diff options
| -rw-r--r-- | hw/ppc/spapr_nvdimm.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/hw/ppc/spapr_nvdimm.c b/hw/ppc/spapr_nvdimm.c index ac44e00153..c4c97da5de 100644 --- a/hw/ppc/spapr_nvdimm.c +++ b/hw/ppc/spapr_nvdimm.c @@ -34,6 +34,7 @@ #include "block/thread-pool.h" #include "migration/vmstate.h" #include "qemu/pmem.h" +#include "hw/qdev-properties.h" /* DIMM health bitmap bitmap indicators. Taken from kernel's papr_scm.c */ /* SCM device is unable to persist memory contents */ @@ -57,6 +58,10 @@ OBJECT_DECLARE_TYPE(SpaprNVDIMMDevice, SPAPRNVDIMMClass, SPAPR_NVDIMM) struct SPAPRNVDIMMClass { /* private */ NVDIMMClass parent_class; + + /* public */ + void (*realize)(NVDIMMDevice *dimm, Error **errp); + void (*unrealize)(NVDIMMDevice *dimm, Error **errp); }; bool spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm, @@ -64,6 +69,8 @@ bool spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm, { const MachineClass *mc = MACHINE_GET_CLASS(hotplug_dev); const MachineState *ms = MACHINE(hotplug_dev); + PCDIMMDevice *dimm = PC_DIMM(nvdimm); + MemoryRegion *mr = host_memory_backend_get_memory(dimm->hostmem); g_autofree char *uuidstr = NULL; QemuUUID uuid; int ret; @@ -101,6 +108,14 @@ bool spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm, return false; } + if (object_dynamic_cast(OBJECT(nvdimm), TYPE_SPAPR_NVDIMM) && + (memory_region_get_fd(mr) < 0)) { + error_setg(errp, "spapr-nvdimm device requires the " + "memdev %s to be of memory-backend-file type", + object_get_canonical_path_component(OBJECT(dimm->hostmem))); + return false; + } + return true; } @@ -172,6 +187,20 @@ static int spapr_dt_nvdimm(SpaprMachineState *spapr, void *fdt, "operating-system"))); _FDT(fdt_setprop(fdt, child_offset, "ibm,cache-flush-required", NULL, 0)); + if (object_dynamic_cast(OBJECT(nvdimm), TYPE_SPAPR_NVDIMM)) { + bool is_pmem = false, pmem_override = false; + PCDIMMDevice *dimm = PC_DIMM(nvdimm); + HostMemoryBackend *hostmem = dimm->hostmem; + + is_pmem = object_property_get_bool(OBJECT(hostmem), "pmem", NULL); + pmem_override = object_property_get_bool(OBJECT(nvdimm), + "pmem-override", NULL); + if (!is_pmem || pmem_override) { + _FDT(fdt_setprop(fdt, child_offset, "ibm,hcall-flush-required", + NULL, 0)); + } + } + return child_offset; } @@ -397,11 +426,21 @@ typedef struct SpaprNVDIMMDeviceFlushState { typedef struct SpaprNVDIMMDevice SpaprNVDIMMDevice; struct SpaprNVDIMMDevice { + /* private */ NVDIMMDevice parent_obj; + bool hcall_flush_required; uint64_t nvdimm_flush_token; QLIST_HEAD(, SpaprNVDIMMDeviceFlushState) pending_nvdimm_flush_states; QLIST_HEAD(, SpaprNVDIMMDeviceFlushState) completed_nvdimm_flush_states; + + /* public */ + + /* + * The 'on' value for this property forced the qemu to enable the hcall + * flush for the nvdimm device even if the backend is a pmem + */ + bool pmem_override; }; static int flush_worker_cb(void *opaque) @@ -448,6 +487,24 @@ static int spapr_nvdimm_flush_post_load(void *opaque, int version_id) SpaprNVDIMMDevice *s_nvdimm = (SpaprNVDIMMDevice *)opaque; SpaprNVDIMMDeviceFlushState *state; ThreadPool *pool = aio_get_thread_pool(qemu_get_aio_context()); + HostMemoryBackend *backend = MEMORY_BACKEND(PC_DIMM(s_nvdimm)->hostmem); + bool is_pmem = object_property_get_bool(OBJECT(backend), "pmem", NULL); + bool pmem_override = object_property_get_bool(OBJECT(s_nvdimm), + "pmem-override", NULL); + bool dest_hcall_flush_required = pmem_override || !is_pmem; + + if (!s_nvdimm->hcall_flush_required && dest_hcall_flush_required) { + error_report("The file backend for the spapr-nvdimm device %s at " + "source is a pmem, use pmem=on and pmem-override=off to " + "continue.", DEVICE(s_nvdimm)->id); + return -EINVAL; + } + if (s_nvdimm->hcall_flush_required && !dest_hcall_flush_required) { + error_report("The guest expects hcall-flush support for the " + "spapr-nvdimm device %s, use pmem_override=on to " + "continue.", DEVICE(s_nvdimm)->id); + return -EINVAL; + } QLIST_FOREACH(state, &s_nvdimm->pending_nvdimm_flush_states, node) { thread_pool_submit_aio(pool, flush_worker_cb, state, @@ -475,6 +532,7 @@ const VMStateDescription vmstate_spapr_nvdimm_states = { .minimum_version_id = 1, .post_load = spapr_nvdimm_flush_post_load, .fields = (VMStateField[]) { + VMSTATE_BOOL(hcall_flush_required, SpaprNVDIMMDevice), VMSTATE_UINT64(nvdimm_flush_token, SpaprNVDIMMDevice), VMSTATE_QLIST_V(completed_nvdimm_flush_states, SpaprNVDIMMDevice, 1, vmstate_spapr_nvdimm_flush_state, @@ -605,7 +663,11 @@ static target_ulong h_scm_flush(PowerPCCPU *cpu, SpaprMachineState *spapr, } dimm = PC_DIMM(drc->dev); + if (!object_dynamic_cast(OBJECT(dimm), TYPE_SPAPR_NVDIMM)) { + return H_PARAMETER; + } if (continue_token == 0) { + bool is_pmem = false, pmem_override = false; backend = MEMORY_BACKEND(dimm->hostmem); fd = memory_region_get_fd(&backend->mr); @@ -613,6 +675,13 @@ static target_ulong h_scm_flush(PowerPCCPU *cpu, SpaprMachineState *spapr, return H_UNSUPPORTED; } + is_pmem = object_property_get_bool(OBJECT(backend), "pmem", NULL); + pmem_override = object_property_get_bool(OBJECT(dimm), + "pmem-override", NULL); + if (is_pmem && !pmem_override) { + return H_UNSUPPORTED; + } + state = spapr_nvdimm_init_new_flush_state(SPAPR_NVDIMM(dimm)); if (!state) { return H_HARDWARE; @@ -786,3 +855,66 @@ static void spapr_scm_register_types(void) } type_init(spapr_scm_register_types) + +static void spapr_nvdimm_realize(NVDIMMDevice *dimm, Error **errp) +{ + SpaprNVDIMMDevice *s_nvdimm = SPAPR_NVDIMM(dimm); + HostMemoryBackend *backend = MEMORY_BACKEND(PC_DIMM(dimm)->hostmem); + bool is_pmem = object_property_get_bool(OBJECT(backend), "pmem", NULL); + bool pmem_override = object_property_get_bool(OBJECT(dimm), "pmem-override", + NULL); + if (!is_pmem || pmem_override) { + s_nvdimm->hcall_flush_required = true; + } + + vmstate_register(NULL, VMSTATE_INSTANCE_ID_ANY, + &vmstate_spapr_nvdimm_states, dimm); +} + +static void spapr_nvdimm_unrealize(NVDIMMDevice *dimm) +{ + vmstate_unregister(NULL, &vmstate_spapr_nvdimm_states, dimm); +} + +static Property spapr_nvdimm_properties[] = { +#ifdef CONFIG_LIBPMEM + DEFINE_PROP_BOOL("pmem-override", SpaprNVDIMMDevice, pmem_override, false), +#endif + DEFINE_PROP_END_OF_LIST(), +}; + +static void spapr_nvdimm_class_init(ObjectClass *oc, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(oc); + NVDIMMClass *nvc = NVDIMM_CLASS(oc); + + nvc->realize = spapr_nvdimm_realize; + nvc->unrealize = spapr_nvdimm_unrealize; + + device_class_set_props(dc, spapr_nvdimm_properties); +} + +static void spapr_nvdimm_init(Object *obj) +{ + SpaprNVDIMMDevice *s_nvdimm = SPAPR_NVDIMM(obj); + + s_nvdimm->hcall_flush_required = false; + QLIST_INIT(&s_nvdimm->pending_nvdimm_flush_states); + QLIST_INIT(&s_nvdimm->completed_nvdimm_flush_states); +} + +static TypeInfo spapr_nvdimm_info = { + .name = TYPE_SPAPR_NVDIMM, + .parent = TYPE_NVDIMM, + .class_init = spapr_nvdimm_class_init, + .class_size = sizeof(SPAPRNVDIMMClass), + .instance_size = sizeof(SpaprNVDIMMDevice), + .instance_init = spapr_nvdimm_init, +}; + +static void spapr_nvdimm_register_types(void) +{ + type_register_static(&spapr_nvdimm_info); +} + +type_init(spapr_nvdimm_register_types) |