1 files changed, 89 insertions, 0 deletions
diff --git a/hw/intc/loongarch_pic_kvm.c b/hw/intc/loongarch_pic_kvm.c
new file mode 100644
index 0000000..dd504ec
--- /dev/null
+++ b/hw/intc/loongarch_pic_kvm.c
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch kvm pch pic interrupt support
+ *
+ * Copyright (C) 2025 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/boards.h"
+#include "hw/intc/loongarch_pch_pic.h"
+#include "hw/loongarch/virt.h"
+#include "hw/pci-host/ls7a.h"
+#include "system/kvm.h"
+
+static void kvm_pch_pic_access_reg(int fd, uint64_t addr, void *val, bool write)
+{
+    kvm_device_access(fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_REGS,
+                      addr, val, write, &error_abort);
+}
+
+static void kvm_pch_pic_access(void *opaque, bool write)
+{
+    LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(opaque);
+    LoongarchPICState *lps = LOONGARCH_PIC(opaque);
+    int fd = lps->dev_fd;
+    int addr, offset;
+
+    if (fd == 0) {
+        return;
+    }
+
+    kvm_pch_pic_access_reg(fd, PCH_PIC_INT_MASK, &s->int_mask, write);
+    kvm_pch_pic_access_reg(fd, PCH_PIC_HTMSI_EN, &s->htmsi_en, write);
+    kvm_pch_pic_access_reg(fd, PCH_PIC_INT_EDGE, &s->intedge, write);
+    kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL0, &s->auto_crtl0, write);
+    kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL1, &s->auto_crtl1, write);
+
+    for (addr = PCH_PIC_ROUTE_ENTRY;
+        addr < PCH_PIC_ROUTE_ENTRY_END; addr++) {
+        offset = addr - PCH_PIC_ROUTE_ENTRY;
+        kvm_pch_pic_access_reg(fd, addr, &s->route_entry[offset], write);
+    }
+
+    for (addr = PCH_PIC_HTMSI_VEC; addr < PCH_PIC_HTMSI_VEC_END; addr++) {
+        offset = addr - PCH_PIC_HTMSI_VEC;
+        kvm_pch_pic_access_reg(fd, addr, &s->htmsi_vector[offset], write);
+    }
+
+    kvm_pch_pic_access_reg(fd, PCH_PIC_INT_REQUEST, &s->intirr, write);
+    kvm_pch_pic_access_reg(fd, PCH_PIC_INT_STATUS, &s->intisr, write);
+    kvm_pch_pic_access_reg(fd, PCH_PIC_INT_POL, &s->int_polarity, write);
+}
+
+int kvm_pic_get(void *opaque)
+{
+    kvm_pch_pic_access(opaque, false);
+    return 0;
+}
+
+int kvm_pic_put(void *opaque, int version_id)
+{
+    kvm_pch_pic_access(opaque, true);
+    return 0;
+}
+
+void kvm_pic_realize(DeviceState *dev, Error **errp)
+{
+    LoongarchPICState *lps = LOONGARCH_PIC(dev);
+    uint64_t pch_pic_base = VIRT_PCH_REG_BASE;
+    int ret;
+
+    ret = kvm_create_device(kvm_state, KVM_DEV_TYPE_LOONGARCH_PCHPIC, false);
+    if (ret < 0) {
+        fprintf(stderr, "Create KVM_LOONGARCH_PCHPIC failed: %s\n",
+                strerror(-ret));
+        abort();
+    }
+
+    lps->dev_fd = ret;
+    ret = kvm_device_access(lps->dev_fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_CTRL,
+                            KVM_DEV_LOONGARCH_PCH_PIC_CTRL_INIT,
+                            &pch_pic_base, true, NULL);
+    if (ret < 0) {
+        fprintf(stderr, "KVM_LOONGARCH_PCH_PIC_INIT failed: %s\n",
+                strerror(-ret));
+        abort();
+    }
+}