7feb640cf3
This patch addresses the issue fully described here: http://lists.nongnu.org/archive/html/qemu-devel/2013-02/msg01804.html Linux kernels prior to 2.6.36 do not disable the PCI device during enumeration process. Since lower and higher parts of a 64bit BAR are programmed separately this leads to qemu receiving a request to occupy a completely wrong address region for a short period of time. We have found that the boot process screws up completely if kvm-apic range is overlapped even for a short period of time (it is fine for other regions though). This patch raises the priority of the kvm-apic memory region, so it is never pushed out by PCI devices. The patch is quite safe as it does not touch memory manager. Signed-off-by: Alexey Korolev <akorolex@gmail.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
#ifndef HW_SYSBUS_H
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#define HW_SYSBUS_H 1
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/* Devices attached directly to the main system bus. */
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#include "qdev.h"
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#include "exec/memory.h"
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#define QDEV_MAX_MMIO 32
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#define QDEV_MAX_PIO 32
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#define QDEV_MAX_IRQ 512
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#define TYPE_SYSTEM_BUS "System"
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#define SYSTEM_BUS(obj) OBJECT_CHECK(IDEBus, (obj), TYPE_IDE_BUS)
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typedef struct SysBusDevice SysBusDevice;
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#define TYPE_SYS_BUS_DEVICE "sys-bus-device"
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#define SYS_BUS_DEVICE(obj) \
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OBJECT_CHECK(SysBusDevice, (obj), TYPE_SYS_BUS_DEVICE)
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#define SYS_BUS_DEVICE_CLASS(klass) \
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OBJECT_CLASS_CHECK(SysBusDeviceClass, (klass), TYPE_SYS_BUS_DEVICE)
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#define SYS_BUS_DEVICE_GET_CLASS(obj) \
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OBJECT_GET_CLASS(SysBusDeviceClass, (obj), TYPE_SYS_BUS_DEVICE)
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typedef struct SysBusDeviceClass {
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DeviceClass parent_class;
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int (*init)(SysBusDevice *dev);
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} SysBusDeviceClass;
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struct SysBusDevice {
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DeviceState qdev;
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int num_irq;
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qemu_irq irqs[QDEV_MAX_IRQ];
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qemu_irq *irqp[QDEV_MAX_IRQ];
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int num_mmio;
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struct {
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hwaddr addr;
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MemoryRegion *memory;
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} mmio[QDEV_MAX_MMIO];
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int num_pio;
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pio_addr_t pio[QDEV_MAX_PIO];
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};
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/* Macros to compensate for lack of type inheritance in C. */
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#define FROM_SYSBUS(type, dev) DO_UPCAST(type, busdev, dev)
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void *sysbus_new(void);
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void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory);
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MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n);
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void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p);
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void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target);
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void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size);
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void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq);
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void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr);
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void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
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unsigned priority);
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void sysbus_add_memory(SysBusDevice *dev, hwaddr addr,
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MemoryRegion *mem);
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void sysbus_add_memory_overlap(SysBusDevice *dev, hwaddr addr,
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MemoryRegion *mem, unsigned priority);
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void sysbus_del_memory(SysBusDevice *dev, MemoryRegion *mem);
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void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
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MemoryRegion *mem);
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void sysbus_del_io(SysBusDevice *dev, MemoryRegion *mem);
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MemoryRegion *sysbus_address_space(SysBusDevice *dev);
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/* Legacy helper function for creating devices. */
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DeviceState *sysbus_create_varargs(const char *name,
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hwaddr addr, ...);
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DeviceState *sysbus_try_create_varargs(const char *name,
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hwaddr addr, ...);
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static inline DeviceState *sysbus_create_simple(const char *name,
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hwaddr addr,
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qemu_irq irq)
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{
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return sysbus_create_varargs(name, addr, irq, NULL);
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}
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static inline DeviceState *sysbus_try_create_simple(const char *name,
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hwaddr addr,
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qemu_irq irq)
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{
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return sysbus_try_create_varargs(name, addr, irq, NULL);
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}
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#endif /* !HW_SYSBUS_H */
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