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2025fc6766
xemu/hw/ppc
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Peter Maydell 2025fc6766 hw/ppc/ppc440_uc.c: Remove incorrect iothread locking from dcr_write_pcie() 
In dcr_write_pcie() we take the iothread lock around a call to
pcie_host_mmcfg_udpate().  This is an incorrect attempt to deal with
the bug fixed in commit 235352ee6e, where we were not taking
the iothread lock before calling device dcr read/write functions.
(It's not sufficient locking, because although the other cases in the
switch statement won't assert, there is no locking which prevents
multiple guest CPUs from trying to access the PPC460EXPCIEState
struct at the same time and corrupting data.)

Unfortunately with commit 235352ee6e we are now trying
to recursively take the iothread lock, which will assert:

  $ qemu-system-ppc -M sam460ex --display none
  **
  ERROR:/home/petmay01/linaro/qemu-from-laptop/qemu/cpus.c:1830:qemu_mutex_lock_iothread_impl: assertion failed: (!qemu_mutex_iothread_locked())
  Aborted (core dumped)

Remove the locking within dcr_write_pcie().

Fixes: 235352ee6e
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20200330125228.24994-1-peter.maydell@linaro.org>
Tested-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2020-04-07 08:55:11 +10:00
..
e500-ccsr.h ppc: do not use ../ in include files 2013-03-01 13:57:33 +01:00
e500.c hw/ppc/e500.c: Handle qemu_find_file() failure 2020-04-07 08:55:10 +10:00
e500.h platform-bus-device: use device plug callback instead of machine_done notifier 2018-05-10 18:10:56 +01:00
e500plat.c ppc/e500: use memdev for RAM 2020-02-19 16:50:00 +00:00
fdt.c target/ppc: Split page size information into a separate allocation 2018-04-27 18:05:22 +10:00
fw_cfg.c hw/ppc: Implement fw_cfg_arch_key_name() 2019-05-23 14:10:31 +02:00
Kconfig ppc/pnv: Fix PCI_EXPRESS dependency 2020-02-21 09:15:03 +11:00
mac_newworld.c Pull request 2020-03-19 11:14:24 +00:00
mac_oldworld.c Pull request 2020-03-19 11:14:24 +00:00
mac.h ide: Include hw/ide/internal a bit less outside hw/ide/ 2019-08-16 13:31:52 +02:00
Makefile.objs spapr: Add NVDIMM device support 2020-02-21 09:15:04 +11:00
mpc8544_guts.c sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
mpc8544ds.c ppc/e500: use memdev for RAM 2020-02-19 16:50:00 +00:00
pnv_bmc.c ppc/pnv: Add a "pnor" const link property to the BMC internal simulator 2020-01-08 11:01:59 +11:00
pnv_core.c ppc/pnv: change the PowerNV machine devices to be non user creatable 2020-02-02 14:07:57 +11:00
pnv_homer.c ppc/pnv: change the PowerNV machine devices to be non user creatable 2020-02-02 14:07:57 +11:00
pnv_lpc.c hw/ppc/pnv: Fix typo in comment 2020-03-17 09:41:14 +11:00
pnv_occ.c ppc/pnv: change the PowerNV machine devices to be non user creatable 2020-02-02 14:07:57 +11:00
pnv_pnor.c ppc/pnv: improve error logging when a PNOR update fails 2020-02-02 14:07:57 +11:00
pnv_psi.c add device_legacy_reset function to prepare for reset api change 2020-01-30 16:02:03 +00:00
pnv_xscom.c ppc/pnv: Introduce PnvChipClass::xscom_pcba() method 2019-12-17 10:59:11 +11:00
pnv.c Merge tag 'patchew/20200219160953.13771-1-imammedo@redhat.com' of https://github.com/patchew-project/qemu into HEAD 2020-02-25 09:19:00 +01:00
ppc4xx_devs.c ppc/{ppc440_bamboo, sam460ex}: use memdev for RAM 2020-02-19 16:50:00 +00:00
ppc4xx_pci.c Include hw/hw.h exactly where needed 2019-08-16 13:31:52 +02:00
ppc405_boards.c ppc/ppc405_boards: Remove unnecessary NULL check 2020-03-24 11:56:37 +11:00
ppc405_uc.c Include hw/boards.h a bit less 2019-08-16 13:31:53 +02:00
ppc405.h ppc4xx: Export ECB and PLB emulation 2017-09-08 09:30:55 +10:00
ppc440_bamboo.c ppc/{ppc440_bamboo, sam460ex}: use memdev for RAM 2020-02-19 16:50:00 +00:00
ppc440_pcix.c Include hw/hw.h exactly where needed 2019-08-16 13:31:52 +02:00
ppc440_uc.c hw/ppc/ppc440_uc.c: Remove incorrect iothread locking from dcr_write_pcie() 2020-04-07 08:55:11 +10:00
ppc440.h ppc440_uc: Basic emulation of PPC440 DMA controller 2018-07-03 09:56:52 +10:00
ppc_booke.c sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
ppc.c hw/ppc/prep: Remove the deprecated "prep" machine and the OpenHackware BIOS 2020-02-02 14:07:57 +11:00
ppce500_spin.c Clean up inclusion of sysemu/sysemu.h 2019-08-16 13:31:53 +02:00
prep_systemio.c qdev: set properties with device_class_set_props() 2020-01-24 20:59:15 +01:00
prep.c hw/ide: Remove unneeded inclusion of hw/ide.h 2020-03-17 12:22:36 -04:00
rs6000_mc.c qdev: set properties with device_class_set_props() 2020-01-24 20:59:15 +01:00
sam460ex.c ppc/{ppc440_bamboo, sam460ex}: use memdev for RAM 2020-02-19 16:50:00 +00:00
spapr_caps.c ppc/spapr: KVM FWNMI should not be enabled until guest requests it 2020-04-07 08:55:10 +10:00
spapr_cpu_core.c ppc/spapr: Move GPRs setup to one place 2020-03-17 15:08:50 +11:00
spapr_drc.c qom/object: enable setter for uint types 2020-03-16 23:02:23 +01:00
spapr_events.c ppc/spapr: Don't kill the guest if a recovered FWNMI machine check delivery fails 2020-04-07 08:55:10 +10:00
spapr_hcall.c spapr: Fix memory leak in h_client_architecture_support() 2020-03-24 11:56:37 +11:00
spapr_iommu.c vmstate: replace DeviceState with VMStateIf 2020-01-06 18:41:32 +04:00
spapr_irq.c spapr, pnv, xive: Add a "xive-fabric" link to the XIVE router 2020-01-08 11:01:59 +11:00
spapr_nvdimm.c spapr: Fix Coverity warning while validating nvdimm options 2020-03-17 09:41:14 +11:00
spapr_ovec.c spapr: Rename DT functions to newer naming convention 2020-03-17 17:00:19 +11:00
spapr_pci_nvlink2.c error: Clean up unusual names of Error * variables 2019-12-18 08:36:15 +01:00
spapr_pci_vfio.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
spapr_pci.c spapr: Fix failure path for attempting to hot unplug PCI bridges 2020-04-07 08:55:11 +10:00
spapr_rng.c qdev: set properties with device_class_set_props() 2020-01-24 20:59:15 +01:00
spapr_rtas_ddw.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
spapr_rtas.c ppc/spapr: Add FWNMI machine check delivery warnings 2020-04-07 08:55:10 +10:00
spapr_rtc.c Include migration/vmstate.h less 2019-08-16 13:31:52 +02:00
spapr_tpm_proxy.c qdev: set properties with device_class_set_props() 2020-01-24 20:59:15 +01:00
spapr_vio.c spapr: Implement get_dt_compatible() callback 2020-02-02 14:07:57 +11:00
spapr.c ppc patch queue 2020-03-17 2020-03-18 15:07:57 +00:00
trace-events spapr: Remove unhelpful tracepoints from spapr_irq_free_xics() 2019-10-04 19:08:22 +10:00
virtex_ml507.c Merge tag 'patchew/20200219160953.13771-1-imammedo@redhat.com' of https://github.com/patchew-project/qemu into HEAD 2020-02-25 09:19:00 +01:00