hw/ppc/pnv_core.c - qemu - Git at Google

 /*
  * QEMU PowerPC PowerNV CPU Core model
  *
  * Copyright (c) 2016, IBM Corporation.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public License
  * as published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
 #include "qemu/osdep.h"
 #include "sysemu/sysemu.h"
 #include "qapi/error.h"
 #include "qemu/log.h"
 #include "target/ppc/cpu.h"
 #include "hw/ppc/ppc.h"
 #include "hw/ppc/pnv.h"
 #include "hw/ppc/pnv_core.h"
 #include "hw/ppc/pnv_xscom.h"
 #include "hw/ppc/xics.h"

 static const char *pnv_core_cpu_typename(PnvCore *pc)
 {
     const char *core_type = object_class_get_name(object_get_class(OBJECT(pc)));
     int len = strlen(core_type) - strlen(PNV_CORE_TYPE_SUFFIX);
     char *s = g_strdup_printf(POWERPC_CPU_TYPE_NAME("%.*s"), len, core_type);
     const char *cpu_type = object_class_get_name(object_class_by_name(s));
     g_free(s);
     return cpu_type;
 }

 static void pnv_cpu_reset(void *opaque)
 {
     PowerPCCPU *cpu = opaque;
     CPUState *cs = CPU(cpu);
     CPUPPCState *env = &cpu->env;

     cpu_reset(cs);

     /*
      * the skiboot firmware elects a primary thread to initialize the
      * system and it can be any.
      */
     env->gpr[3] = PNV_FDT_ADDR;
     env->nip = 0x10;
     env->msr |= MSR_HVB; /* Hypervisor mode */
 }

 /*
  * These values are read by the PowerNV HW monitors under Linux
  */
 #define PNV_XSCOM_EX_DTS_RESULT0     0x50000
 #define PNV_XSCOM_EX_DTS_RESULT1     0x50001

 static uint64_t pnv_core_xscom_read(void *opaque, hwaddr addr,
                                     unsigned int width)
 {
     uint32_t offset = addr >> 3;
     uint64_t val = 0;

     /* The result should be 38 C */
     switch (offset) {
     case PNV_XSCOM_EX_DTS_RESULT0:
         val = 0x26f024f023f0000ull;
         break;
     case PNV_XSCOM_EX_DTS_RESULT1:
         val = 0x24f000000000000ull;
         break;
     default:
         qemu_log_mask(LOG_UNIMP, "Warning: reading reg=0x%" HWADDR_PRIx "\n",
                   addr);
     }

     return val;
 }

 static void pnv_core_xscom_write(void *opaque, hwaddr addr, uint64_t val,
                                  unsigned int width)
 {
     qemu_log_mask(LOG_UNIMP, "Warning: writing to reg=0x%" HWADDR_PRIx "\n",
                   addr);
 }

 static const MemoryRegionOps pnv_core_xscom_ops = {
     .read = pnv_core_xscom_read,
     .write = pnv_core_xscom_write,
     .valid.min_access_size = 8,
     .valid.max_access_size = 8,
     .impl.min_access_size = 8,
     .impl.max_access_size = 8,
     .endianness = DEVICE_BIG_ENDIAN,
 };

 static void pnv_realize_vcpu(PowerPCCPU *cpu, PnvChip *chip, Error **errp)
 {
     CPUPPCState *env = &cpu->env;
     int core_pir;
     int thread_index = 0; /* TODO: TCG supports only one thread */
     ppc_spr_t *pir = &env->spr_cb[SPR_PIR];
     Error *local_err = NULL;
     PnvChipClass *pcc = PNV_CHIP_GET_CLASS(chip);

     object_property_set_bool(OBJECT(cpu), true, "realized", &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         return;
     }

     cpu->intc = pcc->intc_create(chip, OBJECT(cpu), &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         return;
     }

     core_pir = object_property_get_uint(OBJECT(cpu), "core-pir", &error_abort);

     /*
      * The PIR of a thread is the core PIR + the thread index. We will
      * need to find a way to get the thread index when TCG supports
      * more than 1. We could use the object name ?
      */
     pir->default_value = core_pir + thread_index;

     /* Set time-base frequency to 512 MHz */
     cpu_ppc_tb_init(env, PNV_TIMEBASE_FREQ);

     qemu_register_reset(pnv_cpu_reset, cpu);
 }

 static void pnv_core_realize(DeviceState *dev, Error **errp)
 {
     PnvCore *pc = PNV_CORE(OBJECT(dev));
     CPUCore *cc = CPU_CORE(OBJECT(dev));
     const char *typename = pnv_core_cpu_typename(pc);
     Error *local_err = NULL;
     void *obj;
     int i, j;
     char name[32];
     Object *chip;

     chip = object_property_get_link(OBJECT(dev), "chip", &local_err);
     if (!chip) {
         error_propagate(errp, local_err);
         error_prepend(errp, "required link 'chip' not found: ");
         return;
     }

     pc->threads = g_new(PowerPCCPU *, cc->nr_threads);
     for (i = 0; i < cc->nr_threads; i++) {
         obj = object_new(typename);

         pc->threads[i] = POWERPC_CPU(obj);

         snprintf(name, sizeof(name), "thread[%d]", i);
         object_property_add_child(OBJECT(pc), name, obj, &error_abort);
         object_property_add_alias(obj, "core-pir", OBJECT(pc),
                                   "pir", &error_abort);
         object_unref(obj);
     }

     for (j = 0; j < cc->nr_threads; j++) {
         pnv_realize_vcpu(pc->threads[j], PNV_CHIP(chip), &local_err);
         if (local_err) {
             goto err;
         }
     }

     snprintf(name, sizeof(name), "xscom-core.%d", cc->core_id);
     pnv_xscom_region_init(&pc->xscom_regs, OBJECT(dev), &pnv_core_xscom_ops,
                           pc, name, PNV_XSCOM_EX_SIZE);
     return;

 err:
     while (--i >= 0) {
         obj = OBJECT(pc->threads[i]);
         object_unparent(obj);
     }
     g_free(pc->threads);
     error_propagate(errp, local_err);
 }

 static void pnv_unrealize_vcpu(PowerPCCPU *cpu)
 {
     qemu_unregister_reset(pnv_cpu_reset, cpu);
     object_unparent(cpu->intc);
     cpu_remove_sync(CPU(cpu));
     object_unparent(OBJECT(cpu));
 }

 static void pnv_core_unrealize(DeviceState *dev, Error **errp)
 {
     PnvCore *pc = PNV_CORE(dev);
     CPUCore *cc = CPU_CORE(dev);
     int i;

     for (i = 0; i < cc->nr_threads; i++) {
         pnv_unrealize_vcpu(pc->threads[i]);
     }
     g_free(pc->threads);
 }

 static Property pnv_core_properties[] = {
     DEFINE_PROP_UINT32("pir", PnvCore, pir, 0),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void pnv_core_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);

     dc->realize = pnv_core_realize;
     dc->unrealize = pnv_core_unrealize;
     dc->props = pnv_core_properties;
 }

 #define DEFINE_PNV_CORE_TYPE(cpu_model)         \
     {                                           \
         .parent = TYPE_PNV_CORE,                \
         .name = PNV_CORE_TYPE_NAME(cpu_model),  \
     }

 static const TypeInfo pnv_core_infos[] = {
     {
         .name           = TYPE_PNV_CORE,
         .parent         = TYPE_CPU_CORE,
         .instance_size  = sizeof(PnvCore),
         .class_size     = sizeof(PnvCoreClass),
         .class_init = pnv_core_class_init,
         .abstract       = true,
     },
     DEFINE_PNV_CORE_TYPE("power8e_v2.1"),
     DEFINE_PNV_CORE_TYPE("power8_v2.0"),
     DEFINE_PNV_CORE_TYPE("power8nvl_v1.0"),
     DEFINE_PNV_CORE_TYPE("power9_v2.0"),
 };

 DEFINE_TYPES(pnv_core_infos)
	/*
	* QEMU PowerPC PowerNV CPU Core model
	*
	* Copyright (c) 2016, IBM Corporation.
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public License
	* as published by the Free Software Foundation; either version 2 of
	* the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	*/
	#include "qemu/osdep.h"
	#include "sysemu/sysemu.h"
	#include "qapi/error.h"
	#include "qemu/log.h"
	#include "target/ppc/cpu.h"
	#include "hw/ppc/ppc.h"
	#include "hw/ppc/pnv.h"
	#include "hw/ppc/pnv_core.h"
	#include "hw/ppc/pnv_xscom.h"
	#include "hw/ppc/xics.h"

	static const char pnv_core_cpu_typename(PnvCore pc)
	{
	const char *core_type = object_class_get_name(object_get_class(OBJECT(pc)));
	int len = strlen(core_type) - strlen(PNV_CORE_TYPE_SUFFIX);
	char s = g_strdup_printf(POWERPC_CPU_TYPE_NAME("%.s"), len, core_type);
	const char *cpu_type = object_class_get_name(object_class_by_name(s));
	g_free(s);
	return cpu_type;
	}

	static void pnv_cpu_reset(void *opaque)
	{
	PowerPCCPU *cpu = opaque;
	CPUState *cs = CPU(cpu);
	CPUPPCState *env = &cpu->env;

	cpu_reset(cs);

	/*
	* the skiboot firmware elects a primary thread to initialize the
	* system and it can be any.
	*/
	env->gpr[3] = PNV_FDT_ADDR;
	env->nip = 0x10;
	env->msr \|= MSR_HVB; /* Hypervisor mode */
	}

	/*
	* These values are read by the PowerNV HW monitors under Linux
	*/
	#define PNV_XSCOM_EX_DTS_RESULT0 0x50000
	#define PNV_XSCOM_EX_DTS_RESULT1 0x50001

	static uint64_t pnv_core_xscom_read(void *opaque, hwaddr addr,
	unsigned int width)
	{
	uint32_t offset = addr >> 3;
	uint64_t val = 0;

	/* The result should be 38 C */
	switch (offset) {
	case PNV_XSCOM_EX_DTS_RESULT0:
	val = 0x26f024f023f0000ull;
	break;
	case PNV_XSCOM_EX_DTS_RESULT1:
	val = 0x24f000000000000ull;
	break;
	default:
	qemu_log_mask(LOG_UNIMP, "Warning: reading reg=0x%" HWADDR_PRIx "\n",
	addr);
	}

	return val;
	}

	static void pnv_core_xscom_write(void *opaque, hwaddr addr, uint64_t val,
	unsigned int width)
	{
	qemu_log_mask(LOG_UNIMP, "Warning: writing to reg=0x%" HWADDR_PRIx "\n",
	addr);
	}

	static const MemoryRegionOps pnv_core_xscom_ops = {
	.read = pnv_core_xscom_read,
	.write = pnv_core_xscom_write,
	.valid.min_access_size = 8,
	.valid.max_access_size = 8,
	.impl.min_access_size = 8,
	.impl.max_access_size = 8,
	.endianness = DEVICE_BIG_ENDIAN,
	};

	static void pnv_realize_vcpu(PowerPCCPU cpu, PnvChip chip, Error **errp)
	{
	CPUPPCState *env = &cpu->env;
	int core_pir;
	int thread_index = 0; /* TODO: TCG supports only one thread */
	ppc_spr_t *pir = &env->spr_cb[SPR_PIR];
	Error *local_err = NULL;
	PnvChipClass *pcc = PNV_CHIP_GET_CLASS(chip);

	object_property_set_bool(OBJECT(cpu), true, "realized", &local_err);
	if (local_err) {
	error_propagate(errp, local_err);
	return;
	}

	cpu->intc = pcc->intc_create(chip, OBJECT(cpu), &local_err);
	if (local_err) {
	error_propagate(errp, local_err);
	return;
	}

	core_pir = object_property_get_uint(OBJECT(cpu), "core-pir", &error_abort);

	/*
	* The PIR of a thread is the core PIR + the thread index. We will
	* need to find a way to get the thread index when TCG supports
	* more than 1. We could use the object name ?
	*/
	pir->default_value = core_pir + thread_index;

	/* Set time-base frequency to 512 MHz */
	cpu_ppc_tb_init(env, PNV_TIMEBASE_FREQ);

	qemu_register_reset(pnv_cpu_reset, cpu);
	}

	static void pnv_core_realize(DeviceState dev, Error *errp)
	{
	PnvCore *pc = PNV_CORE(OBJECT(dev));
	CPUCore *cc = CPU_CORE(OBJECT(dev));
	const char *typename = pnv_core_cpu_typename(pc);
	Error *local_err = NULL;
	void *obj;
	int i, j;
	char name[32];
	Object *chip;

	chip = object_property_get_link(OBJECT(dev), "chip", &local_err);
	if (!chip) {
	error_propagate(errp, local_err);
	error_prepend(errp, "required link 'chip' not found: ");
	return;
	}

	pc->threads = g_new(PowerPCCPU *, cc->nr_threads);
	for (i = 0; i < cc->nr_threads; i++) {
	obj = object_new(typename);

	pc->threads[i] = POWERPC_CPU(obj);

	snprintf(name, sizeof(name), "thread[%d]", i);
	object_property_add_child(OBJECT(pc), name, obj, &error_abort);
	object_property_add_alias(obj, "core-pir", OBJECT(pc),
	"pir", &error_abort);
	object_unref(obj);
	}

	for (j = 0; j < cc->nr_threads; j++) {
	pnv_realize_vcpu(pc->threads[j], PNV_CHIP(chip), &local_err);
	if (local_err) {
	goto err;
	}
	}

	snprintf(name, sizeof(name), "xscom-core.%d", cc->core_id);
	pnv_xscom_region_init(&pc->xscom_regs, OBJECT(dev), &pnv_core_xscom_ops,
	pc, name, PNV_XSCOM_EX_SIZE);
	return;

	err:
	while (--i >= 0) {
	obj = OBJECT(pc->threads[i]);
	object_unparent(obj);
	}
	g_free(pc->threads);
	error_propagate(errp, local_err);
	}

	static void pnv_unrealize_vcpu(PowerPCCPU *cpu)
	{
	qemu_unregister_reset(pnv_cpu_reset, cpu);
	object_unparent(cpu->intc);
	cpu_remove_sync(CPU(cpu));
	object_unparent(OBJECT(cpu));
	}

	static void pnv_core_unrealize(DeviceState dev, Error *errp)
	{
	PnvCore *pc = PNV_CORE(dev);
	CPUCore *cc = CPU_CORE(dev);
	int i;

	for (i = 0; i < cc->nr_threads; i++) {
	pnv_unrealize_vcpu(pc->threads[i]);
	}
	g_free(pc->threads);
	}

	static Property pnv_core_properties[] = {
	DEFINE_PROP_UINT32("pir", PnvCore, pir, 0),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void pnv_core_class_init(ObjectClass oc, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(oc);

	dc->realize = pnv_core_realize;
	dc->unrealize = pnv_core_unrealize;
	dc->props = pnv_core_properties;
	}

	#define DEFINE_PNV_CORE_TYPE(cpu_model) \
	{ \
	.parent = TYPE_PNV_CORE, \
	.name = PNV_CORE_TYPE_NAME(cpu_model), \
	}

	static const TypeInfo pnv_core_infos[] = {
	{
	.name = TYPE_PNV_CORE,
	.parent = TYPE_CPU_CORE,
	.instance_size = sizeof(PnvCore),
	.class_size = sizeof(PnvCoreClass),
	.class_init = pnv_core_class_init,
	.abstract = true,
	},
	DEFINE_PNV_CORE_TYPE("power8e_v2.1"),
	DEFINE_PNV_CORE_TYPE("power8_v2.0"),
	DEFINE_PNV_CORE_TYPE("power8nvl_v1.0"),
	DEFINE_PNV_CORE_TYPE("power9_v2.0"),
	};

	DEFINE_TYPES(pnv_core_infos)