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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [RFC PATCH KERNEL 2/4] x86/xen: split smp.c for PV and PVHVM guests
More or less mechanically split smp.c into 3 files. XEN_PV_SMP and
XEN_PVHVM_SMP config options added to support the change.
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
arch/x86/xen/Kconfig | 8 ++
arch/x86/xen/Makefile | 5 +-
arch/x86/xen/enlighten.c | 8 ++
arch/x86/xen/smp.c | 295 +++-------------------------------------------
arch/x86/xen/smp.h | 23 ++++
arch/x86/xen/smp_common.c | 246 ++++++++++++++++++++++++++++++++++++++
arch/x86/xen/smp_hvm.c | 54 +++++++++
7 files changed, 359 insertions(+), 280 deletions(-)
create mode 100644 arch/x86/xen/smp_common.c
create mode 100644 arch/x86/xen/smp_hvm.c
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 8298378..e25c93e 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -21,6 +21,10 @@ config XEN_PV
help
Support running as a Xen PV guest.
+config XEN_PV_SMP
+ def_bool y
+ depends on XEN_PV && SMP
+
config XEN_DOM0
bool "Xen PV Dom0 support"
default y
@@ -37,6 +41,10 @@ config XEN_PVHVM
help
Support running as a Xen PVHVM guest.
+config XEN_PVHVM_SMP
+ def_bool y
+ depends on XEN_PVHVM && SMP
+
config XEN_512GB
bool "Limit Xen pv-domain memory to 512GB"
depends on XEN_PV && X86_64
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index e60fc93..aa6cd5e 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -20,7 +20,10 @@ obj-$(CONFIG_XEN_PVHVM) += enlighten_hvm.o
obj-$(CONFIG_EVENT_TRACING) += trace.o
-obj-$(CONFIG_SMP) += smp.o
+obj-$(CONFIG_SMP) += smp_common.o
+obj-$(CONFIG_XEN_PV_SMP) += smp.o
+obj-$(CONFIG_XEN_PVHVM_SMP) += smp_hvm.o
+
obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
obj-$(CONFIG_XEN_DOM0) += vga.o
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 086c339..583221c 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1603,12 +1603,20 @@ static int xen_cpu_up_prepare_pv(unsigned int cpu)
cpu, rc);
return rc;
}
+
+ rc = xen_smp_intr_init_pv(cpu);
+ if (rc) {
+ WARN(1, "xen_smp_intr_init_pv() for CPU %d failed: %d\n",
+ cpu, rc);
+ return rc;
+ }
return 0;
}
static int xen_cpu_dead_pv(unsigned int cpu)
{
xen_smp_intr_free(cpu);
+ xen_smp_intr_free_pv(cpu);
if (xen_pv_domain() || xen_feature(XENFEAT_hvm_safe_pvclock))
xen_teardown_timer(cpu);
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index bdb0d9c..0cb6d99 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -43,32 +43,11 @@
cpumask_var_t xen_cpu_initialized_map;
-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 DEFINE_PER_CPU(struct xen_common_irq, xen_pmu_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);
static irqreturn_t xen_irq_work_interrupt(int irq, void *dev_id);
-/*
- * Reschedule call back.
- */
-static irqreturn_t xen_reschedule_interrupt(int irq, void *dev_id)
-{
- inc_irq_stat(irq_resched_count);
- scheduler_ipi();
-
- return IRQ_HANDLED;
-}
-
static void cpu_bringup(void)
{
int cpu;
@@ -121,36 +100,8 @@ asmlinkage __visible void cpu_bringup_and_idle(int cpu)
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
-void xen_smp_intr_free(unsigned int cpu)
+void xen_smp_intr_free_pv(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;
@@ -164,63 +115,12 @@ void xen_smp_intr_free(unsigned int cpu)
kfree(per_cpu(xen_pmu_irq, cpu).name);
per_cpu(xen_pmu_irq, cpu).name = NULL;
}
-};
-int xen_smp_intr_init(unsigned int cpu)
+}
+
+int xen_smp_intr_init_pv(unsigned int cpu)
{
int rc;
- char *resched_name, *callfunc_name, *debug_name, *pmu_name;
-
- resched_name = kasprintf(GFP_KERNEL, "resched%d", cpu);
- rc = bind_ipi_to_irqhandler(XEN_RESCHEDULE_VECTOR,
- cpu,
- xen_reschedule_interrupt,
- IRQF_PERCPU|IRQF_NOBALANCING,
- resched_name,
- NULL);
- if (rc < 0)
- goto fail;
- 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,
- cpu,
- xen_call_function_interrupt,
- IRQF_PERCPU|IRQF_NOBALANCING,
- callfunc_name,
- NULL);
- if (rc < 0)
- goto fail;
- 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,
- IRQF_PERCPU | IRQF_NOBALANCING,
- debug_name, NULL);
- if (rc < 0)
- goto fail;
- 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,
- cpu,
- xen_call_function_single_interrupt,
- IRQF_PERCPU|IRQF_NOBALANCING,
- callfunc_name,
- NULL);
- if (rc < 0)
- goto fail;
- 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
- * IPI mechanism.
- */
- if (xen_hvm_domain())
- return 0;
+ char *callfunc_name, *pmu_name;
callfunc_name = kasprintf(GFP_KERNEL, "irqwork%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_IRQ_WORK_VECTOR,
@@ -249,11 +149,10 @@ int xen_smp_intr_init(unsigned int cpu)
return 0;
fail:
- xen_smp_intr_free(cpu);
+ xen_smp_intr_free_pv(cpu);
return rc;
}
-#ifdef CONFIG_XEN_PV
static void __init xen_fill_possible_map(void)
{
int i, rc;
@@ -305,7 +204,6 @@ static void __init xen_filter_cpu_maps(void)
#endif
}
-#endif
static void __init xen_smp_prepare_boot_cpu(void)
{
@@ -313,7 +211,6 @@ static void __init xen_smp_prepare_boot_cpu(void)
native_smp_prepare_boot_cpu();
if (xen_pv_domain()) {
-#ifdef CONFIG_XEN_PV
if (!xen_feature(XENFEAT_writable_page_tables))
/* We've switched to the "real" per-cpu gdt, so make
* sure the old memory can be recycled. */
@@ -330,16 +227,9 @@ static void __init xen_smp_prepare_boot_cpu(void)
xen_filter_cpu_maps();
xen_setup_vcpu_info_placement();
-#endif
}
/*
- * Setup vcpu_info for boot CPU.
- */
- if (xen_hvm_domain())
- xen_vcpu_setup(0);
-
- /*
* The alternative logic (which patches the unlock/lock) runs before
* the smp bootup up code is activated. Hence we need to set this up
* the core kernel is being patched. Otherwise we will have only
@@ -348,7 +238,6 @@ static void __init xen_smp_prepare_boot_cpu(void)
xen_init_spinlocks();
}
-#ifdef CONFIG_XEN_PV
static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
{
unsigned cpu;
@@ -380,6 +269,9 @@ static void __init xen_smp_prepare_cpus(unsigned int
max_cpus)
if (xen_smp_intr_init(0))
BUG();
+ if (xen_smp_intr_init_pv(0))
+ BUG();
+
if (!alloc_cpumask_var(&xen_cpu_initialized_map, GFP_KERNEL))
panic("could not allocate xen_cpu_initialized_map\n");
@@ -489,7 +381,7 @@ static int xen_cpu_up(unsigned int cpu, struct task_struct
*idle)
/*
* PV VCPUs are always successfully taken down (see 'while' loop
- * in xen_cpu_die()), so -EBUSY is an error.
+ * in xen_cpu_die_pv()), so -EBUSY is an error.
*/
rc = cpu_check_up_prepare(cpu);
if (rc)
@@ -552,7 +444,7 @@ static int xen_cpu_disable(void)
return -ENOSYS;
}
-static void xen_cpu_die(unsigned int cpu)
+static void xen_cpu_die_pv(unsigned int cpu)
{
BUG();
}
@@ -581,159 +473,24 @@ static void xen_stop_other_cpus(int wait)
{
smp_call_function(stop_self, NULL, wait);
}
-#endif /* CONFIG_XEN_PV */
-static void xen_cpu_die(unsigned int cpu)
+void xen_cpu_die_pv(unsigned int cpu)
{
- while (xen_pv_domain() && HYPERVISOR_vcpu_op(VCPUOP_is_up,
- xen_vcpu_nr(cpu), NULL)) {
+ while (HYPERVISOR_vcpu_op(VCPUOP_is_up,
+ xen_vcpu_nr(cpu), NULL)) {
__set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(HZ/10);
}
if (common_cpu_die(cpu) == 0) {
xen_smp_intr_free(cpu);
+ xen_smp_intr_free_pv(cpu);
xen_uninit_lock_cpu(cpu);
xen_teardown_timer(cpu);
xen_pmu_finish(cpu);
}
}
-static void xen_smp_send_reschedule(int cpu)
-{
- xen_send_IPI_one(cpu, XEN_RESCHEDULE_VECTOR);
-}
-
-static void __xen_send_IPI_mask(const struct cpumask *mask,
- int vector)
-{
- unsigned cpu;
-
- for_each_cpu_and(cpu, mask, cpu_online_mask)
- xen_send_IPI_one(cpu, vector);
-}
-
-static void xen_smp_send_call_function_ipi(const struct cpumask *mask)
-{
- int cpu;
-
- __xen_send_IPI_mask(mask, XEN_CALL_FUNCTION_VECTOR);
-
- /* Make sure other vcpus get a chance to run if they need to. */
- for_each_cpu(cpu, mask) {
- if (xen_vcpu_stolen(cpu)) {
- HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
- break;
- }
- }
-}
-
-static void xen_smp_send_call_function_single_ipi(int cpu)
-{
- __xen_send_IPI_mask(cpumask_of(cpu),
- XEN_CALL_FUNCTION_SINGLE_VECTOR);
-}
-
-static inline int xen_map_vector(int vector)
-{
- int xen_vector;
-
- switch (vector) {
- case RESCHEDULE_VECTOR:
- xen_vector = XEN_RESCHEDULE_VECTOR;
- break;
- case CALL_FUNCTION_VECTOR:
- xen_vector = XEN_CALL_FUNCTION_VECTOR;
- break;
- case CALL_FUNCTION_SINGLE_VECTOR:
- xen_vector = XEN_CALL_FUNCTION_SINGLE_VECTOR;
- break;
- case IRQ_WORK_VECTOR:
- xen_vector = XEN_IRQ_WORK_VECTOR;
- break;
-#ifdef CONFIG_X86_64
- case NMI_VECTOR:
- case APIC_DM_NMI: /* Some use that instead of NMI_VECTOR */
- xen_vector = XEN_NMI_VECTOR;
- break;
-#endif
- default:
- xen_vector = -1;
- printk(KERN_ERR "xen: vector 0x%x is not implemented\n",
- vector);
- }
-
- return xen_vector;
-}
-
-void xen_send_IPI_mask(const struct cpumask *mask,
- int vector)
-{
- int xen_vector = xen_map_vector(vector);
-
- if (xen_vector >= 0)
- __xen_send_IPI_mask(mask, xen_vector);
-}
-
-void xen_send_IPI_all(int vector)
-{
- int xen_vector = xen_map_vector(vector);
-
- if (xen_vector >= 0)
- __xen_send_IPI_mask(cpu_online_mask, xen_vector);
-}
-
-void xen_send_IPI_self(int vector)
-{
- int xen_vector = xen_map_vector(vector);
-
- if (xen_vector >= 0)
- xen_send_IPI_one(smp_processor_id(), xen_vector);
-}
-
-void xen_send_IPI_mask_allbutself(const struct cpumask *mask,
- int vector)
-{
- unsigned cpu;
- unsigned int this_cpu = smp_processor_id();
- int xen_vector = xen_map_vector(vector);
-
- if (!(num_online_cpus() > 1) || (xen_vector < 0))
- return;
-
- for_each_cpu_and(cpu, mask, cpu_online_mask) {
- if (this_cpu == cpu)
- continue;
-
- xen_send_IPI_one(cpu, xen_vector);
- }
-}
-
-void xen_send_IPI_allbutself(int vector)
-{
- xen_send_IPI_mask_allbutself(cpu_online_mask, vector);
-}
-
-static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id)
-{
- irq_enter();
- generic_smp_call_function_interrupt();
- inc_irq_stat(irq_call_count);
- irq_exit();
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id)
-{
- irq_enter();
- generic_smp_call_function_single_interrupt();
- inc_irq_stat(irq_call_count);
- irq_exit();
-
- return IRQ_HANDLED;
-}
-
static irqreturn_t xen_irq_work_interrupt(int irq, void *dev_id)
{
irq_enter();
@@ -744,14 +501,13 @@ static irqreturn_t xen_irq_work_interrupt(int irq, void
*dev_id)
return IRQ_HANDLED;
}
-#ifdef CONFIG_XEN_PV
static const struct smp_ops xen_smp_ops __initconst = {
.smp_prepare_boot_cpu = xen_smp_prepare_boot_cpu,
.smp_prepare_cpus = xen_smp_prepare_cpus,
.smp_cpus_done = xen_smp_cpus_done,
.cpu_up = xen_cpu_up,
- .cpu_die = xen_cpu_die,
+ .cpu_die = xen_cpu_die_pv,
.cpu_disable = xen_cpu_disable,
.play_dead = xen_play_dead,
@@ -767,22 +523,3 @@ void __init xen_smp_init(void)
smp_ops = xen_smp_ops;
xen_fill_possible_map();
}
-#endif
-
-static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
-{
- native_smp_prepare_cpus(max_cpus);
- WARN_ON(xen_smp_intr_init(0));
-
- xen_init_lock_cpu(0);
-}
-
-void __init xen_hvm_smp_init(void)
-{
- smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus;
- smp_ops.smp_send_reschedule = xen_smp_send_reschedule;
- smp_ops.cpu_die = xen_cpu_die;
- smp_ops.send_call_func_ipi = xen_smp_send_call_function_ipi;
- smp_ops.send_call_func_single_ipi =
xen_smp_send_call_function_single_ipi;
- smp_ops.smp_prepare_boot_cpu = xen_smp_prepare_boot_cpu;
-}
diff --git a/arch/x86/xen/smp.h b/arch/x86/xen/smp.h
index c5c16dc..94ed5cc 100644
--- a/arch/x86/xen/smp.h
+++ b/arch/x86/xen/smp.h
@@ -8,9 +8,22 @@ extern void xen_send_IPI_mask_allbutself(const struct cpumask
*mask,
extern void xen_send_IPI_allbutself(int vector);
extern void xen_send_IPI_all(int vector);
extern void xen_send_IPI_self(int vector);
+extern void xen_send_IPI_mask(const struct cpumask *mask, int vector);
extern int xen_smp_intr_init(unsigned int cpu);
extern void xen_smp_intr_free(unsigned int cpu);
+#ifdef CONFIG_XEN_PV
+extern int xen_smp_intr_init_pv(unsigned int cpu);
+extern void xen_smp_intr_free_pv(unsigned int cpu);
+#endif
+extern void xen_smp_send_reschedule(int cpu);
+extern void xen_smp_send_call_function_ipi(const struct cpumask *mask);
+extern void xen_smp_send_call_function_single_ipi(int cpu);
+
+struct xen_common_irq {
+ int irq;
+ char *name;
+};
#else /* CONFIG_SMP */
@@ -18,6 +31,16 @@ static inline int xen_smp_intr_init(unsigned int cpu)
{
return 0;
}
+
+#ifdef CONFIG_XEN_PV
+static inline int xen_smp_intr_init_pv(unsigned int cpu)
+{
+ return 0;
+}
+
+static inline void xen_smp_intr_free_pv(unsigned int cpu) {}
+#endif
+
static inline void xen_smp_intr_free(unsigned int cpu) {}
#endif /* CONFIG_SMP */
diff --git a/arch/x86/xen/smp_common.c b/arch/x86/xen/smp_common.c
new file mode 100644
index 0000000..7a39cad
--- /dev/null
+++ b/arch/x86/xen/smp_common.c
@@ -0,0 +1,246 @@
+#include <linux/smp.h>
+#include <linux/slab.h>
+#include <linux/cpumask.h>
+#include <linux/percpu.h>
+
+#include <xen/events.h>
+
+#include "xen-ops.h"
+#include "pmu.h"
+#include "smp.h"
+
+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_debug_irq) = { .irq = -1 };
+
+/*
+ * Reschedule call back.
+ */
+static irqreturn_t xen_reschedule_interrupt(int irq, void *dev_id)
+{
+ inc_irq_stat(irq_resched_count);
+ scheduler_ipi();
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id)
+{
+ irq_enter();
+ generic_smp_call_function_interrupt();
+ inc_irq_stat(irq_call_count);
+ irq_exit();
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id)
+{
+ irq_enter();
+ generic_smp_call_function_single_interrupt();
+ inc_irq_stat(irq_call_count);
+ irq_exit();
+
+ return IRQ_HANDLED;
+}
+
+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;
+ }
+}
+
+int xen_smp_intr_init(unsigned int cpu)
+{
+ int rc;
+ char *resched_name, *callfunc_name, *debug_name;
+
+ resched_name = kasprintf(GFP_KERNEL, "resched%d", cpu);
+ rc = bind_ipi_to_irqhandler(XEN_RESCHEDULE_VECTOR,
+ cpu,
+ xen_reschedule_interrupt,
+ IRQF_PERCPU|IRQF_NOBALANCING,
+ resched_name,
+ NULL);
+ if (rc < 0)
+ goto fail;
+ 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,
+ cpu,
+ xen_call_function_interrupt,
+ IRQF_PERCPU|IRQF_NOBALANCING,
+ callfunc_name,
+ NULL);
+ if (rc < 0)
+ goto fail;
+ 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,
+ IRQF_PERCPU | IRQF_NOBALANCING,
+ debug_name, NULL);
+ if (rc < 0)
+ goto fail;
+ 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,
+ cpu,
+ xen_call_function_single_interrupt,
+ IRQF_PERCPU|IRQF_NOBALANCING,
+ callfunc_name,
+ NULL);
+ if (rc < 0)
+ goto fail;
+ per_cpu(xen_callfuncsingle_irq, cpu).irq = rc;
+ per_cpu(xen_callfuncsingle_irq, cpu).name = callfunc_name;
+
+ return 0;
+
+ fail:
+ xen_smp_intr_free(cpu);
+ return rc;
+}
+
+void xen_smp_send_reschedule(int cpu)
+{
+ xen_send_IPI_one(cpu, XEN_RESCHEDULE_VECTOR);
+}
+
+static void __xen_send_IPI_mask(const struct cpumask *mask,
+ int vector)
+{
+ unsigned cpu;
+
+ for_each_cpu_and(cpu, mask, cpu_online_mask)
+ xen_send_IPI_one(cpu, vector);
+}
+
+void xen_smp_send_call_function_ipi(const struct cpumask *mask)
+{
+ int cpu;
+
+ __xen_send_IPI_mask(mask, XEN_CALL_FUNCTION_VECTOR);
+
+ /* Make sure other vcpus get a chance to run if they need to. */
+ for_each_cpu(cpu, mask) {
+ if (xen_vcpu_stolen(cpu)) {
+ HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
+ break;
+ }
+ }
+}
+
+void xen_smp_send_call_function_single_ipi(int cpu)
+{
+ __xen_send_IPI_mask(cpumask_of(cpu),
+ XEN_CALL_FUNCTION_SINGLE_VECTOR);
+}
+
+static inline int xen_map_vector(int vector)
+{
+ int xen_vector;
+
+ switch (vector) {
+ case RESCHEDULE_VECTOR:
+ xen_vector = XEN_RESCHEDULE_VECTOR;
+ break;
+ case CALL_FUNCTION_VECTOR:
+ xen_vector = XEN_CALL_FUNCTION_VECTOR;
+ break;
+ case CALL_FUNCTION_SINGLE_VECTOR:
+ xen_vector = XEN_CALL_FUNCTION_SINGLE_VECTOR;
+ break;
+ case IRQ_WORK_VECTOR:
+ xen_vector = XEN_IRQ_WORK_VECTOR;
+ break;
+#ifdef CONFIG_X86_64
+ case NMI_VECTOR:
+ case APIC_DM_NMI: /* Some use that instead of NMI_VECTOR */
+ xen_vector = XEN_NMI_VECTOR;
+ break;
+#endif
+ default:
+ xen_vector = -1;
+ printk(KERN_ERR "xen: vector 0x%x is not implemented\n",
+ vector);
+ }
+
+ return xen_vector;
+}
+
+void xen_send_IPI_mask(const struct cpumask *mask, int vector)
+{
+ int xen_vector = xen_map_vector(vector);
+
+ if (xen_vector >= 0)
+ __xen_send_IPI_mask(mask, xen_vector);
+}
+
+void xen_send_IPI_all(int vector)
+{
+ int xen_vector = xen_map_vector(vector);
+
+ if (xen_vector >= 0)
+ __xen_send_IPI_mask(cpu_online_mask, xen_vector);
+}
+
+void xen_send_IPI_self(int vector)
+{
+ int xen_vector = xen_map_vector(vector);
+
+ if (xen_vector >= 0)
+ xen_send_IPI_one(smp_processor_id(), xen_vector);
+}
+
+void xen_send_IPI_mask_allbutself(const struct cpumask *mask,
+ int vector)
+{
+ unsigned cpu;
+ unsigned int this_cpu = smp_processor_id();
+ int xen_vector = xen_map_vector(vector);
+
+ if (!(num_online_cpus() > 1) || (xen_vector < 0))
+ return;
+
+ for_each_cpu_and(cpu, mask, cpu_online_mask) {
+ if (this_cpu == cpu)
+ continue;
+
+ xen_send_IPI_one(cpu, xen_vector);
+ }
+}
+
+void xen_send_IPI_allbutself(int vector)
+{
+ xen_send_IPI_mask_allbutself(cpu_online_mask, vector);
+}
diff --git a/arch/x86/xen/smp_hvm.c b/arch/x86/xen/smp_hvm.c
new file mode 100644
index 0000000..ce4ff59
--- /dev/null
+++ b/arch/x86/xen/smp_hvm.c
@@ -0,0 +1,54 @@
+#include <asm/smp.h>
+
+#include "xen-ops.h"
+#include "smp.h"
+
+static void __init xen_smp_prepare_boot_cpu_hvm(void)
+{
+ BUG_ON(smp_processor_id() != 0);
+ native_smp_prepare_boot_cpu();
+
+ xen_vcpu_setup(0);
+
+ /*
+ * The alternative logic (which patches the unlock/lock) runs before
+ * the smp bootup up code is activated. Hence we need to set this up
+ * the core kernel is being patched. Otherwise we will have only
+ * modules patched but not core code.
+ */
+ xen_init_spinlocks();
+}
+
+static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
+{
+ native_smp_prepare_cpus(max_cpus);
+ WARN_ON(xen_smp_intr_init(0));
+
+ xen_init_lock_cpu(0);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+void xen_cpu_die_hvm(unsigned int cpu)
+{
+ if (common_cpu_die(cpu) == 0) {
+ xen_smp_intr_free(cpu);
+ xen_uninit_lock_cpu(cpu);
+ xen_teardown_timer(cpu);
+ }
+}
+#else
+static void xen_cpu_die_hvm(unsigned int cpu)
+{
+ BUG();
+}
+#endif
+
+void __init xen_hvm_smp_init(void)
+{
+ smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus;
+ smp_ops.smp_send_reschedule = xen_smp_send_reschedule;
+ smp_ops.cpu_die = xen_cpu_die_hvm;
+ smp_ops.send_call_func_ipi = xen_smp_send_call_function_ipi;
+ smp_ops.send_call_func_single_ipi =
xen_smp_send_call_function_single_ipi;
+ smp_ops.smp_prepare_boot_cpu = xen_smp_prepare_boot_cpu_hvm;
+}
--
2.7.4
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