1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/cpu.h>
10 #include <xen/hvc-console.h>
11 #include "xen-ops.h"
13 static DEFINE_PER_CPU(struct xen_common_irq, xen_resched_irq) = { .irq = -1 };
14 static DEFINE_PER_CPU(struct xen_common_irq, xen_callfunc_irq) = { .irq = -1 };
15 static DEFINE_PER_CPU(struct xen_common_irq, xen_callfuncsingle_irq) = { .irq = -1 };
16 static DEFINE_PER_CPU(struct xen_common_irq, xen_debug_irq) = { .irq = -1 };
32 void xen_smp_intr_free(unsigned int cpu)  in xen_smp_intr_free()  argument
34 	kfree(per_cpu(xen_resched_irq, cpu).name);  in xen_smp_intr_free()
35 	per_cpu(xen_resched_irq, cpu).name = NULL;  in xen_smp_intr_free()
36 	if (per_cpu(xen_resched_irq, cpu).irq >= 0) {  in xen_smp_intr_free()
37 		unbind_from_irqhandler(per_cpu(xen_resched_irq, cpu).irq, NULL);  in xen_smp_intr_free()
38 		per_cpu(xen_resched_irq, cpu).irq = -1;  in xen_smp_intr_free()
40 	kfree(per_cpu(xen_callfunc_irq, cpu).name);  in xen_smp_intr_free()
41 	per_cpu(xen_callfunc_irq, cpu).name = NULL;  in xen_smp_intr_free()
42 	if (per_cpu(xen_callfunc_irq, cpu).irq >= 0) {  in xen_smp_intr_free()
43 		unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu).irq, NULL);  in xen_smp_intr_free()
44 		per_cpu(xen_callfunc_irq, cpu).irq = -1;  in xen_smp_intr_free()
46 	kfree(per_cpu(xen_debug_irq, cpu).name);  in xen_smp_intr_free()
47 	per_cpu(xen_debug_irq, cpu).name = NULL;  in xen_smp_intr_free()
48 	if (per_cpu(xen_debug_irq, cpu).irq >= 0) {  in xen_smp_intr_free()
49 		unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu).irq, NULL);  in xen_smp_intr_free()
50 		per_cpu(xen_debug_irq, cpu).irq = -1;  in xen_smp_intr_free()
52 	kfree(per_cpu(xen_callfuncsingle_irq, cpu).name);  in xen_smp_intr_free()
53 	per_cpu(xen_callfuncsingle_irq, cpu).name = NULL;  in xen_smp_intr_free()
54 	if (per_cpu(xen_callfuncsingle_irq, cpu).irq >= 0) {  in xen_smp_intr_free()
55 		unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu).irq,  in xen_smp_intr_free()
57 		per_cpu(xen_callfuncsingle_irq, cpu).irq = -1;  in xen_smp_intr_free()
61 int xen_smp_intr_init(unsigned int cpu)  in xen_smp_intr_init()  argument
66 	resched_name = kasprintf(GFP_KERNEL, "resched%d", cpu);  in xen_smp_intr_init()
69 	per_cpu(xen_resched_irq, cpu).name = resched_name;  in xen_smp_intr_init()
71 				    cpu,  in xen_smp_intr_init()
78 	per_cpu(xen_resched_irq, cpu).irq = rc;  in xen_smp_intr_init()
80 	callfunc_name = kasprintf(GFP_KERNEL, "callfunc%d", cpu);  in xen_smp_intr_init()
83 	per_cpu(xen_callfunc_irq, cpu).name = callfunc_name;  in xen_smp_intr_init()
85 				    cpu,  in xen_smp_intr_init()
92 	per_cpu(xen_callfunc_irq, cpu).irq = rc;  in xen_smp_intr_init()
95 		debug_name = kasprintf(GFP_KERNEL, "debug%d", cpu);  in xen_smp_intr_init()
99 		per_cpu(xen_debug_irq, cpu).name = debug_name;  in xen_smp_intr_init()
100 		rc = bind_virq_to_irqhandler(VIRQ_DEBUG, cpu,  in xen_smp_intr_init()
106 		per_cpu(xen_debug_irq, cpu).irq = rc;  in xen_smp_intr_init()
109 	callfunc_name = kasprintf(GFP_KERNEL, "callfuncsingle%d", cpu);  in xen_smp_intr_init()
113 	per_cpu(xen_callfuncsingle_irq, cpu).name = callfunc_name;  in xen_smp_intr_init()
115 				    cpu,  in xen_smp_intr_init()
122 	per_cpu(xen_callfuncsingle_irq, cpu).irq = rc;  in xen_smp_intr_init()
127 	rc = -ENOMEM;  in xen_smp_intr_init()
129 	xen_smp_intr_free(cpu);  in xen_smp_intr_init()
139 void xen_smp_send_reschedule(int cpu)  in xen_smp_send_reschedule()  argument
141 	xen_send_IPI_one(cpu, XEN_RESCHEDULE_VECTOR);  in xen_smp_send_reschedule()
147 	unsigned cpu;  in __xen_send_IPI_mask()  local
149 	for_each_cpu_and(cpu, mask, cpu_online_mask)  in __xen_send_IPI_mask()
150 		xen_send_IPI_one(cpu, vector);  in __xen_send_IPI_mask()
155 	int cpu;  in xen_smp_send_call_function_ipi()  local
160 	for_each_cpu(cpu, mask) {  in xen_smp_send_call_function_ipi()
161 		if (xen_vcpu_stolen(cpu)) {  in xen_smp_send_call_function_ipi()
168 void xen_smp_send_call_function_single_ipi(int cpu)  in xen_smp_send_call_function_single_ipi()  argument
170 	__xen_send_IPI_mask(cpumask_of(cpu),  in xen_smp_send_call_function_single_ipi()
198 		xen_vector = -1;  in xen_map_vector()
234 	unsigned cpu;  in xen_send_IPI_mask_allbutself()  local
238 	if (!(num_online_cpus() > 1) || (xen_vector < 0))  in xen_send_IPI_mask_allbutself()
241 	for_each_cpu_and(cpu, mask, cpu_online_mask) {  in xen_send_IPI_mask_allbutself()
242 		if (this_cpu == cpu)  in xen_send_IPI_mask_allbutself()
245 		xen_send_IPI_one(cpu, xen_vector);  in xen_send_IPI_mask_allbutself()