[V4,08/11] LoongArch: KVM: Add PCHPIC device support

Message ID	20241108033852.2727684-2-lixianglai@loongson.cn (mailing list archive)
State	New
Headers	show Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id EF6C819E83C; Fri, 8 Nov 2024 03:57:20 +0000 (UTC) From: Xianglai Li <lixianglai@loongson.cn> To: linux-kernel@vger.kernel.org Cc: Tianrui Zhao <zhaotianrui@loongson.cn>, Huacai Chen <chenhuacai@loongson.cn>, Bibo Mao <maobibo@loongson.cn>, Huacai Chen <chenhuacai@kernel.org>, kvm@vger.kernel.org, loongarch@lists.linux.dev, Paolo Bonzini <pbonzini@redhat.com>, WANG Xuerui <kernel@xen0n.name>, Xianglai li <lixianglai@loongson.cn> Subject: [PATCH V4 08/11] LoongArch: KVM: Add PCHPIC device support Date: Fri, 8 Nov 2024 11:38:49 +0800 Message-Id: <20241108033852.2727684-2-lixianglai@loongson.cn> In-Reply-To: <20241108033852.2727684-1-lixianglai@loongson.cn> References: <20241108033437.2727574-1-lixianglai@loongson.cn> <20241108033852.2727684-1-lixianglai@loongson.cn> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	Added Interrupt controller emulation for loongarch kvm \| expand [V4,00/11] Added Interrupt controller emulation for loongarch kvm [V4,01/11] LoongArch: KVM: Add iocsr and mmio bus simulation in kernel [V4,02/11] LoongArch: KVM: Add IPI device support [V4,03/11] LoongArch: KVM: Add IPI read and write function [V4,04/11] LoongArch: KVM: Add IPI user mode read and write function [V4,05/11] LoongArch: KVM: Add EIOINTC device support [V4,06/11] LoongArch: KVM: Add EIOINTC read and write functions [V4,07/11] LoongArch: KVM: Add EIOINTC user mode read and write functions [V4,08/11] LoongArch: KVM: Add PCHPIC device support [V4,09/11] LoongArch: KVM: Add PCHPIC read and write functions [V4,10/11] LoongArch: KVM: Add PCHPIC user mode read and write functions [V4,11/11] LoongArch: KVM: Add irqfd support

diff --git a/arch/loongarch/include/asm/kvm_host.h b/arch/loongarch/include/asm/kvm_host.h index a63c2bf6fae0..a6b82c8ab7bc 100644 --- a/arch/loongarch/include/asm/kvm_host.h +++ b/arch/loongarch/include/asm/kvm_host.h @@ -20,6 +20,7 @@ #include <asm/kvm_mmu.h> #include <asm/kvm_ipi.h> #include <asm/kvm_eiointc.h> +#include <asm/kvm_pch_pic.h> #include <asm/loongarch.h> /* Loongarch KVM register ids */ @@ -125,6 +126,7 @@ struct kvm_arch { struct kvm_context __percpu *vmcs; struct loongarch_ipi *ipi; struct loongarch_eiointc *eiointc; + struct loongarch_pch_pic *pch_pic; }; #define CSR_MAX_NUMS 0x800 diff --git a/arch/loongarch/include/asm/kvm_pch_pic.h b/arch/loongarch/include/asm/kvm_pch_pic.h new file mode 100644 index 000000000000..c320f66c2004 --- /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 <kvm/iodev.h> + +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: eiointc */ + uint8_t htmsi_vector[64]; /* irq route table for routing to eiointc */ + 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 bb50fc799c29..97b2adf08206 100644 --- a/arch/loongarch/kvm/Makefile +++ b/arch/loongarch/kvm/Makefile @@ -20,5 +20,6 @@ kvm-y += vcpu.o kvm-y += vm.o kvm-y += intc/ipi.o kvm-y += intc/eiointc.o +kvm-y += intc/pch_pic.o CFLAGS_exit.o += $(call cc-option,-Wno-override-init,) diff --git a/arch/loongarch/kvm/intc/pch_pic.c b/arch/loongarch/kvm/intc/pch_pic.c new file mode 100644 index 000000000000..eeebf04f458f --- /dev/null +++ b/arch/loongarch/kvm/intc/pch_pic.c @@ -0,0 +1,88 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2024 Loongson Technology Corporation Limited + */ + +#include <asm/kvm_eiointc.h> +#include <asm/kvm_pch_pic.h> +#include <asm/kvm_vcpu.h> +#include <linux/count_zeros.h> + +static int kvm_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_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_pch_pic_ops = { + .read = kvm_pch_pic_read, + .write = kvm_pch_pic_write, +}; + +static int kvm_pch_pic_get_attr(struct kvm_device *dev, + struct kvm_device_attr *attr) +{ + return 0; +} + +static int kvm_pch_pic_set_attr(struct kvm_device *dev, + struct kvm_device_attr *attr) +{ + return 0; +} + +static int kvm_pch_pic_create(struct kvm_device *dev, u32 type) +{ + struct loongarch_pch_pic *s; + struct kvm *kvm = dev->kvm; + + /* pch pic should not has been created */ + if (kvm->arch.pch_pic) + return -EINVAL; + + s = kzalloc(sizeof(struct loongarch_pch_pic), GFP_KERNEL); + if (!s) + return -ENOMEM; + + spin_lock_init(&s->lock); + s->kvm = kvm; + kvm->arch.pch_pic = s; + + return 0; +} + +static void kvm_pch_pic_destroy(struct kvm_device *dev) +{ + struct kvm *kvm; + struct loongarch_pch_pic *s; + + if (!dev || !dev->kvm || !dev->kvm->arch.pch_pic) + return; + + kvm = dev->kvm; + s = kvm->arch.pch_pic; + /* unregister pch pic device and free it's memory */ + kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &s->device); + kfree(s); +} + +static struct kvm_device_ops kvm_pch_pic_dev_ops = { + .name = "kvm-loongarch-pch-pic", + .create = kvm_pch_pic_create, + .destroy = kvm_pch_pic_destroy, + .set_attr = kvm_pch_pic_set_attr, + .get_attr = kvm_pch_pic_get_attr, +}; + +int kvm_loongarch_register_pch_pic_device(void) +{ + return kvm_register_device_ops(&kvm_pch_pic_dev_ops, KVM_DEV_TYPE_LOONGARCH_PCHPIC); +} diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c index c389ea8cc359..396fed2665a5 100644 --- a/arch/loongarch/kvm/main.c +++ b/arch/loongarch/kvm/main.c @@ -10,6 +10,7 @@ #include <asm/cpufeature.h> #include <asm/kvm_csr.h> #include <asm/kvm_eiointc.h> +#include <asm/kvm_pch_pic.h> #include "trace.h" unsigned long vpid_mask; @@ -376,6 +377,12 @@ static int kvm_loongarch_env_init(void) /* Register LoongArch EIOINTC interrupt controller interface. */ ret = kvm_loongarch_register_eiointc_device(); + if (ret) + return ret; + + /* Register LoongArch PCH-PIC interrupt controller interface. */ + ret = kvm_loongarch_register_pch_pic_device(); + return ret; } diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 0ec5c631d9e9..502ea63b5d2e 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1162,6 +1162,8 @@ enum kvm_device_type { #define KVM_DEV_TYPE_LOONGARCH_IPI KVM_DEV_TYPE_LOONGARCH_IPI KVM_DEV_TYPE_LOONGARCH_EIOINTC, #define KVM_DEV_TYPE_LOONGARCH_EIOINTC KVM_DEV_TYPE_LOONGARCH_EIOINTC + KVM_DEV_TYPE_LOONGARCH_PCHPIC, +#define KVM_DEV_TYPE_LOONGARCH_PCHPIC KVM_DEV_TYPE_LOONGARCH_PCHPIC KVM_DEV_TYPE_MAX,

[V4,08/11] LoongArch: KVM: Add PCHPIC device support

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