From 9fa99d2519cbf71f871e46871df12cb446dc1c3e Mon Sep 17 00:00:00 2001 From: Marcel Apfelbaum Date: Sat, 11 Nov 2017 17:25:00 +0200 Subject: hw/pci-host: Fix x86 Host Bridges 64bit PCI hole Currently there is no MMIO range over 4G reserved for PCI hotplug. Since the 32bit PCI hole depends on the number of cold-plugged PCI devices and other factors, it is very possible is too small to hotplug PCI devices with large BARs. Fix it by reserving 2G for I4400FX chipset in order to comply with older Win32 Guest OSes and 32G for Q35 chipset. Even if the new defaults of pci-hole64-size will appear in "info qtree" also for older machines, the property was not implemented so no changes will be visible to guests. Note this is a regression since prev QEMU versions had some range reserved for 64bit PCI hotplug. Reviewed-by: Laszlo Ersek Reviewed-by: Gerd Hoffmann Signed-off-by: Marcel Apfelbaum Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- include/hw/i386/pc.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'include/hw/i386') diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 087d184ef5..ef438bd765 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -238,7 +238,6 @@ void pc_guest_info_init(PCMachineState *pcms); #define PCI_HOST_PROP_PCI_HOLE64_SIZE "pci-hole64-size" #define PCI_HOST_BELOW_4G_MEM_SIZE "below-4g-mem-size" #define PCI_HOST_ABOVE_4G_MEM_SIZE "above-4g-mem-size" -#define DEFAULT_PCI_HOLE64_SIZE (~0x0ULL) void pc_pci_as_mapping_init(Object *owner, MemoryRegion *system_memory, @@ -249,6 +248,7 @@ void pc_memory_init(PCMachineState *pcms, MemoryRegion *system_memory, MemoryRegion *rom_memory, MemoryRegion **ram_memory); +uint64_t pc_pci_hole64_start(void); qemu_irq pc_allocate_cpu_irq(void); DeviceState *pc_vga_init(ISABus *isa_bus, PCIBus *pci_bus); void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi, @@ -375,6 +375,14 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *); .driver = TYPE_X86_CPU,\ .property = "x-hv-max-vps",\ .value = "0x40",\ + },{\ + .driver = "i440FX-pcihost",\ + .property = "x-pci-hole64-fix",\ + .value = "off",\ + },{\ + .driver = "q35-pcihost",\ + .property = "x-pci-hole64-fix",\ + .value = "off",\ }, #define PC_COMPAT_2_9 \ -- cgit v1.2.3