From patchwork Wed Jul 3 02:12:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibo Mao X-Patchwork-Id: 13720565 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 10340C30658 for ; Wed, 3 Jul 2024 02:14:09 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sOpUd-0005ew-GV; Tue, 02 Jul 2024 22:13:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sOpUc-0005ea-1X for qemu-devel@nongnu.org; Tue, 02 Jul 2024 22:13:10 -0400 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sOpUM-0001lu-06 for qemu-devel@nongnu.org; Tue, 02 Jul 2024 22:13:09 -0400 Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8CxvfCes4Rm1VwAAA--.1377S3; Wed, 03 Jul 2024 10:12:46 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by localhost.localdomain (Coremail) with SMTP id AQAAf8CxJMWds4RmPSQ5AA--.57057S3; Wed, 03 Jul 2024 10:12:45 +0800 (CST) From: Bibo Mao To: Paolo Bonzini , Jiaxun Yang , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , Song Gao Cc: qemu-devel@nongnu.org Subject: [PATCH 1/3] hw/intc/loongson_ipi_common: Add loongson ipi common class Date: Wed, 3 Jul 2024 10:12:43 +0800 Message-Id: <20240703021245.3752786-2-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20240703021245.3752786-1-maobibo@loongson.cn> References: <20240703021245.3752786-1-maobibo@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8CxJMWds4RmPSQ5AA--.57057S3 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Received-SPF: pass client-ip=114.242.206.163; envelope-from=maobibo@loongson.cn; helo=mail.loongson.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Loongson ipi common class and instance is created here, it comes from file loongson_ipi mostly. For the new added loongson ipi common class, there is four interfaces defined here: 1. Interfaces pre_save/post_load are used for future kvm child class 2. Interface get_iocsr_as can be used for different architectures, now MIPS 3A4000 and LoongArch 3A5000 machine use this ip, can inherit this common class. 3. Interace cpu_by_arch_id is added, by default generic function cpu_by_arch_id() is used to search vcpu from physical cpuid, it is generic searching method. Different machine may define another search method such binary searching method. Signed-off-by: Bibo Mao --- hw/intc/loongson_ipi_common.c | 394 ++++++++++++++++++++++++++ include/hw/intc/loongson_ipi_common.h | 71 +++++ 2 files changed, 465 insertions(+) create mode 100644 hw/intc/loongson_ipi_common.c create mode 100644 include/hw/intc/loongson_ipi_common.h diff --git a/hw/intc/loongson_ipi_common.c b/hw/intc/loongson_ipi_common.c new file mode 100644 index 0000000000..f462f24f32 --- /dev/null +++ b/hw/intc/loongson_ipi_common.c @@ -0,0 +1,394 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Loongson ipi interrupt support + * + * Copyright (C) 2021 Loongson Technology Corporation Limited + */ + +#include "qemu/osdep.h" +#include "hw/boards.h" +#include "hw/sysbus.h" +#include "hw/intc/loongson_ipi_common.h" +#include "hw/irq.h" +#include "hw/qdev-properties.h" +#include "qapi/error.h" +#include "qemu/log.h" +#include "exec/address-spaces.h" +#include "exec/memory.h" +#include "migration/vmstate.h" +#include "trace.h" + +static MemTxResult loongson_ipi_core_readl(void *opaque, hwaddr addr, + uint64_t *data, + unsigned size, MemTxAttrs attrs) +{ + IPICore *s = opaque; + uint64_t ret = 0; + int index = 0; + + addr &= 0xff; + switch (addr) { + case CORE_STATUS_OFF: + ret = s->status; + break; + case CORE_EN_OFF: + ret = s->en; + break; + case CORE_SET_OFF: + ret = 0; + break; + case CORE_CLEAR_OFF: + ret = 0; + break; + case CORE_BUF_20 ... CORE_BUF_38 + 4: + index = (addr - CORE_BUF_20) >> 2; + ret = s->buf[index]; + break; + default: + qemu_log_mask(LOG_UNIMP, "invalid read: %x", (uint32_t)addr); + break; + } + + trace_loongson_ipi_read(size, (uint64_t)addr, ret); + *data = ret; + return MEMTX_OK; +} + +static MemTxResult loongson_ipi_iocsr_readl(void *opaque, hwaddr addr, + uint64_t *data, + unsigned size, MemTxAttrs attrs) +{ + LoongsonIPICommonState *ipi = opaque; + IPICore *s; + + if (attrs.requester_id >= ipi->num_cpu) { + return MEMTX_DECODE_ERROR; + } + + s = &ipi->cpu[attrs.requester_id]; + return loongson_ipi_core_readl(s, addr, data, size, attrs); +} + +static MemTxResult send_ipi_data(LoongsonIPICommonState *ipi, CPUState *cpu, + uint64_t val, + hwaddr addr, MemTxAttrs attrs) +{ + int i, mask = 0, data = 0; + AddressSpace *iocsr_as; + LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_GET_CLASS(ipi); + + iocsr_as = NULL; + if (licc->get_iocsr_as) { + iocsr_as = licc->get_iocsr_as(cpu); + } + + if (!iocsr_as) { + return MEMTX_DECODE_ERROR; + } + + /* + * bit 27-30 is mask for byte writing, + * if the mask is 0, we need not to do anything. + */ + if ((val >> 27) & 0xf) { + data = address_space_ldl_le(iocsr_as, addr, attrs, NULL); + for (i = 0; i < 4; i++) { + /* get mask for byte writing */ + if (val & (0x1 << (27 + i))) { + mask |= 0xff << (i * 8); + } + } + } + + data &= mask; + data |= (val >> 32) & ~mask; + address_space_stl_le(iocsr_as, addr, data, attrs, NULL); + + return MEMTX_OK; +} + +static CPUState *get_cpu_by_arch_id(LoongsonIPICommonState *ipi, uint32_t cpuid) +{ + LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_GET_CLASS(ipi); + + if (licc->cpu_by_arch_id) { + return licc->cpu_by_arch_id(cpuid); + } + + return cpu_by_arch_id(cpuid); +} + +static MemTxResult mail_send(LoongsonIPICommonState *ipi, uint64_t val, + MemTxAttrs attrs) +{ + uint32_t cpuid; + hwaddr addr; + CPUState *cs; + + cpuid = extract32(val, 16, 10); + cs = get_cpu_by_arch_id(ipi, cpuid); + if (cs == NULL) { + return MEMTX_DECODE_ERROR; + } + + /* override requester_id */ + addr = SMP_IPI_MAILBOX + CORE_BUF_20 + (val & 0x1c); + attrs.requester_id = cs->cpu_index; + return send_ipi_data(ipi, cs, val, addr, attrs); +} + +static MemTxResult any_send(LoongsonIPICommonState *ipi, uint64_t val, + MemTxAttrs attrs) +{ + uint32_t cpuid; + hwaddr addr; + CPUState *cs; + + cpuid = extract32(val, 16, 10); + cs = get_cpu_by_arch_id(ipi, cpuid); + if (cs == NULL) { + return MEMTX_DECODE_ERROR; + } + + /* override requester_id */ + addr = val & 0xffff; + attrs.requester_id = cs->cpu_index; + return send_ipi_data(ipi, cs, val, addr, attrs); +} + +static MemTxResult loongson_ipi_core_writel(void *opaque, hwaddr addr, + uint64_t val, unsigned size, + MemTxAttrs attrs) +{ + IPICore *s = opaque; + LoongsonIPICommonState *ipi = s->ipi; + int index = 0; + uint32_t cpuid; + uint8_t vector; + CPUState *cs; + + addr &= 0xff; + trace_loongson_ipi_write(size, (uint64_t)addr, val); + switch (addr) { + case CORE_STATUS_OFF: + qemu_log_mask(LOG_GUEST_ERROR, "can not be written"); + break; + case CORE_EN_OFF: + s->en = val; + break; + case CORE_SET_OFF: + s->status |= val; + if (s->status != 0 && (s->status & s->en) != 0) { + qemu_irq_raise(s->irq); + } + break; + case CORE_CLEAR_OFF: + s->status &= ~val; + if (s->status == 0 && s->en != 0) { + qemu_irq_lower(s->irq); + } + break; + case CORE_BUF_20 ... CORE_BUF_38 + 4: + index = (addr - CORE_BUF_20) >> 2; + s->buf[index] = val; + break; + case IOCSR_IPI_SEND: + cpuid = extract32(val, 16, 10); + /* IPI status vector */ + vector = extract8(val, 0, 5); + cs = get_cpu_by_arch_id(ipi, cpuid); + if (cs == NULL || cs->cpu_index >= ipi->num_cpu) { + return MEMTX_DECODE_ERROR; + } + loongson_ipi_core_writel(&ipi->cpu[cs->cpu_index], CORE_SET_OFF, + BIT(vector), 4, attrs); + break; + default: + qemu_log_mask(LOG_UNIMP, "invalid write: %x", (uint32_t)addr); + break; + } + + return MEMTX_OK; +} + +static MemTxResult loongson_ipi_iocsr_writel(void *opaque, hwaddr addr, + uint64_t val, unsigned size, + MemTxAttrs attrs) +{ + LoongsonIPICommonState *ipi = opaque; + IPICore *s; + + if (attrs.requester_id >= ipi->num_cpu) { + return MEMTX_DECODE_ERROR; + } + + s = &ipi->cpu[attrs.requester_id]; + return loongson_ipi_core_writel(s, addr, val, size, attrs); +} + +static const MemoryRegionOps loongson_ipi_iocsr_ops = { + .read_with_attrs = loongson_ipi_iocsr_readl, + .write_with_attrs = loongson_ipi_iocsr_writel, + .impl.min_access_size = 4, + .impl.max_access_size = 4, + .valid.min_access_size = 4, + .valid.max_access_size = 8, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +/* mail send and any send only support writeq */ +static MemTxResult loongson_ipi_writeq(void *opaque, hwaddr addr, uint64_t val, + unsigned size, MemTxAttrs attrs) +{ + MemTxResult ret = MEMTX_OK; + LoongsonIPICommonState *ipi = opaque; + + addr &= 0xfff; + switch (addr) { + case MAIL_SEND_OFFSET: + ret = mail_send(ipi, val, attrs); + break; + case ANY_SEND_OFFSET: + ret = any_send(ipi, val, attrs); + break; + default: + break; + } + + return ret; +} + +static const MemoryRegionOps loongson_ipi64_ops = { + .write_with_attrs = loongson_ipi_writeq, + .impl.min_access_size = 8, + .impl.max_access_size = 8, + .valid.min_access_size = 8, + .valid.max_access_size = 8, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static void loongson_ipi_common_realize(DeviceState *dev, Error **errp) +{ + LoongsonIPICommonState *s = LOONGSON_IPI_COMMON(dev); + SysBusDevice *sbd = SYS_BUS_DEVICE(dev); + int i; + + if (s->num_cpu == 0) { + error_setg(errp, "num-cpu must be at least 1"); + return; + } + + memory_region_init_io(&s->ipi_iocsr_mem, OBJECT(dev), + &loongson_ipi_iocsr_ops, + s, "loongson_ipi_iocsr", 0x48); + + /* loongson_ipi_iocsr performs re-entrant IO through ipi_send */ + s->ipi_iocsr_mem.disable_reentrancy_guard = true; + + sysbus_init_mmio(sbd, &s->ipi_iocsr_mem); + + memory_region_init_io(&s->ipi64_iocsr_mem, OBJECT(dev), + &loongson_ipi64_ops, + s, "loongson_ipi64_iocsr", 0x118); + sysbus_init_mmio(sbd, &s->ipi64_iocsr_mem); + + s->cpu = g_new0(IPICore, s->num_cpu); + if (s->cpu == NULL) { + error_setg(errp, "Memory allocation for IPICore faile"); + return; + } + + for (i = 0; i < s->num_cpu; i++) { + s->cpu[i].ipi = s; + qdev_init_gpio_out(dev, &s->cpu[i].irq, 1); + } +} + +static int loongson_ipi_pre_save(void *opaque) +{ + LoongsonIPICommonState *s = (LoongsonIPICommonState *)opaque; + LoongsonIPICommonClass *c = LOONGSON_IPI_COMMON_GET_CLASS(s); + + if (c->pre_save) { + c->pre_save(s); + } + + return 0; +} + +static int loongson_ipi_post_load(void *opaque, int version_id) +{ + LoongsonIPICommonState *s = (LoongsonIPICommonState *)opaque; + LoongsonIPICommonClass *c = LOONGSON_IPI_COMMON_GET_CLASS(s); + + if (c->post_load) { + c->post_load(s); + } + return 0; +} + +static const VMStateDescription vmstate_ipi_core = { + .name = "ipi-single", + .version_id = 2, + .minimum_version_id = 2, + .fields = (const VMStateField[]) { + VMSTATE_UINT32(status, IPICore), + VMSTATE_UINT32(en, IPICore), + VMSTATE_UINT32(set, IPICore), + VMSTATE_UINT32(clear, IPICore), + VMSTATE_UINT32_ARRAY(buf, IPICore, IPI_MBX_NUM * 2), + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_loongson_ipi = { + /* Fixed name to keep compatible */ + .name = "loongson_ipi", + .pre_save = loongson_ipi_pre_save, + .post_load = loongson_ipi_post_load, + .version_id = 2, + .minimum_version_id = 2, + .fields = (const VMStateField[]) { + VMSTATE_STRUCT_VARRAY_POINTER_UINT32(cpu, LoongsonIPICommonState, + num_cpu, vmstate_ipi_core, IPICore), + VMSTATE_END_OF_LIST() + } +}; + +static Property ipi_properties[] = { + DEFINE_PROP_UINT32("num-cpu", LoongsonIPICommonState, num_cpu, 1), + DEFINE_PROP_END_OF_LIST(), +}; + +static void loongson_ipi_common_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = loongson_ipi_common_realize; + device_class_set_props(dc, ipi_properties); + dc->vmsd = &vmstate_loongson_ipi; +} + +static void loongson_ipi_common_finalize(Object *obj) +{ + LoongsonIPICommonState *s = LOONGSON_IPI_COMMON(obj); + + g_free(s->cpu); +} + +static const TypeInfo loongson_ipi_common_info = { + .name = TYPE_LOONGSON_IPI_COMMON, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(LoongsonIPICommonState), + .class_size = sizeof(LoongsonIPICommonClass), + .class_init = loongson_ipi_common_class_init, + .instance_finalize = loongson_ipi_common_finalize, + .abstract = true, +}; + +static void loongson_ipi_common_register_types(void) +{ + type_register_static(&loongson_ipi_common_info); +} + +type_init(loongson_ipi_common_register_types) diff --git a/include/hw/intc/loongson_ipi_common.h b/include/hw/intc/loongson_ipi_common.h new file mode 100644 index 0000000000..1f074863e6 --- /dev/null +++ b/include/hw/intc/loongson_ipi_common.h @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Loongson ipi interrupt header files + * + * Copyright (C) 2021 Loongson Technology Corporation Limited + */ + +#ifndef HW_LOONGSON_IPI_COMMON_H +#define HW_LOONGSON_IPI_COMMON_H + +#include "hw/sysbus.h" +#include "hw/core/cpu.h" +#include "qom/object.h" + +/* Mainy used by iocsr read and write */ +#define SMP_IPI_MAILBOX 0x1000ULL +#define CORE_STATUS_OFF 0x0 +#define CORE_EN_OFF 0x4 +#define CORE_SET_OFF 0x8 +#define CORE_CLEAR_OFF 0xc +#define CORE_BUF_20 0x20 +#define CORE_BUF_28 0x28 +#define CORE_BUF_30 0x30 +#define CORE_BUF_38 0x38 +#define IOCSR_IPI_SEND 0x40 +#define IOCSR_MAIL_SEND 0x48 +#define IOCSR_ANY_SEND 0x158 + +#define MAIL_SEND_ADDR (SMP_IPI_MAILBOX + IOCSR_MAIL_SEND) +#define MAIL_SEND_OFFSET 0 +#define ANY_SEND_OFFSET (IOCSR_ANY_SEND - IOCSR_MAIL_SEND) + +#define IPI_MBX_NUM 4 + +#define TYPE_LOONGSON_IPI_COMMON "loongson_ipi_common" +typedef struct LoongsonIPICommonClass LoongsonIPICommonClass; +typedef struct LoongsonIPICommonState LoongsonIPICommonState; +DECLARE_OBJ_CHECKERS(LoongsonIPICommonState, LoongsonIPICommonClass, + LOONGSON_IPI_COMMON, TYPE_LOONGSON_IPI_COMMON) + +typedef struct IPICore { + LoongsonIPICommonState *ipi; + uint32_t status; + uint32_t en; + uint32_t set; + uint32_t clear; + /* 64bit buf divide into 2 32bit buf */ + uint32_t buf[IPI_MBX_NUM * 2]; + qemu_irq irq; +} IPICore; + +struct LoongsonIPICommonState { + SysBusDevice parent_obj; + MemoryRegion ipi_iocsr_mem; + MemoryRegion ipi64_iocsr_mem; + uint32_t num_cpu; + IPICore *cpu; +}; + +struct LoongsonIPICommonClass { + /*< private >*/ + SysBusDeviceClass parent_class; + /*< public >*/ + + void (*pre_save)(LoongsonIPICommonState *s); + void (*post_load)(LoongsonIPICommonState *s); + AddressSpace *(*get_iocsr_as)(CPUState *cpu); + CPUState *(*cpu_by_arch_id)(int64_t id); +}; + +#endif