);
mem_name = g_strdup_printf("memory@%"HWADDR_PRIx, start);
off = fdt_add_subnode(fdt, 0, mem_name);
g_free(mem_name);
_FDT((fdt_setprop_string(fdt, off, "device_type", "memory")));
_FDT((fdt_setprop(fdt, off, "reg", mem_reg_property,
sizeof(mem_reg_property))));
_FDT((fdt_setprop_cell(fdt, off, "ibm,chip-id", chip_id)));
}
static void powernv_populate_chip(PnvChip *chip, void *fdt)
{
if (chip->ram_size) {
powernv_populate_memory_node(fdt, chip->chip_id, chip->ram_start,
chip->ram_size);
}
}
static void *powernv_create_fdt(MachineState *machine)
{
const char plat_compat[] = "qemu,powernv\0ibm,powernv";
PnvMachineState *pnv = POWERNV_MACHINE(machine);
void *fdt;
char *buf;
int off;
int i;
fdt = g_malloc0(FDT_MAX_SIZE);
_FDT((fdt_create_empty_tree(fdt, FDT_MAX_SIZE)));
/* Root node */
_FDT((fdt_setprop_cell(fdt, 0, "#address-cells", 0x2)));
_FDT((fdt_setprop_cell(fdt, 0, "#size-cells", 0x2)));
_FDT((fdt_setprop_string(fdt, 0, "model",
"IBM PowerNV (emulated by qemu)")));
_FDT((fdt_setprop(fdt, 0, "compatible", plat_compat,
sizeof(plat_compat))));
buf = qemu_uuid_unparse_strdup(&qemu_uuid);
_FDT((fdt_setprop_string(fdt, 0, "vm,uuid", buf)));
if (qemu_uuid_set) {
_FDT((fdt_property_string(fdt, "system-id", buf)));
}
g_free(buf);
off = fdt_add_subnode(fdt, 0, "chosen");
if (machine->kernel_cmdline) {
_FDT((fdt_setprop_string(fdt, off, "bootargs",
machine->kernel_cmdline)));
}
if (pnv->initrd_size) {
uint32_t start_prop = cpu_to_be32(pnv->initrd_base);
uint32_t end_prop = cpu_to_be32(pnv->initrd_base + pnv->initrd_size);
_FDT((fdt_setprop(fdt, off, "linux,initrd-start",
&start_prop, sizeof(start_prop))));
_FDT((fdt_setprop(fdt, off, "linux,initrd-end",
&end_prop, sizeof(end_prop))));
}
/* Populate device tree for each chip */
for (i = 0; i < pnv->num_chips; i++) {
powernv_populate_chip(pnv->chips[i], fdt);
}
return fdt;
}
static void ppc_powernv_reset(void)
{
MachineState *machine = MACHINE(qdev_get_machine());
void *fdt;
qemu_devices_reset();
fdt = powernv_create_fdt(machine);
/* Pack resulting tree */
_FDT((fdt_pack(fdt)));
cpu_physical_memory_write(PNV_FDT_ADDR, fdt, fdt_totalsize(fdt));
}
static void ppc_powernv_init(MachineState *machine)
{
PnvMachineState *pnv = POWERNV_MACHINE(machine);
MemoryRegion *ram;
char *fw_filename;
long fw_size;
int i;
char *chip_typename;
/* allocate RAM */
if (machine->ram_size < (1 * G_BYTE)) {
error_report("Warning: skiboot may not work with < 1GB of RAM");
}
ram = g_new(MemoryRegion, 1);
memory_region_allocate_system_memory(ram, NULL, "ppc_powernv.ram",
machine->ram_size);
memory_region_add_subregion(get_system_memory(), 0, ram);
/* load skiboot firmware */
if (bios_name == NULL) {
bios_name = FW_FILE_NAME;
}
fw_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
fw_size = load_image_targphys(fw_filename, FW_LOAD_ADDR, FW_MAX_SIZE);
if (fw_size < 0) {
hw_error("qemu: could not load OPAL '%s'\n", fw_filename);
exit(1);
}
g_free(fw_filename);
/* load kernel */
if (machine->kernel_filename) {
long kernel_size;
kernel_size = load_image_targphys(machine->kernel_filename,
KERNEL_LOAD_ADDR, 0x2000000);
if (kernel_size < 0) {
hw_error("qemu: could not load kernel'%s'\n",
machine->kernel_filename);
exit(1);
}
}
/* load initrd */
if (machine->initrd_filename) {
pnv->initrd_base = INITRD_LOAD_ADDR;
pnv->initrd_size = load_image_targphys(machine->initrd_filename,
pnv->initrd_base, 0x10000000); /* 128MB max */
if (pnv->initrd_size < 0) {
error_report("qemu: could not load initial ram disk '%s'",
machine->initrd_filename);
exit(1);
}
}
/* We need some cpu model to instantiate the PnvChip class */
if (machine->cpu_model == NULL) {
machine->cpu_model = "POWER8";
}
/* Create the processor chips */
chip_typename = g_strdup_printf(TYPE_PNV_CHIP "-%s", machine->cpu_model);
if (!object_class_by_name(chip_typename)) {
error_report("qemu: invalid CPU model '%s' for %s machine",
machine->cpu_model, MACHINE_GET_CLASS(machine)->name);
exit(1);
}
pnv->chips = g_new0(PnvChip *, pnv->num_chips);
for (i = 0; i < pnv->num_chips; i++) {
char chip_name[32];
Object *chip = object_new(chip_typename);
pnv->chips[i] = PNV_CHIP(chip);
/* TODO: put all the memory in one node on chip 0 until we find a
* way to specify different ranges for each chip
*/
if (i == 0) {
object_property_set_int(chip, machine->ram_size, "ram-size",
&error_fatal);
}
snprintf(chip_name, sizeof(chip_name), "chip[%d]", PNV_CHIP_HWID(i));
object_property_add_child(OBJECT(pnv), chip_name, chip, &error_fatal);
object_property_set_int(chip, PNV_CHIP_HWID(i), "chip-id",
&error_fatal);
object_property_set_int(chip, smp_cores, "nr-cores", &error_fatal);
object_property_set_bool(chip, true, "realized", &error_fatal);
}
g_free(chip_typename);
}
/*
* 0:21 Reserved - Read as zeros
* 22:24 Chip ID
* 25:28 Core number
* 29:31 Thread ID
*/
static uint32_t pnv_chip_core_pir_p8(PnvChip *chip, uint32_t core_id)
{
return (chip->chip_id << 7) | (core_id << 3);
}
/*
* 0:48 Reserved - Read as zeroes
* 49:52 Node ID
* 53:55 Chip ID
* 56 Reserved - Read as zero
* 57:61 Core number
* 62:63 Thread ID
*
* We only care about the lower bits. uint32_t is fine for the moment.
*/
static uint32_t pnv_chip_core_pir_p9(PnvChip *chip, uint32_t core_id)
{
return (chip->chip_id << 8) | (core_id << 2);
}
/* Allowed core identifiers on a POWER8 Processor Chip :
*
* <EX0 reserved>
* EX1 - Venice only
* EX2 - Venice only
* EX3 - Venice only
* EX4
* EX5
* EX6
* <EX7,8 reserved> <reserved>
* EX9 - Venice only
* EX10 - Venice only
* EX11 - Venice only
* EX12
* EX13
* EX14
* <EX15 reserved>
*/
#define POWER8E_CORE_MASK (0x7070ull)
#define POWER8_CORE_MASK (0x7e7eull)
/*
* POWER9 has 24 cores, ids starting at 0x20
*/
#define POWER9_CORE_MASK (0xffffff00000000ull)
static void pnv_chip_power8e_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PnvChipClass *k = PNV_CHIP_CLASS(klass);
k->cpu_model = "POWER8E";
k->chip_type = PNV_CHIP_POWER8E;
k->chip_cfam_id = 0x221ef04980000000ull; /* P8 Murano DD2.1 */
k->cores_mask = POWER8E_CORE_MASK;
k->core_pir = pnv_chip_core_pir_p8;
dc->desc = "PowerNV Chip POWER8E";
}
static const TypeInfo pnv_chip_power8e_info = {
.name = TYPE_PNV_CHIP_POWER8E,
.parent = TYPE_PNV_CHIP,
.instance_size = sizeof(PnvChip),
.class_init = pnv_chip_power8e_class_init,
};
static void pnv_chip_power8_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PnvChipClass *k = PNV_CHIP_CLASS(klass);
k->cpu_model = "POWER8";
k->chip_type = PNV_CHIP_POWER8;
k->chip_cfam_id = 0x220ea04980000000ull; /* P8 Venice DD2.0 */
k->cores_mask = POWER8_CORE_MASK;
k->core_pir = pnv_chip_core_pir_p8;
dc->desc = "PowerNV Chip POWER8";
}
static const TypeInfo pnv_chip_power8_info = {
.name = TYPE_PNV_CHIP_POWER8,
.parent = TYPE_PNV_CHIP,
.instance_size = sizeof(PnvChip),
.class_init = pnv_chip_power8_class_init,
};
static void pnv_chip_power8nvl_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PnvChipClass *k = PNV_CHIP_CLASS(klass);
k->cpu_model = "POWER8NVL";
k->chip_type = PNV_CHIP_POWER8NVL;
k->chip_cfam_id = 0x120d304980000000ull; /* P8 Naples DD1.0 */
k->cores_mask = POWER8_CORE_MASK;
k->core_pir = pnv_chip_core_pir_p8;
dc->desc = "PowerNV Chip POWER8NVL";
}
static const TypeInfo pnv_chip_power8nvl_info = {
.name = TYPE_PNV_CHIP_POWER8NVL,
.parent = TYPE_PNV_CHIP,
.instance_size = sizeof(PnvChip),
.class_init = pnv_chip_power8nvl_class_init,
};
static void pnv_chip_power9_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PnvChipClass *k = PNV_CHIP_CLASS(klass);
k->cpu_model = "POWER9";
k->chip_type = PNV_CHIP_POWER9;
k->chip_cfam_id = 0x100d104980000000ull; /* P9 Nimbus DD1.0 */
k->cores_mask = POWER9_CORE_MASK;
k->core_pir = pnv_chip_core_pir_p9;
dc->desc = "PowerNV Chip POWER9";
}
static const TypeInfo pnv_chip_power9_info = {
.name = TYPE_PNV_CHIP_POWER9,
.parent = TYPE_PNV_CHIP,
.instance_size = sizeof(PnvChip),
.class_init = pnv_chip_power9_class_init,
};
static void pnv_chip_core_sanitize(PnvChip *chip, Error **errp)
{
PnvChipClass *pcc = PNV_CHIP_GET_CLASS(chip);
int cores_max;
/*
* No custom mask for this chip, let's use the default one from *
* the chip class
*/
if (!chip->cores_mask) {
chip->cores_mask = pcc->cores_mask;
}
/* filter alien core ids ! some are reserved */
if ((chip->cores_mask & pcc->cores_mask) != chip->cores_mask) {
error_setg(errp, "warning: invalid core mask for chip Ox%"PRIx64" !",
chip->cores_mask);
return;
}
chip->cores_mask &= pcc->cores_mask;
/* now that we have a sane layout, let check the number of cores */
cores_max = hweight_long(chip->cores_mask);
if (chip->nr_cores > cores_max) {
error_setg(errp, "warning: too many cores for chip ! Limit is %d",
cores_max);
return;
}
}
static void pnv_chip_realize(DeviceState *dev, Error **errp)
{
PnvChip *chip = PNV_CHIP(dev);
Error *error = NULL;
/* Early checks on the core settings */
pnv_chip_core_sanitize(chip, &error);
if (error) {
error_propagate(errp, error);
return;
}
}
static Property pnv_chip_properties[] = {
DEFINE_PROP_UINT32("chip-id", PnvChip, chip_id, 0),
DEFINE_PROP_UINT64("ram-start", PnvChip, ram_start, 0),
DEFINE_PROP_UINT64("ram-size", PnvChip, ram_size, 0),
DEFINE_PROP_UINT32("nr-cores", PnvChip, nr_cores, 1),
DEFINE_PROP_UINT64("cores-mask", PnvChip, cores_mask, 0x0),
DEFINE_PROP_END_OF_LIST(),
};
static void pnv_chip_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = pnv_chip_realize;
dc->props = pnv_chip_properties;
dc->desc = "PowerNV Chip";
}
static const TypeInfo pnv_chip_info = {
.name = TYPE_PNV_CHIP,
.parent = TYPE_SYS_BUS_DEVICE,
.class_init = pnv_chip_class_init,
.class_size = sizeof(PnvChipClass),
.abstract = true,
};
static void pnv_get_num_chips(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
visit_type_uint32(v, name, &POWERNV_MACHINE(obj)->num_chips, errp);
}
static void pnv_set_num_chips(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
PnvMachineState *pnv = POWERNV_MACHINE(obj);
uint32_t num_chips;
Error *local_err = NULL;
visit_type_uint32(v, name, &num_chips, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
/*
* TODO: should we decide on how many chips we can create based
* on #cores and Venice vs. Murano vs. Naples chip type etc...,
*/
if (!is_power_of_2(num_chips) || num_chips > 4) {
error_setg(errp, "invalid number of chips: '%d'", num_chips);
return;
}
pnv->num_chips = num_chips;
}
static void powernv_machine_initfn(Object *obj)
{
PnvMachineState *pnv = POWERNV_MACHINE(obj);
pnv->num_chips = 1;
}
static void powernv_machine_class_props_init(ObjectClass *oc)
{
object_class_property_add(oc, "num-chips", "uint32_t",
pnv_get_num_chips, pnv_set_num_chips,
NULL, NULL, NULL);
object_class_property_set_description(oc, "num-chips",
"Specifies the number of processor chips",
NULL);
}
static void powernv_machine_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "IBM PowerNV (Non-Virtualized)";
mc->init = ppc_powernv_init;
mc->reset = ppc_powernv_reset;
mc->max_cpus = MAX_CPUS;
mc->block_default_type = IF_IDE; /* Pnv provides a AHCI device for
* storage */
mc->no_parallel = 1;
mc->default_boot_order = NULL;
mc->default_ram_size = 1 * G_BYTE;
powernv_machine_class_props_init(oc);
}
static const TypeInfo powernv_machine_info = {
.name = TYPE_POWERNV_MACHINE,
.parent = TYPE_MACHINE,
.instance_size = sizeof(PnvMachineState),
.instance_init = powernv_machine_initfn,
.class_init = powernv_machine_class_init,
};
static void powernv_machine_register_types(void)
{
type_register_static(&powernv_machine_info);
type_register_static(&pnv_chip_info);
type_register_static(&pnv_chip_power8e_info);
type_register_static(&pnv_chip_power8_info);
type_register_static(&pnv_chip_power8nvl_info);
type_register_static(&pnv_chip_power9_info);
}
type_init(powernv_machine_register_types)
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