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[Qemu-arm] [PATCH] target/arm : add pvpanic mmio device


From: Peng Hao
Subject: [Qemu-arm] [PATCH] target/arm : add pvpanic mmio device
Date: Wed, 17 Oct 2018 17:20:49 +0800

From: root <address@hidden>

Add pvpanic mmio device that is similar to x86's pvpanic device.

Signed-off-by: Peng Hao <address@hidden>
---
 default-configs/arm-softmmu.mak |  2 +-
 hw/arm/virt.c                   | 21 ++++++++++++
 hw/misc/Makefile.objs           |  1 +
 hw/misc/pvpanic-mmio.c          | 76 +++++++++++++++++++++++++++++++++++++++++
 include/hw/arm/virt.h           |  1 +
 include/hw/misc/pvpanic-mmio.h  | 12 +++++++
 6 files changed, 112 insertions(+), 1 deletion(-)
 create mode 100644 hw/misc/pvpanic-mmio.c
 create mode 100644 include/hw/misc/pvpanic-mmio.h

diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index 2420491..4713c92 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -43,7 +43,7 @@ CONFIG_USB_MUSB=y
 CONFIG_USB_EHCI_SYSBUS=y
 CONFIG_PLATFORM_BUS=y
 CONFIG_VIRTIO_MMIO=y
-
+CONFIG_PVPANIC_MMIO=y
 CONFIG_ARM11MPCORE=y
 CONFIG_A9MPCORE=y
 CONFIG_A15MPCORE=y
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index a472566..ab41128 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -140,6 +140,7 @@ static const MemMapEntry a15memmap[] = {
     [VIRT_UART] =               { 0x09000000, 0x00001000 },
     [VIRT_RTC] =                { 0x09010000, 0x00001000 },
     [VIRT_FW_CFG] =             { 0x09020000, 0x00000018 },
+    [VIRT_PVPANIC_MMIO] =       { 0x09020018, 0x00000002 },
     [VIRT_GPIO] =               { 0x09030000, 0x00001000 },
     [VIRT_SECURE_UART] =        { 0x09040000, 0x00001000 },
     [VIRT_SMMU] =               { 0x09050000, 0x00020000 },
@@ -798,6 +799,24 @@ static void create_gpio(const VirtMachineState *vms, 
qemu_irq *pic)
     g_free(nodename);
 }
 
+static void create_pvpanic_device(const VirtMachineState *vms)
+{
+    char *nodename;
+    hwaddr base = vms->memmap[VIRT_PVPANIC_MMIO].base;
+    hwaddr size = vms->memmap[VIRT_PVPANIC_MMIO].size;
+
+    sysbus_create_simple("pvpanic-mmio", base, NULL);
+
+    nodename = g_strdup_printf("/address@hidden" PRIx64, base);
+    qemu_fdt_add_subnode(vms->fdt, nodename);
+    qemu_fdt_setprop_string(vms->fdt, nodename,
+                            "compatible", "pvpanic,mmio");
+    qemu_fdt_setprop_sized_cells(vms->fdt, nodename, "reg",
+                                 2, base, 2, size);
+    g_free(nodename);
+
+}
+
 static void create_virtio_devices(const VirtMachineState *vms, qemu_irq *pic)
 {
     int i;
@@ -1544,6 +1563,8 @@ static void machvirt_init(MachineState *machine)
 
     create_pcie(vms, pic);
 
+    create_pvpanic_device(vms);
+
     create_gpio(vms, pic);
 
     /* Create mmio transports, so the user can create virtio backends
diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs
index 6d50b03..6326260 100644
--- a/hw/misc/Makefile.objs
+++ b/hw/misc/Makefile.objs
@@ -71,6 +71,7 @@ obj-$(CONFIG_IOTKIT_SYSCTL) += iotkit-sysctl.o
 obj-$(CONFIG_IOTKIT_SYSINFO) += iotkit-sysinfo.o
 
 obj-$(CONFIG_PVPANIC) += pvpanic.o
+obj-$(CONFIG_PVPANIC_MMIO) += pvpanic-mmio.o
 obj-$(CONFIG_HYPERV_TESTDEV) += hyperv_testdev.o
 obj-$(CONFIG_AUX) += auxbus.o
 obj-$(CONFIG_ASPEED_SOC) += aspeed_scu.o aspeed_sdmc.o
diff --git a/hw/misc/pvpanic-mmio.c b/hw/misc/pvpanic-mmio.c
new file mode 100644
index 0000000..c7f373e
--- /dev/null
+++ b/hw/misc/pvpanic-mmio.c
@@ -0,0 +1,76 @@
+#include "qemu/osdep.h"
+#include "sysemu/sysemu.h"
+#include "qemu/log.h"
+#include "hw/misc/pvpanic-mmio.h"
+
+#define PVPANIC_MMIO_FEAT_CRASHED      0
+
+#define PVPANIC_MMIO_CRASHED        (1 << PVPANIC_MMIO_FEAT_CRASHED)
+
+static void handle_mmio_event(int event)
+{
+    static bool logged;
+
+    if (event & ~PVPANIC_MMIO_CRASHED && !logged) {
+        qemu_log_mask(LOG_GUEST_ERROR, "pvpanic-mmio: unknown event %#x.\n", 
event);
+        logged = true;
+    }
+
+    if (event & PVPANIC_MMIO_CRASHED) {
+        qemu_system_guest_panicked(NULL);
+        return;
+    }
+}
+
+static uint64_t pvpanic_mmio_read(void *opaque, hwaddr addr, unsigned size)
+{
+    return -1;
+}
+
+static void pvpanic_mmio_write(void *opaque, hwaddr addr, uint64_t value,
+                                 unsigned size)
+{
+   handle_mmio_event(value);
+}
+
+static const MemoryRegionOps pvpanic_mmio_ops = {
+    .read = pvpanic_mmio_read,
+    .write = pvpanic_mmio_write,
+    .impl = {
+        .min_access_size = 1,
+        .max_access_size = 2,
+    },
+};
+
+
+static void pvpanic_mmio_initfn(Object *obj)
+{
+    PVPanicState *s = PVPANIC_MMIO_DEVICE(obj);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+
+    memory_region_init_io(&s->mmio, OBJECT(s), &pvpanic_mmio_ops, s,
+                          "pvpanic-mmio", 2);
+    sysbus_init_mmio(sbd, &s->mmio);
+}
+
+static void pvpanic_mmio_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+}
+
+static TypeInfo pvpanic_mmio_info = {
+    .name          = TYPE_PVPANIC_MMIO,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(PVPanicState),
+    .instance_init = pvpanic_mmio_initfn,
+    .class_init    = pvpanic_mmio_class_init,
+};
+
+static void pvpanic_mmio_register_types(void)
+{
+    type_register_static(&pvpanic_mmio_info);
+}
+
+type_init(pvpanic_mmio_register_types)
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index 4cc57a7..61cc310 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -70,6 +70,7 @@ enum {
     VIRT_MMIO,
     VIRT_RTC,
     VIRT_FW_CFG,
+    VIRT_PVPANIC_MMIO,
     VIRT_PCIE,
     VIRT_PCIE_MMIO,
     VIRT_PCIE_PIO,
diff --git a/include/hw/misc/pvpanic-mmio.h b/include/hw/misc/pvpanic-mmio.h
new file mode 100644
index 0000000..2e6bec3
--- /dev/null
+++ b/include/hw/misc/pvpanic-mmio.h
@@ -0,0 +1,12 @@
+#ifndef HW_MISC_PVPANIC_H
+#define HW_MISC_PVPANIC_H
+#include "hw/sysbus.h"
+#define TYPE_PVPANIC_MMIO "pvpanic-mmio"
+#define PVPANIC_MMIO_DEVICE(obj)    \
+    OBJECT_CHECK(PVPanicState, (obj), TYPE_PVPANIC_MMIO)
+#endif
+
+typedef struct PVPanicState {
+    SysBusDevice parent_obj;
+    MemoryRegion mmio;
+} PVPanicState;
-- 
1.8.3.1




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