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99d09dd328
due to recent change introduced by: "pcihp: reduce number of device check events" 'up' field is cleared right after it's read. This is incompatible with legacy BIOS ACPI code where PCNF ACPI method reads this field 32 times. To make pci_read mmio callback compatible with legacy 'up' behavior, pcihp code will need to know in which mode it runs add 'legacy_piix' field to AcpiPciHpState structure and alter register behavior accordingly. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
/*
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* QEMU<->ACPI BIOS PCI hotplug interface
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*
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* QEMU supports PCI hotplug via ACPI. This module
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* implements the interface between QEMU and the ACPI BIOS.
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* Interface specification - see docs/specs/acpi_pci_hotplug.txt
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*
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* Copyright (c) 2013, Red Hat Inc, Michael S. Tsirkin (mst@redhat.com)
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* Copyright (c) 2006 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2 as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#ifndef HW_ACPI_PCIHP_H
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#define HW_ACPI_PCIHP_H
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#include <inttypes.h>
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#include <qemu/typedefs.h>
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#include "hw/pci/pci.h" /* for PCIHotplugState */
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typedef struct AcpiPciHpPciStatus {
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uint32_t up;
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uint32_t down;
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uint32_t hotplug_enable;
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uint32_t device_present;
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} AcpiPciHpPciStatus;
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#define ACPI_PCIHP_PROP_BSEL "acpi-pcihp-bsel"
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#define ACPI_PCIHP_MAX_HOTPLUG_BUS 256
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typedef struct AcpiPciHpState {
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AcpiPciHpPciStatus acpi_pcihp_pci_status[ACPI_PCIHP_MAX_HOTPLUG_BUS];
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uint32_t hotplug_select;
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PCIBus *root;
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MemoryRegion io;
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bool legacy_piix;
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} AcpiPciHpState;
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void acpi_pcihp_init(AcpiPciHpState *, PCIBus *root,
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MemoryRegion *address_space_io, bool bridges_enabled);
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/* Invoke on device hotplug */
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int acpi_pcihp_device_hotplug(AcpiPciHpState *, PCIDevice *,
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PCIHotplugState state);
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/* Called on reset */
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void acpi_pcihp_reset(AcpiPciHpState *s);
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extern const VMStateDescription vmstate_acpi_pcihp_pci_status;
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#define VMSTATE_PCI_HOTPLUG(pcihp, state, test_pcihp) \
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VMSTATE_UINT32_TEST(pcihp.hotplug_select, state, \
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test_pcihp), \
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VMSTATE_STRUCT_ARRAY_TEST(pcihp.acpi_pcihp_pci_status, state, \
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ACPI_PCIHP_MAX_HOTPLUG_BUS, \
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test_pcihp, 1, \
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vmstate_acpi_pcihp_pci_status, \
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AcpiPciHpPciStatus)
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#endif
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