619 lines
20 KiB
C
619 lines
20 KiB
C
/*
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* SCLP Support
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*
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* Copyright IBM, Corp. 2012
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*
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* Authors:
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* Christian Borntraeger <borntraeger@de.ibm.com>
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* Heinz Graalfs <graalfs@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at your
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* option) any later version. See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "cpu.h"
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#include "sysemu/kvm.h"
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#include "exec/memory.h"
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#include "sysemu/sysemu.h"
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#include "exec/address-spaces.h"
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#include "hw/boards.h"
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#include "hw/s390x/sclp.h"
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#include "hw/s390x/event-facility.h"
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#include "hw/s390x/s390-pci-bus.h"
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static inline SCLPDevice *get_sclp_device(void)
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{
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return SCLP(object_resolve_path_type("", TYPE_SCLP, NULL));
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}
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/* Provide information about the configuration, CPUs and storage */
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static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb)
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{
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ReadInfo *read_info = (ReadInfo *) sccb;
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MachineState *machine = MACHINE(qdev_get_machine());
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sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
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CPUState *cpu;
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int cpu_count = 0;
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int i = 0;
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int rnsize, rnmax;
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int slots = MIN(machine->ram_slots, s390_get_memslot_count(kvm_state));
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CPU_FOREACH(cpu) {
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cpu_count++;
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}
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/* CPU information */
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read_info->entries_cpu = cpu_to_be16(cpu_count);
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read_info->offset_cpu = cpu_to_be16(offsetof(ReadInfo, entries));
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read_info->highest_cpu = cpu_to_be16(max_cpus);
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for (i = 0; i < cpu_count; i++) {
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read_info->entries[i].address = i;
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read_info->entries[i].type = 0;
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}
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read_info->facilities = cpu_to_be64(SCLP_HAS_CPU_INFO |
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SCLP_HAS_PCI_RECONFIG);
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/* Memory Hotplug is only supported for the ccw machine type */
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if (mhd) {
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mhd->standby_subregion_size = MEM_SECTION_SIZE;
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/* Deduct the memory slot already used for core */
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if (slots > 0) {
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while ((mhd->standby_subregion_size * (slots - 1)
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< mhd->standby_mem_size)) {
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mhd->standby_subregion_size = mhd->standby_subregion_size << 1;
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}
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}
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/*
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* Initialize mapping of guest standby memory sections indicating which
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* are and are not online. Assume all standby memory begins offline.
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*/
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if (mhd->standby_state_map == 0) {
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if (mhd->standby_mem_size % mhd->standby_subregion_size) {
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mhd->standby_state_map = g_malloc0((mhd->standby_mem_size /
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mhd->standby_subregion_size + 1) *
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(mhd->standby_subregion_size /
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MEM_SECTION_SIZE));
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} else {
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mhd->standby_state_map = g_malloc0(mhd->standby_mem_size /
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MEM_SECTION_SIZE);
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}
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}
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mhd->padded_ram_size = ram_size + mhd->pad_size;
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mhd->rzm = 1 << mhd->increment_size;
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read_info->facilities |= cpu_to_be64(SCLP_FC_ASSIGN_ATTACH_READ_STOR);
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}
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rnsize = 1 << (sclp->increment_size - 20);
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if (rnsize <= 128) {
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read_info->rnsize = rnsize;
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} else {
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read_info->rnsize = 0;
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read_info->rnsize2 = cpu_to_be32(rnsize);
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}
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rnmax = machine->maxram_size >> sclp->increment_size;
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if (rnmax < 0x10000) {
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read_info->rnmax = cpu_to_be16(rnmax);
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} else {
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read_info->rnmax = cpu_to_be16(0);
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read_info->rnmax2 = cpu_to_be64(rnmax);
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}
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sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
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}
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static void read_storage_element0_info(SCLPDevice *sclp, SCCB *sccb)
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{
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int i, assigned;
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int subincrement_id = SCLP_STARTING_SUBINCREMENT_ID;
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ReadStorageElementInfo *storage_info = (ReadStorageElementInfo *) sccb;
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sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
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if (!mhd) {
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sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
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return;
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}
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if ((ram_size >> mhd->increment_size) >= 0x10000) {
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sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION);
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return;
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}
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/* Return information regarding core memory */
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storage_info->max_id = cpu_to_be16(mhd->standby_mem_size ? 1 : 0);
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assigned = ram_size >> mhd->increment_size;
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storage_info->assigned = cpu_to_be16(assigned);
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for (i = 0; i < assigned; i++) {
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storage_info->entries[i] = cpu_to_be32(subincrement_id);
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subincrement_id += SCLP_INCREMENT_UNIT;
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}
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sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
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}
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static void read_storage_element1_info(SCLPDevice *sclp, SCCB *sccb)
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{
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ReadStorageElementInfo *storage_info = (ReadStorageElementInfo *) sccb;
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sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
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if (!mhd) {
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sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
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return;
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}
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if ((mhd->standby_mem_size >> mhd->increment_size) >= 0x10000) {
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sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION);
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return;
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}
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/* Return information regarding standby memory */
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storage_info->max_id = cpu_to_be16(mhd->standby_mem_size ? 1 : 0);
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storage_info->assigned = cpu_to_be16(mhd->standby_mem_size >>
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mhd->increment_size);
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storage_info->standby = cpu_to_be16(mhd->standby_mem_size >>
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mhd->increment_size);
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sccb->h.response_code = cpu_to_be16(SCLP_RC_STANDBY_READ_COMPLETION);
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}
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static void attach_storage_element(SCLPDevice *sclp, SCCB *sccb,
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uint16_t element)
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{
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int i, assigned, subincrement_id;
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AttachStorageElement *attach_info = (AttachStorageElement *) sccb;
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sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
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if (!mhd) {
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sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
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return;
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}
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if (element != 1) {
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sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
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return;
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}
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assigned = mhd->standby_mem_size >> mhd->increment_size;
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attach_info->assigned = cpu_to_be16(assigned);
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subincrement_id = ((ram_size >> mhd->increment_size) << 16)
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+ SCLP_STARTING_SUBINCREMENT_ID;
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for (i = 0; i < assigned; i++) {
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attach_info->entries[i] = cpu_to_be32(subincrement_id);
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subincrement_id += SCLP_INCREMENT_UNIT;
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}
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sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION);
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}
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static void assign_storage(SCLPDevice *sclp, SCCB *sccb)
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{
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MemoryRegion *mr = NULL;
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uint64_t this_subregion_size;
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AssignStorage *assign_info = (AssignStorage *) sccb;
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sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
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ram_addr_t assign_addr;
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MemoryRegion *sysmem = get_system_memory();
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if (!mhd) {
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sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
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return;
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}
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assign_addr = (assign_info->rn - 1) * mhd->rzm;
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if ((assign_addr % MEM_SECTION_SIZE == 0) &&
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(assign_addr >= mhd->padded_ram_size)) {
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/* Re-use existing memory region if found */
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mr = memory_region_find(sysmem, assign_addr, 1).mr;
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memory_region_unref(mr);
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if (!mr) {
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MemoryRegion *standby_ram = g_new(MemoryRegion, 1);
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/* offset to align to standby_subregion_size for allocation */
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ram_addr_t offset = assign_addr -
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(assign_addr - mhd->padded_ram_size)
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% mhd->standby_subregion_size;
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/* strlen("standby.ram") + 4 (Max of KVM_MEMORY_SLOTS) + NULL */
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char id[16];
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snprintf(id, 16, "standby.ram%d",
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(int)((offset - mhd->padded_ram_size) /
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mhd->standby_subregion_size) + 1);
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/* Allocate a subregion of the calculated standby_subregion_size */
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if (offset + mhd->standby_subregion_size >
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mhd->padded_ram_size + mhd->standby_mem_size) {
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this_subregion_size = mhd->padded_ram_size +
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mhd->standby_mem_size - offset;
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} else {
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this_subregion_size = mhd->standby_subregion_size;
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}
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memory_region_init_ram(standby_ram, NULL, id, this_subregion_size,
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&error_fatal);
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/* This is a hack to make memory hotunplug work again. Once we have
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* subdevices, we have to unparent them when unassigning memory,
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* instead of doing it via the ref count of the MemoryRegion. */
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object_ref(OBJECT(standby_ram));
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object_unparent(OBJECT(standby_ram));
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vmstate_register_ram_global(standby_ram);
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memory_region_add_subregion(sysmem, offset, standby_ram);
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}
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/* The specified subregion is no longer in standby */
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mhd->standby_state_map[(assign_addr - mhd->padded_ram_size)
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/ MEM_SECTION_SIZE] = 1;
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}
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sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION);
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}
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static void unassign_storage(SCLPDevice *sclp, SCCB *sccb)
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{
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MemoryRegion *mr = NULL;
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AssignStorage *assign_info = (AssignStorage *) sccb;
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sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev();
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ram_addr_t unassign_addr;
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MemoryRegion *sysmem = get_system_memory();
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if (!mhd) {
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sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
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return;
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}
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unassign_addr = (assign_info->rn - 1) * mhd->rzm;
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/* if the addr is a multiple of 256 MB */
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if ((unassign_addr % MEM_SECTION_SIZE == 0) &&
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(unassign_addr >= mhd->padded_ram_size)) {
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mhd->standby_state_map[(unassign_addr -
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mhd->padded_ram_size) / MEM_SECTION_SIZE] = 0;
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/* find the specified memory region and destroy it */
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mr = memory_region_find(sysmem, unassign_addr, 1).mr;
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memory_region_unref(mr);
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if (mr) {
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int i;
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int is_removable = 1;
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ram_addr_t map_offset = (unassign_addr - mhd->padded_ram_size -
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(unassign_addr - mhd->padded_ram_size)
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% mhd->standby_subregion_size);
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/* Mark all affected subregions as 'standby' once again */
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for (i = 0;
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i < (mhd->standby_subregion_size / MEM_SECTION_SIZE);
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i++) {
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if (mhd->standby_state_map[i + map_offset / MEM_SECTION_SIZE]) {
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is_removable = 0;
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break;
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}
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}
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if (is_removable) {
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memory_region_del_subregion(sysmem, mr);
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object_unref(OBJECT(mr));
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}
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}
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}
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sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION);
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}
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/* Provide information about the CPU */
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static void sclp_read_cpu_info(SCLPDevice *sclp, SCCB *sccb)
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{
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ReadCpuInfo *cpu_info = (ReadCpuInfo *) sccb;
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CPUState *cpu;
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int cpu_count = 0;
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int i = 0;
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CPU_FOREACH(cpu) {
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cpu_count++;
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}
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cpu_info->nr_configured = cpu_to_be16(cpu_count);
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cpu_info->offset_configured = cpu_to_be16(offsetof(ReadCpuInfo, entries));
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cpu_info->nr_standby = cpu_to_be16(0);
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/* The standby offset is 16-byte for each CPU */
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cpu_info->offset_standby = cpu_to_be16(cpu_info->offset_configured
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+ cpu_info->nr_configured*sizeof(CPUEntry));
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for (i = 0; i < cpu_count; i++) {
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cpu_info->entries[i].address = i;
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cpu_info->entries[i].type = 0;
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}
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sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
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}
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static void sclp_execute(SCLPDevice *sclp, SCCB *sccb, uint32_t code)
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{
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SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
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SCLPEventFacility *ef = sclp->event_facility;
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SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
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switch (code & SCLP_CMD_CODE_MASK) {
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case SCLP_CMDW_READ_SCP_INFO:
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case SCLP_CMDW_READ_SCP_INFO_FORCED:
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sclp_c->read_SCP_info(sclp, sccb);
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break;
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case SCLP_CMDW_READ_CPU_INFO:
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sclp_c->read_cpu_info(sclp, sccb);
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break;
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case SCLP_READ_STORAGE_ELEMENT_INFO:
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if (code & 0xff00) {
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sclp_c->read_storage_element1_info(sclp, sccb);
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} else {
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sclp_c->read_storage_element0_info(sclp, sccb);
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}
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break;
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case SCLP_ATTACH_STORAGE_ELEMENT:
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sclp_c->attach_storage_element(sclp, sccb, (code & 0xff00) >> 8);
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break;
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case SCLP_ASSIGN_STORAGE:
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sclp_c->assign_storage(sclp, sccb);
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break;
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case SCLP_UNASSIGN_STORAGE:
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sclp_c->unassign_storage(sclp, sccb);
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break;
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case SCLP_CMDW_CONFIGURE_PCI:
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s390_pci_sclp_configure(sccb);
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break;
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case SCLP_CMDW_DECONFIGURE_PCI:
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s390_pci_sclp_deconfigure(sccb);
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break;
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default:
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efc->command_handler(ef, sccb, code);
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break;
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}
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}
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int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code)
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{
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SCLPDevice *sclp = get_sclp_device();
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SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
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int r = 0;
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SCCB work_sccb;
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hwaddr sccb_len = sizeof(SCCB);
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/* first some basic checks on program checks */
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if (env->psw.mask & PSW_MASK_PSTATE) {
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r = -PGM_PRIVILEGED;
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goto out;
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}
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if (cpu_physical_memory_is_io(sccb)) {
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r = -PGM_ADDRESSING;
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goto out;
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}
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if ((sccb & ~0x1fffUL) == 0 || (sccb & ~0x1fffUL) == env->psa
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|| (sccb & ~0x7ffffff8UL) != 0) {
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r = -PGM_SPECIFICATION;
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goto out;
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}
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/*
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* we want to work on a private copy of the sccb, to prevent guests
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* from playing dirty tricks by modifying the memory content after
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* the host has checked the values
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*/
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cpu_physical_memory_read(sccb, &work_sccb, sccb_len);
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/* Valid sccb sizes */
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if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader) ||
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be16_to_cpu(work_sccb.h.length) > SCCB_SIZE) {
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r = -PGM_SPECIFICATION;
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goto out;
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}
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sclp_c->execute(sclp, (SCCB *)&work_sccb, code);
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cpu_physical_memory_write(sccb, &work_sccb,
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be16_to_cpu(work_sccb.h.length));
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sclp_c->service_interrupt(sclp, sccb);
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out:
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return r;
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}
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static void service_interrupt(SCLPDevice *sclp, uint32_t sccb)
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{
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SCLPEventFacility *ef = sclp->event_facility;
|
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SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
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uint32_t param = sccb & ~3;
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/* Indicate whether an event is still pending */
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param |= efc->event_pending(ef) ? 1 : 0;
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|
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if (!param) {
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/* No need to send an interrupt, there's nothing to be notified about */
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return;
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}
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s390_sclp_extint(param);
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}
|
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|
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void sclp_service_interrupt(uint32_t sccb)
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{
|
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SCLPDevice *sclp = get_sclp_device();
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SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
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|
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sclp_c->service_interrupt(sclp, sccb);
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}
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|
|
/* qemu object creation and initialization functions */
|
|
|
|
void s390_sclp_init(void)
|
|
{
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|
Object *new = object_new(TYPE_SCLP);
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|
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object_property_add_child(qdev_get_machine(), TYPE_SCLP, new,
|
|
NULL);
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object_unref(OBJECT(new));
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qdev_init_nofail(DEVICE(new));
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|
}
|
|
|
|
static void sclp_realize(DeviceState *dev, Error **errp)
|
|
{
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|
MachineState *machine = MACHINE(qdev_get_machine());
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|
SCLPDevice *sclp = SCLP(dev);
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|
Error *err = NULL;
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|
uint64_t hw_limit;
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|
int ret;
|
|
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|
object_property_set_bool(OBJECT(sclp->event_facility), true, "realized",
|
|
&err);
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|
if (err) {
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|
goto out;
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|
}
|
|
/*
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|
* qdev_device_add searches the sysbus for TYPE_SCLP_EVENTS_BUS. As long
|
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* as we can't find a fitting bus via the qom tree, we have to add the
|
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* event facility to the sysbus, so e.g. a sclp console can be created.
|
|
*/
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qdev_set_parent_bus(DEVICE(sclp->event_facility), sysbus_get_default());
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|
|
|
ret = s390_set_memory_limit(machine->maxram_size, &hw_limit);
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|
if (ret == -E2BIG) {
|
|
error_setg(&err, "qemu: host supports a maximum of %" PRIu64 " GB",
|
|
hw_limit >> 30);
|
|
} else if (ret) {
|
|
error_setg(&err, "qemu: setting the guest size failed");
|
|
}
|
|
|
|
out:
|
|
error_propagate(errp, err);
|
|
}
|
|
|
|
static void sclp_memory_init(SCLPDevice *sclp)
|
|
{
|
|
MachineState *machine = MACHINE(qdev_get_machine());
|
|
ram_addr_t initial_mem = machine->ram_size;
|
|
ram_addr_t max_mem = machine->maxram_size;
|
|
ram_addr_t standby_mem = max_mem - initial_mem;
|
|
ram_addr_t pad_mem = 0;
|
|
int increment_size = 20;
|
|
|
|
/* The storage increment size is a multiple of 1M and is a power of 2.
|
|
* The number of storage increments must be MAX_STORAGE_INCREMENTS or fewer.
|
|
* The variable 'increment_size' is an exponent of 2 that can be
|
|
* used to calculate the size (in bytes) of an increment. */
|
|
while ((initial_mem >> increment_size) > MAX_STORAGE_INCREMENTS) {
|
|
increment_size++;
|
|
}
|
|
if (machine->ram_slots) {
|
|
while ((standby_mem >> increment_size) > MAX_STORAGE_INCREMENTS) {
|
|
increment_size++;
|
|
}
|
|
}
|
|
sclp->increment_size = increment_size;
|
|
|
|
/* The core and standby memory areas need to be aligned with
|
|
* the increment size. In effect, this can cause the
|
|
* user-specified memory size to be rounded down to align
|
|
* with the nearest increment boundary. */
|
|
initial_mem = initial_mem >> increment_size << increment_size;
|
|
standby_mem = standby_mem >> increment_size << increment_size;
|
|
|
|
/* If the size of ram is not on a MEM_SECTION_SIZE boundary,
|
|
calculate the pad size necessary to force this boundary. */
|
|
if (machine->ram_slots && standby_mem) {
|
|
sclpMemoryHotplugDev *mhd = init_sclp_memory_hotplug_dev();
|
|
|
|
if (initial_mem % MEM_SECTION_SIZE) {
|
|
pad_mem = MEM_SECTION_SIZE - initial_mem % MEM_SECTION_SIZE;
|
|
}
|
|
mhd->increment_size = increment_size;
|
|
mhd->pad_size = pad_mem;
|
|
mhd->standby_mem_size = standby_mem;
|
|
}
|
|
machine->ram_size = initial_mem;
|
|
machine->maxram_size = initial_mem + pad_mem + standby_mem;
|
|
/* let's propagate the changed ram size into the global variable. */
|
|
ram_size = initial_mem;
|
|
}
|
|
|
|
static void sclp_init(Object *obj)
|
|
{
|
|
SCLPDevice *sclp = SCLP(obj);
|
|
Object *new;
|
|
|
|
new = object_new(TYPE_SCLP_EVENT_FACILITY);
|
|
object_property_add_child(obj, TYPE_SCLP_EVENT_FACILITY, new, NULL);
|
|
object_unref(new);
|
|
sclp->event_facility = EVENT_FACILITY(new);
|
|
|
|
sclp_memory_init(sclp);
|
|
}
|
|
|
|
static void sclp_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
SCLPDeviceClass *sc = SCLP_CLASS(oc);
|
|
DeviceClass *dc = DEVICE_CLASS(oc);
|
|
|
|
dc->desc = "SCLP (Service-Call Logical Processor)";
|
|
dc->realize = sclp_realize;
|
|
dc->hotpluggable = false;
|
|
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
|
|
|
|
sc->read_SCP_info = read_SCP_info;
|
|
sc->read_storage_element0_info = read_storage_element0_info;
|
|
sc->read_storage_element1_info = read_storage_element1_info;
|
|
sc->attach_storage_element = attach_storage_element;
|
|
sc->assign_storage = assign_storage;
|
|
sc->unassign_storage = unassign_storage;
|
|
sc->read_cpu_info = sclp_read_cpu_info;
|
|
sc->execute = sclp_execute;
|
|
sc->service_interrupt = service_interrupt;
|
|
}
|
|
|
|
static TypeInfo sclp_info = {
|
|
.name = TYPE_SCLP,
|
|
.parent = TYPE_DEVICE,
|
|
.instance_init = sclp_init,
|
|
.instance_size = sizeof(SCLPDevice),
|
|
.class_init = sclp_class_init,
|
|
.class_size = sizeof(SCLPDeviceClass),
|
|
};
|
|
|
|
sclpMemoryHotplugDev *init_sclp_memory_hotplug_dev(void)
|
|
{
|
|
DeviceState *dev;
|
|
dev = qdev_create(NULL, TYPE_SCLP_MEMORY_HOTPLUG_DEV);
|
|
object_property_add_child(qdev_get_machine(),
|
|
TYPE_SCLP_MEMORY_HOTPLUG_DEV,
|
|
OBJECT(dev), NULL);
|
|
qdev_init_nofail(dev);
|
|
return SCLP_MEMORY_HOTPLUG_DEV(object_resolve_path(
|
|
TYPE_SCLP_MEMORY_HOTPLUG_DEV, NULL));
|
|
}
|
|
|
|
sclpMemoryHotplugDev *get_sclp_memory_hotplug_dev(void)
|
|
{
|
|
return SCLP_MEMORY_HOTPLUG_DEV(object_resolve_path(
|
|
TYPE_SCLP_MEMORY_HOTPLUG_DEV, NULL));
|
|
}
|
|
|
|
static void sclp_memory_hotplug_dev_class_init(ObjectClass *klass,
|
|
void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
|
|
}
|
|
|
|
static TypeInfo sclp_memory_hotplug_dev_info = {
|
|
.name = TYPE_SCLP_MEMORY_HOTPLUG_DEV,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(sclpMemoryHotplugDev),
|
|
.class_init = sclp_memory_hotplug_dev_class_init,
|
|
};
|
|
|
|
static void register_types(void)
|
|
{
|
|
type_register_static(&sclp_memory_hotplug_dev_info);
|
|
type_register_static(&sclp_info);
|
|
}
|
|
type_init(register_types);
|