mirror of
https://github.com/qemu/qemu.git
synced 2024-11-25 11:53:39 +08:00
1de5345927
While testing q35 live migration, I found that the migration would abort with
the following error: "Unknown savevm section type 76".
The error is due to this check failing in 'vmstate_load_state()':
while(field->name) {
if ((field->field_exists &&
field->field_exists(opaque, version_id)) ||
(!field->field_exists &&
field->version_id <= version_id)) {
The VMSTATE_PCIE_DEVICE() currently has a 'version_id' set to 2. However,
'version_id' in the above check is 1. And thus we fail to load the pcie device
field. Further the code returns to 'qemu_loadvm_state()' which produces the
error that I saw.
I'm proposing to fix this by simply dropping the 'version_id' field from
VMSTATE_PCIE_DEVICE(). VMSTATE_PCI_DEVICE() defines no such field and further
the vmstate_pcie_device that VMSTATE_PCI_DEVICE() refers to is already
versioned. Thus, any versioning issues could be detected at the vmsd level.
Taking a step back, I think that the 'field->version_id' should be compared
against a saved version number for the field not the 'version_id'. Futhermore,
once vmstate_load_state() is called recursively on another vmsd, the check of:
if (version_id > vmsd->version_id) {
return -EINVAL;
}
Will never fail since version_id is always equal to vmsd->version_id. So I'm
wondering why we aren't storing the vmsd version id of the source in the
migration stream?
This patch also renames the 'name' field of vmstate_pcie_device from:
PCIDevice -> PCIEDevice to differentiate it from vmstate_pci_device.
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
143 lines
5.8 KiB
C
143 lines
5.8 KiB
C
/*
|
|
* pcie.h
|
|
*
|
|
* Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
|
|
* VA Linux Systems Japan K.K.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef QEMU_PCIE_H
|
|
#define QEMU_PCIE_H
|
|
|
|
#include "hw.h"
|
|
#include "pci_regs.h"
|
|
#include "pcie_regs.h"
|
|
#include "pcie_aer.h"
|
|
|
|
typedef enum {
|
|
/* for attention and power indicator */
|
|
PCI_EXP_HP_IND_RESERVED = PCI_EXP_SLTCTL_IND_RESERVED,
|
|
PCI_EXP_HP_IND_ON = PCI_EXP_SLTCTL_IND_ON,
|
|
PCI_EXP_HP_IND_BLINK = PCI_EXP_SLTCTL_IND_BLINK,
|
|
PCI_EXP_HP_IND_OFF = PCI_EXP_SLTCTL_IND_OFF,
|
|
} PCIExpressIndicator;
|
|
|
|
typedef enum {
|
|
/* these bits must match the bits in Slot Control/Status registers.
|
|
* PCI_EXP_HP_EV_xxx = PCI_EXP_SLTCTL_xxxE = PCI_EXP_SLTSTA_xxx
|
|
*
|
|
* Not all the bits of slot control register match with the ones of
|
|
* slot status. Not some bits of slot status register is used to
|
|
* show status, not to report event occurrence.
|
|
* So such bits must be masked out when checking the software
|
|
* notification condition.
|
|
*/
|
|
PCI_EXP_HP_EV_ABP = PCI_EXP_SLTCTL_ABPE,
|
|
/* attention button pressed */
|
|
PCI_EXP_HP_EV_PDC = PCI_EXP_SLTCTL_PDCE,
|
|
/* presence detect changed */
|
|
PCI_EXP_HP_EV_CCI = PCI_EXP_SLTCTL_CCIE,
|
|
/* command completed */
|
|
|
|
PCI_EXP_HP_EV_SUPPORTED = PCI_EXP_HP_EV_ABP |
|
|
PCI_EXP_HP_EV_PDC |
|
|
PCI_EXP_HP_EV_CCI,
|
|
/* supported event mask */
|
|
|
|
/* events not listed aren't supported */
|
|
} PCIExpressHotPlugEvent;
|
|
|
|
struct PCIExpressDevice {
|
|
/* Offset of express capability in config space */
|
|
uint8_t exp_cap;
|
|
|
|
/* SLOT */
|
|
unsigned int hpev_intx; /* INTx for hot plug event (0-3:INT[A-D]#)
|
|
* default is 0 = INTA#
|
|
* If the chip wants to use other interrupt
|
|
* line, initialize this member with the
|
|
* desired number.
|
|
* If the chip dynamically changes this member,
|
|
* also initialize it when loaded as
|
|
* appropreately.
|
|
*/
|
|
bool hpev_notified; /* Logical AND of conditions for hot plug event.
|
|
Following 6.7.3.4:
|
|
Software Notification of Hot-Plug Events, an interrupt
|
|
is sent whenever the logical and of these conditions
|
|
transitions from false to true. */
|
|
|
|
/* AER */
|
|
uint16_t aer_cap;
|
|
PCIEAERLog aer_log;
|
|
unsigned int aer_intx; /* INTx for error reporting
|
|
* default is 0 = INTA#
|
|
* If the chip wants to use other interrupt
|
|
* line, initialize this member with the
|
|
* desired number.
|
|
* If the chip dynamically changes this member,
|
|
* also initialize it when loaded as
|
|
* appropreately.
|
|
*/
|
|
};
|
|
|
|
/* PCI express capability helper functions */
|
|
int pcie_cap_init(PCIDevice *dev, uint8_t offset, uint8_t type, uint8_t port);
|
|
void pcie_cap_exit(PCIDevice *dev);
|
|
uint8_t pcie_cap_get_type(const PCIDevice *dev);
|
|
void pcie_cap_flags_set_vector(PCIDevice *dev, uint8_t vector);
|
|
uint8_t pcie_cap_flags_get_vector(PCIDevice *dev);
|
|
|
|
void pcie_cap_deverr_init(PCIDevice *dev);
|
|
void pcie_cap_deverr_reset(PCIDevice *dev);
|
|
|
|
void pcie_cap_slot_init(PCIDevice *dev, uint16_t slot);
|
|
void pcie_cap_slot_reset(PCIDevice *dev);
|
|
void pcie_cap_slot_write_config(PCIDevice *dev,
|
|
uint32_t addr, uint32_t val, int len);
|
|
int pcie_cap_slot_post_load(void *opaque, int version_id);
|
|
void pcie_cap_slot_push_attention_button(PCIDevice *dev);
|
|
|
|
void pcie_cap_root_init(PCIDevice *dev);
|
|
void pcie_cap_root_reset(PCIDevice *dev);
|
|
|
|
void pcie_cap_flr_init(PCIDevice *dev);
|
|
void pcie_cap_flr_write_config(PCIDevice *dev,
|
|
uint32_t addr, uint32_t val, int len);
|
|
|
|
void pcie_cap_ari_init(PCIDevice *dev);
|
|
void pcie_cap_ari_reset(PCIDevice *dev);
|
|
bool pcie_cap_is_ari_enabled(const PCIDevice *dev);
|
|
|
|
/* PCI express extended capability helper functions */
|
|
uint16_t pcie_find_capability(PCIDevice *dev, uint16_t cap_id);
|
|
void pcie_add_capability(PCIDevice *dev,
|
|
uint16_t cap_id, uint8_t cap_ver,
|
|
uint16_t offset, uint16_t size);
|
|
|
|
void pcie_ari_init(PCIDevice *dev, uint16_t offset, uint16_t nextfn);
|
|
|
|
extern const VMStateDescription vmstate_pcie_device;
|
|
|
|
#define VMSTATE_PCIE_DEVICE(_field, _state) { \
|
|
.name = (stringify(_field)), \
|
|
.size = sizeof(PCIDevice), \
|
|
.vmsd = &vmstate_pcie_device, \
|
|
.flags = VMS_STRUCT, \
|
|
.offset = vmstate_offset_value(_state, _field, PCIDevice), \
|
|
}
|
|
|
|
#endif /* QEMU_PCIE_H */
|