From nobody Tue Feb 10 17:30:55 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 3157B74C02; Fri, 5 Jul 2024 02:56:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720148187; cv=none; b=PN3sPN53RILWaxm7+NqYVCCXpDNPgR9G2Ozn/HnRrK/G/pA9OR9cg+D6b79fQtClnGCOduiZyb3jPicPc1kUKRJg+F5S/zsORMaSkZPjbOa22bjUZ775xGShM6ZM60njkVIm52aDxdEuoyyGutPaMCHqlE5v/V81483evOo0RrE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720148187; c=relaxed/simple; bh=u2eC/JkX4Qspug7K9jMNz1IXyL8TialaNzGFwlMbGgs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=g207X5McIKPjuedW67Qbn7Y3sypviKjnuwXAUwFgKdpVYsO0BKj4OzNr13fqjU42a4V8trpuBNDoUwwmX2eqdBLHJgLBKWKnSxeIKRH3MA61suUNPIDJouzLJhFdkGaURPl5bcVRJjrtWUlnfh8IJ32ECpmxDQzsnZ1aMbfBJAM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8AxDOvXYIdmACUBAA--.3493S3; Fri, 05 Jul 2024 10:56:23 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8BxWcbRYIdm3tE7AA--.7292S10; Fri, 05 Jul 2024 10:56:23 +0800 (CST) From: Xianglai Li To: linux-kernel@vger.kernel.org Cc: Tianrui Zhao , Bibo Mao , Huacai Chen , kvm@vger.kernel.org, loongarch@lists.linux.dev, Min Zhou , Paolo Bonzini , WANG Xuerui , Xianglai li Subject: [PATCH 08/11] LoongArch: KVM: Add PCHPIC device support Date: Fri, 5 Jul 2024 10:38:51 +0800 Message-Id: <20240705023854.1005258-9-lixianglai@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20240705023854.1005258-1-lixianglai@loongson.cn> References: <20240705023854.1005258-1-lixianglai@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf8BxWcbRYIdm3tE7AA--.7292S10 X-CM-SenderInfo: 5ol0xt5qjotxo6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" Added device model for PCHPIC interrupt controller, implemented basic create destroy interface, and registered device model to kvm device table. Signed-off-by: Tianrui Zhao Signed-off-by: Xianglai Li --- Cc: Bibo Mao =20 Cc: Huacai Chen =20 Cc: kvm@vger.kernel.org=20 Cc: loongarch@lists.linux.dev=20 Cc: Min Zhou =20 Cc: Paolo Bonzini =20 Cc: Tianrui Zhao =20 Cc: WANG Xuerui =20 Cc: Xianglai li =20 arch/loongarch/include/asm/kvm_host.h | 2 + arch/loongarch/include/asm/kvm_pch_pic.h | 30 +++++++ arch/loongarch/kvm/Makefile | 1 + arch/loongarch/kvm/intc/pch_pic.c | 100 +++++++++++++++++++++++ arch/loongarch/kvm/main.c | 6 ++ include/uapi/linux/kvm.h | 2 + 6 files changed, 141 insertions(+) create mode 100644 arch/loongarch/include/asm/kvm_pch_pic.h create mode 100644 arch/loongarch/kvm/intc/pch_pic.c diff --git a/arch/loongarch/include/asm/kvm_host.h b/arch/loongarch/include= /asm/kvm_host.h index 5c2adebd16b2..31891f884cee 100644 --- a/arch/loongarch/include/asm/kvm_host.h +++ b/arch/loongarch/include/asm/kvm_host.h @@ -21,6 +21,7 @@ #include #include #include +#include =20 /* Loongarch KVM register ids */ #define KVM_GET_IOC_CSR_IDX(id) ((id & KVM_CSR_IDX_MASK) >> LOONGARCH_REG= _SHIFT) @@ -115,6 +116,7 @@ struct kvm_arch { struct kvm_context __percpu *vmcs; struct loongarch_ipi *ipi; struct loongarch_extioi *extioi; + struct loongarch_pch_pic *pch_pic; }; =20 #define CSR_MAX_NUMS 0x800 diff --git a/arch/loongarch/include/asm/kvm_pch_pic.h b/arch/loongarch/incl= ude/asm/kvm_pch_pic.h new file mode 100644 index 000000000000..5aef0e4e3863 --- /dev/null +++ b/arch/loongarch/include/asm/kvm_pch_pic.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2024 Loongson Technology Corporation Limited + */ + +#ifndef LOONGARCH_PCH_PIC_H +#define LOONGARCH_PCH_PIC_H + +#include + +struct loongarch_pch_pic { + spinlock_t lock; + struct kvm *kvm; + struct kvm_io_device device; + uint64_t mask; /* 1:disable irq, 0:enable irq */ + uint64_t htmsi_en; /* 1:msi */ + uint64_t edge; /* 1:edge triggered, 0:level triggered */ + uint64_t auto_ctrl0; /* only use default value 00b */ + uint64_t auto_ctrl1; /* only use default value 00b */ + uint64_t last_intirr; /* edge detection */ + uint64_t irr; /* interrupt request register */ + uint64_t isr; /* interrupt service register */ + uint64_t polarity; /* 0: high level trigger, 1: low level trigger */ + uint8_t route_entry[64]; /* default value 0, route to int0: extioi */ + uint8_t htmsi_vector[64]; /* irq route table for routing to extioi */ + uint64_t pch_pic_base; +}; + +int kvm_loongarch_register_pch_pic_device(void); +#endif /* LOONGARCH_PCH_PIC_H */ diff --git a/arch/loongarch/kvm/Makefile b/arch/loongarch/kvm/Makefile index a481952e3855..165ecb4d408f 100644 --- a/arch/loongarch/kvm/Makefile +++ b/arch/loongarch/kvm/Makefile @@ -20,5 +20,6 @@ kvm-y +=3D vcpu.o kvm-y +=3D vm.o kvm-y +=3D intc/ipi.o kvm-y +=3D intc/extioi.o +kvm-y +=3D intc/pch_pic.o =20 CFLAGS_exit.o +=3D $(call cc-option,-Wno-override-init,) diff --git a/arch/loongarch/kvm/intc/pch_pic.c b/arch/loongarch/kvm/intc/pc= h_pic.c new file mode 100644 index 000000000000..4097c00e8294 --- /dev/null +++ b/arch/loongarch/kvm/intc/pch_pic.c @@ -0,0 +1,100 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2024 Loongson Technology Corporation Limited + */ + +#include +#include +#include +#include + +static int kvm_loongarch_pch_pic_write(struct kvm_vcpu *vcpu, + struct kvm_io_device *dev, + gpa_t addr, int len, const void *val) +{ + return 0; +} + +static int kvm_loongarch_pch_pic_read(struct kvm_vcpu *vcpu, + struct kvm_io_device *dev, + gpa_t addr, int len, void *val) +{ + return 0; +} + +static const struct kvm_io_device_ops kvm_loongarch_pch_pic_ops =3D { + .read =3D kvm_loongarch_pch_pic_read, + .write =3D kvm_loongarch_pch_pic_write, +}; + +static int kvm_loongarch_pch_pic_get_attr(struct kvm_device *dev, + struct kvm_device_attr *attr) +{ + return 0; +} + +static int kvm_loongarch_pch_pic_set_attr(struct kvm_device *dev, + struct kvm_device_attr *attr) +{ + return 0; +} + +static void kvm_loongarch_pch_pic_destroy(struct kvm_device *dev) +{ + struct kvm *kvm; + struct loongarch_pch_pic *s; + struct kvm_io_device *device; + + if (!dev) + return; + + kvm =3D dev->kvm; + if (!kvm) + return; + + s =3D kvm->arch.pch_pic; + if (!s) + return; + + device =3D &s->device; + /* unregister pch pic device and free it's memory */ + kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, device); + kfree(s); +} + +static int kvm_loongarch_pch_pic_create(struct kvm_device *dev, u32 type) +{ + struct loongarch_pch_pic *s; + struct kvm *kvm =3D dev->kvm; + + /* pch pic should not has been created */ + if (kvm->arch.pch_pic) + return -EINVAL; + + s =3D kzalloc(sizeof(struct loongarch_pch_pic), GFP_KERNEL); + if (!s) + return -ENOMEM; + + spin_lock_init(&s->lock); + s->kvm =3D kvm; + + + kvm->arch.pch_pic =3D s; + + kvm_info("create pch pic device successfully\n"); + return 0; +} + +static struct kvm_device_ops kvm_loongarch_pch_pic_dev_ops =3D { + .name =3D "kvm-loongarch-pch-pic", + .create =3D kvm_loongarch_pch_pic_create, + .destroy =3D kvm_loongarch_pch_pic_destroy, + .set_attr =3D kvm_loongarch_pch_pic_set_attr, + .get_attr =3D kvm_loongarch_pch_pic_get_attr, +}; + +int kvm_loongarch_register_pch_pic_device(void) +{ + return kvm_register_device_ops(&kvm_loongarch_pch_pic_dev_ops, + KVM_DEV_TYPE_LA_IOAPIC); +} diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c index b5da4341006a..285bd4126e54 100644 --- a/arch/loongarch/kvm/main.c +++ b/arch/loongarch/kvm/main.c @@ -10,6 +10,7 @@ #include #include #include +#include #include "trace.h" =20 unsigned long vpid_mask; @@ -375,6 +376,11 @@ static int kvm_loongarch_env_init(void) =20 /* Register loongarch extioi interrupt controller interface. */ ret =3D kvm_loongarch_register_extioi_device(); + if (ret) + return ret; + + /* Register loongarch pch pic interrupt controller interface. */ + ret =3D kvm_loongarch_register_pch_pic_device(); =20 return ret; } diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 607895ea450f..35560522a252 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1142,6 +1142,8 @@ enum kvm_device_type { #define KVM_DEV_TYPE_ARM_PV_TIME KVM_DEV_TYPE_ARM_PV_TIME KVM_DEV_TYPE_RISCV_AIA, #define KVM_DEV_TYPE_RISCV_AIA KVM_DEV_TYPE_RISCV_AIA + KVM_DEV_TYPE_LA_IOAPIC, +#define KVM_DEV_TYPE_LA_IOAPIC KVM_DEV_TYPE_LA_IOAPIC KVM_DEV_TYPE_LA_IPI, #define KVM_DEV_TYPE_LA_IPI KVM_DEV_TYPE_LA_IPI KVM_DEV_TYPE_LA_EXTIOI, --=20 2.39.1