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Diffstat (limited to 'arch/x86/xen')
-rw-r--r--arch/x86/xen/smp.c91
-rw-r--r--arch/x86/xen/spinlock.c7
-rw-r--r--arch/x86/xen/time.c58
3 files changed, 95 insertions, 61 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index d99cae8..c1367b2 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -40,11 +40,15 @@
cpumask_var_t xen_cpu_initialized_map;
-static DEFINE_PER_CPU(int, xen_resched_irq);
-static DEFINE_PER_CPU(int, xen_callfunc_irq);
-static DEFINE_PER_CPU(int, xen_callfuncsingle_irq);
-static DEFINE_PER_CPU(int, xen_irq_work);
-static DEFINE_PER_CPU(int, xen_debug_irq) = -1;
+struct xen_common_irq {
+ int irq;
+ char *name;
+};
+static DEFINE_PER_CPU(struct xen_common_irq, xen_resched_irq) = { .irq = -1 };
+static DEFINE_PER_CPU(struct xen_common_irq, xen_callfunc_irq) = { .irq = -1 };
+static DEFINE_PER_CPU(struct xen_common_irq, xen_callfuncsingle_irq) = { .irq = -1 };
+static DEFINE_PER_CPU(struct xen_common_irq, xen_irq_work) = { .irq = -1 };
+static DEFINE_PER_CPU(struct xen_common_irq, xen_debug_irq) = { .irq = -1 };
static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id);
static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id);
@@ -99,10 +103,47 @@ static void __cpuinit cpu_bringup_and_idle(void)
cpu_startup_entry(CPUHP_ONLINE);
}
+static void xen_smp_intr_free(unsigned int cpu)
+{
+ if (per_cpu(xen_resched_irq, cpu).irq >= 0) {
+ unbind_from_irqhandler(per_cpu(xen_resched_irq, cpu).irq, NULL);
+ per_cpu(xen_resched_irq, cpu).irq = -1;
+ kfree(per_cpu(xen_resched_irq, cpu).name);
+ per_cpu(xen_resched_irq, cpu).name = NULL;
+ }
+ if (per_cpu(xen_callfunc_irq, cpu).irq >= 0) {
+ unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu).irq, NULL);
+ per_cpu(xen_callfunc_irq, cpu).irq = -1;
+ kfree(per_cpu(xen_callfunc_irq, cpu).name);
+ per_cpu(xen_callfunc_irq, cpu).name = NULL;
+ }
+ if (per_cpu(xen_debug_irq, cpu).irq >= 0) {
+ unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu).irq, NULL);
+ per_cpu(xen_debug_irq, cpu).irq = -1;
+ kfree(per_cpu(xen_debug_irq, cpu).name);
+ per_cpu(xen_debug_irq, cpu).name = NULL;
+ }
+ if (per_cpu(xen_callfuncsingle_irq, cpu).irq >= 0) {
+ unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu).irq,
+ NULL);
+ per_cpu(xen_callfuncsingle_irq, cpu).irq = -1;
+ kfree(per_cpu(xen_callfuncsingle_irq, cpu).name);
+ per_cpu(xen_callfuncsingle_irq, cpu).name = NULL;
+ }
+ if (xen_hvm_domain())
+ return;
+
+ if (per_cpu(xen_irq_work, cpu).irq >= 0) {
+ unbind_from_irqhandler(per_cpu(xen_irq_work, cpu).irq, NULL);
+ per_cpu(xen_irq_work, cpu).irq = -1;
+ kfree(per_cpu(xen_irq_work, cpu).name);
+ per_cpu(xen_irq_work, cpu).name = NULL;
+ }
+};
static int xen_smp_intr_init(unsigned int cpu)
{
int rc;
- const char *resched_name, *callfunc_name, *debug_name;
+ char *resched_name, *callfunc_name, *debug_name;
resched_name = kasprintf(GFP_KERNEL, "resched%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_RESCHEDULE_VECTOR,
@@ -113,7 +154,8 @@ static int xen_smp_intr_init(unsigned int cpu)
NULL);
if (rc < 0)
goto fail;
- per_cpu(xen_resched_irq, cpu) = rc;
+ per_cpu(xen_resched_irq, cpu).irq = rc;
+ per_cpu(xen_resched_irq, cpu).name = resched_name;
callfunc_name = kasprintf(GFP_KERNEL, "callfunc%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_VECTOR,
@@ -124,7 +166,8 @@ static int xen_smp_intr_init(unsigned int cpu)
NULL);
if (rc < 0)
goto fail;
- per_cpu(xen_callfunc_irq, cpu) = rc;
+ per_cpu(xen_callfunc_irq, cpu).irq = rc;
+ per_cpu(xen_callfunc_irq, cpu).name = callfunc_name;
debug_name = kasprintf(GFP_KERNEL, "debug%d", cpu);
rc = bind_virq_to_irqhandler(VIRQ_DEBUG, cpu, xen_debug_interrupt,
@@ -132,7 +175,8 @@ static int xen_smp_intr_init(unsigned int cpu)
debug_name, NULL);
if (rc < 0)
goto fail;
- per_cpu(xen_debug_irq, cpu) = rc;
+ per_cpu(xen_debug_irq, cpu).irq = rc;
+ per_cpu(xen_debug_irq, cpu).name = debug_name;
callfunc_name = kasprintf(GFP_KERNEL, "callfuncsingle%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_SINGLE_VECTOR,
@@ -143,7 +187,8 @@ static int xen_smp_intr_init(unsigned int cpu)
NULL);
if (rc < 0)
goto fail;
- per_cpu(xen_callfuncsingle_irq, cpu) = rc;
+ per_cpu(xen_callfuncsingle_irq, cpu).irq = rc;
+ per_cpu(xen_callfuncsingle_irq, cpu).name = callfunc_name;
/*
* The IRQ worker on PVHVM goes through the native path and uses the
@@ -161,26 +206,13 @@ static int xen_smp_intr_init(unsigned int cpu)
NULL);
if (rc < 0)
goto fail;
- per_cpu(xen_irq_work, cpu) = rc;
+ per_cpu(xen_irq_work, cpu).irq = rc;
+ per_cpu(xen_irq_work, cpu).name = callfunc_name;
return 0;
fail:
- if (per_cpu(xen_resched_irq, cpu) >= 0)
- unbind_from_irqhandler(per_cpu(xen_resched_irq, cpu), NULL);
- if (per_cpu(xen_callfunc_irq, cpu) >= 0)
- unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu), NULL);
- if (per_cpu(xen_debug_irq, cpu) >= 0)
- unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu), NULL);
- if (per_cpu(xen_callfuncsingle_irq, cpu) >= 0)
- unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu),
- NULL);
- if (xen_hvm_domain())
- return rc;
-
- if (per_cpu(xen_irq_work, cpu) >= 0)
- unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);
-
+ xen_smp_intr_free(cpu);
return rc;
}
@@ -433,12 +465,7 @@ static void xen_cpu_die(unsigned int cpu)
current->state = TASK_UNINTERRUPTIBLE;
schedule_timeout(HZ/10);
}
- unbind_from_irqhandler(per_cpu(xen_resched_irq, cpu), NULL);
- unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu), NULL);
- unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu), NULL);
- unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu), NULL);
- if (!xen_hvm_domain())
- unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);
+ xen_smp_intr_free(cpu);
xen_uninit_lock_cpu(cpu);
xen_teardown_timer(cpu);
}
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
index 3002ec1..a40f850 100644
--- a/arch/x86/xen/spinlock.c
+++ b/arch/x86/xen/spinlock.c
@@ -7,6 +7,7 @@
#include <linux/debugfs.h>
#include <linux/log2.h>
#include <linux/gfp.h>
+#include <linux/slab.h>
#include <asm/paravirt.h>
@@ -165,6 +166,7 @@ static int xen_spin_trylock(struct arch_spinlock *lock)
return old == 0;
}
+static DEFINE_PER_CPU(char *, irq_name);
static DEFINE_PER_CPU(int, lock_kicker_irq) = -1;
static DEFINE_PER_CPU(struct xen_spinlock *, lock_spinners);
@@ -362,7 +364,7 @@ static irqreturn_t dummy_handler(int irq, void *dev_id)
void __cpuinit xen_init_lock_cpu(int cpu)
{
int irq;
- const char *name;
+ char *name;
WARN(per_cpu(lock_kicker_irq, cpu) >= 0, "spinlock on CPU%d exists on IRQ%d!\n",
cpu, per_cpu(lock_kicker_irq, cpu));
@@ -385,6 +387,7 @@ void __cpuinit xen_init_lock_cpu(int cpu)
if (irq >= 0) {
disable_irq(irq); /* make sure it's never delivered */
per_cpu(lock_kicker_irq, cpu) = irq;
+ per_cpu(irq_name, cpu) = name;
}
printk("cpu %d spinlock event irq %d\n", cpu, irq);
@@ -401,6 +404,8 @@ void xen_uninit_lock_cpu(int cpu)
unbind_from_irqhandler(per_cpu(lock_kicker_irq, cpu), NULL);
per_cpu(lock_kicker_irq, cpu) = -1;
+ kfree(per_cpu(irq_name, cpu));
+ per_cpu(irq_name, cpu) = NULL;
}
void __init xen_init_spinlocks(void)
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 3d88bfd..a690868 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -14,6 +14,7 @@
#include <linux/kernel_stat.h>
#include <linux/math64.h>
#include <linux/gfp.h>
+#include <linux/slab.h>
#include <asm/pvclock.h>
#include <asm/xen/hypervisor.h>
@@ -36,9 +37,8 @@ static DEFINE_PER_CPU(struct vcpu_runstate_info, xen_runstate);
/* snapshots of runstate info */
static DEFINE_PER_CPU(struct vcpu_runstate_info, xen_runstate_snapshot);
-/* unused ns of stolen and blocked time */
+/* unused ns of stolen time */
static DEFINE_PER_CPU(u64, xen_residual_stolen);
-static DEFINE_PER_CPU(u64, xen_residual_blocked);
/* return an consistent snapshot of 64-bit time/counter value */
static u64 get64(const u64 *p)
@@ -115,7 +115,7 @@ static void do_stolen_accounting(void)
{
struct vcpu_runstate_info state;
struct vcpu_runstate_info *snap;
- s64 blocked, runnable, offline, stolen;
+ s64 runnable, offline, stolen;
cputime_t ticks;
get_runstate_snapshot(&state);
@@ -125,7 +125,6 @@ static void do_stolen_accounting(void)
snap = &__get_cpu_var(xen_runstate_snapshot);
/* work out how much time the VCPU has not been runn*ing* */
- blocked = state.time[RUNSTATE_blocked] - snap->time[RUNSTATE_blocked];
runnable = state.time[RUNSTATE_runnable] - snap->time[RUNSTATE_runnable];
offline = state.time[RUNSTATE_offline] - snap->time[RUNSTATE_offline];
@@ -141,17 +140,6 @@ static void do_stolen_accounting(void)
ticks = iter_div_u64_rem(stolen, NS_PER_TICK, &stolen);
__this_cpu_write(xen_residual_stolen, stolen);
account_steal_ticks(ticks);
-
- /* Add the appropriate number of ticks of blocked time,
- including any left-overs from last time. */
- blocked += __this_cpu_read(xen_residual_blocked);
-
- if (blocked < 0)
- blocked = 0;
-
- ticks = iter_div_u64_rem(blocked, NS_PER_TICK, &blocked);
- __this_cpu_write(xen_residual_blocked, blocked);
- account_idle_ticks(ticks);
}
/* Get the TSC speed from Xen */
@@ -377,11 +365,16 @@ static const struct clock_event_device xen_vcpuop_clockevent = {
static const struct clock_event_device *xen_clockevent =
&xen_timerop_clockevent;
-static DEFINE_PER_CPU(struct clock_event_device, xen_clock_events) = { .irq = -1 };
+
+struct xen_clock_event_device {
+ struct clock_event_device evt;
+ char *name;
+};
+static DEFINE_PER_CPU(struct xen_clock_event_device, xen_clock_events) = { .evt.irq = -1 };
static irqreturn_t xen_timer_interrupt(int irq, void *dev_id)
{
- struct clock_event_device *evt = &__get_cpu_var(xen_clock_events);
+ struct clock_event_device *evt = &__get_cpu_var(xen_clock_events).evt;
irqreturn_t ret;
ret = IRQ_NONE;
@@ -395,14 +388,30 @@ static irqreturn_t xen_timer_interrupt(int irq, void *dev_id)
return ret;
}
+void xen_teardown_timer(int cpu)
+{
+ struct clock_event_device *evt;
+ BUG_ON(cpu == 0);
+ evt = &per_cpu(xen_clock_events, cpu).evt;
+
+ if (evt->irq >= 0) {
+ unbind_from_irqhandler(evt->irq, NULL);
+ evt->irq = -1;
+ kfree(per_cpu(xen_clock_events, cpu).name);
+ per_cpu(xen_clock_events, cpu).name = NULL;
+ }
+}
+
void xen_setup_timer(int cpu)
{
- const char *name;
+ char *name;
struct clock_event_device *evt;
int irq;
- evt = &per_cpu(xen_clock_events, cpu);
+ evt = &per_cpu(xen_clock_events, cpu).evt;
WARN(evt->irq >= 0, "IRQ%d for CPU%d is already allocated\n", evt->irq, cpu);
+ if (evt->irq >= 0)
+ xen_teardown_timer(cpu);
printk(KERN_INFO "installing Xen timer for CPU %d\n", cpu);
@@ -420,22 +429,15 @@ void xen_setup_timer(int cpu)
evt->cpumask = cpumask_of(cpu);
evt->irq = irq;
+ per_cpu(xen_clock_events, cpu).name = name;
}
-void xen_teardown_timer(int cpu)
-{
- struct clock_event_device *evt;
- BUG_ON(cpu == 0);
- evt = &per_cpu(xen_clock_events, cpu);
- unbind_from_irqhandler(evt->irq, NULL);
- evt->irq = -1;
-}
void xen_setup_cpu_clockevents(void)
{
BUG_ON(preemptible());
- clockevents_register_device(&__get_cpu_var(xen_clock_events));
+ clockevents_register_device(&__get_cpu_var(xen_clock_events).evt);
}
void xen_timer_resume(void)
generated by cgit v0.10.2 at 2024-11-12 17:45:21 (GMT)