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Tue, 26 Oct 2021 06:43:52 +0000 From: Anup Patel To: Peter Maydell , Palmer Dabbelt , Alistair Francis , Sagar Karandikar Subject: [PATCH v4 18/22] hw/intc: Add RISC-V AIA APLIC device emulation Date: Tue, 26 Oct 2021 12:12:23 +0530 Message-Id: <20211026064227.2014502-19-anup.patel@wdc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211026064227.2014502-1-anup.patel@wdc.com> References: <20211026064227.2014502-1-anup.patel@wdc.com> Content-Type: text/plain; charset=ascii Content-Transfer-Encoding: 8bit X-ClientProxiedBy: MA1PR01CA0161.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:71::31) To CO6PR04MB7812.namprd04.prod.outlook.com (2603:10b6:303:138::6) MIME-Version: 1.0 Received: from wdc.com (122.162.126.221) by MA1PR01CA0161.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:71::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4628.22 via Frontend Transport; Tue, 26 Oct 2021 06:43:49 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 06213b55-75a9-43ba-0c78-08d9984bf92d X-MS-TrafficTypeDiagnostic: CO6PR04MB8379: X-Microsoft-Antispam-PRVS: WDCIPOUTBOUND: EOP-TRUE X-MS-Oob-TLC-OOBClassifiers: OLM:313; 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envelope-from=prvs=9269cd5e3=Anup.Patel@wdc.com; helo=esa4.hgst.iphmx.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-riscv@nongnu.org, Anup Patel , Anup Patel , qemu-devel@nongnu.org, Atish Patra , Bin Meng Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The RISC-V AIA (Advanced Interrupt Architecture) defines a new interrupt controller for wired interrupts called APLIC (Advanced Platform Level Interrupt Controller). The APLIC is capabable of forwarding wired interupts to RISC-V HARTs directly or as MSIs (Message Signaled Interupts). This patch adds device emulation for RISC-V AIA APLIC. Signed-off-by: Anup Patel --- hw/intc/Kconfig | 3 + hw/intc/meson.build | 1 + hw/intc/riscv_aplic.c | 970 ++++++++++++++++++++++++++++++++++ include/hw/intc/riscv_aplic.h | 73 +++ 4 files changed, 1047 insertions(+) create mode 100644 hw/intc/riscv_aplic.c create mode 100644 include/hw/intc/riscv_aplic.h diff --git a/hw/intc/Kconfig b/hw/intc/Kconfig index 78aed93c45..1592623233 100644 --- a/hw/intc/Kconfig +++ b/hw/intc/Kconfig @@ -65,6 +65,9 @@ config LOONGSON_LIOINTC config RISCV_ACLINT bool +config RISCV_APLIC + bool + config SIFIVE_PLIC bool diff --git a/hw/intc/meson.build b/hw/intc/meson.build index c89d2ca180..77b068f673 100644 --- a/hw/intc/meson.build +++ b/hw/intc/meson.build @@ -47,6 +47,7 @@ specific_ss.add(when: 'CONFIG_S390_FLIC', if_true: files('s390_flic.c')) specific_ss.add(when: 'CONFIG_S390_FLIC_KVM', if_true: files('s390_flic_kvm.c')) specific_ss.add(when: 'CONFIG_SH_INTC', if_true: files('sh_intc.c')) specific_ss.add(when: 'CONFIG_RISCV_ACLINT', if_true: files('riscv_aclint.c')) +specific_ss.add(when: 'CONFIG_RISCV_APLIC', if_true: files('riscv_aplic.c')) specific_ss.add(when: 'CONFIG_SIFIVE_PLIC', if_true: files('sifive_plic.c')) specific_ss.add(when: 'CONFIG_XICS', if_true: files('xics.c')) specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_XICS'], diff --git a/hw/intc/riscv_aplic.c b/hw/intc/riscv_aplic.c new file mode 100644 index 0000000000..f4b8828dac --- /dev/null +++ b/hw/intc/riscv_aplic.c @@ -0,0 +1,970 @@ +/* + * RISC-V APLIC (Advanced Platform Level Interrupt Controller) + * + * Copyright (c) 2021 Western Digital Corporation or its affiliates. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2 or later, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "qemu/log.h" +#include "qemu/module.h" +#include "qemu/error-report.h" +#include "qemu/bswap.h" +#include "exec/address-spaces.h" +#include "hw/sysbus.h" +#include "hw/pci/msi.h" +#include "hw/boards.h" +#include "hw/qdev-properties.h" +#include "hw/intc/riscv_aplic.h" +#include "hw/irq.h" +#include "target/riscv/cpu.h" +#include "sysemu/sysemu.h" +#include "migration/vmstate.h" + +#define APLIC_MAX_IDC (1UL << 14) +#define APLIC_MAX_SOURCE 1024 +#define APLIC_MIN_IPRIO_BITS 1 +#define APLIC_MAX_IPRIO_BITS 8 +#define APLIC_MAX_CHILDREN 1024 + +#define APLIC_DOMAINCFG 0x0000 +#define APLIC_DOMAINCFG_IE (1 << 8) +#define APLIC_DOMAINCFG_DM (1 << 2) +#define APLIC_DOMAINCFG_BE (1 << 0) + +#define APLIC_SOURCECFG_BASE 0x0004 +#define APLIC_SOURCECFG_D (1 << 10) +#define APLIC_SOURCECFG_CHILDIDX_MASK 0x000003ff +#define APLIC_SOURCECFG_SM_MASK 0x00000007 +#define APLIC_SOURCECFG_SM_INACTIVE 0x0 +#define APLIC_SOURCECFG_SM_DETACH 0x1 +#define APLIC_SOURCECFG_SM_EDGE_RISE 0x4 +#define APLIC_SOURCECFG_SM_EDGE_FALL 0x5 +#define APLIC_SOURCECFG_SM_LEVEL_HIGH 0x6 +#define APLIC_SOURCECFG_SM_LEVEL_LOW 0x7 + +#define APLIC_MMSICFGADDR 0x1bc0 +#define APLIC_MMSICFGADDRH 0x1bc4 +#define APLIC_SMSICFGADDR 0x1bc8 +#define APLIC_SMSICFGADDRH 0x1bcc + +#define APLIC_xMSICFGADDRH_L (1UL << 31) +#define APLIC_xMSICFGADDRH_HHXS_MASK 0x1f +#define APLIC_xMSICFGADDRH_HHXS_SHIFT 24 +#define APLIC_xMSICFGADDRH_LHXS_MASK 0x7 +#define APLIC_xMSICFGADDRH_LHXS_SHIFT 20 +#define APLIC_xMSICFGADDRH_HHXW_MASK 0x7 +#define APLIC_xMSICFGADDRH_HHXW_SHIFT 16 +#define APLIC_xMSICFGADDRH_LHXW_MASK 0xf +#define APLIC_xMSICFGADDRH_LHXW_SHIFT 12 +#define APLIC_xMSICFGADDRH_BAPPN_MASK 0xfff + +#define APLIC_xMSICFGADDR_PPN_SHIFT 12 + +#define APLIC_xMSICFGADDR_PPN_HART(__lhxs) \ + ((1UL << (__lhxs)) - 1) + +#define APLIC_xMSICFGADDR_PPN_LHX_MASK(__lhxw) \ + ((1UL << (__lhxw)) - 1) +#define APLIC_xMSICFGADDR_PPN_LHX_SHIFT(__lhxs) \ + ((__lhxs)) +#define APLIC_xMSICFGADDR_PPN_LHX(__lhxw, __lhxs) \ + (APLIC_xMSICFGADDR_PPN_LHX_MASK(__lhxw) << \ + APLIC_xMSICFGADDR_PPN_LHX_SHIFT(__lhxs)) + +#define APLIC_xMSICFGADDR_PPN_HHX_MASK(__hhxw) \ + ((1UL << (__hhxw)) - 1) +#define APLIC_xMSICFGADDR_PPN_HHX_SHIFT(__hhxs) \ + ((__hhxs) + APLIC_xMSICFGADDR_PPN_SHIFT) +#define APLIC_xMSICFGADDR_PPN_HHX(__hhxw, __hhxs) \ + (APLIC_xMSICFGADDR_PPN_HHX_MASK(__hhxw) << \ + APLIC_xMSICFGADDR_PPN_HHX_SHIFT(__hhxs)) + +#define APLIC_xMSICFGADDRH_VALID_MASK \ + (APLIC_xMSICFGADDRH_L | \ + (APLIC_xMSICFGADDRH_HHXS_MASK << APLIC_xMSICFGADDRH_HHXS_SHIFT) | \ + (APLIC_xMSICFGADDRH_LHXS_MASK << APLIC_xMSICFGADDRH_LHXS_SHIFT) | \ + (APLIC_xMSICFGADDRH_HHXW_MASK << APLIC_xMSICFGADDRH_HHXW_SHIFT) | \ + (APLIC_xMSICFGADDRH_LHXW_MASK << APLIC_xMSICFGADDRH_LHXW_SHIFT) | \ + APLIC_xMSICFGADDRH_BAPPN_MASK) + +#define APLIC_SETIP_BASE 0x1c00 +#define APLIC_SETIPNUM 0x1cdc + +#define APLIC_CLRIP_BASE 0x1d00 +#define APLIC_CLRIPNUM 0x1ddc + +#define APLIC_SETIE_BASE 0x1e00 +#define APLIC_SETIENUM 0x1edc + +#define APLIC_CLRIE_BASE 0x1f00 +#define APLIC_CLRIENUM 0x1fdc + +#define APLIC_SETIPNUM_LE 0x2000 +#define APLIC_SETIPNUM_BE 0x2004 + +#define APLIC_ISTATE_PENDING (1U << 0) +#define APLIC_ISTATE_ENABLED (1U << 1) +#define APLIC_ISTATE_ENPEND (APLIC_ISTATE_ENABLED | \ + APLIC_ISTATE_PENDING) +#define APLIC_ISTATE_INPUT (1U << 8) + +#define APLIC_GENMSI 0x3000 + +#define APLIC_TARGET_BASE 0x3004 +#define APLIC_TARGET_HART_IDX_SHIFT 18 +#define APLIC_TARGET_HART_IDX_MASK 0x3fff +#define APLIC_TARGET_GUEST_IDX_SHIFT 12 +#define APLIC_TARGET_GUEST_IDX_MASK 0x3f +#define APLIC_TARGET_IPRIO_MASK 0xff +#define APLIC_TARGET_EIID_MASK 0x7ff + +#define APLIC_IDC_BASE 0x4000 +#define APLIC_IDC_SIZE 32 + +#define APLIC_IDC_IDELIVERY 0x00 + +#define APLIC_IDC_IFORCE 0x04 + +#define APLIC_IDC_ITHRESHOLD 0x08 + +#define APLIC_IDC_TOPI 0x18 +#define APLIC_IDC_TOPI_ID_SHIFT 16 +#define APLIC_IDC_TOPI_ID_MASK 0x3ff +#define APLIC_IDC_TOPI_PRIO_MASK 0xff + +#define APLIC_IDC_CLAIMI 0x1c + +static uint32_t riscv_aplic_read_input_word(RISCVAPLICState *aplic, + uint32_t word) +{ + uint32_t i, irq, ret = 0; + + for (i = 0; i < 32; i++) { + irq = word * 32 + i; + if (!irq || aplic->num_irqs <= irq) { + continue; + } + + ret |= ((aplic->state[irq] & APLIC_ISTATE_INPUT) ? 1 : 0) << i; + } + + return ret; +} + +static uint32_t riscv_aplic_read_pending_word(RISCVAPLICState *aplic, + uint32_t word) +{ + uint32_t i, irq, ret = 0; + + for (i = 0; i < 32; i++) { + irq = word * 32 + i; + if (!irq || aplic->num_irqs <= irq) { + continue; + } + + ret |= ((aplic->state[irq] & APLIC_ISTATE_PENDING) ? 1 : 0) << i; + } + + return ret; +} + +static void riscv_aplic_set_pending_raw(RISCVAPLICState *aplic, + uint32_t irq, bool pending) +{ + if (pending) { + aplic->state[irq] |= APLIC_ISTATE_PENDING; + } else { + aplic->state[irq] &= ~APLIC_ISTATE_PENDING; + } +} + +static void riscv_aplic_set_pending(RISCVAPLICState *aplic, + uint32_t irq, bool pending) +{ + uint32_t sourcecfg, sm; + + if ((irq <= 0) || (aplic->num_irqs <= irq)) { + return; + } + + sourcecfg = aplic->sourcecfg[irq]; + if (sourcecfg & APLIC_SOURCECFG_D) { + return; + } + + sm = sourcecfg & APLIC_SOURCECFG_SM_MASK; + if ((sm == APLIC_SOURCECFG_SM_INACTIVE) || + (!aplic->msimode && ((sm == APLIC_SOURCECFG_SM_LEVEL_HIGH) || + (sm == APLIC_SOURCECFG_SM_LEVEL_LOW)))) { + return; + } + + riscv_aplic_set_pending_raw(aplic, irq, pending); +} + +static void riscv_aplic_set_pending_word(RISCVAPLICState *aplic, + uint32_t word, uint32_t value, + bool pending) +{ + uint32_t i, irq; + + for (i = 0; i < 32; i++) { + irq = word * 32 + i; + if (!irq || aplic->num_irqs <= irq) { + continue; + } + + if (value & (1U << i)) { + riscv_aplic_set_pending(aplic, irq, pending); + } + } +} + +static uint32_t riscv_aplic_read_enabled_word(RISCVAPLICState *aplic, + int word) +{ + uint32_t i, irq, ret = 0; + + for (i = 0; i < 32; i++) { + irq = word * 32 + i; + if (!irq || aplic->num_irqs <= irq) { + continue; + } + + ret |= ((aplic->state[irq] & APLIC_ISTATE_ENABLED) ? 1 : 0) << i; + } + + return ret; +} + +static void riscv_aplic_set_enabled_raw(RISCVAPLICState *aplic, + uint32_t irq, bool enabled) +{ + if (enabled) { + aplic->state[irq] |= APLIC_ISTATE_ENABLED; + } else { + aplic->state[irq] &= ~APLIC_ISTATE_ENABLED; + } +} + +static void riscv_aplic_set_enabled(RISCVAPLICState *aplic, + uint32_t irq, bool enabled) +{ + uint32_t sourcecfg, sm; + + if ((irq <= 0) || (aplic->num_irqs <= irq)) { + return; + } + + sourcecfg = aplic->sourcecfg[irq]; + if (sourcecfg & APLIC_SOURCECFG_D) { + return; + } + + sm = sourcecfg & APLIC_SOURCECFG_SM_MASK; + if (sm == APLIC_SOURCECFG_SM_INACTIVE) { + return; + } + + riscv_aplic_set_enabled_raw(aplic, irq, enabled); +} + +static void riscv_aplic_set_enabled_word(RISCVAPLICState *aplic, + uint32_t word, uint32_t value, + bool enabled) +{ + uint32_t i, irq; + + for (i = 0; i < 32; i++) { + irq = word * 32 + i; + if (!irq || aplic->num_irqs <= irq) { + continue; + } + + if (value & (1U << i)) { + riscv_aplic_set_enabled(aplic, irq, enabled); + } + } +} + +static void riscv_aplic_msi_send(RISCVAPLICState *aplic, + uint32_t hart_idx, uint32_t guest_idx, + uint32_t eiid) +{ + uint64_t addr; + MemTxResult result; + RISCVAPLICState *aplic_m; + uint32_t lhxs, lhxw, hhxs, hhxw, group_idx, msicfgaddr, msicfgaddrH; + + aplic_m = aplic; + while (aplic_m && !aplic_m->mmode) { + aplic_m = aplic_m->parent; + } + if (!aplic_m) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: m-level APLIC not found\n", + __func__); + return; + } + + if (aplic->mmode) { + msicfgaddr = aplic_m->mmsicfgaddr; + msicfgaddrH = aplic_m->mmsicfgaddrH; + } else { + msicfgaddr = aplic_m->smsicfgaddr; + msicfgaddrH = aplic_m->smsicfgaddrH; + } + + lhxs = (msicfgaddrH >> APLIC_xMSICFGADDRH_LHXS_SHIFT) & + APLIC_xMSICFGADDRH_LHXS_MASK; + lhxw = (msicfgaddrH >> APLIC_xMSICFGADDRH_LHXW_SHIFT) & + APLIC_xMSICFGADDRH_LHXW_MASK; + hhxs = (msicfgaddrH >> APLIC_xMSICFGADDRH_HHXS_SHIFT) & + APLIC_xMSICFGADDRH_HHXS_MASK; + hhxw = (msicfgaddrH >> APLIC_xMSICFGADDRH_HHXW_SHIFT) & + APLIC_xMSICFGADDRH_HHXW_MASK; + + group_idx = hart_idx >> lhxw; + hart_idx &= APLIC_xMSICFGADDR_PPN_LHX_MASK(lhxw); + + addr = msicfgaddr; + addr |= ((uint64_t)(msicfgaddrH & APLIC_xMSICFGADDRH_BAPPN_MASK)) << 32; + addr |= ((uint64_t)(group_idx & APLIC_xMSICFGADDR_PPN_HHX_MASK(hhxw))) << + APLIC_xMSICFGADDR_PPN_HHX_SHIFT(hhxs); + addr |= ((uint64_t)(hart_idx & APLIC_xMSICFGADDR_PPN_LHX_MASK(lhxw))) << + APLIC_xMSICFGADDR_PPN_LHX_SHIFT(lhxs); + addr |= (uint64_t)(guest_idx & APLIC_xMSICFGADDR_PPN_HART(lhxs)); + addr <<= APLIC_xMSICFGADDR_PPN_SHIFT; + + address_space_stl_le(&address_space_memory, addr, + eiid, MEMTXATTRS_UNSPECIFIED, &result); + if (result != MEMTX_OK) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: MSI write failed for " + "hart_index=%d guest_index=%d eiid=%d\n", + __func__, hart_idx, guest_idx, eiid); + } +} + +static void riscv_aplic_msi_irq_update(RISCVAPLICState *aplic, uint32_t irq) +{ + uint32_t hart_idx, guest_idx, eiid; + + if (!aplic->msimode || (aplic->num_irqs <= irq) || + !(aplic->domaincfg & APLIC_DOMAINCFG_IE)) { + return; + } + + if ((aplic->state[irq] & APLIC_ISTATE_ENPEND) != APLIC_ISTATE_ENPEND) { + return; + } + + riscv_aplic_set_pending_raw(aplic, irq, false); + + hart_idx = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT; + hart_idx &= APLIC_TARGET_HART_IDX_MASK; + if (aplic->mmode) { + /* M-level APLIC ignores guest_index */ + guest_idx = 0; + } else { + guest_idx = aplic->target[irq] >> APLIC_TARGET_GUEST_IDX_SHIFT; + guest_idx &= APLIC_TARGET_GUEST_IDX_MASK; + } + eiid = aplic->target[irq] & APLIC_TARGET_EIID_MASK; + riscv_aplic_msi_send(aplic, hart_idx, guest_idx, eiid); +} + +static uint32_t riscv_aplic_idc_topi(RISCVAPLICState *aplic, uint32_t idc) +{ + uint32_t best_irq, best_iprio; + uint32_t irq, iprio, ihartidx, ithres; + + if (aplic->num_harts <= idc) { + return 0; + } + + ithres = aplic->ithreshold[idc]; + if (!ithres) { + return 0; + } + + best_irq = best_iprio = UINT32_MAX; + for (irq = 1; irq < aplic->num_irqs; irq++) { + if ((aplic->state[irq] & APLIC_ISTATE_ENPEND) != + APLIC_ISTATE_ENPEND) { + continue; + } + + ihartidx = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT; + ihartidx &= APLIC_TARGET_HART_IDX_MASK; + if (ihartidx != idc) { + continue; + } + + iprio = aplic->target[irq] & aplic->iprio_mask; + if (iprio >= ithres) { + continue; + } + + if (iprio < best_iprio) { + best_irq = irq; + best_iprio = iprio; + } + } + + if (best_irq < aplic->num_irqs && best_iprio <= aplic->iprio_mask) { + return (best_irq << APLIC_IDC_TOPI_ID_SHIFT) | best_iprio; + } + + return 0; +} + +static void riscv_aplic_idc_update(RISCVAPLICState *aplic, uint32_t idc) +{ + uint32_t topi; + + if (aplic->msimode || aplic->num_harts <= idc) { + return; + } + + topi = riscv_aplic_idc_topi(aplic, idc); + if ((aplic->domaincfg & APLIC_DOMAINCFG_IE) && + aplic->idelivery[idc] && + (aplic->iforce[idc] || topi)) { + qemu_irq_raise(aplic->external_irqs[idc]); + } else { + qemu_irq_lower(aplic->external_irqs[idc]); + } +} + +static uint32_t riscv_aplic_idc_claimi(RISCVAPLICState *aplic, uint32_t idc) +{ + uint32_t irq, state, sm, topi = riscv_aplic_idc_topi(aplic, idc); + + if (!topi) { + aplic->iforce[idc] = 0; + return 0; + } + + irq = (topi >> APLIC_IDC_TOPI_ID_SHIFT) & APLIC_IDC_TOPI_ID_MASK; + sm = aplic->sourcecfg[irq] & APLIC_SOURCECFG_SM_MASK; + state = aplic->state[irq]; + riscv_aplic_set_pending_raw(aplic, irq, false); + if ((sm == APLIC_SOURCECFG_SM_LEVEL_HIGH) && + (state & APLIC_ISTATE_INPUT)) { + riscv_aplic_set_pending_raw(aplic, irq, true); + } else if ((sm == APLIC_SOURCECFG_SM_LEVEL_LOW) && + !(state & APLIC_ISTATE_INPUT)) { + riscv_aplic_set_pending_raw(aplic, irq, true); + } + riscv_aplic_idc_update(aplic, idc); + + return topi; +} + +static void riscv_aplic_request(void *opaque, int irq, int level) +{ + bool update = false; + RISCVAPLICState *aplic = opaque; + uint32_t sourcecfg, childidx, state, idc; + + assert((0 < irq) && (irq < aplic->num_irqs)); + + sourcecfg = aplic->sourcecfg[irq]; + if (sourcecfg & APLIC_SOURCECFG_D) { + childidx = sourcecfg & APLIC_SOURCECFG_CHILDIDX_MASK; + if (childidx < aplic->num_children) { + riscv_aplic_request(aplic->children[childidx], irq, level); + } + return; + } + + state = aplic->state[irq]; + switch (sourcecfg & APLIC_SOURCECFG_SM_MASK) { + case APLIC_SOURCECFG_SM_EDGE_RISE: + if ((level > 0) && !(state & APLIC_ISTATE_INPUT) && + !(state & APLIC_ISTATE_PENDING)) { + riscv_aplic_set_pending_raw(aplic, irq, true); + update = true; + } + break; + case APLIC_SOURCECFG_SM_EDGE_FALL: + if ((level <= 0) && (state & APLIC_ISTATE_INPUT) && + !(state & APLIC_ISTATE_PENDING)) { + riscv_aplic_set_pending_raw(aplic, irq, true); + update = true; + } + break; + case APLIC_SOURCECFG_SM_LEVEL_HIGH: + if ((level > 0) && !(state & APLIC_ISTATE_PENDING)) { + riscv_aplic_set_pending_raw(aplic, irq, true); + update = true; + } + break; + case APLIC_SOURCECFG_SM_LEVEL_LOW: + if ((level <= 0) && !(state & APLIC_ISTATE_PENDING)) { + riscv_aplic_set_pending_raw(aplic, irq, true); + update = true; + } + break; + default: + break; + } + + if (level <= 0) { + aplic->state[irq] &= ~APLIC_ISTATE_INPUT; + } else { + aplic->state[irq] |= APLIC_ISTATE_INPUT; + } + + if (update) { + if (aplic->msimode) { + riscv_aplic_msi_irq_update(aplic, irq); + } else { + idc = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT; + idc &= APLIC_TARGET_HART_IDX_MASK; + riscv_aplic_idc_update(aplic, idc); + } + } +} + +static uint64_t riscv_aplic_read(void *opaque, hwaddr addr, unsigned size) +{ + uint32_t irq, word, idc; + RISCVAPLICState *aplic = opaque; + + /* Reads must be 4 byte words */ + if ((addr & 0x3) != 0) { + goto err; + } + + if (addr == APLIC_DOMAINCFG) { + return aplic->domaincfg | (aplic->msimode ? APLIC_DOMAINCFG_DM : 0); + } else if ((APLIC_SOURCECFG_BASE <= addr) && + (addr < (APLIC_SOURCECFG_BASE + (aplic->num_irqs - 1) * 4))) { + irq = ((addr - APLIC_SOURCECFG_BASE) >> 2) + 1; + return aplic->sourcecfg[irq]; + } else if (aplic->mmode && aplic->msimode && + (addr == APLIC_MMSICFGADDR)) { + return aplic->mmsicfgaddr; + } else if (aplic->mmode && aplic->msimode && + (addr == APLIC_MMSICFGADDRH)) { + return aplic->mmsicfgaddrH; + } else if (aplic->mmode && aplic->msimode && + (addr == APLIC_SMSICFGADDR)) { + /* Registers SMSICFGADDR and SMSICFGADDRH are implemented only if: + * (a) the interrupt domain is at machine level + * (b) the domain???s harts implement supervisor mode + * (c) the domain has one or more child supervisor-level domains + * that support MSI delivery mode (domaincfg.DM is not read- + * only zero in at least one of the supervisor-level child + * domains). + */ + return (aplic->num_children) ? aplic->smsicfgaddr : 0; + } else if (aplic->mmode && aplic->msimode && + (addr == APLIC_SMSICFGADDRH)) { + return (aplic->num_children) ? aplic->smsicfgaddrH : 0; + } else if ((APLIC_SETIP_BASE <= addr) && + (addr < (APLIC_SETIP_BASE + aplic->bitfield_words * 4))) { + word = (addr - APLIC_SETIP_BASE) >> 2; + return riscv_aplic_read_pending_word(aplic, word); + } else if (addr == APLIC_SETIPNUM) { + return 0; + } else if ((APLIC_CLRIP_BASE <= addr) && + (addr < (APLIC_CLRIP_BASE + aplic->bitfield_words * 4))) { + word = (addr - APLIC_CLRIP_BASE) >> 2; + return riscv_aplic_read_input_word(aplic, word); + } else if (addr == APLIC_CLRIPNUM) { + return 0; + } else if ((APLIC_SETIE_BASE <= addr) && + (addr < (APLIC_SETIE_BASE + aplic->bitfield_words * 4))) { + word = (addr - APLIC_SETIE_BASE) >> 2; + return riscv_aplic_read_enabled_word(aplic, word); + } else if (addr == APLIC_SETIENUM) { + return 0; + } else if ((APLIC_CLRIE_BASE <= addr) && + (addr < (APLIC_CLRIE_BASE + aplic->bitfield_words * 4))) { + return 0; + } else if (addr == APLIC_CLRIENUM) { + return 0; + } else if (addr == APLIC_SETIPNUM_LE) { + return 0; + } else if (addr == APLIC_SETIPNUM_BE) { + return 0; + } else if (addr == APLIC_GENMSI) { + return (aplic->msimode) ? aplic->genmsi : 0; + } else if ((APLIC_TARGET_BASE <= addr) && + (addr < (APLIC_TARGET_BASE + (aplic->num_irqs - 1) * 4))) { + irq = ((addr - APLIC_TARGET_BASE) >> 2) + 1; + return aplic->target[irq]; + } else if (!aplic->msimode && (APLIC_IDC_BASE <= addr) && + (addr < (APLIC_IDC_BASE + aplic->num_harts * APLIC_IDC_SIZE))) { + idc = (addr - APLIC_IDC_BASE) / APLIC_IDC_SIZE; + switch (addr - (APLIC_IDC_BASE + idc * APLIC_IDC_SIZE)) { + case APLIC_IDC_IDELIVERY: + return aplic->idelivery[idc]; + case APLIC_IDC_IFORCE: + return aplic->iforce[idc]; + case APLIC_IDC_ITHRESHOLD: + return aplic->ithreshold[idc]; + case APLIC_IDC_TOPI: + return riscv_aplic_idc_topi(aplic, idc); + case APLIC_IDC_CLAIMI: + return riscv_aplic_idc_claimi(aplic, idc); + default: + goto err; + }; + } + +err: + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Invalid register read 0x%" HWADDR_PRIx "\n", + __func__, addr); + return 0; +} + +static void riscv_aplic_write(void *opaque, hwaddr addr, uint64_t value, + unsigned size) +{ + RISCVAPLICState *aplic = opaque; + uint32_t irq, word, idc = UINT32_MAX; + + /* Writes must be 4 byte words */ + if ((addr & 0x3) != 0) { + goto err; + } + + if (addr == APLIC_DOMAINCFG) { + /* Only IE bit writeable at the moment */ + value &= APLIC_DOMAINCFG_IE; + aplic->domaincfg = value; + } else if ((APLIC_SOURCECFG_BASE <= addr) && + (addr < (APLIC_SOURCECFG_BASE + (aplic->num_irqs - 1) * 4))) { + irq = ((addr - APLIC_SOURCECFG_BASE) >> 2) + 1; + if (!aplic->num_children && (value & APLIC_SOURCECFG_D)) { + value = 0; + } + if (value & APLIC_SOURCECFG_D) { + value &= (APLIC_SOURCECFG_D | APLIC_SOURCECFG_CHILDIDX_MASK); + } else { + value &= (APLIC_SOURCECFG_D | APLIC_SOURCECFG_SM_MASK); + } + aplic->sourcecfg[irq] = value; + if ((aplic->sourcecfg[irq] & APLIC_SOURCECFG_D) || + (aplic->sourcecfg[irq] == 0)) { + riscv_aplic_set_pending_raw(aplic, irq, false); + riscv_aplic_set_enabled_raw(aplic, irq, false); + } + } else if (aplic->mmode && aplic->msimode && + (addr == APLIC_MMSICFGADDR)) { + if (!(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) { + aplic->mmsicfgaddr = value; + } + } else if (aplic->mmode && aplic->msimode && + (addr == APLIC_MMSICFGADDRH)) { + if (!(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) { + aplic->mmsicfgaddrH = value & APLIC_xMSICFGADDRH_VALID_MASK; + } + } else if (aplic->mmode && aplic->msimode && + (addr == APLIC_SMSICFGADDR)) { + /* Registers SMSICFGADDR and SMSICFGADDRH are implemented only if: + * (a) the interrupt domain is at machine level + * (b) the domain???s harts implement supervisor mode + * (c) the domain has one or more child supervisor-level domains + * that support MSI delivery mode (domaincfg.DM is not read- + * only zero in at least one of the supervisor-level child + * domains). + */ + if (aplic->num_children && + !(aplic->smsicfgaddrH & APLIC_xMSICFGADDRH_L)) { + aplic->smsicfgaddr = value; + } + } else if (aplic->mmode && aplic->msimode && + (addr == APLIC_SMSICFGADDRH)) { + if (aplic->num_children && + !(aplic->smsicfgaddrH & APLIC_xMSICFGADDRH_L)) { + aplic->smsicfgaddrH = value & APLIC_xMSICFGADDRH_VALID_MASK; + } + } else if ((APLIC_SETIP_BASE <= addr) && + (addr < (APLIC_SETIP_BASE + aplic->bitfield_words * 4))) { + word = (addr - APLIC_SETIP_BASE) >> 2; + riscv_aplic_set_pending_word(aplic, word, value, true); + } else if (addr == APLIC_SETIPNUM) { + riscv_aplic_set_pending(aplic, value, true); + } else if ((APLIC_CLRIP_BASE <= addr) && + (addr < (APLIC_CLRIP_BASE + aplic->bitfield_words * 4))) { + word = (addr - APLIC_CLRIP_BASE) >> 2; + riscv_aplic_set_pending_word(aplic, word, value, false); + } else if (addr == APLIC_CLRIPNUM) { + riscv_aplic_set_pending(aplic, value, false); + } else if ((APLIC_SETIE_BASE <= addr) && + (addr < (APLIC_SETIE_BASE + aplic->bitfield_words * 4))) { + word = (addr - APLIC_SETIE_BASE) >> 2; + riscv_aplic_set_enabled_word(aplic, word, value, true); + } else if (addr == APLIC_SETIENUM) { + riscv_aplic_set_enabled(aplic, value, true); + } else if ((APLIC_CLRIE_BASE <= addr) && + (addr < (APLIC_CLRIE_BASE + aplic->bitfield_words * 4))) { + word = (addr - APLIC_CLRIE_BASE) >> 2; + riscv_aplic_set_enabled_word(aplic, word, value, false); + } else if (addr == APLIC_CLRIENUM) { + riscv_aplic_set_enabled(aplic, value, false); + } else if (addr == APLIC_SETIPNUM_LE) { + riscv_aplic_set_pending(aplic, value, true); + } else if (addr == APLIC_SETIPNUM_BE) { + riscv_aplic_set_pending(aplic, bswap32(value), true); + } else if (addr == APLIC_GENMSI) { + if (aplic->msimode) { + aplic->genmsi = value & ~(APLIC_TARGET_GUEST_IDX_MASK << + APLIC_TARGET_GUEST_IDX_SHIFT); + riscv_aplic_msi_send(aplic, + value >> APLIC_TARGET_HART_IDX_SHIFT, + 0, + value & APLIC_TARGET_EIID_MASK); + } + } else if ((APLIC_TARGET_BASE <= addr) && + (addr < (APLIC_TARGET_BASE + (aplic->num_irqs - 1) * 4))) { + irq = ((addr - APLIC_TARGET_BASE) >> 2) + 1; + if (aplic->msimode) { + aplic->target[irq] = value; + } else { + aplic->target[irq] = (value & ~APLIC_TARGET_IPRIO_MASK) | + (value & aplic->iprio_mask); + } + } else if (!aplic->msimode && (APLIC_IDC_BASE <= addr) && + (addr < (APLIC_IDC_BASE + aplic->num_harts * APLIC_IDC_SIZE))) { + idc = (addr - APLIC_IDC_BASE) / APLIC_IDC_SIZE; + switch (addr - (APLIC_IDC_BASE + idc * APLIC_IDC_SIZE)) { + case APLIC_IDC_IDELIVERY: + aplic->idelivery[idc] = value & 0x1; + break; + case APLIC_IDC_IFORCE: + aplic->iforce[idc] = value & 0x1; + break; + case APLIC_IDC_ITHRESHOLD: + aplic->ithreshold[idc] = value & aplic->iprio_mask; + break; + default: + goto err; + }; + } else { + goto err; + } + + if (aplic->msimode) { + for (irq = 1; irq < aplic->num_irqs; irq++) { + riscv_aplic_msi_irq_update(aplic, irq); + } + } else { + if (idc == UINT32_MAX) { + for (idc = 0; idc < aplic->num_harts; idc++) { + riscv_aplic_idc_update(aplic, idc); + } + } else { + riscv_aplic_idc_update(aplic, idc); + } + } + + return; + +err: + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Invalid register write 0x%" HWADDR_PRIx "\n", + __func__, addr); +} + +static const MemoryRegionOps riscv_aplic_ops = { + .read = riscv_aplic_read, + .write = riscv_aplic_write, + .endianness = DEVICE_LITTLE_ENDIAN, + .valid = { + .min_access_size = 4, + .max_access_size = 4 + } +}; + +static void riscv_aplic_realize(DeviceState *dev, Error **errp) +{ + uint32_t i; + RISCVAPLICState *aplic = RISCV_APLIC(dev); + + aplic->bitfield_words = (aplic->num_irqs + 31) >> 5; + aplic->sourcecfg = g_new0(uint32_t, aplic->num_irqs); + aplic->state = g_new(uint32_t, aplic->num_irqs); + aplic->target = g_new0(uint32_t, aplic->num_irqs); + aplic->idelivery = g_new0(uint32_t, aplic->num_harts); + aplic->iforce = g_new0(uint32_t, aplic->num_harts); + aplic->ithreshold = g_new0(uint32_t, aplic->num_harts); + + memory_region_init_io(&aplic->mmio, OBJECT(dev), &riscv_aplic_ops, aplic, + TYPE_RISCV_APLIC, aplic->aperture_size); + sysbus_init_mmio(SYS_BUS_DEVICE(dev), &aplic->mmio); + + /* Only root APLICs have hardware IRQ lines. All non-root APLICs + * have IRQ lines delegated by their parent APLIC. + */ + if (!aplic->parent) { + qdev_init_gpio_in(dev, riscv_aplic_request, aplic->num_irqs); + } + + /* Create output IRQ lines for non-MSI mode */ + if (!aplic->msimode) { + aplic->external_irqs = g_malloc(sizeof(qemu_irq) * aplic->num_harts); + qdev_init_gpio_out(dev, aplic->external_irqs, aplic->num_harts); + + /* Claim the CPU interrupt to be triggered by this APLIC */ + for (i = 0; i < aplic->num_harts; i++) { + RISCVCPU *cpu = RISCV_CPU(qemu_get_cpu(aplic->hartid_base + i)); + if (riscv_cpu_claim_interrupts(cpu, + (aplic->mmode) ? MIP_MEIP : MIP_SEIP) < 0) { + error_report("%s already claimed", + (aplic->mmode) ? "MEIP" : "SEIP"); + exit(1); + } + } + } + + msi_nonbroken = true; +} + +static Property riscv_aplic_properties[] = { + DEFINE_PROP_UINT32("aperture-size", RISCVAPLICState, aperture_size, 0), + DEFINE_PROP_UINT32("hartid-base", RISCVAPLICState, hartid_base, 0), + DEFINE_PROP_UINT32("num-harts", RISCVAPLICState, num_harts, 0), + DEFINE_PROP_UINT32("iprio-mask", RISCVAPLICState, iprio_mask, 0), + DEFINE_PROP_UINT32("num-irqs", RISCVAPLICState, num_irqs, 0), + DEFINE_PROP_BOOL("msimode", RISCVAPLICState, msimode, 0), + DEFINE_PROP_BOOL("mmode", RISCVAPLICState, mmode, 0), + DEFINE_PROP_END_OF_LIST(), +}; + +static const VMStateDescription vmstate_riscv_aplic = { + .name = "riscv_aplic", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32(domaincfg, RISCVAPLICState), + VMSTATE_UINT32(mmsicfgaddr, RISCVAPLICState), + VMSTATE_UINT32(mmsicfgaddrH, RISCVAPLICState), + VMSTATE_UINT32(smsicfgaddr, RISCVAPLICState), + VMSTATE_UINT32(smsicfgaddrH, RISCVAPLICState), + VMSTATE_UINT32(genmsi, RISCVAPLICState), + VMSTATE_VARRAY_UINT32(sourcecfg, RISCVAPLICState, + num_irqs, 0, + vmstate_info_uint32, uint32_t), + VMSTATE_VARRAY_UINT32(state, RISCVAPLICState, + num_irqs, 0, + vmstate_info_uint32, uint32_t), + VMSTATE_VARRAY_UINT32(target, RISCVAPLICState, + num_irqs, 0, + vmstate_info_uint32, uint32_t), + VMSTATE_VARRAY_UINT32(idelivery, RISCVAPLICState, + num_harts, 0, + vmstate_info_uint32, uint32_t), + VMSTATE_VARRAY_UINT32(iforce, RISCVAPLICState, + num_harts, 0, + vmstate_info_uint32, uint32_t), + VMSTATE_VARRAY_UINT32(ithreshold, RISCVAPLICState, + num_harts, 0, + vmstate_info_uint32, uint32_t), + VMSTATE_END_OF_LIST() + } +}; + +static void riscv_aplic_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + device_class_set_props(dc, riscv_aplic_properties); + dc->realize = riscv_aplic_realize; + dc->vmsd = &vmstate_riscv_aplic; +} + +static const TypeInfo riscv_aplic_info = { + .name = TYPE_RISCV_APLIC, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(RISCVAPLICState), + .class_init = riscv_aplic_class_init, +}; + +static void riscv_aplic_register_types(void) +{ + type_register_static(&riscv_aplic_info); +} + +type_init(riscv_aplic_register_types) + +/* + * Add a APLIC device to another APLIC device as child for + * interrupt delegation. + */ +void riscv_aplic_add_child(DeviceState *parent, DeviceState *child) +{ + RISCVAPLICState *caplic, *paplic; + + assert(parent && child); + caplic = RISCV_APLIC(child); + paplic = RISCV_APLIC(parent); + + assert(paplic->num_irqs == caplic->num_irqs); + assert(paplic->num_children <= QEMU_APLIC_MAX_CHILDREN); + + caplic->parent = paplic; + paplic->children[paplic->num_children] = caplic; + paplic->num_children++; +} + +/* + * Create APLIC device. + */ +DeviceState *riscv_aplic_create(hwaddr addr, hwaddr size, + uint32_t hartid_base, uint32_t num_harts, uint32_t num_sources, + uint32_t iprio_bits, bool msimode, bool mmode, DeviceState *parent) +{ + DeviceState *dev = qdev_new(TYPE_RISCV_APLIC); + uint32_t i; + + assert(num_harts < APLIC_MAX_IDC); + assert((APLIC_IDC_BASE + (num_harts * APLIC_IDC_SIZE)) <= size); + assert(num_sources < APLIC_MAX_SOURCE); + assert(APLIC_MIN_IPRIO_BITS <= iprio_bits); + assert(iprio_bits <= APLIC_MAX_IPRIO_BITS); + + qdev_prop_set_uint32(dev, "aperture-size", size); + qdev_prop_set_uint32(dev, "hartid-base", hartid_base); + qdev_prop_set_uint32(dev, "num-harts", num_harts); + qdev_prop_set_uint32(dev, "iprio-mask", ((1U << iprio_bits) - 1)); + qdev_prop_set_uint32(dev, "num-irqs", num_sources + 1); + qdev_prop_set_bit(dev, "msimode", msimode); + qdev_prop_set_bit(dev, "mmode", mmode); + + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr); + + if (parent) { + riscv_aplic_add_child(parent, dev); + } + + if (!msimode) { + for (i = 0; i < num_harts; i++) { + CPUState *cpu = qemu_get_cpu(hartid_base + i); + + qdev_connect_gpio_out_named(dev, NULL, i, + qdev_get_gpio_in(DEVICE(cpu), + (mmode) ? IRQ_M_EXT : IRQ_S_EXT)); + } + } + + return dev; +} diff --git a/include/hw/intc/riscv_aplic.h b/include/hw/intc/riscv_aplic.h new file mode 100644 index 0000000000..d96d7b38c1 --- /dev/null +++ b/include/hw/intc/riscv_aplic.h @@ -0,0 +1,73 @@ +/* + * RISC-V APLIC (Advanced Platform Level Interrupt Controller) interface + * + * Copyright (c) 2021 Western Digital Corporation or its affiliates. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2 or later, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + */ + +#ifndef HW_RISCV_APLIC_H +#define HW_RISCV_APLIC_H + +#include "hw/sysbus.h" +#include "qom/object.h" + +#define TYPE_RISCV_APLIC "riscv.aplic" + +typedef struct RISCVAPLICState RISCVAPLICState; +DECLARE_INSTANCE_CHECKER(RISCVAPLICState, RISCV_APLIC, TYPE_RISCV_APLIC) + +struct RISCVAPLICState { + /*< private >*/ + SysBusDevice parent_obj; + qemu_irq *external_irqs; + + /*< public >*/ + MemoryRegion mmio; + uint32_t bitfield_words; + uint32_t domaincfg; + uint32_t mmsicfgaddr; + uint32_t mmsicfgaddrH; + uint32_t smsicfgaddr; + uint32_t smsicfgaddrH; + uint32_t genmsi; + uint32_t *sourcecfg; + uint32_t *state; + uint32_t *target; + uint32_t *idelivery; + uint32_t *iforce; + uint32_t *ithreshold; + + /* topology */ +#define QEMU_APLIC_MAX_CHILDREN 16 + struct RISCVAPLICState *parent; + struct RISCVAPLICState *children[QEMU_APLIC_MAX_CHILDREN]; + uint16_t num_children; + + /* config */ + uint32_t aperture_size; + uint32_t hartid_base; + uint32_t num_harts; + uint32_t iprio_mask; + uint32_t num_irqs; + bool msimode; + bool mmode; +}; + +void riscv_aplic_add_child(DeviceState *parent, DeviceState *child); + +DeviceState *riscv_aplic_create(hwaddr addr, hwaddr size, + uint32_t hartid_base, uint32_t num_harts, uint32_t num_sources, + uint32_t iprio_bits, bool msimode, bool mmode, DeviceState *parent); + +#endif -- 2.25.1