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8601b4f11d
xemu/hw/ppc
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Shivaprasad G Bhat 8601b4f11d spapr: nvdimm: Introduce spapr-nvdimm device 
If the device backend is not persistent memory for the nvdimm, there is
need for explicit IO flushes on the backend to ensure persistence.

On SPAPR, the issue is addressed by adding a new hcall to request for
an explicit flush from the guest when the backend is not pmem. So, the
approach here is to convey when the hcall flush is required in a device
tree property. The guest once it knows the device backend is not pmem,
makes the hcall whenever flush is required.

To set the device tree property, a new PAPR specific device type inheriting
the nvdimm device is implemented. When the backend doesn't have pmem=on
the device tree property "ibm,hcall-flush-required" is set, and the guest
makes hcall H_SCM_FLUSH requesting for an explicit flush. The new device
has boolean property pmem-override which when "on" advertises the device
tree property even when pmem=on for the backend. The flush function
invokes the fdatasync or pmem_persist() based on the type of backend.

The vmstate structures are made part of the spapr-nvdimm device object.
The patch attempts to keep the migration compatibility between source and
destination while rejecting the incompatibles ones with failures.

Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <164396256092.109112.17933240273840803354.stgit@ltczzess4.aus.stglabs.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-02-18 08:34:14 +01:00
..
e500-ccsr.h Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
e500.c qdev: Make DeviceState.id independent of QemuOpts 2021-10-15 16:06:35 +02:00
e500.h Use OBJECT_DECLARE_TYPE when possible 2020-09-18 14:12:32 -04:00
e500plat.c hw/ppc/e500plat: Only try to add valid dynamic sysbus devices to platform bus 2021-04-06 11:49:14 +01:00
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 hw/ppc/Kconfig: Add dependency PEGASOS2 -> ATI_VGA 2021-07-20 20:10:20 +02:00
mac_newworld.c hw/ppc/mac.h: Remove MAX_CPUS macro 2021-12-17 17:57:12 +01:00
mac_oldworld.c hw/ppc/mac.h: Remove MAX_CPUS macro 2021-12-17 17:57:12 +01:00
mac.h hw/ppc/mac.h: Remove MAX_CPUS macro 2021-12-17 17:57:12 +01:00
meson.build spapr: Implement Open Firmware client interface 2021-07-09 10:38:19 +10:00
mpc8544_guts.c ppc/ppc4xx: Convert printfs() 2022-01-04 07:55:34 +01:00
mpc8544ds.c ppc/e500: use memdev for RAM 2020-02-19 16:50:00 +00:00
pef.c ppc/pef.c: initialize cgs->ready in kvmppc_svm_init() 2021-06-03 18:10:31 +10:00
pegasos2.c ppc/pegasos2: Suppress warning when qtest enabled 2021-11-09 10:32:52 +11:00
pnv_bmc.c Various spelling fixes 2021-03-09 21:19:10 +01:00
pnv_core.c ppc/pnv: Rename "id" to "quad-id" in PnvQuad 2021-09-29 19:37:38 +10:00
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 ppc/pnv: Introduce a LPC FW memory region attribute to map the PNOR 2021-02-10 10:43:50 +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: Fix check on block device before updating drive contents 2021-11-09 10:32:52 +11:00
pnv_psi.c ppc patch queue 2021-05-04 2021-05-05 20:29:14 +01:00
pnv_xscom.c ppc/pnv: Add a comment on the "primary-topology-index" property 2021-09-29 19:37:38 +10:00
pnv.c ppc/pnv: Introduce user creatable pnv-phb4 devices 2022-01-12 11:28:27 +01:00
ppc4xx_devs.c ppc/ppc4xx: Convert printfs() 2022-01-04 07:55:34 +01:00
ppc4xx_pci.c ppc/ppc4xx: Convert printfs() 2022-01-04 07:55:34 +01:00
ppc405_boards.c ppc/ppc405: Fix boot from kernel 2021-12-17 17:57:17 +01:00
ppc405_uc.c ppc/ppc405: Fix timer initialization 2022-01-04 07:55:34 +01:00
ppc405.h ppc/ppc405: Fix bi_pci_enetaddr2 field in U-Boot board information 2021-12-17 17:57:17 +01:00
ppc440_bamboo.c Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
ppc440_pcix.c Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
ppc440_uc.c Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
ppc440.h ppc440_uc: Basic emulation of PPC440 DMA controller 2018-07-03 09:56:52 +10:00
ppc_booke.c hw: Do not include qemu/log.h if it is not necessary 2021-05-02 17:24:50 +02:00
ppc.c target/ppc: Remove PowerPC 601 CPUs 2022-02-09 09:08:55 +01:00
ppce500_spin.c powerpc tcg: Fix Lesser GPL version number 2020-11-15 16:38:50 +01:00
prep_systemio.c prep: add ppc-parity write method 2021-02-08 15:15:32 +01:00
prep.c target/ppc: Remove PowerPC 601 CPUs 2022-02-09 09:08:55 +01:00
rs6000_mc.c Do not include hw/boards.h if it's not really necessary 2021-05-02 17:24:51 +02:00
sam460ex.c Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
spapr_caps.c target/ppc: Support for H_RPT_INVALIDATE hcall 2021-07-09 11:01:06 +10:00
spapr_cpu_core.c spapr: Force 32bit when resetting a core 2022-01-28 13:15:01 +01:00
spapr_drc.c spapr: use DEVICE_UNPLUG_GUEST_ERROR to report unplug errors 2021-09-30 12:26:06 +10:00
spapr_events.c spapr: Explain purpose of ->fwnmi_migration_blocker more clearly 2021-08-26 17:15:28 +02:00
spapr_hcall.c spapr: move FORM1 verifications to post CAS 2021-09-30 12:26:06 +10:00
spapr_iommu.c Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
spapr_irq.c spapr/xics: Drop unused argument to xics_kvm_has_broken_disconnect() 2020-12-14 15:50:55 +11:00
spapr_numa.c spapr_numa.c: fix FORM1 distance-less nodes 2021-11-10 13:48:13 +01:00
spapr_nvdimm.c spapr: nvdimm: Introduce spapr-nvdimm device 2022-02-18 08:34:14 +01:00
spapr_ovec.c spapr: Improve handling of memory unplug with old guests 2021-01-19 10:20:29 +11:00
spapr_pci_nvlink2.c pci: Export pci_for_each_device_under_bus*() 2021-11-01 19:36:11 -04:00
spapr_pci_vfio.c pci: Export pci_for_each_device_under_bus*() 2021-11-01 19:36:11 -04:00
spapr_pci.c pci: Export pci_for_each_device_under_bus*() 2021-11-01 19:36:11 -04:00
spapr_rng.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
spapr_rtas_ddw.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
spapr_rtas.c spapr: Set LPCR to current AIL mode when starting a new CPU 2021-06-03 13:22:06 +10:00
spapr_rtc.c rtc: Move RTC function prototypes to their own header 2022-01-28 14:29:46 +00:00
spapr_softmmu.c target/ppc: fix Hash64 MMU update of PTE bit R 2021-11-29 21:00:08 +01:00
spapr_tpm_proxy.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
spapr_vio.c qbus: Rename qbus_create() to qbus_new() 2021-09-30 13:44:08 +01:00
spapr_vof.c spapr: Force 32bit when resetting a core 2022-01-28 13:15:01 +01:00
spapr.c spapr: nvdimm: Implement H_SCM_FLUSH hcall 2022-02-18 08:34:14 +01:00
trace-events ppc/ppc405: Restore TCR and STR write handlers 2022-01-04 07:55:34 +01:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
virtex_ml507.c Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
vof.c hw/ppc/vof: Add missing includes 2022-01-28 13:15:03 +01:00