1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Loongson-3 Virtual IPI interrupt support.
52 				gpa_t addr, int len, void *val)  in loongson_vipi_read()  argument
54 	uint32_t core = (addr >> 8) & 3;  in loongson_vipi_read()
55 	uint32_t node = (addr >> 44) & 3;  in loongson_vipi_read()
57 	uint64_t offset = addr & 0xff;  in loongson_vipi_read()
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()
89 		pr_notice("%s with unknown addr %llx\n", __func__, addr);  in loongson_vipi_read()
97 				gpa_t addr, int len, const void *val)  in loongson_vipi_write()  argument
99 	uint32_t core = (addr >> 8) & 3;  in loongson_vipi_write()
100 	uint32_t node = (addr >> 44) & 3;  in loongson_vipi_write()
102 	uint64_t data, offset = addr & 0xff;  in loongson_vipi_write()
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()
123 		kvm_vcpu_ioctl_interrupt(kvm->vcpus[id], &irq);  in loongson_vipi_write()
127 		s->status &= ~data;  in loongson_vipi_write()
128 		if (!s->status) {  in loongson_vipi_write()
130 			irq.irq = -6;  in loongson_vipi_write()
131 			kvm_vcpu_ioctl_interrupt(kvm->vcpus[id], &irq);  in loongson_vipi_write()
136 		pbuf = (void *)s->buf + (offset - 0x20);  in loongson_vipi_write()
144 		pr_notice("%s with unknown addr %llx\n", __func__, addr);  in loongson_vipi_write()
152 			gpa_t addr, int len, void *val)  in kvm_ipi_read()  argument
158 	ipi_device = container_of(dev, struct ipi_io_device, device);  in kvm_ipi_read()
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()
169 			gpa_t addr, int len, const void *val)  in kvm_ipi_write()  argument
175 	ipi_device = container_of(dev, struct ipi_io_device, device);  in kvm_ipi_write()
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()
193 	unsigned long addr;  in kvm_init_loongson_ipi()  local
195 	struct kvm_io_device *device;  in kvm_init_loongson_ipi()  local
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()
206 		kvm_iodevice_init(device, &kvm_ipi_ops);  in kvm_init_loongson_ipi()
207 		addr = (((unsigned long)i) << 44) + IPI_BASE;  in kvm_init_loongson_ipi()
208 		mutex_lock(&kvm->slots_lock);  in kvm_init_loongson_ipi()
209 		kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, addr, 0x400, device);  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()