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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Actually make suspending SMP domUs work: the previous commit didn't
# HG changeset patch
# User sos22@xxxxxxxxxxxxxxxxxxxx
# Node ID 7f9b024a509e1a3838fa226cf18d512fc161d370
# Parent 6e6cedc1763db80ac68fefbe6062594416c75aa1
Actually make suspending SMP domUs work: the previous commit didn't
bring the other vcpus up correctly.
Signed-off-by: Steven Smith, sos22@xxxxxxxxx
diff -r 6e6cedc1763d -r 7f9b024a509e
linux-2.6-xen-sparse/arch/xen/i386/kernel/process.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/process.c Wed Aug 17
14:37:22 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/process.c Thu Aug 18
15:27:55 2005
@@ -115,20 +115,12 @@
/* We don't actually take CPU down, just spin without interrupts. */
static inline void play_dead(void)
{
- /* Ack it */
- __get_cpu_var(cpu_state) = CPU_DEAD;
-
- /* We shouldn't have to disable interrupts while dead, but
- * some interrupts just don't seem to go away, and this makes
- * it "work" for testing purposes. */
/* Death loop */
while (__get_cpu_var(cpu_state) != CPU_UP_PREPARE)
HYPERVISOR_yield();
- local_irq_disable();
__flush_tlb_all();
cpu_set(smp_processor_id(), cpu_online_map);
- local_irq_enable();
}
#else
static inline void play_dead(void)
@@ -156,12 +148,23 @@
rmb();
if (cpu_is_offline(cpu)) {
+ printk("<0>Cpu %d going offline.\n",
+ cpu);
+ local_irq_disable();
+ /* Ack it. From this point on until
+ we get woken up, we're not allowed
+ to take any locks. In particular,
+ don't printk. */
+ __get_cpu_var(cpu_state) = CPU_DEAD;
#if defined(CONFIG_XEN) && defined(CONFIG_HOTPLUG_CPU)
/* Tell hypervisor to take vcpu down. */
HYPERVISOR_vcpu_down(cpu);
#endif
play_dead();
- }
+ local_irq_enable();
+ printk("<0>Cpu %d back online.\n",
+ cpu);
+ }
__get_cpu_var(irq_stat).idle_timestamp = jiffies;
xen_idle();
diff -r 6e6cedc1763d -r 7f9b024a509e
linux-2.6-xen-sparse/arch/xen/i386/kernel/smp.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/smp.c Wed Aug 17 14:37:22 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/smp.c Thu Aug 18 15:27:55 2005
@@ -129,9 +129,12 @@
DECLARE_PER_CPU(int, ipi_to_evtchn[NR_IPIS]);
+unsigned uber_debug;
+
static inline void __send_IPI_one(unsigned int cpu, int vector)
{
unsigned int evtchn;
+ int r;
evtchn = per_cpu(ipi_to_evtchn, cpu)[vector];
// printk("send_IPI_mask_bitmask cpu %d vector %d evtchn %d\n", cpu,
vector, evtchn);
@@ -142,7 +145,11 @@
synch_test_bit(evtchn, &s->evtchn_mask[0]))
;
#endif
- notify_via_evtchn(evtchn);
+ if (uber_debug)
+ printk("<0>Notifying on evtchn %d.\n", evtchn);
+ if ((r = notify_via_evtchn(evtchn)) != 0)
+ printk("<0>Hypervisor stopped us sending an IPI: %d.\n",
+ r);
} else
printk("send_IPI to unbound port %d/%d",
cpu, vector);
@@ -161,6 +168,8 @@
if (cpu == smp_processor_id())
continue;
if (cpu_isset(cpu, cpu_online_map)) {
+ if (uber_debug)
+ printk("<0>Sending ipi to %d.\n", cpu);
__send_IPI_one(cpu, vector);
}
}
diff -r 6e6cedc1763d -r 7f9b024a509e
linux-2.6-xen-sparse/arch/xen/i386/kernel/smpboot.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/smpboot.c Wed Aug 17
14:37:22 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/smpboot.c Thu Aug 18
15:27:55 2005
@@ -1616,3 +1616,19 @@
smp_intr_init();
local_setup_timer_irq();
}
+
+DECLARE_PER_CPU(int, timer_irq);
+
+void _restore_vcpu(void)
+{
+ int cpu = smp_processor_id();
+ /* We are the first thing the vcpu runs when it comes back,
+ and we are supposed to restore the IPIs and timer
+ interrupts etc. When we return, the vcpu's idle loop will
+ start up again. */
+ printk("<0>_restore_vcpu %d.\n", cpu);
+ _bind_virq_to_irq(VIRQ_TIMER, cpu, per_cpu(timer_irq, cpu));
+ _bind_virq_to_irq(VIRQ_DEBUG, cpu, per_cpu(ldebug_irq, cpu));
+ _bind_ipi_to_irq(RESCHEDULE_VECTOR, cpu, per_cpu(resched_irq, cpu) );
+ _bind_ipi_to_irq(CALL_FUNCTION_VECTOR, cpu, per_cpu(callfunc_irq, cpu)
);
+}
diff -r 6e6cedc1763d -r 7f9b024a509e
linux-2.6-xen-sparse/arch/xen/i386/kernel/time.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/time.c Wed Aug 17 14:37:22 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/time.c Thu Aug 18 15:27:55 2005
@@ -745,7 +745,7 @@
#endif
/* Dynamically-mapped IRQ. */
-static DEFINE_PER_CPU(int, timer_irq);
+DEFINE_PER_CPU(int, timer_irq);
static struct irqaction irq_timer = {
timer_interrupt, SA_INTERRUPT, CPU_MASK_NONE, "timer0",
diff -r 6e6cedc1763d -r 7f9b024a509e
linux-2.6-xen-sparse/arch/xen/i386/mm/fault.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/mm/fault.c Wed Aug 17 14:37:22 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/mm/fault.c Thu Aug 18 15:27:55 2005
@@ -512,6 +512,7 @@
printk("%08lx\n", regs->eip);
dump_fault_path(address);
die("Oops", regs, error_code);
+ while(1);
bust_spinlocks(0);
do_exit(SIGKILL);
diff -r 6e6cedc1763d -r 7f9b024a509e
linux-2.6-xen-sparse/arch/xen/kernel/evtchn.c
--- a/linux-2.6-xen-sparse/arch/xen/kernel/evtchn.c Wed Aug 17 14:37:22 2005
+++ b/linux-2.6-xen-sparse/arch/xen/kernel/evtchn.c Thu Aug 18 15:27:55 2005
@@ -134,6 +134,8 @@
(void)HYPERVISOR_xen_version(0);
}
+extern unsigned uber_debug;
+
/* NB. Interrupts are disabled on entry. */
asmlinkage void evtchn_do_upcall(struct pt_regs *regs)
{
@@ -145,6 +147,8 @@
vcpu_info->evtchn_upcall_pending = 0;
+ if (uber_debug && cpu != 0)
+ printk("<0>evtchn_do_upcall on %d.\n", cpu);
/* NB. No need for a barrier here -- XCHG is a barrier on x86. */
l1 = xchg(&vcpu_info->evtchn_pending_sel, 0);
while ( l1 != 0 )
@@ -158,9 +162,13 @@
l2 &= ~(1 << l2i);
port = (l1i << 5) + l2i;
- if ( (irq = evtchn_to_irq[port]) != -1 )
+ if (uber_debug && cpu != 0)
+ printk("<0>Port %d.\n", port);
+ if ( (irq = evtchn_to_irq[port]) != -1 ) {
+ if (uber_debug && cpu != 0)
+ printk("<0>irq %d.\n", irq);
do_IRQ(irq, regs);
- else
+ } else
evtchn_device_upcall(port);
}
}
@@ -243,6 +251,71 @@
}
spin_unlock(&irq_mapping_update_lock);
+}
+
+/* This is only used when a vcpu from an xm save. The ipi is expected
+ to have been bound before we suspended, and so all of the xenolinux
+ state is set up; we only need to restore the Xen side of things.
+ The irq number has to be the same, but the evtchn number can
+ change. */
+void _bind_ipi_to_irq(int ipi, int vcpu, int irq)
+{
+ evtchn_op_t op;
+ int evtchn;
+
+ spin_lock(&irq_mapping_update_lock);
+
+ op.cmd = EVTCHNOP_bind_ipi;
+ if ( HYPERVISOR_event_channel_op(&op) != 0 )
+ panic("Failed to bind virtual IPI %d on cpu %d\n", ipi, vcpu);
+ evtchn = op.u.bind_ipi.port;
+
+ printk("<0>IPI %d, old evtchn %d, evtchn %d.\n",
+ ipi, per_cpu(ipi_to_evtchn, vcpu)[ipi],
+ evtchn);
+
+ evtchn_to_irq[irq_to_evtchn[irq]] = -1;
+ irq_to_evtchn[irq] = -1;
+
+ evtchn_to_irq[evtchn] = irq;
+ irq_to_evtchn[irq] = evtchn;
+
+ per_cpu(ipi_to_evtchn, vcpu)[ipi] = evtchn;
+
+ bind_evtchn_to_cpu(evtchn, vcpu);
+
+ spin_unlock(&irq_mapping_update_lock);
+
+ clear_bit(evtchn, HYPERVISOR_shared_info->evtchn_mask);
+}
+
+void _bind_virq_to_irq(int virq, int cpu, int irq)
+{
+ evtchn_op_t op;
+ int evtchn;
+
+ spin_lock(&irq_mapping_update_lock);
+
+ op.cmd = EVTCHNOP_bind_virq;
+ op.u.bind_virq.virq = virq;
+ if ( HYPERVISOR_event_channel_op(&op) != 0 )
+ panic("Failed to bind virtual IRQ %d\n", virq);
+ evtchn = op.u.bind_virq.port;
+
+
+ evtchn_to_irq[irq_to_evtchn[irq]] = -1;
+ irq_to_evtchn[irq] = -1;
+
+ evtchn_to_irq[evtchn] = irq;
+ irq_to_evtchn[irq] = evtchn;
+
+ per_cpu(virq_to_irq, cpu)[virq] = irq;
+
+ bind_evtchn_to_cpu(evtchn, cpu);
+
+ spin_unlock(&irq_mapping_update_lock);
+
+ return irq;
}
int bind_ipi_to_irq(int ipi)
diff -r 6e6cedc1763d -r 7f9b024a509e
linux-2.6-xen-sparse/arch/xen/kernel/reboot.c
--- a/linux-2.6-xen-sparse/arch/xen/kernel/reboot.c Wed Aug 17 14:37:22 2005
+++ b/linux-2.6-xen-sparse/arch/xen/kernel/reboot.c Thu Aug 18 15:27:55 2005
@@ -65,10 +65,56 @@
#define cpu_up(x) (-EOPNOTSUPP)
#endif
+static void save_vcpu_context(int vcpu, vcpu_guest_context_t *ctxt)
+{
+ int r;
+ int gdt_pages;
+ r = HYPERVISOR_vcpu_pickle(vcpu, ctxt);
+ BUG_ON(r != 0);
+ gdt_pages = (ctxt->gdt_ents + 511) / 512;
+ ctxt->ctrlreg[3] = machine_to_phys(ctxt->ctrlreg[3]);
+ for (r = 0; r < gdt_pages; r++) {
+ ctxt->gdt_frames[r] = mfn_to_pfn(ctxt->gdt_frames[r]);
+ }
+}
+
+void _restore_vcpu(int cpu);
+
+static void restore_vcpu_context(int vcpu, vcpu_guest_context_t *ctxt)
+{
+ int r;
+ int gdt_pages = (ctxt->gdt_ents + 511) / 512;
+
+ /* This is kind of a hack, and implicitly relies on the fact that
+ the vcpu stops in a place where all of the call clobbered
+ registers are already dead. */
+ printk("<0>regs.esp %x.\n", ctxt->user_regs.esp);
+ ctxt->user_regs.esp -= 4;
+ ((unsigned long *)ctxt->user_regs.esp)[0] = ctxt->user_regs.eip;
+ ctxt->user_regs.eip = (unsigned long)_restore_vcpu;
+
+ ctxt->ctrlreg[3] = phys_to_machine(ctxt->ctrlreg[3]);
+ for (r = 0; r < gdt_pages; r++) {
+ ctxt->gdt_frames[r] = pfn_to_mfn(ctxt->gdt_frames[r]);
+ }
+ r = HYPERVISOR_boot_vcpu(vcpu, ctxt);
+ if (r != 0) {
+ printk(KERN_EMERG "Failed to reboot vcpu %d (%d)\n", vcpu, r);
+ return;
+ }
+}
+
+/* Whoever decided that printk should call into the scheduler needs to
+ be taken out and shot */
+#define msg(x) HYPERVISOR_console_io(CONSOLEIO_write, sizeof(x), x)
+
+extern unsigned uber_debug;
+
static int __do_suspend(void *ignore)
{
int i, j;
suspend_record_t *suspend_record;
+ static vcpu_guest_context_t suspended_cpu_records[NR_CPUS];
/* Hmmm... a cleaner interface to suspend/resume blkdevs would be nice. */
/* XXX SMH: yes it would :-( */
@@ -158,6 +204,10 @@
__cli();
+ for (i = 0; i < NR_CPUS; i++)
+ if (cpu_isset(i, feasible_cpus))
+ save_vcpu_context(i, &suspended_cpu_records[i]);
+
#ifdef __i386__
mm_pin_all();
kmem_cache_shrink(pgd_cache);
@@ -173,7 +223,9 @@
smp_suspend();
#endif
+ msg("xenbus going down.\n");
xenbus_suspend();
+ msg("xenbus gone down.\n");
ctrl_if_suspend();
@@ -187,10 +239,11 @@
memcpy(&suspend_record->resume_info, &xen_start_info,
sizeof(xen_start_info));
+ msg("Suspending...\n");
/* We'll stop somewhere inside this hypercall. When it returns,
we'll start resuming after the restore. */
HYPERVISOR_suspend(virt_to_machine(suspend_record) >> PAGE_SHIFT);
-
+ msg("Back from suspension\n");
shutting_down = SHUTDOWN_INVALID;
@@ -217,7 +270,9 @@
ctrl_if_resume();
+ msg("Here comes the xenbus...\n");
xenbus_resume();
+ msg("xenbus resumed.\n");
#ifdef CONFIG_SMP
smp_resume();
@@ -231,21 +286,32 @@
usbif_resume();
- preempt_enable();
+ msg("Restoring cpu contexts...\n");
+ for (i = 0; i < NR_CPUS; i++)
+ if (cpu_isset(i, feasible_cpus))
+ restore_vcpu_context(i, &suspended_cpu_records[i]);
+ msg("All vcpus rebooted.\n");
__sti();
out_reenable_cpus:
+ msg("Reenabling cpus.\n");
while (!cpus_empty(feasible_cpus)) {
i = first_cpu(feasible_cpus);
+ printk("<0>Bring up %d/%d.\n", i, num_online_cpus());
+ printk("<0>17 preempt_count %x.\n", preempt_count());
j = cpu_up(i);
+ printk("<0>18 preempt_count %x.\n", preempt_count());
if (j != 0) {
printk(KERN_CRIT "Failed to bring cpu %d back up (%d).\n",
i, j);
err = j;
}
+ printk("<0>%d up.\n", i);
cpu_clear(i, feasible_cpus);
}
+ msg("Reenabled cpus.\n");
+ uber_debug = 0;
out:
if ( suspend_record != NULL )
diff -r 6e6cedc1763d -r 7f9b024a509e
linux-2.6-xen-sparse/include/asm-xen/asm-i386/hypercall.h
--- a/linux-2.6-xen-sparse/include/asm-xen/asm-i386/hypercall.h Wed Aug 17
14:37:22 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/asm-i386/hypercall.h Thu Aug 18
15:27:55 2005
@@ -163,7 +163,7 @@
TRAP_INSTR
: "=a" (ret), "=b" (ign)
: "0" (__HYPERVISOR_sched_op), "1" (SCHEDOP_yield)
- : "memory" );
+ : "memory", "ecx" );
return ret;
}
@@ -178,7 +178,7 @@
TRAP_INSTR
: "=a" (ret), "=b" (ign1)
: "0" (__HYPERVISOR_sched_op), "1" (SCHEDOP_block)
- : "memory" );
+ : "memory", "ecx" );
return ret;
}
@@ -194,7 +194,7 @@
: "=a" (ret), "=b" (ign1)
: "0" (__HYPERVISOR_sched_op),
"1" (SCHEDOP_shutdown | (SHUTDOWN_poweroff << SCHEDOP_reasonshift))
- : "memory" );
+ : "memory", "ecx" );
return ret;
}
@@ -210,7 +210,7 @@
: "=a" (ret), "=b" (ign1)
: "0" (__HYPERVISOR_sched_op),
"1" (SCHEDOP_shutdown | (SHUTDOWN_reboot << SCHEDOP_reasonshift))
- : "memory" );
+ : "memory", "ecx" );
return ret;
}
@@ -228,7 +228,7 @@
: "=a" (ret), "=b" (ign1), "=S" (ign2)
: "0" (__HYPERVISOR_sched_op),
"b" (SCHEDOP_shutdown | (SHUTDOWN_suspend << SCHEDOP_reasonshift)),
- "S" (srec) : "memory");
+ "S" (srec) : "memory", "ecx");
return ret;
}
@@ -244,7 +244,7 @@
: "=a" (ret), "=b" (ign1)
: "0" (__HYPERVISOR_sched_op),
"1" (SCHEDOP_shutdown | (SHUTDOWN_crash << SCHEDOP_reasonshift))
- : "memory" );
+ : "memory", "ecx" );
return ret;
}
@@ -534,7 +534,7 @@
: "=a" (ret), "=b" (ign1)
: "0" (__HYPERVISOR_sched_op),
"1" (SCHEDOP_vcpu_down | (vcpu << SCHEDOP_vcpushift))
- : "memory" );
+ : "memory", "ecx", "edx" );
return ret;
}
@@ -550,8 +550,26 @@
: "=a" (ret), "=b" (ign1)
: "0" (__HYPERVISOR_sched_op),
"1" (SCHEDOP_vcpu_up | (vcpu << SCHEDOP_vcpushift))
+ : "memory", "ecx" );
+
+ return ret;
+}
+
+static inline int
+HYPERVISOR_vcpu_pickle(
+ int vcpu, vcpu_guest_context_t *ctxt)
+{
+ int ret;
+ unsigned long ign1, ign2;
+ __asm__ __volatile__ (
+ TRAP_INSTR
+ : "=a" (ret), "=b" (ign1), "=c" (ign2)
+ : "0" (__HYPERVISOR_sched_op),
+ "1" (SCHEDOP_vcpu_pickle | (vcpu << SCHEDOP_vcpushift)),
+ "2" (ctxt)
: "memory" );
return ret;
}
+
#endif /* __HYPERCALL_H__ */
diff -r 6e6cedc1763d -r 7f9b024a509e xen/arch/x86/domain.c
--- a/xen/arch/x86/domain.c Wed Aug 17 14:37:22 2005
+++ b/xen/arch/x86/domain.c Thu Aug 18 15:27:55 2005
@@ -217,8 +217,16 @@
return xmalloc(struct vcpu);
}
+/* We assume that vcpu 0 is always the last one to be freed in a
+ domain i.e. if v->vcpu_id == 0, the domain should be
+ single-processor. */
void arch_free_vcpu_struct(struct vcpu *v)
{
+ struct vcpu *p;
+ for_each_vcpu(v->domain, p) {
+ if (p->next_in_list == v)
+ p->next_in_list = v->next_in_list;
+ }
xfree(v);
}
@@ -402,8 +410,10 @@
if ( !(c->flags & VGCF_VMX_GUEST) )
{
if ( ((c->user_regs.cs & 3) == 0) ||
- ((c->user_regs.ss & 3) == 0) )
- return -EINVAL;
+ ((c->user_regs.ss & 3) == 0) ) {
+ printf("User regs.cs %x, ss %x.\n", c->user_regs.cs,
c->user_regs.ss);
+ return -EINVAL;
+ }
}
clear_bit(_VCPUF_fpu_initialised, &v->vcpu_flags);
@@ -448,8 +458,10 @@
if ( shadow_mode_refcounts(d) )
{
- if ( !get_page(&frame_table[phys_basetab>>PAGE_SHIFT], d) )
+ if ( !get_page(&frame_table[phys_basetab>>PAGE_SHIFT], d) ) {
+ printf("Bad phys_basetab %lx.\n", phys_basetab);
return -EINVAL;
+ }
}
else
{
@@ -457,13 +469,16 @@
if ( !(c->flags & VGCF_VMX_GUEST) )
#endif
if ( !get_page_and_type(&frame_table[phys_basetab>>PAGE_SHIFT], d,
- PGT_base_page_table) )
+ PGT_base_page_table) ) {
+ printf("Bad phys_basetab2 %lx.\n", phys_basetab);
return -EINVAL;
+ }
}
if ( (rc = (int)set_gdt(v, c->gdt_frames, c->gdt_ents)) != 0 )
{
put_page_and_type(&frame_table[phys_basetab>>PAGE_SHIFT]);
+ printf("Failed to set gdt, %d.\n", rc);
return rc;
}
@@ -484,6 +499,8 @@
/* Don't redo final setup */
set_bit(_VCPUF_initialised, &v->vcpu_flags);
+
+ printf("Arch set_info_guest succeeded.\n");
return 0;
}
diff -r 6e6cedc1763d -r 7f9b024a509e xen/arch/x86/mm.c
--- a/xen/arch/x86/mm.c Wed Aug 17 14:37:22 2005
+++ b/xen/arch/x86/mm.c Thu Aug 18 15:27:55 2005
@@ -2631,16 +2631,25 @@
int i, nr_pages = (entries + 511) / 512;
unsigned long pfn;
- if ( entries > FIRST_RESERVED_GDT_ENTRY )
+ if ( entries > FIRST_RESERVED_GDT_ENTRY ) {
+ printf("Too many entries in gdt (%d).\n", entries);
return -EINVAL;
+ }
shadow_sync_all(d);
/* Check the pages in the new GDT. */
- for ( i = 0; i < nr_pages; i++ )
- if ( ((pfn = frames[i]) >= max_page) ||
- !get_page_and_type(&frame_table[pfn], d, PGT_gdt_page) )
+ for ( i = 0; i < nr_pages; i++ ) {
+ pfn = frames[i];
+ if (pfn >= max_page) {
+ printf("GDT bad as %ld >= %ld.\n", pfn, max_page);
goto fail;
+ }
+ if (!get_page_and_type(&frame_table[pfn], d, PGT_gdt_page) ) {
+ printf("Frame %ld looks bad.\n", pfn);
+ goto fail;
+ }
+ }
/* Tear down the old GDT. */
destroy_gdt(v);
diff -r 6e6cedc1763d -r 7f9b024a509e xen/arch/x86/time.c
--- a/xen/arch/x86/time.c Wed Aug 17 14:37:22 2005
+++ b/xen/arch/x86/time.c Thu Aug 18 15:27:55 2005
@@ -831,7 +831,7 @@
tsc_elapsed32 = (u32)tsc_elapsed64;
/* tsc_elapsed > stime_elapsed */
- ASSERT(tsc_elapsed32 != 0);
+ // ASSERT(tsc_elapsed32 != 0);
while ( tsc_elapsed32 <= stime_elapsed32 )
{
tsc_elapsed32 <<= 1;
diff -r 6e6cedc1763d -r 7f9b024a509e xen/common/domain.c
--- a/xen/common/domain.c Wed Aug 17 14:37:22 2005
+++ b/xen/common/domain.c Thu Aug 18 15:27:55 2005
@@ -178,6 +178,7 @@
{
struct domain *d = current->domain;
struct vcpu *v;
+ int cntr;
if ( d->domain_id == 0 )
{
@@ -208,8 +209,17 @@
}
/* Put every vcpu to sleep, but don't wait (avoids inter-vcpu deadlock). */
- for_each_vcpu ( d, v )
+ cntr = 0;
+ printf("Putting %d to sleep.\n", d->domain_id);
+ for_each_vcpu ( d, v ) {
+ if (test_bit(_VCPUF_down, &v->vcpu_flags)) {
+ printf("vcpu %d is down.\n", v->vcpu_id);
+ } else {
+ printf("vcpu %d is up.\n", v->vcpu_id);
+ }
domain_sleep_nosync(v);
+ }
+ printf("Put %d vcpus to sleep for domain shutdown.\n", cntr);
}
diff -r 6e6cedc1763d -r 7f9b024a509e xen/common/event_channel.c
--- a/xen/common/event_channel.c Wed Aug 17 14:37:22 2005
+++ b/xen/common/event_channel.c Thu Aug 18 15:27:55 2005
@@ -292,6 +292,8 @@
chn = evtchn_from_port(d, port);
chn->state = ECS_IPI;
chn->notify_vcpu_id = current->vcpu_id;
+ printf("Bound ipi on vcpu %d to port %d.\n", current->vcpu_id,
+ port);
}
spin_unlock(&d->evtchn_lock);
@@ -497,9 +499,24 @@
evtchn_set_pending(rd->vcpu[rchn->notify_vcpu_id], rport);
break;
case ECS_IPI:
+ if (current->domain->domain_id != 0) {
+ printf("Set %d pending on %d.\n", lport,
+ lchn->notify_vcpu_id);
+ if (lport == 7) {
+ struct vcpu *v = ld->vcpu[lchn->notify_vcpu_id];
+ struct domain *d = v->domain;
+ shared_info_t *s = d->shared_info;
+ printf("pending %x, mask %x, pending_sel %x, upcall_pending
%x.\n",
+ s->evtchn_pending[0],
+ s->evtchn_mask[0],
+ v->vcpu_info->evtchn_pending_sel,
+ v->vcpu_info->evtchn_upcall_pending);
+ }
+ }
evtchn_set_pending(ld->vcpu[lchn->notify_vcpu_id], lport);
break;
default:
+ printf("Failed to set %d pending: state %d.\n", lport, lchn->state);
ret = -EINVAL;
}
diff -r 6e6cedc1763d -r 7f9b024a509e xen/common/schedule.c
--- a/xen/common/schedule.c Wed Aug 17 14:37:22 2005
+++ b/xen/common/schedule.c Thu Aug 18 15:27:55 2005
@@ -38,6 +38,8 @@
#include <xen/mm.h>
#include <public/sched_ctl.h>
+extern void arch_getdomaininfo_ctxt(struct vcpu *,
+ struct vcpu_guest_context *);
/* opt_sched: scheduler - default to SEDF */
static char opt_sched[10] = "sedf";
string_param("sched", opt_sched);
@@ -82,7 +84,8 @@
int i;
SCHED_OP(free_task, d);
- for (i = 0; i < MAX_VIRT_CPUS; i++)
+ /* vcpu 0 has to be the last one destructed. */
+ for (i = MAX_VIRT_CPUS-1; i >= 0; i--)
if ( d->vcpu[i] )
arch_free_vcpu_struct(d->vcpu[i]);
@@ -295,10 +298,37 @@
return 0;
}
+static long do_vcpu_pickle(int vcpu, unsigned long arg)
+{
+ struct vcpu *v;
+ vcpu_guest_context_t *c;
+ int ret = 0;
+
+ if (vcpu >= MAX_VIRT_CPUS)
+ return -EINVAL;
+ v = current->domain->vcpu[vcpu];
+ if (!v)
+ return -ESRCH;
+ /* Don't pickle vcpus which are currently running */
+ if (!test_bit(_VCPUF_down, &v->vcpu_flags)) {
+ printf("Pickling a live vcpu?\n");
+ return -EBUSY;
+ }
+ c = xmalloc(vcpu_guest_context_t);
+ if (!c)
+ return -ENOMEM;
+ arch_getdomaininfo_ctxt(v, c);
+ if (copy_to_user((vcpu_guest_context_t *)arg,
+ (const vcpu_guest_context_t *)c, sizeof(*c)))
+ ret = -EFAULT;
+ xfree(c);
+ return ret;
+}
+
/*
* Demultiplex scheduler-related hypercalls.
*/
-long do_sched_op(unsigned long op)
+long do_sched_op(unsigned long op, unsigned long arg)
{
long ret = 0;
@@ -332,6 +362,12 @@
case SCHEDOP_vcpu_up:
{
ret = do_vcpu_up((int)(op >> SCHEDOP_vcpushift));
+ break;
+ }
+ case SCHEDOP_vcpu_pickle:
+ {
+ ret = do_vcpu_pickle((int)(op >> SCHEDOP_vcpushift), arg);
+ printf("Pickle result %ld.\n", ret);
break;
}
diff -r 6e6cedc1763d -r 7f9b024a509e xen/include/public/xen.h
--- a/xen/include/public/xen.h Wed Aug 17 14:37:22 2005
+++ b/xen/include/public/xen.h Thu Aug 18 15:27:55 2005
@@ -203,6 +203,7 @@
#define SCHEDOP_shutdown 2 /* Stop executing this domain. */
#define SCHEDOP_vcpu_down 3 /* make target VCPU not-runnable. */
#define SCHEDOP_vcpu_up 4 /* make target VCPU runnable. */
+#define SCHEDOP_vcpu_pickle 5 /* save a vcpu's context to memory. */
#define SCHEDOP_cmdmask 255 /* 8-bit command. */
#define SCHEDOP_reasonshift 8 /* 8-bit reason code. (SCHEDOP_shutdown) */
#define SCHEDOP_vcpushift 8 /* 8-bit VCPU target. (SCHEDOP_up|down) */
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