1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Loongson-3 Virtual IPI interrupt support.
51 static int loongson_vipi_read(struct loongson_kvm_ipi *ipi,  in loongson_vipi_read()  argument
56 	uint32_t id = core + node * 4;  in loongson_vipi_read()  local
59 	struct ipi_state *s = &(ipi->ipistate[id]);  in loongson_vipi_read()
61 	BUG_ON(offset & (len - 1));  in loongson_vipi_read()
65 		*(uint64_t *)val = s->status;  in loongson_vipi_read()
69 		*(uint64_t *)val = s->en;  in loongson_vipi_read()
81 		pbuf = (void *)s->buf + (offset - 0x20);  in loongson_vipi_read()
96 static int loongson_vipi_write(struct loongson_kvm_ipi *ipi,  in loongson_vipi_write()  argument
101 	uint32_t id = core + node * 4;  in loongson_vipi_write()  local
104 	struct kvm *kvm = ipi->kvm;  in loongson_vipi_write()
106 	struct ipi_state *s = &(ipi->ipistate[id]);  in loongson_vipi_write()
109 	BUG_ON(offset & (len - 1));  in loongson_vipi_write()
116 		s->en = data;  in loongson_vipi_write()
120 		s->status |= data;  in loongson_vipi_write()
121 		irq.cpu = id;  in loongson_vipi_write()
123 		kvm_vcpu_ioctl_interrupt(kvm_get_vcpu(kvm, id), &irq);  in loongson_vipi_write()
127 		s->status &= ~data;  in loongson_vipi_write()
128 		if (!s->status) {  in loongson_vipi_write()
129 			irq.cpu = id;  in loongson_vipi_write()
130 			irq.irq = -6;  in loongson_vipi_write()
131 			kvm_vcpu_ioctl_interrupt(kvm_get_vcpu(kvm, id), &irq);  in loongson_vipi_write()
136 		pbuf = (void *)s->buf + (offset - 0x20);  in loongson_vipi_write()
155 	struct loongson_kvm_ipi *ipi;  in kvm_ipi_read()  local
159 	ipi = ipi_device->ipi;  in kvm_ipi_read()
161 	spin_lock_irqsave(&ipi->lock, flags);  in kvm_ipi_read()
162 	loongson_vipi_read(ipi, addr, len, val);  in kvm_ipi_read()
163 	spin_unlock_irqrestore(&ipi->lock, flags);  in kvm_ipi_read()
172 	struct loongson_kvm_ipi *ipi;  in kvm_ipi_write()  local
176 	ipi = ipi_device->ipi;  in kvm_ipi_write()
178 	spin_lock_irqsave(&ipi->lock, flags);  in kvm_ipi_write()
179 	loongson_vipi_write(ipi, addr, len, val);  in kvm_ipi_write()
180 	spin_unlock_irqrestore(&ipi->lock, flags);  in kvm_ipi_write()
197 	s = &kvm->arch.ipi;  in kvm_init_loongson_ipi()
198 	s->kvm = kvm;  in kvm_init_loongson_ipi()
199 	spin_lock_init(&s->lock);  in kvm_init_loongson_ipi()
202 	 * Initialize IPI device  in kvm_init_loongson_ipi()
205 		device = &s->dev_ipi[i].device;  in kvm_init_loongson_ipi()
208 		mutex_lock(&kvm->slots_lock);  in kvm_init_loongson_ipi()
210 		mutex_unlock(&kvm->slots_lock);  in kvm_init_loongson_ipi()
211 		s->dev_ipi[i].ipi = s;  in kvm_init_loongson_ipi()
212 		s->dev_ipi[i].node_id = i;  in kvm_init_loongson_ipi()