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[Qemu-commits] [COMMIT 3e9627e] Hardware watchdog
|
From: |
Anthony Liguori |
|
Subject: |
[Qemu-commits] [COMMIT 3e9627e] Hardware watchdog |
|
Date: |
Fri, 01 May 2009 15:05:18 -0000 |
From: Richard W.M. Jones <address@hidden>
Here is an updated hardware watchdog patch, which should fix
everything that was raised about the previous version ...
Signed-off-by: Richard W.M. Jones <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>
diff --git a/Makefile.target b/Makefile.target
index 82ada5a..f735105 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -582,6 +582,10 @@ OBJS += pcnet.o
OBJS += rtl8139.o
OBJS += e1000.o
+# Generic watchdog support and some watchdog devices
+OBJS += watchdog.o
+OBJS += wdt_ib700.o wdt_i6300esb.o
+
ifeq ($(TARGET_BASE_ARCH), i386)
# Hardware support
OBJS+= ide.o pckbd.o vga.o $(SOUND_HW) dma.o
diff --git a/hw/pc.c b/hw/pc.c
index 07b75f3..340b313 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -37,6 +37,7 @@
#include "virtio-balloon.h"
#include "virtio-console.h"
#include "hpet_emul.h"
+#include "watchdog.h"
#include "smbios.h"
/* output Bochs bios info messages */
@@ -1023,6 +1024,8 @@ static void pc_init1(ram_addr_t ram_size, int
vga_ram_size,
}
}
+ watchdog_pc_init(pci_bus);
+
for(i = 0; i < nb_nics; i++) {
NICInfo *nd = &nd_table[i];
diff --git a/hw/watchdog.c b/hw/watchdog.c
new file mode 100644
index 0000000..c64868d
--- /dev/null
+++ b/hw/watchdog.c
@@ -0,0 +1,136 @@
+/*
+ * Virtual hardware watchdog.
+ *
+ * Copyright (C) 2009 Red Hat Inc.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ *
+ * By Richard W.M. Jones (address@hidden).
+ */
+
+#include "qemu-common.h"
+#include "sys-queue.h"
+#include "sysemu.h"
+#include "hw/watchdog.h"
+
+static LIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list;
+
+void watchdog_add_model(WatchdogTimerModel *model)
+{
+ LIST_INSERT_HEAD(&watchdog_list, model, entry);
+}
+
+/* Returns:
+ * 0 = continue
+ * 1 = exit program with error
+ * 2 = exit program without error
+ */
+int select_watchdog(const char *p)
+{
+ WatchdogTimerModel *model;
+
+ if (watchdog) {
+ fprintf(stderr,
+ "qemu: only one watchdog option may be given\n");
+ return 1;
+ }
+
+ /* -watchdog ? lists available devices and exits cleanly. */
+ if (strcmp(p, "?") == 0) {
+ LIST_FOREACH(model, &watchdog_list, entry) {
+ fprintf(stderr, "\t%s\t%s\n",
+ model->wdt_name, model->wdt_description);
+ }
+ return 2;
+ }
+
+ LIST_FOREACH(model, &watchdog_list, entry) {
+ if (strcasecmp(model->wdt_name, p) == 0) {
+ watchdog = model;
+ return 0;
+ }
+ }
+
+ fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n");
+ LIST_FOREACH(model, &watchdog_list, entry) {
+ fprintf(stderr, "\t%s\t%s\n",
+ model->wdt_name, model->wdt_description);
+ }
+ return 1;
+}
+
+int select_watchdog_action(const char *p)
+{
+ if (strcasecmp(p, "reset") == 0)
+ watchdog_action = WDT_RESET;
+ else if (strcasecmp(p, "shutdown") == 0)
+ watchdog_action = WDT_SHUTDOWN;
+ else if (strcasecmp(p, "poweroff") == 0)
+ watchdog_action = WDT_POWEROFF;
+ else if (strcasecmp(p, "pause") == 0)
+ watchdog_action = WDT_PAUSE;
+ else if (strcasecmp(p, "debug") == 0)
+ watchdog_action = WDT_DEBUG;
+ else if (strcasecmp(p, "none") == 0)
+ watchdog_action = WDT_NONE;
+ else
+ return -1;
+
+ return 0;
+}
+
+/* This actually performs the "action" once a watchdog has expired,
+ * ie. reboot, shutdown, exit, etc.
+ */
+void watchdog_perform_action(void)
+{
+ switch(watchdog_action) {
+ case WDT_RESET: /* same as 'system_reset' in monitor */
+ qemu_system_reset_request();
+ break;
+
+ case WDT_SHUTDOWN: /* same as 'system_powerdown' in monitor */
+ qemu_system_powerdown_request();
+ break;
+
+ case WDT_POWEROFF: /* same as 'quit' command in monitor */
+ exit(0);
+ break;
+
+ case WDT_PAUSE: /* same as 'stop' command in monitor */
+ vm_stop(0);
+ break;
+
+ case WDT_DEBUG:
+ fprintf(stderr, "watchdog: timer fired\n");
+ break;
+
+ case WDT_NONE:
+ break;
+ }
+}
+
+void watchdog_pc_init(PCIBus *pci_bus)
+{
+ if (watchdog)
+ watchdog->wdt_pc_init(pci_bus);
+}
+
+void register_watchdogs(void)
+{
+ wdt_ib700_init();
+ wdt_i6300esb_init();
+}
diff --git a/hw/watchdog.h b/hw/watchdog.h
new file mode 100644
index 0000000..c2b2b36
--- /dev/null
+++ b/hw/watchdog.h
@@ -0,0 +1,65 @@
+/*
+ * Virtual hardware watchdog.
+ *
+ * Copyright (C) 2009 Red Hat Inc.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ *
+ * By Richard W.M. Jones (address@hidden).
+ */
+
+#ifndef QEMU_WATCHDOG_H
+#define QEMU_WATCHDOG_H
+
+extern void wdt_i6300esb_init(void);
+extern void wdt_ib700_init(void);
+
+/* Possible values for action parameter. */
+#define WDT_RESET 1 /* Hard reset. */
+#define WDT_SHUTDOWN 2 /* Shutdown. */
+#define WDT_POWEROFF 3 /* Quit. */
+#define WDT_PAUSE 4 /* Pause. */
+#define WDT_DEBUG 5 /* Prints a message and continues running. */
+#define WDT_NONE 6 /* Do nothing. */
+
+struct WatchdogTimerModel {
+ LIST_ENTRY(WatchdogTimerModel) entry;
+
+ /* Short name of the device - used to select it on the command line. */
+ const char *wdt_name;
+ /* Longer description (eg. manufacturer and full model number). */
+ const char *wdt_description;
+
+ /* This callback should create/register the device. It is called
+ * indirectly from hw/pc.c when the virtual PC is being set up.
+ */
+ void (*wdt_pc_init)(PCIBus *pci_bus);
+};
+typedef struct WatchdogTimerModel WatchdogTimerModel;
+
+/* in vl.c */
+extern WatchdogTimerModel *watchdog;
+extern int watchdog_action;
+
+/* in hw/watchdog.c */
+extern int select_watchdog(const char *p);
+extern int select_watchdog_action(const char *action);
+extern void watchdog_add_model(WatchdogTimerModel *model);
+extern void watchdog_perform_action(void);
+extern void watchdog_pc_init(PCIBus *pci_bus);
+extern void register_watchdogs(void);
+
+#endif /* QEMU_WATCHDOG_H */
diff --git a/hw/wdt_i6300esb.c b/hw/wdt_i6300esb.c
new file mode 100644
index 0000000..f7ddea2
--- /dev/null
+++ b/hw/wdt_i6300esb.c
@@ -0,0 +1,470 @@
+/*
+ * Virtual hardware watchdog.
+ *
+ * Copyright (C) 2009 Red Hat Inc.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ *
+ * By Richard W.M. Jones (address@hidden).
+ */
+
+#include <inttypes.h>
+
+#include "qemu-common.h"
+#include "qemu-timer.h"
+#include "watchdog.h"
+#include "hw.h"
+#include "isa.h"
+#include "pc.h"
+#include "pci.h"
+
+/*#define I6300ESB_DEBUG 1*/
+
+#ifdef I6300ESB_DEBUG
+#define i6300esb_debug(fs,...) \
+ fprintf(stderr,"i6300esb: %s: "fs,__func__,##__VA_ARGS__)
+#else
+#define i6300esb_debug(fs,...)
+#endif
+
+#ifndef PCI_DEVICE_ID_INTEL_ESB_9
+#define PCI_DEVICE_ID_INTEL_ESB_9 0x25ab
+#endif
+
+/* PCI configuration registers */
+#define ESB_CONFIG_REG 0x60 /* Config register */
+#define ESB_LOCK_REG 0x68 /* WDT lock register */
+
+/* Memory mapped registers (offset from base address) */
+#define ESB_TIMER1_REG 0x00 /* Timer1 value after each reset */
+#define ESB_TIMER2_REG 0x04 /* Timer2 value after each reset */
+#define ESB_GINTSR_REG 0x08 /* General Interrupt Status Register */
+#define ESB_RELOAD_REG 0x0c /* Reload register */
+
+/* Lock register bits */
+#define ESB_WDT_FUNC (0x01 << 2) /* Watchdog functionality */
+#define ESB_WDT_ENABLE (0x01 << 1) /* Enable WDT */
+#define ESB_WDT_LOCK (0x01 << 0) /* Lock (nowayout) */
+
+/* Config register bits */
+#define ESB_WDT_REBOOT (0x01 << 5) /* Enable reboot on timeout */
+#define ESB_WDT_FREQ (0x01 << 2) /* Decrement frequency */
+#define ESB_WDT_INTTYPE (0x11 << 0) /* Interrupt type on timer1 timeout */
+
+/* Reload register bits */
+#define ESB_WDT_RELOAD (0x01 << 8) /* prevent timeout */
+
+/* Magic constants */
+#define ESB_UNLOCK1 0x80 /* Step 1 to unlock reset registers */
+#define ESB_UNLOCK2 0x86 /* Step 2 to unlock reset registers */
+
+/* Device state. */
+struct I6300State {
+ PCIDevice dev; /* PCI device state, must be first field. */
+
+ int reboot_enabled; /* "Reboot" on timer expiry. The real action
+ * performed depends on the -watchdog-action
+ * param passed on QEMU command line.
+ */
+ int clock_scale; /* Clock scale. */
+#define CLOCK_SCALE_1KHZ 0
+#define CLOCK_SCALE_1MHZ 1
+
+ int int_type; /* Interrupt type generated. */
+#define INT_TYPE_IRQ 0 /* APIC 1, INT 10 */
+#define INT_TYPE_SMI 2
+#define INT_TYPE_DISABLED 3
+
+ int free_run; /* If true, reload timer on expiry. */
+ int locked; /* If true, enabled field cannot be changed. */
+ int enabled; /* If true, watchdog is enabled. */
+
+ QEMUTimer *timer; /* The actual watchdog timer. */
+
+ uint32_t timer1_preload; /* Values preloaded into timer1, timer2. */
+ uint32_t timer2_preload;
+ int stage; /* Stage (1 or 2). */
+
+ int unlock_state; /* Guest writes 0x80, 0x86 to unlock the
+ * registers, and we transition through
+ * states 0 -> 1 -> 2 when this happens.
+ */
+
+ int previous_reboot_flag; /* If the watchdog caused the previous
+ * reboot, this flag will be set.
+ */
+};
+
+typedef struct I6300State I6300State;
+
+/* This function is called when the watchdog has either been enabled
+ * (hence it starts counting down) or has been keep-alived.
+ */
+static void i6300esb_restart_timer(I6300State *d, int stage)
+{
+ int64_t timeout;
+
+ if (!d->enabled)
+ return;
+
+ d->stage = stage;
+
+ if (d->stage <= 1)
+ timeout = d->timer1_preload;
+ else
+ timeout = d->timer2_preload;
+
+ if (d->clock_scale == CLOCK_SCALE_1KHZ)
+ timeout <<= 15;
+ else
+ timeout <<= 5;
+
+ /* Get the timeout in units of ticks_per_sec. */
+ timeout = ticks_per_sec * timeout / 33000000;
+
+ i6300esb_debug("stage %d, timeout %" PRIi64 "\n", d->stage, timeout);
+
+ qemu_mod_timer(d->timer, qemu_get_clock(vm_clock) + timeout);
+}
+
+/* This is called when the guest disables the watchdog. */
+static void i6300esb_disable_timer(I6300State *d)
+{
+ i6300esb_debug("timer disabled\n");
+
+ qemu_del_timer(d->timer);
+}
+
+static void i6300esb_reset(I6300State *d)
+{
+ /* XXX We should probably reset other parts of the state here,
+ * but we should also reset our state on general machine reset
+ * too. For now just disable the timer so it doesn't fire
+ * again after the reboot.
+ */
+ i6300esb_disable_timer(d);
+}
+
+/* This function is called when the watchdog expires. Note that
+ * the hardware has two timers, and so expiry happens in two stages.
+ * If d->stage == 1 then we perform the first stage action (usually,
+ * sending an interrupt) and then restart the timer again for the
+ * second stage. If the second stage expires then the watchdog
+ * really has run out.
+ */
+static void i6300esb_timer_expired(void *vp)
+{
+ I6300State *d = (I6300State *) vp;
+
+ i6300esb_debug("stage %d\n", d->stage);
+
+ if (d->stage == 1) {
+ /* What to do at the end of stage 1? */
+ switch (d->int_type) {
+ case INT_TYPE_IRQ:
+ fprintf(stderr, "i6300esb_timer_expired: I would send APIC 1 INT
10 here if I knew how (XXX)\n");
+ break;
+ case INT_TYPE_SMI:
+ fprintf(stderr, "i6300esb_timer_expired: I would send SMI here if
I knew how (XXX)\n");
+ break;
+ }
+
+ /* Start the second stage. */
+ i6300esb_restart_timer(d, 2);
+ } else {
+ /* Second stage expired, reboot for real. */
+ if (d->reboot_enabled) {
+ d->previous_reboot_flag = 1;
+ watchdog_perform_action(); /* This reboots, exits, etc */
+ i6300esb_reset(d);
+ }
+
+ /* In "free running mode" we start stage 1 again. */
+ if (d->free_run)
+ i6300esb_restart_timer(d, 1);
+ }
+}
+
+static void i6300esb_config_write(PCIDevice *dev, uint32_t addr,
+ uint32_t data, int len)
+{
+ I6300State *d = (I6300State *) dev;
+ int old;
+
+ i6300esb_debug("addr = %x, data = %x, len = %d\n", addr, data, len);
+
+ if (addr == ESB_CONFIG_REG && len == 2) {
+ d->reboot_enabled = (data & ESB_WDT_REBOOT) == 0;
+ d->clock_scale =
+ (data & ESB_WDT_FREQ) != 0 ? CLOCK_SCALE_1MHZ : CLOCK_SCALE_1KHZ;
+ d->int_type = (data & ESB_WDT_INTTYPE);
+ } else if (addr == ESB_LOCK_REG && len == 1) {
+ if (!d->locked) {
+ d->locked = (data & ESB_WDT_LOCK) != 0;
+ d->free_run = (data & ESB_WDT_FUNC) != 0;
+ old = d->enabled;
+ d->enabled = (data & ESB_WDT_ENABLE) != 0;
+ if (!old && d->enabled) /* Enabled transitioned from 0 -> 1 */
+ i6300esb_restart_timer(d, 1);
+ else if (!d->enabled)
+ i6300esb_disable_timer(d);
+ }
+ } else {
+ pci_default_write_config(dev, addr, data, len);
+ }
+}
+
+static uint32_t i6300esb_config_read(PCIDevice *dev, uint32_t addr, int len)
+{
+ I6300State *d = (I6300State *) dev;
+ uint32_t data;
+
+ i6300esb_debug ("addr = %x, len = %d\n", addr, len);
+
+ if (addr == ESB_CONFIG_REG && len == 2) {
+ data =
+ (d->reboot_enabled ? 0 : ESB_WDT_REBOOT) |
+ (d->clock_scale == CLOCK_SCALE_1MHZ ? ESB_WDT_FREQ : 0) |
+ d->int_type;
+ return data;
+ } else if (addr == ESB_LOCK_REG && len == 1) {
+ data =
+ (d->free_run ? ESB_WDT_FUNC : 0) |
+ (d->locked ? ESB_WDT_LOCK : 0) |
+ (d->enabled ? ESB_WDT_ENABLE : 0);
+ return data;
+ } else {
+ return pci_default_read_config(dev, addr, len);
+ }
+}
+
+static uint32_t i6300esb_mem_readb(void *vp, target_phys_addr_t addr)
+{
+ i6300esb_debug ("addr = %x\n", (int) addr);
+
+ return 0;
+}
+
+static uint32_t i6300esb_mem_readw(void *vp, target_phys_addr_t addr)
+{
+ uint32_t data = 0;
+ I6300State *d = (I6300State *) vp;
+
+ i6300esb_debug("addr = %x\n", (int) addr);
+
+ if (addr == 0xc) {
+ /* The previous reboot flag is really bit 9, but there is
+ * a bug in the Linux driver where it thinks it's bit 12.
+ * Set both.
+ */
+ data = d->previous_reboot_flag ? 0x1200 : 0;
+ }
+
+ return data;
+}
+
+static uint32_t i6300esb_mem_readl(void *vp, target_phys_addr_t addr)
+{
+ i6300esb_debug("addr = %x\n", (int) addr);
+
+ return 0;
+}
+
+static void i6300esb_mem_writeb(void *vp, target_phys_addr_t addr, uint32_t
val)
+{
+ I6300State *d = (I6300State *) vp;
+
+ i6300esb_debug("addr = %x, val = %x\n", (int) addr, val);
+
+ if (addr == 0xc && val == 0x80)
+ d->unlock_state = 1;
+ else if (addr == 0xc && val == 0x86 && d->unlock_state == 1)
+ d->unlock_state = 2;
+}
+
+static void i6300esb_mem_writew(void *vp, target_phys_addr_t addr, uint32_t
val)
+{
+ I6300State *d = (I6300State *) vp;
+
+ i6300esb_debug("addr = %x, val = %x\n", (int) addr, val);
+
+ if (addr == 0xc && val == 0x80)
+ d->unlock_state = 1;
+ else if (addr == 0xc && val == 0x86 && d->unlock_state == 1)
+ d->unlock_state = 2;
+ else {
+ if (d->unlock_state == 2) {
+ if (addr == 0xc) {
+ if ((val & 0x100) != 0)
+ /* This is the "ping" from the userspace watchdog in
+ * the guest ...
+ */
+ i6300esb_restart_timer(d, 1);
+
+ /* Setting bit 9 resets the previous reboot flag.
+ * There's a bug in the Linux driver where it sets
+ * bit 12 instead.
+ */
+ if ((val & 0x200) != 0 || (val & 0x1000) != 0) {
+ d->previous_reboot_flag = 0;
+ }
+ }
+
+ d->unlock_state = 0;
+ }
+ }
+}
+
+static void i6300esb_mem_writel(void *vp, target_phys_addr_t addr, uint32_t
val)
+{
+ I6300State *d = (I6300State *) vp;
+
+ i6300esb_debug ("addr = %x, val = %x\n", (int) addr, val);
+
+ if (addr == 0xc && val == 0x80)
+ d->unlock_state = 1;
+ else if (addr == 0xc && val == 0x86 && d->unlock_state == 1)
+ d->unlock_state = 2;
+ else {
+ if (d->unlock_state == 2) {
+ if (addr == 0)
+ d->timer1_preload = val & 0xfffff;
+ else if (addr == 4)
+ d->timer2_preload = val & 0xfffff;
+
+ d->unlock_state = 0;
+ }
+ }
+}
+
+static void i6300esb_map(PCIDevice *dev, int region_num,
+ uint32_t addr, uint32_t size, int type)
+{
+ static CPUReadMemoryFunc *mem_read[3] = {
+ i6300esb_mem_readb,
+ i6300esb_mem_readw,
+ i6300esb_mem_readl,
+ };
+ static CPUWriteMemoryFunc *mem_write[3] = {
+ i6300esb_mem_writeb,
+ i6300esb_mem_writew,
+ i6300esb_mem_writel,
+ };
+ I6300State *d = (I6300State *) dev;
+ int io_mem;
+
+ i6300esb_debug("addr = %x, size = %x, type = %d\n", addr, size, type);
+
+ io_mem = cpu_register_io_memory (0, mem_read, mem_write, d);
+ cpu_register_physical_memory (addr, 0x10, io_mem);
+ /* qemu_register_coalesced_mmio (addr, 0x10); ? */
+}
+
+static void i6300esb_save(QEMUFile *f, void *vp)
+{
+ I6300State *d = (I6300State *) vp;
+
+ pci_device_save(&d->dev, f);
+ qemu_put_be32(f, d->reboot_enabled);
+ qemu_put_be32(f, d->clock_scale);
+ qemu_put_be32(f, d->int_type);
+ qemu_put_be32(f, d->free_run);
+ qemu_put_be32(f, d->locked);
+ qemu_put_be32(f, d->enabled);
+ qemu_put_timer(f, d->timer);
+ qemu_put_be32(f, d->timer1_preload);
+ qemu_put_be32(f, d->timer2_preload);
+ qemu_put_be32(f, d->stage);
+ qemu_put_be32(f, d->unlock_state);
+ qemu_put_be32(f, d->previous_reboot_flag);
+}
+
+static int i6300esb_load(QEMUFile *f, void *vp, int version)
+{
+ I6300State *d = (I6300State *) vp;
+
+ if (version != sizeof (I6300State))
+ return -EINVAL;
+
+ pci_device_load(&d->dev, f);
+ d->reboot_enabled = qemu_get_be32(f);
+ d->clock_scale = qemu_get_be32(f);
+ d->int_type = qemu_get_be32(f);
+ d->free_run = qemu_get_be32(f);
+ d->locked = qemu_get_be32(f);
+ d->enabled = qemu_get_be32(f);
+ qemu_get_timer(f, d->timer);
+ d->timer1_preload = qemu_get_be32(f);
+ d->timer2_preload = qemu_get_be32(f);
+ d->stage = qemu_get_be32(f);
+ d->unlock_state = qemu_get_be32(f);
+ d->previous_reboot_flag = qemu_get_be32(f);
+
+ return 0;
+}
+
+/* Create and initialize a virtual Intel 6300ESB during PC creation. */
+static void i6300esb_pc_init(PCIBus *pci_bus)
+{
+ I6300State *d;
+ uint8_t *pci_conf;
+
+ if (!pci_bus) {
+ fprintf(stderr, "wdt_i6300esb: no PCI bus in this machine\n");
+ return;
+ }
+
+ d = (I6300State *)
+ pci_register_device (pci_bus, "i6300esb_wdt", sizeof (I6300State),
+ -1,
+ i6300esb_config_read, i6300esb_config_write);
+
+ d->reboot_enabled = 1;
+ d->clock_scale = CLOCK_SCALE_1KHZ;
+ d->int_type = INT_TYPE_IRQ;
+ d->free_run = 0;
+ d->locked = 0;
+ d->enabled = 0;
+ d->timer = qemu_new_timer(vm_clock, i6300esb_timer_expired, d);
+ d->timer1_preload = 0xfffff;
+ d->timer2_preload = 0xfffff;
+ d->stage = 1;
+ d->unlock_state = 0;
+ d->previous_reboot_flag = 0;
+
+ pci_conf = d->dev.config;
+ pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
+ pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_ESB_9);
+ pci_config_set_class(pci_conf, PCI_CLASS_SYSTEM_OTHER);
+ pci_conf[0x0e] = 0x00;
+
+ pci_register_io_region(&d->dev, 0, 0x10,
+ PCI_ADDRESS_SPACE_MEM, i6300esb_map);
+
+ register_savevm("i6300esb_wdt", -1, sizeof(I6300State),
+ i6300esb_save, i6300esb_load, d);
+}
+
+static WatchdogTimerModel model = {
+ .wdt_name = "i6300esb",
+ .wdt_description = "Intel 6300ESB",
+ .wdt_pc_init = i6300esb_pc_init,
+};
+
+void wdt_i6300esb_init(void)
+{
+ watchdog_add_model(&model);
+}
diff --git a/hw/wdt_ib700.c b/hw/wdt_ib700.c
new file mode 100644
index 0000000..d32aaf1
--- /dev/null
+++ b/hw/wdt_ib700.c
@@ -0,0 +1,112 @@
+/*
+ * Virtual hardware watchdog.
+ *
+ * Copyright (C) 2009 Red Hat Inc.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ *
+ * By Richard W.M. Jones (address@hidden).
+ */
+
+#include "qemu-common.h"
+#include "qemu-timer.h"
+#include "watchdog.h"
+#include "hw.h"
+#include "isa.h"
+#include "pc.h"
+
+/*#define IB700_DEBUG 1*/
+
+#ifdef IB700_DEBUG
+#define ib700_debug(fs,...) \
+ fprintf(stderr,"ib700: %s: "fs,__func__,##__VA_ARGS__)
+#else
+#define ib700_debug(fs,...)
+#endif
+
+/* This is the timer. We use a global here because the watchdog
+ * code ensures there is only one watchdog (it is located at a fixed,
+ * unchangable IO port, so there could only ever be one anyway).
+ */
+static QEMUTimer *timer = NULL;
+
+/* A write to this register enables the timer. */
+static void ib700_write_enable_reg(void *vp, uint32_t addr, uint32_t data)
+{
+ static int time_map[] = {
+ 30, 28, 26, 24, 22, 20, 18, 16,
+ 14, 12, 10, 8, 6, 4, 2, 0
+ };
+ int64 timeout;
+
+ ib700_debug("addr = %x, data = %x\n", addr, data);
+
+ timeout = (int64_t) time_map[data & 0xF] * ticks_per_sec;
+ qemu_mod_timer(timer, qemu_get_clock (vm_clock) + timeout);
+}
+
+/* A write (of any value) to this register disables the timer. */
+static void ib700_write_disable_reg(void *vp, uint32_t addr, uint32_t data)
+{
+ ib700_debug("addr = %x, data = %x\n", addr, data);
+
+ qemu_del_timer(timer);
+}
+
+/* This is called when the watchdog expires. */
+static void ib700_timer_expired(void *vp)
+{
+ ib700_debug("watchdog expired\n");
+
+ watchdog_perform_action();
+ qemu_del_timer(timer);
+}
+
+static void ib700_save(QEMUFile *f, void *vp)
+{
+ qemu_put_timer(f, timer);
+}
+
+static int ib700_load(QEMUFile *f, void *vp, int version)
+{
+ if (version != 0)
+ return -EINVAL;
+
+ qemu_get_timer(f, timer);
+
+ return 0;
+}
+
+/* Create and initialize a virtual IB700 during PC creation. */
+static void ib700_pc_init(PCIBus *unused)
+{
+ register_savevm("ib700_wdt", -1, 0, ib700_save, ib700_load, NULL);
+
+ register_ioport_write(0x441, 2, 1, ib700_write_disable_reg, NULL);
+ register_ioport_write(0x443, 2, 1, ib700_write_enable_reg, NULL);
+}
+
+static WatchdogTimerModel model = {
+ .wdt_name = "ib700",
+ .wdt_description = "iBASE 700",
+ .wdt_pc_init = ib700_pc_init,
+};
+
+void wdt_ib700_init(void)
+{
+ watchdog_add_model(&model);
+ timer = qemu_new_timer(vm_clock, ib700_timer_expired, NULL);
+}
diff --git a/monitor.c b/monitor.c
index b33fea1..d64f459 100644
--- a/monitor.c
+++ b/monitor.c
@@ -27,6 +27,7 @@
#include "hw/pcmcia.h"
#include "hw/pc.h"
#include "hw/pci.h"
+#include "hw/watchdog.h"
#include "gdbstub.h"
#include "net.h"
#include "qemu-char.h"
@@ -597,6 +598,13 @@ static void do_gdbserver(Monitor *mon, const char *device)
}
#endif
+static void do_watchdog_action(Monitor *mon, const char *action)
+{
+ if (select_watchdog_action(action) == -1) {
+ monitor_printf(mon, "Unknown watchdog action '%s'\n", action);
+ }
+}
+
static void monitor_printc(Monitor *mon, int c)
{
monitor_printf(mon, "'");
@@ -1762,6 +1770,8 @@ static const mon_cmd_t mon_cmds[] = {
"target", "request VM to change it's memory allocation (in MB)" },
{ "set_link", "ss", do_set_link,
"name up|down", "change the link status of a network adapter" },
+ { "watchdog_action", "s", do_watchdog_action,
+ "[reset|shutdown|poweroff|pause|debug|none]", "change watchdog action" },
{ "acl", "sss?i?", do_acl, "<command> <aclname> [<match> [<index>]]\n",
"acl show vnc.username\n"
"acl policy vnc.username deny\n"
diff --git a/qemu-options.hx b/qemu-options.hx
index aa786e3..342b0e6 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1448,6 +1448,55 @@ order cores with complex cache hierarchies. The number
of instructions
executed often has little or no correlation with actual performance.
ETEXI
+DEF("watchdog", HAS_ARG, QEMU_OPTION_watchdog, \
+ "-watchdog i6300esb|ib700\n" \
+ " enable virtual hardware watchdog [default=none]\n")
+STEXI
address@hidden -watchdog @var{model}
+Create a virtual hardware watchdog device. Once enabled (by a guest
+action), the watchdog must be periodically polled by an agent inside
+the guest or else the guest will be restarted.
+
+The @var{model} is the model of hardware watchdog to emulate. Choices
+for model are: @code{ib700} (iBASE 700) which is a very simple ISA
+watchdog with a single timer, or @code{i6300esb} (Intel 6300ESB I/O
+controller hub) which is a much more featureful PCI-based dual-timer
+watchdog. Choose a model for which your guest has drivers.
+
+Use @code{-watchdog ?} to list available hardware models. Only one
+watchdog can be enabled for a guest.
+ETEXI
+
+DEF("watchdog-action", HAS_ARG, QEMU_OPTION_watchdog_action, \
+ "-watchdog-action reset|shutdown|poweroff|pause|debug|none\n" \
+ " action when watchdog fires [default=reset]\n")
+STEXI
address@hidden -watchdog-action @var{action}
+
+The @var{action} controls what QEMU will do when the watchdog timer
+expires.
+The default is
address@hidden (forcefully reset the guest).
+Other possible actions are:
address@hidden (attempt to gracefully shutdown the guest),
address@hidden (forcefully poweroff the guest),
address@hidden (pause the guest),
address@hidden (print a debug message and continue), or
address@hidden (do nothing).
+
+Note that the @code{shutdown} action requires that the guest responds
+to ACPI signals, which it may not be able to do in the sort of
+situations where the watchdog would have expired, and thus
address@hidden shutdown} is not recommended for production use.
+
+Examples:
+
address@hidden @code
address@hidden -watchdog i6300esb -watchdog-action pause
address@hidden -watchdog ib700
address@hidden table
+ETEXI
+
DEF("echr", HAS_ARG, QEMU_OPTION_echr, \
"-echr chr set terminal escape character instead of ctrl-a\n")
STEXI
diff --git a/vl.c b/vl.c
index 04add68..2d38ded 100644
--- a/vl.c
+++ b/vl.c
@@ -138,6 +138,7 @@ int main(int argc, char **argv)
#include "hw/isa.h"
#include "hw/baum.h"
#include "hw/bt.h"
+#include "hw/watchdog.h"
#include "hw/smbios.h"
#include "hw/xen.h"
#include "bt-host.h"
@@ -252,6 +253,8 @@ int graphic_rotate = 0;
#ifndef _WIN32
int daemonize = 0;
#endif
+WatchdogTimerModel *watchdog = NULL;
+int watchdog_action = WDT_RESET;
const char *option_rom[MAX_OPTION_ROMS];
int nb_option_roms;
int semihosting_enabled = 0;
@@ -4917,6 +4920,8 @@ int main(int argc, char **argv, char **envp)
tb_size = 0;
autostart= 1;
+ register_watchdogs();
+
optind = 1;
for(;;) {
if (optind >= argc)
@@ -5308,6 +5313,17 @@ int main(int argc, char **argv, char **envp)
serial_devices[serial_device_index] = optarg;
serial_device_index++;
break;
+ case QEMU_OPTION_watchdog:
+ i = select_watchdog(optarg);
+ if (i > 0)
+ exit (i == 1 ? 1 : 0);
+ break;
+ case QEMU_OPTION_watchdog_action:
+ if (select_watchdog_action(optarg) == -1) {
+ fprintf(stderr, "Unknown -watchdog-action parameter\n");
+ exit(1);
+ }
+ break;
case QEMU_OPTION_virtiocon:
if (virtio_console_index >= MAX_VIRTIO_CONSOLES) {
fprintf(stderr, "qemu: too many virtio consoles\n");
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- [Qemu-commits] [COMMIT 3e9627e] Hardware watchdog,
Anthony Liguori <=