From a324d6f166970f8f6a82c61ffd2356fbda81c8f4 Mon Sep 17 00:00:00 2001 From: Bharata B Rao Date: Thu, 19 Apr 2018 12:17:35 +0530 Subject: [PATCH] spapr: Support ibm,dynamic-memory-v2 property The new property ibm,dynamic-memory-v2 allows memory to be represented in a more compact manner in device tree. Signed-off-by: Bharata B Rao Signed-off-by: David Gibson --- docs/specs/ppc-spapr-hotplug.txt | 19 +++ hw/ppc/spapr.c | 232 ++++++++++++++++++++++++------- include/hw/ppc/spapr_ovec.h | 1 + 3 files changed, 203 insertions(+), 49 deletions(-) diff --git a/docs/specs/ppc-spapr-hotplug.txt b/docs/specs/ppc-spapr-hotplug.txt index f57e2a09c6..cc7833108e 100644 --- a/docs/specs/ppc-spapr-hotplug.txt +++ b/docs/specs/ppc-spapr-hotplug.txt @@ -387,4 +387,23 @@ Each LMB list entry consists of the following elements: - A 32bit flags word. The bit at bit position 0x00000008 defines whether the LMB is assigned to the the partition as of boot time. +ibm,dynamic-memory-v2 + +This property describes the dynamically reconfigurable memory. This is +an alternate and newer way to describe dyanamically reconfigurable memory. +It is a property encoded array that has an integer N (the number of +LMB set entries) followed by N LMB set entries. There is an LMB set entry +for each sequential group of LMBs that share common attributes. + +Each LMB set entry consists of the following elements: + +- Number of sequential LMBs in the entry represented by a 32bit integer. +- Logical address of the first LMB in the set encoded as a 64bit integer. +- DRC index of the first LMB in the set. +- Associativity list index that is used as an index into + ibm,associativity-lookup-arrays property described earlier. This + is used to retrieve the right associativity list to be used for all + the LMBs in this set. +- A 32bit flags word that applies to all the LMBs in the set. + [1] http://thread.gmane.org/gmane.linux.ports.ppc.embedded/75350/focus=106867 diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 2203b6f46d..b35aff5d81 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -668,63 +668,137 @@ static uint32_t spapr_pc_dimm_node(MemoryDeviceInfoList *list, ram_addr_t addr) return -1; } -/* - * Adds ibm,dynamic-reconfiguration-memory node. - * Refer to docs/specs/ppc-spapr-hotplug.txt for the documentation - * of this device tree node. - */ -static int spapr_populate_drconf_memory(sPAPRMachineState *spapr, void *fdt) +struct sPAPRDrconfCellV2 { + uint32_t seq_lmbs; + uint64_t base_addr; + uint32_t drc_index; + uint32_t aa_index; + uint32_t flags; +} QEMU_PACKED; + +typedef struct DrconfCellQueue { + struct sPAPRDrconfCellV2 cell; + QSIMPLEQ_ENTRY(DrconfCellQueue) entry; +} DrconfCellQueue; + +static DrconfCellQueue * +spapr_get_drconf_cell(uint32_t seq_lmbs, uint64_t base_addr, + uint32_t drc_index, uint32_t aa_index, + uint32_t flags) { - MachineState *machine = MACHINE(spapr); - int ret, i, offset; + DrconfCellQueue *elem; + + elem = g_malloc0(sizeof(*elem)); + elem->cell.seq_lmbs = cpu_to_be32(seq_lmbs); + elem->cell.base_addr = cpu_to_be64(base_addr); + elem->cell.drc_index = cpu_to_be32(drc_index); + elem->cell.aa_index = cpu_to_be32(aa_index); + elem->cell.flags = cpu_to_be32(flags); + + return elem; +} + +/* ibm,dynamic-memory-v2 */ +static int spapr_populate_drmem_v2(sPAPRMachineState *spapr, void *fdt, + int offset, MemoryDeviceInfoList *dimms) +{ + uint8_t *int_buf, *cur_index, buf_len; + int ret; + uint64_t lmb_size = SPAPR_MEMORY_BLOCK_SIZE; + uint64_t addr, cur_addr, size; + uint32_t nr_boot_lmbs = (spapr->hotplug_memory.base / lmb_size); + uint64_t mem_end = spapr->hotplug_memory.base + + memory_region_size(&spapr->hotplug_memory.mr); + uint32_t node, nr_entries = 0; + sPAPRDRConnector *drc; + DrconfCellQueue *elem, *next; + MemoryDeviceInfoList *info; + QSIMPLEQ_HEAD(, DrconfCellQueue) drconf_queue + = QSIMPLEQ_HEAD_INITIALIZER(drconf_queue); + + /* Entry to cover RAM and the gap area */ + elem = spapr_get_drconf_cell(nr_boot_lmbs, 0, 0, -1, + SPAPR_LMB_FLAGS_RESERVED | + SPAPR_LMB_FLAGS_DRC_INVALID); + QSIMPLEQ_INSERT_TAIL(&drconf_queue, elem, entry); + nr_entries++; + + cur_addr = spapr->hotplug_memory.base; + for (info = dimms; info; info = info->next) { + PCDIMMDeviceInfo *di = info->value->u.dimm.data; + + addr = di->addr; + size = di->size; + node = di->node; + + /* Entry for hot-pluggable area */ + if (cur_addr < addr) { + drc = spapr_drc_by_id(TYPE_SPAPR_DRC_LMB, cur_addr / lmb_size); + g_assert(drc); + elem = spapr_get_drconf_cell((addr - cur_addr) / lmb_size, + cur_addr, spapr_drc_index(drc), -1, 0); + QSIMPLEQ_INSERT_TAIL(&drconf_queue, elem, entry); + nr_entries++; + } + + /* Entry for DIMM */ + drc = spapr_drc_by_id(TYPE_SPAPR_DRC_LMB, addr / lmb_size); + g_assert(drc); + elem = spapr_get_drconf_cell(size / lmb_size, addr, + spapr_drc_index(drc), node, + SPAPR_LMB_FLAGS_ASSIGNED); + QSIMPLEQ_INSERT_TAIL(&drconf_queue, elem, entry); + nr_entries++; + cur_addr = addr + size; + } + + /* Entry for remaining hotpluggable area */ + if (cur_addr < mem_end) { + drc = spapr_drc_by_id(TYPE_SPAPR_DRC_LMB, cur_addr / lmb_size); + g_assert(drc); + elem = spapr_get_drconf_cell((mem_end - cur_addr) / lmb_size, + cur_addr, spapr_drc_index(drc), -1, 0); + QSIMPLEQ_INSERT_TAIL(&drconf_queue, elem, entry); + nr_entries++; + } + + buf_len = nr_entries * sizeof(struct sPAPRDrconfCellV2) + sizeof(uint32_t); + int_buf = cur_index = g_malloc0(buf_len); + *(uint32_t *)int_buf = cpu_to_be32(nr_entries); + cur_index += sizeof(nr_entries); + + QSIMPLEQ_FOREACH_SAFE(elem, &drconf_queue, entry, next) { + memcpy(cur_index, &elem->cell, sizeof(elem->cell)); + cur_index += sizeof(elem->cell); + QSIMPLEQ_REMOVE(&drconf_queue, elem, DrconfCellQueue, entry); + g_free(elem); + } + + ret = fdt_setprop(fdt, offset, "ibm,dynamic-memory-v2", int_buf, buf_len); + g_free(int_buf); + if (ret < 0) { + return -1; + } + return 0; +} + +/* ibm,dynamic-memory */ +static int spapr_populate_drmem_v1(sPAPRMachineState *spapr, void *fdt, + int offset, MemoryDeviceInfoList *dimms) +{ + int i, ret; uint64_t lmb_size = SPAPR_MEMORY_BLOCK_SIZE; - uint32_t prop_lmb_size[] = {0, cpu_to_be32(lmb_size)}; uint32_t hotplug_lmb_start = spapr->hotplug_memory.base / lmb_size; uint32_t nr_lmbs = (spapr->hotplug_memory.base + memory_region_size(&spapr->hotplug_memory.mr)) / lmb_size; uint32_t *int_buf, *cur_index, buf_len; - int nr_nodes = nb_numa_nodes ? nb_numa_nodes : 1; - MemoryDeviceInfoList *dimms = NULL; - - /* - * Don't create the node if there is no hotpluggable memory - */ - if (machine->ram_size == machine->maxram_size) { - return 0; - } /* * Allocate enough buffer size to fit in ibm,dynamic-memory - * or ibm,associativity-lookup-arrays */ - buf_len = MAX(nr_lmbs * SPAPR_DR_LMB_LIST_ENTRY_SIZE + 1, nr_nodes * 4 + 2) - * sizeof(uint32_t); + buf_len = (nr_lmbs * SPAPR_DR_LMB_LIST_ENTRY_SIZE + 1) * sizeof(uint32_t); cur_index = int_buf = g_malloc0(buf_len); - - offset = fdt_add_subnode(fdt, 0, "ibm,dynamic-reconfiguration-memory"); - - ret = fdt_setprop(fdt, offset, "ibm,lmb-size", prop_lmb_size, - sizeof(prop_lmb_size)); - if (ret < 0) { - goto out; - } - - ret = fdt_setprop_cell(fdt, offset, "ibm,memory-flags-mask", 0xff); - if (ret < 0) { - goto out; - } - - ret = fdt_setprop_cell(fdt, offset, "ibm,memory-preservation-time", 0x0); - if (ret < 0) { - goto out; - } - - if (hotplug_lmb_start) { - dimms = qmp_pc_dimm_device_list(); - } - - /* ibm,dynamic-memory */ int_buf[0] = cpu_to_be32(nr_lmbs); cur_index++; for (i = 0; i < nr_lmbs; i++) { @@ -764,13 +838,71 @@ static int spapr_populate_drconf_memory(sPAPRMachineState *spapr, void *fdt) cur_index += SPAPR_DR_LMB_LIST_ENTRY_SIZE; } - qapi_free_MemoryDeviceInfoList(dimms); ret = fdt_setprop(fdt, offset, "ibm,dynamic-memory", int_buf, buf_len); + g_free(int_buf); if (ret < 0) { - goto out; + return -1; + } + return 0; +} + +/* + * Adds ibm,dynamic-reconfiguration-memory node. + * Refer to docs/specs/ppc-spapr-hotplug.txt for the documentation + * of this device tree node. + */ +static int spapr_populate_drconf_memory(sPAPRMachineState *spapr, void *fdt) +{ + MachineState *machine = MACHINE(spapr); + int ret, i, offset; + uint64_t lmb_size = SPAPR_MEMORY_BLOCK_SIZE; + uint32_t prop_lmb_size[] = {0, cpu_to_be32(lmb_size)}; + uint32_t *int_buf, *cur_index, buf_len; + int nr_nodes = nb_numa_nodes ? nb_numa_nodes : 1; + MemoryDeviceInfoList *dimms = NULL; + + /* + * Don't create the node if there is no hotpluggable memory + */ + if (machine->ram_size == machine->maxram_size) { + return 0; + } + + offset = fdt_add_subnode(fdt, 0, "ibm,dynamic-reconfiguration-memory"); + + ret = fdt_setprop(fdt, offset, "ibm,lmb-size", prop_lmb_size, + sizeof(prop_lmb_size)); + if (ret < 0) { + return ret; + } + + ret = fdt_setprop_cell(fdt, offset, "ibm,memory-flags-mask", 0xff); + if (ret < 0) { + return ret; + } + + ret = fdt_setprop_cell(fdt, offset, "ibm,memory-preservation-time", 0x0); + if (ret < 0) { + return ret; + } + + /* ibm,dynamic-memory or ibm,dynamic-memory-v2 */ + dimms = qmp_pc_dimm_device_list(); + if (spapr_ovec_test(spapr->ov5_cas, OV5_DRMEM_V2)) { + ret = spapr_populate_drmem_v2(spapr, fdt, offset, dimms); + } else { + ret = spapr_populate_drmem_v1(spapr, fdt, offset, dimms); + } + qapi_free_MemoryDeviceInfoList(dimms); + + if (ret < 0) { + return ret; } /* ibm,associativity-lookup-arrays */ + buf_len = (nr_nodes * 4 + 2) * sizeof(uint32_t); + cur_index = int_buf = g_malloc0(buf_len); + cur_index = int_buf; int_buf[0] = cpu_to_be32(nr_nodes); int_buf[1] = cpu_to_be32(4); /* Number of entries per associativity list */ @@ -787,8 +919,8 @@ static int spapr_populate_drconf_memory(sPAPRMachineState *spapr, void *fdt) } ret = fdt_setprop(fdt, offset, "ibm,associativity-lookup-arrays", int_buf, (cur_index - int_buf) * sizeof(uint32_t)); -out: g_free(int_buf); + return ret; } @@ -2491,6 +2623,9 @@ static void spapr_machine_init(MachineState *machine) spapr_ovec_set(spapr->ov5, OV5_HPT_RESIZE); } + /* advertise support for ibm,dyamic-memory-v2 */ + spapr_ovec_set(spapr->ov5, OV5_DRMEM_V2); + /* init CPUs */ spapr_init_cpus(spapr); @@ -2918,7 +3053,6 @@ static void spapr_instance_init(Object *obj) " place of standard EPOW events when possible" " (required for memory hot-unplug support)", NULL); - ppc_compat_add_property(obj, "max-cpu-compat", &spapr->max_compat_pvr, "Maximum permitted CPU compatibility mode", &error_fatal); diff --git a/include/hw/ppc/spapr_ovec.h b/include/hw/ppc/spapr_ovec.h index bf25e5d954..0f2d8d715d 100644 --- a/include/hw/ppc/spapr_ovec.h +++ b/include/hw/ppc/spapr_ovec.h @@ -51,6 +51,7 @@ typedef struct sPAPROptionVector sPAPROptionVector; #define OV5_FORM1_AFFINITY OV_BIT(5, 0) #define OV5_HP_EVT OV_BIT(6, 5) #define OV5_HPT_RESIZE OV_BIT(6, 7) +#define OV5_DRMEM_V2 OV_BIT(22, 0) #define OV5_XIVE_BOTH OV_BIT(23, 0) #define OV5_XIVE_EXPLOIT OV_BIT(23, 1) /* 1=exploitation 0=legacy */