hw/misc/pvpanic: add PCI interface support

Add PCI interface support for PVPANIC device. Create a new file pvpanic-pci.c
where the PCI specific routines reside and update the build system with the new
files and config structure.

Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

docs/specs/pci-ids.txt

@@ -64,6 +64,7 @@ PCI devices (other than virtio):
 1b36:000d  PCI xhci usb host adapter
 1b36:000f  mdpy (mdev sample device), linux/samples/vfio-mdev/mdpy.c
 1b36:0010  PCIe NVMe device (-device nvme)
+1b36:0011  PCI PVPanic device (-device pvpanic-pci)
 
 All these devices are documented in docs/specs.
 

hw/misc/Kconfig

@@ -124,6 +124,12 @@ config IOTKIT_SYSINFO
 config PVPANIC_COMMON
     bool
 
+config PVPANIC_PCI
+    bool
+    default y if PCI_DEVICES
+    depends on PCI
+    select PVPANIC_COMMON
+
 config PVPANIC_ISA
     bool
     depends on ISA_BUS

hw/misc/meson.build

@@ -100,6 +100,7 @@ softmmu_ss.add(when: 'CONFIG_ARMSSE_CPUID', if_true: files('armsse-cpuid.c'))
 softmmu_ss.add(when: 'CONFIG_ARMSSE_MHU', if_true: files('armsse-mhu.c'))
 
 softmmu_ss.add(when: 'CONFIG_PVPANIC_ISA', if_true: files('pvpanic-isa.c'))
+softmmu_ss.add(when: 'CONFIG_PVPANIC_PCI', if_true: files('pvpanic-pci.c'))
 softmmu_ss.add(when: 'CONFIG_AUX', if_true: files('auxbus.c'))
 softmmu_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files('aspeed_scu.c', 'aspeed_sdmc.c', 'aspeed_xdma.c'))
 softmmu_ss.add(when: 'CONFIG_MSF2', if_true: files('msf2-sysreg.c'))

hw/misc/pvpanic-pci.c

@@ -0,0 +1,94 @@
+/*
+ * QEMU simulated PCI pvpanic device.
+ *
+ * Copyright (C) 2020 Oracle
+ *
+ * Authors:
+ *     Mihai Carabas <mihai.carabas@oracle.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+#include "sysemu/runstate.h"
+
+#include "hw/nvram/fw_cfg.h"
+#include "hw/qdev-properties.h"
+#include "migration/vmstate.h"
+#include "hw/misc/pvpanic.h"
+#include "qom/object.h"
+#include "hw/pci/pci.h"
+
+OBJECT_DECLARE_SIMPLE_TYPE(PVPanicPCIState, PVPANIC_PCI_DEVICE)
+
+/*
+ * PVPanicPCIState for PCI device
+ */
+typedef struct PVPanicPCIState {
+    PCIDevice dev;
+    PVPanicState pvpanic;
+} PVPanicPCIState;
+
+static const VMStateDescription vmstate_pvpanic_pci = {
+    .name = "pvpanic-pci",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_PCI_DEVICE(dev, PVPanicPCIState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static void pvpanic_pci_realizefn(PCIDevice *dev, Error **errp)
+{
+    PVPanicPCIState *s = PVPANIC_PCI_DEVICE(dev);
+    PVPanicState *ps = &s->pvpanic;
+
+    pvpanic_setup_io(&s->pvpanic, DEVICE(s), 2);
+
+    pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &ps->mr);
+}
+
+static Property pvpanic_pci_properties[] = {
+    DEFINE_PROP_UINT8("events", PVPanicPCIState, pvpanic.events, PVPANIC_PANICKED | PVPANIC_CRASHLOADED),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void pvpanic_pci_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
+
+    device_class_set_props(dc, pvpanic_pci_properties);
+
+    pc->realize = pvpanic_pci_realizefn;
+    pc->vendor_id = PCI_VENDOR_ID_REDHAT;
+    pc->device_id = PCI_DEVICE_ID_REDHAT_PVPANIC;
+    pc->revision = 1;
+    pc->class_id = PCI_CLASS_SYSTEM_OTHER;
+    dc->vmsd = &vmstate_pvpanic_pci;
+
+    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+}
+
+static TypeInfo pvpanic_pci_info = {
+    .name          = TYPE_PVPANIC_PCI_DEVICE,
+    .parent        = TYPE_PCI_DEVICE,
+    .instance_size = sizeof(PVPanicPCIState),
+    .class_init    = pvpanic_pci_class_init,
+    .interfaces = (InterfaceInfo[]) {
+        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
+        { }
+    }
+};
+
+static void pvpanic_register_types(void)
+{
+    type_register_static(&pvpanic_pci_info);
+}
+
+type_init(pvpanic_register_types);

include/hw/misc/pvpanic.h

@@ -18,6 +18,7 @@
 #include "qom/object.h"
 
 #define TYPE_PVPANIC_ISA_DEVICE "pvpanic"
+#define TYPE_PVPANIC_PCI_DEVICE "pvpanic-pci"
 
 #define PVPANIC_IOPORT_PROP "ioport"
 

include/hw/pci/pci.h

@@ -107,6 +107,7 @@ extern bool pci_available;
 #define PCI_DEVICE_ID_REDHAT_PCIE_BRIDGE 0x000e
 #define PCI_DEVICE_ID_REDHAT_MDPY        0x000f
 #define PCI_DEVICE_ID_REDHAT_NVME        0x0010
+#define PCI_DEVICE_ID_REDHAT_PVPANIC     0x0011
 #define PCI_DEVICE_ID_REDHAT_QXL         0x0100
 
 #define FMT_PCIBUS                      PRIx64