Enable secondary processors as schedulable entities and allow domU's to
run on them. Tested extensively on JS20 and JS21 with up to ten
domains at a time.
Note that this patch relies on the hdec storm patch just posted.
Signed-off-by: Amos Waterland <apw@xxxxxxxxxx>
---
setup.c | 36 ++++++++++++++++--------------------
1 file changed, 16 insertions(+), 20 deletions(-)
diff -r c94df1e4e62c xen/arch/powerpc/setup.c
--- a/xen/arch/powerpc/setup.c Thu Sep 14 15:43:38 2006 -0500
+++ b/xen/arch/powerpc/setup.c Thu Sep 14 18:37:30 2006 -0400
@@ -89,6 +89,8 @@ extern char __per_cpu_start[], __per_cpu
/* move us to a header file */
extern void initialize_keytable(void);
+static struct domain *idle_domain;
+
volatile struct processor_area * volatile global_cpu_table[NR_CPUS];
int is_kernel_text(unsigned long addr)
@@ -152,8 +154,6 @@ static void percpu_free_unused_areas(voi
static void __init start_of_day(void)
{
- struct domain *idle_domain;
-
init_IRQ();
scheduler_init();
@@ -167,23 +167,6 @@ static void __init start_of_day(void)
/* for some reason we need to set our own bit in the thread map */
cpu_set(0, cpu_sibling_map[0]);
-
- percpu_free_unused_areas();
-
- {
- /* FIXME: Xen assumes that an online CPU is a schedualable
- * CPU, but we just are not there yet. Remove this fragment when
- * scheduling processors actually works. */
- int cpuid;
-
- printk("WARNING!: Taking all secondary CPUs offline\n");
-
- for_each_online_cpu(cpuid) {
- if (cpuid == 0)
- continue;
- cpu_clear(cpuid, cpu_online_map);
- }
- }
initialize_keytable();
/* Register another key that will allow for the the Harware Probe
@@ -257,9 +240,19 @@ static int kick_secondary_cpus(int maxcp
/* This is the first C code that secondary processors invoke. */
int secondary_cpu_init(int cpuid, unsigned long r4)
{
+ struct vcpu *vcpu;
+
cpu_initialize(cpuid);
smp_generic_take_timebase();
cpu_set(cpuid, cpu_online_map);
+
+ vcpu = alloc_vcpu(idle_domain, cpuid, cpuid);
+ BUG_ON(vcpu == NULL);
+
+ set_current(idle_domain->vcpu[cpuid]);
+ idle_vcpu[cpuid] = current;
+ startup_cpu_idle_loop();
+
while(1);
}
@@ -332,6 +325,8 @@ static void __init __start_xen(multiboot
debugger_trap_immediate();
#endif
+ start_of_day();
+
/* Deal with secondary processors. */
if (opt_nosmp || ofd_boot_cpu == -1) {
printk("nosmp: leaving secondary processors spinning forever\n");
@@ -340,7 +335,8 @@ static void __init __start_xen(multiboot
kick_secondary_cpus(max_cpus);
}
- start_of_day();
+ /* This cannot be called before secondary cpus are marked online. */
+ percpu_free_unused_areas();
/* Create initial domain 0. */
dom0 = domain_create(0);
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