This patch implements a floating-interrupt controller device (flic) which interacts with the s390 flic kvm_device. Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
306 lines
8.1 KiB
C
306 lines
8.1 KiB
C
/*
|
|
* QEMU S390 virtio target
|
|
*
|
|
* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
|
|
* Copyright IBM Corp 2012
|
|
*
|
|
* 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.
|
|
*
|
|
* Contributions after 2012-10-29 are licensed under the terms of the
|
|
* GNU GPL, version 2 or (at your option) any later version.
|
|
*
|
|
* 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 "hw/hw.h"
|
|
#include "block/block.h"
|
|
#include "sysemu/blockdev.h"
|
|
#include "sysemu/sysemu.h"
|
|
#include "net/net.h"
|
|
#include "hw/boards.h"
|
|
#include "monitor/monitor.h"
|
|
#include "hw/loader.h"
|
|
#include "hw/virtio/virtio.h"
|
|
#include "hw/sysbus.h"
|
|
#include "sysemu/kvm.h"
|
|
#include "exec/address-spaces.h"
|
|
|
|
#include "hw/s390x/s390-virtio-bus.h"
|
|
#include "hw/s390x/sclp.h"
|
|
#include "hw/s390x/s390_flic.h"
|
|
#include "hw/s390x/s390-virtio.h"
|
|
|
|
//#define DEBUG_S390
|
|
|
|
#ifdef DEBUG_S390
|
|
#define DPRINTF(fmt, ...) \
|
|
do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
|
|
#else
|
|
#define DPRINTF(fmt, ...) \
|
|
do { } while (0)
|
|
#endif
|
|
|
|
#define MAX_BLK_DEVS 10
|
|
#define ZIPL_FILENAME "s390-zipl.rom"
|
|
|
|
static VirtIOS390Bus *s390_bus;
|
|
static S390CPU **ipi_states;
|
|
|
|
S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
|
|
{
|
|
if (cpu_addr >= smp_cpus) {
|
|
return NULL;
|
|
}
|
|
|
|
return ipi_states[cpu_addr];
|
|
}
|
|
|
|
static int s390_virtio_hcall_notify(const uint64_t *args)
|
|
{
|
|
uint64_t mem = args[0];
|
|
int r = 0, i;
|
|
|
|
if (mem > ram_size) {
|
|
VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus, mem, &i);
|
|
if (dev) {
|
|
virtio_queue_notify(dev->vdev, i);
|
|
} else {
|
|
r = -EINVAL;
|
|
}
|
|
} else {
|
|
/* Early printk */
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static int s390_virtio_hcall_reset(const uint64_t *args)
|
|
{
|
|
uint64_t mem = args[0];
|
|
VirtIOS390Device *dev;
|
|
|
|
dev = s390_virtio_bus_find_mem(s390_bus, mem);
|
|
if (dev == NULL) {
|
|
return -EINVAL;
|
|
}
|
|
virtio_reset(dev->vdev);
|
|
stb_phys(&address_space_memory, dev->dev_offs + VIRTIO_DEV_OFFS_STATUS, 0);
|
|
s390_virtio_device_sync(dev);
|
|
s390_virtio_reset_idx(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s390_virtio_hcall_set_status(const uint64_t *args)
|
|
{
|
|
uint64_t mem = args[0];
|
|
int r = 0;
|
|
VirtIOS390Device *dev;
|
|
|
|
dev = s390_virtio_bus_find_mem(s390_bus, mem);
|
|
if (dev) {
|
|
s390_virtio_device_update_status(dev);
|
|
} else {
|
|
r = -EINVAL;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static void s390_virtio_register_hcalls(void)
|
|
{
|
|
s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
|
|
s390_virtio_hcall_notify);
|
|
s390_register_virtio_hypercall(KVM_S390_VIRTIO_RESET,
|
|
s390_virtio_hcall_reset);
|
|
s390_register_virtio_hypercall(KVM_S390_VIRTIO_SET_STATUS,
|
|
s390_virtio_hcall_set_status);
|
|
}
|
|
|
|
/*
|
|
* The number of running CPUs. On s390 a shutdown is the state of all CPUs
|
|
* being either stopped or disabled (for interrupts) waiting. We have to
|
|
* track this number to call the shutdown sequence accordingly. This
|
|
* number is modified either on startup or while holding the big qemu lock.
|
|
*/
|
|
static unsigned s390_running_cpus;
|
|
|
|
void s390_add_running_cpu(S390CPU *cpu)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
CPUS390XState *env = &cpu->env;
|
|
|
|
if (cs->halted) {
|
|
s390_running_cpus++;
|
|
cs->halted = 0;
|
|
env->exception_index = -1;
|
|
}
|
|
}
|
|
|
|
unsigned s390_del_running_cpu(S390CPU *cpu)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
CPUS390XState *env = &cpu->env;
|
|
|
|
if (cs->halted == 0) {
|
|
assert(s390_running_cpus >= 1);
|
|
s390_running_cpus--;
|
|
cs->halted = 1;
|
|
env->exception_index = EXCP_HLT;
|
|
}
|
|
return s390_running_cpus;
|
|
}
|
|
|
|
void s390_init_ipl_dev(const char *kernel_filename,
|
|
const char *kernel_cmdline,
|
|
const char *initrd_filename,
|
|
const char *firmware)
|
|
{
|
|
DeviceState *dev;
|
|
|
|
dev = qdev_create(NULL, "s390-ipl");
|
|
if (kernel_filename) {
|
|
qdev_prop_set_string(dev, "kernel", kernel_filename);
|
|
}
|
|
if (initrd_filename) {
|
|
qdev_prop_set_string(dev, "initrd", initrd_filename);
|
|
}
|
|
qdev_prop_set_string(dev, "cmdline", kernel_cmdline);
|
|
qdev_prop_set_string(dev, "firmware", firmware);
|
|
qdev_init_nofail(dev);
|
|
}
|
|
|
|
void s390_init_cpus(const char *cpu_model, uint8_t *storage_keys)
|
|
{
|
|
int i;
|
|
|
|
if (cpu_model == NULL) {
|
|
cpu_model = "host";
|
|
}
|
|
|
|
ipi_states = g_malloc(sizeof(S390CPU *) * smp_cpus);
|
|
|
|
for (i = 0; i < smp_cpus; i++) {
|
|
S390CPU *cpu;
|
|
CPUState *cs;
|
|
|
|
cpu = cpu_s390x_init(cpu_model);
|
|
cs = CPU(cpu);
|
|
|
|
ipi_states[i] = cpu;
|
|
cs->halted = 1;
|
|
cpu->env.exception_index = EXCP_HLT;
|
|
cpu->env.storage_keys = storage_keys;
|
|
}
|
|
}
|
|
|
|
|
|
void s390_create_virtio_net(BusState *bus, const char *name)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nb_nics; i++) {
|
|
NICInfo *nd = &nd_table[i];
|
|
DeviceState *dev;
|
|
|
|
if (!nd->model) {
|
|
nd->model = g_strdup("virtio");
|
|
}
|
|
|
|
if (strcmp(nd->model, "virtio")) {
|
|
fprintf(stderr, "S390 only supports VirtIO nics\n");
|
|
exit(1);
|
|
}
|
|
|
|
dev = qdev_create(bus, name);
|
|
qdev_set_nic_properties(dev, nd);
|
|
qdev_init_nofail(dev);
|
|
}
|
|
}
|
|
|
|
/* PC hardware initialisation */
|
|
static void s390_init(QEMUMachineInitArgs *args)
|
|
{
|
|
ram_addr_t my_ram_size = args->ram_size;
|
|
MemoryRegion *sysmem = get_system_memory();
|
|
MemoryRegion *ram = g_new(MemoryRegion, 1);
|
|
int shift = 0;
|
|
uint8_t *storage_keys;
|
|
void *virtio_region;
|
|
hwaddr virtio_region_len;
|
|
hwaddr virtio_region_start;
|
|
|
|
/* s390x ram size detection needs a 16bit multiplier + an increment. So
|
|
guests > 64GB can be specified in 2MB steps etc. */
|
|
while ((my_ram_size >> (20 + shift)) > 65535) {
|
|
shift++;
|
|
}
|
|
my_ram_size = my_ram_size >> (20 + shift) << (20 + shift);
|
|
|
|
/* let's propagate the changed ram size into the global variable. */
|
|
ram_size = my_ram_size;
|
|
|
|
/* get a BUS */
|
|
s390_bus = s390_virtio_bus_init(&my_ram_size);
|
|
s390_sclp_init();
|
|
s390_init_ipl_dev(args->kernel_filename, args->kernel_cmdline,
|
|
args->initrd_filename, ZIPL_FILENAME);
|
|
s390_flic_init();
|
|
|
|
/* register hypercalls */
|
|
s390_virtio_register_hcalls();
|
|
|
|
/* allocate RAM */
|
|
memory_region_init_ram(ram, NULL, "s390.ram", my_ram_size);
|
|
vmstate_register_ram_global(ram);
|
|
memory_region_add_subregion(sysmem, 0, ram);
|
|
|
|
/* clear virtio region */
|
|
virtio_region_len = my_ram_size - ram_size;
|
|
virtio_region_start = ram_size;
|
|
virtio_region = cpu_physical_memory_map(virtio_region_start,
|
|
&virtio_region_len, true);
|
|
memset(virtio_region, 0, virtio_region_len);
|
|
cpu_physical_memory_unmap(virtio_region, virtio_region_len, 1,
|
|
virtio_region_len);
|
|
|
|
/* allocate storage keys */
|
|
storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE);
|
|
|
|
/* init CPUs */
|
|
s390_init_cpus(args->cpu_model, storage_keys);
|
|
|
|
/* Create VirtIO network adapters */
|
|
s390_create_virtio_net((BusState *)s390_bus, "virtio-net-s390");
|
|
}
|
|
|
|
static QEMUMachine s390_machine = {
|
|
.name = "s390-virtio",
|
|
.alias = "s390",
|
|
.desc = "VirtIO based S390 machine",
|
|
.init = s390_init,
|
|
.block_default_type = IF_VIRTIO,
|
|
.no_cdrom = 1,
|
|
.no_floppy = 1,
|
|
.no_serial = 1,
|
|
.no_parallel = 1,
|
|
.no_sdcard = 1,
|
|
.use_virtcon = 1,
|
|
.max_cpus = 255,
|
|
.is_default = 1,
|
|
};
|
|
|
|
static void s390_machine_init(void)
|
|
{
|
|
qemu_register_machine(&s390_machine);
|
|
}
|
|
|
|
machine_init(s390_machine_init);
|