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Subject: Re: [PATCH v21 01/29] LoongArch: KVM: Add kvm related header files
To:     Huacai Chen <chenhuacai@kernel.org>
Cc:     linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        Paolo Bonzini <pbonzini@redhat.com>,
        WANG Xuerui <kernel@xen0n.name>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        loongarch@lists.linux.dev, Jens Axboe <axboe@kernel.dk>,
        Mark Brown <broonie@kernel.org>,
        Alex Deucher <alexander.deucher@amd.com>,
        Oliver Upton <oliver.upton@linux.dev>, maobibo@loongson.cn,
        Xi Ruoyao <xry111@xry111.site>
References: <20230915014949.1222777-1-zhaotianrui@loongson.cn>
 <20230915014949.1222777-2-zhaotianrui@loongson.cn>
 <CAAhV-H6dC9bmoYsxCZ7OXzzBgEEybt6OauWBox3e7p4VKDLqkg@mail.gmail.com>
 <f0e8a0ab-280b-7d9b-b0c7-5d9480329701@loongson.cn>
 <CAAhV-H7wupCarC+9dn9Sps1ZhyoqsOJVzAPuaQM03N_TohbbKA@mail.gmail.com>
 <75531403-a08d-bd81-6847-34311e2c6b57@loongson.cn>
 <CAAhV-H7_E_eBr1G90RzJgMpECPxaaz4EOCxxcAdXgwy8s5XzKg@mail.gmail.com>
From:   zhaotianrui <zhaotianrui@loongson.cn>
Message-ID: <b1f9f3e1-ef6c-f379-2874-63b4e502bb90@loongson.cn>
Date:   Tue, 19 Sep 2023 10:56:47 +0800
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在 2023/9/18 下午2:35, Huacai Chen 写道:
> On Mon, Sep 18, 2023 at 2:28 PM zhaotianrui <zhaotianrui@loongson.cn> wrote:
>>
>> 在 2023/9/18 上午9:36, Huacai Chen 写道:
>>> Hi, Tianrui,
>>>
>>> On Mon, Sep 18, 2023 at 9:32 AM zhaotianrui <zhaotianrui@loongson.cn> wrote:
>>>> 在 2023/9/16 下午4:48, Huacai Chen 写道:
>>>>> Hi, Tianrui,
>>>>>
>>>>> On Fri, Sep 15, 2023 at 9:50 AM Tianrui Zhao <zhaotianrui@loongson.cn> wrote:
>>>>>> Add LoongArch KVM related header files, including kvm.h,
>>>>>> kvm_host.h, kvm_types.h. All of those are about LoongArch
>>>>>> virtualization features and kvm interfaces.
>>>>>>
>>>>>> Reviewed-by: Bibo Mao <maobibo@loongson.cn>
>>>>>> Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
>>>>>> ---
>>>>>>     arch/loongarch/include/asm/kvm_host.h  | 245 +++++++++++++++++++++++++
>>>>>>     arch/loongarch/include/asm/kvm_types.h |  11 ++
>>>>>>     arch/loongarch/include/uapi/asm/kvm.h  | 108 +++++++++++
>>>>>>     include/uapi/linux/kvm.h               |   9 +
>>>>>>     4 files changed, 373 insertions(+)
>>>>>>     create mode 100644 arch/loongarch/include/asm/kvm_host.h
>>>>>>     create mode 100644 arch/loongarch/include/asm/kvm_types.h
>>>>>>     create mode 100644 arch/loongarch/include/uapi/asm/kvm.h
>>>>>>
>>>>>> diff --git a/arch/loongarch/include/asm/kvm_host.h b/arch/loongarch/include/asm/kvm_host.h
>>>>>> new file mode 100644
>>>>>> index 0000000000..00e0c1876b
>>>>>> --- /dev/null
>>>>>> +++ b/arch/loongarch/include/asm/kvm_host.h
>>>>>> @@ -0,0 +1,245 @@
>>>>>> +/* SPDX-License-Identifier: GPL-2.0 */
>>>>>> +/*
>>>>>> + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
>>>>>> + */
>>>>>> +
>>>>>> +#ifndef __ASM_LOONGARCH_KVM_HOST_H__
>>>>>> +#define __ASM_LOONGARCH_KVM_HOST_H__
>>>>>> +
>>>>>> +#include <linux/cpumask.h>
>>>>>> +#include <linux/mutex.h>
>>>>>> +#include <linux/hrtimer.h>
>>>>>> +#include <linux/interrupt.h>
>>>>>> +#include <linux/types.h>
>>>>>> +#include <linux/kvm.h>
>>>>>> +#include <linux/kvm_types.h>
>>>>>> +#include <linux/threads.h>
>>>>>> +#include <linux/spinlock.h>
>>>>>> +
>>>>>> +#include <asm/inst.h>
>>>>>> +#include <asm/kvm_mmu.h>
>>>>>> +#include <asm/loongarch.h>
>>>>>> +
>>>>>> +/* Loongarch KVM register ids */
>>>>>> +#define KVM_GET_IOC_CSRIDX(id)         ((id & KVM_CSR_IDX_MASK) >> LOONGARCH_REG_SHIFT)
>>>>>> +#define KVM_GET_IOC_CPUCFG_IDX(id)     ((id & KVM_CPUCFG_IDX_MASK) >> LOONGARCH_REG_SHIFT)
>>>>>> +
>>>>>> +#define KVM_MAX_VCPUS                  256
>>>>>> +#define KVM_MAX_CPUCFG_REGS            21
>>>>>> +/* memory slots that does not exposed to userspace */
>>>>>> +#define KVM_PRIVATE_MEM_SLOTS          0
>>>>>> +
>>>>>> +#define KVM_HALT_POLL_NS_DEFAULT       500000
>>>>>> +
>>>>>> +struct kvm_vm_stat {
>>>>>> +       struct kvm_vm_stat_generic generic;
>>>>>> +       u64 pages;
>>>>>> +       u64 hugepages;
>>>>>> +};
>>>>>> +
>>>>>> +struct kvm_vcpu_stat {
>>>>>> +       struct kvm_vcpu_stat_generic generic;
>>>>>> +       u64 idle_exits;
>>>>>> +       u64 signal_exits;
>>>>>> +       u64 int_exits;
>>>>>> +       u64 cpucfg_exits;
>>>>>> +};
>>>>>> +
>>>>>> +struct kvm_arch_memory_slot {
>>>>>> +};
>>>>>> +
>>>>>> +struct kvm_context {
>>>>>> +       unsigned long vpid_cache;
>>>>>> +       struct kvm_vcpu *last_vcpu;
>>>>>> +};
>>>>>> +
>>>>>> +struct kvm_world_switch {
>>>>>> +       int (*guest_eentry)(void);
>>>>>> +       int (*enter_guest)(struct kvm_run *run, struct kvm_vcpu *vcpu);
>>>>>> +       unsigned long page_order;
>>>>>> +};
>>>>>> +
>>>>>> +#define MAX_PGTABLE_LEVELS     4
>>>>>> +struct kvm_arch {
>>>>>> +       /* Guest physical mm */
>>>>>> +       kvm_pte_t *pgd;
>>>>>> +       unsigned long gpa_size;
>>>>>> +       unsigned long invalid_ptes[MAX_PGTABLE_LEVELS];
>>>>>> +       unsigned int  pte_shifts[MAX_PGTABLE_LEVELS];
>>>>>> +       unsigned int  root_level;
>>>>>> +
>>>>>> +       s64 time_offset;
>>>>>> +       struct kvm_context __percpu *vmcs;
>>>>>> +};
>>>>>> +
>>>>>> +#define CSR_MAX_NUMS           0x800
>>>>>> +
>>>>>> +struct loongarch_csrs {
>>>>>> +       unsigned long csrs[CSR_MAX_NUMS];
>>>>>> +};
>>>>>> +
>>>>>> +/* Resume Flags */
>>>>>> +#define RESUME_HOST            0
>>>>>> +#define RESUME_GUEST           1
>>>>>> +
>>>>>> +enum emulation_result {
>>>>>> +       EMULATE_DONE,           /* no further processing */
>>>>>> +       EMULATE_DO_MMIO,        /* kvm_run filled with MMIO request */
>>>>>> +       EMULATE_FAIL,           /* can't emulate this instruction */
>>>>>> +       EMULATE_EXCEPT,         /* A guest exception has been generated */
>>>>>> +       EMULATE_DO_IOCSR,       /* handle IOCSR request */
>>>>>> +};
>>>>>> +
>>>>>> +#define KVM_LARCH_FPU          (0x1 << 0)
>>>>>> +#define KVM_LARCH_CSR          (0x1 << 1)
>>>>>> +#define KVM_LARCH_HWCSR_USABLE (0x1 << 2)
>>>>>> +
>>>>>> +struct kvm_vcpu_arch {
>>>>>> +       /*
>>>>>> +        * Switch pointer-to-function type to unsigned long
>>>>>> +        * for loading the value into register directly.
>>>>>> +        */
>>>>>> +       unsigned long host_eentry;
>>>>>> +       unsigned long guest_eentry;
>>>>>> +
>>>>>> +       /* Pointers stored here for easy accessing from assembly code */
>>>>>> +       int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
>>>>>> +
>>>>>> +       /* Host registers preserved across guest mode execution */
>>>>>> +       unsigned long host_sp;
>>>>>> +       unsigned long host_tp;
>>>>>> +       unsigned long host_pgd;
>>>>>> +
>>>>>> +       /* Host CSRs are used when handling exits from guest */
>>>>>> +       unsigned long badi;
>>>>>> +       unsigned long badv;
>>>>>> +       unsigned long host_ecfg;
>>>>>> +       unsigned long host_estat;
>>>>>> +       unsigned long host_percpu;
>>>>>> +
>>>>>> +       /* GPRs */
>>>>>> +       unsigned long gprs[32];
>>>>>> +       unsigned long pc;
>>>>>> +
>>>>>> +       /* Which auxiliary state is loaded (KVM_LARCH_*) */
>>>>>> +       unsigned int aux_inuse;
>>>>>> +       /* FPU state */
>>>>>> +       struct loongarch_fpu fpu FPU_ALIGN;
>>>>>> +
>>>>>> +       /* CSR state */
>>>>>> +       struct loongarch_csrs *csr;
>>>>>> +
>>>>>> +       /* GPR used as IO source/target */
>>>>>> +       u32 io_gpr;
>>>>>> +
>>>>>> +       struct hrtimer swtimer;
>>>>>> +       /* KVM register to control count timer */
>>>>>> +       u32 count_ctl;
>>>>>> +
>>>>>> +       /* Bitmask of intr that are pending */
>>>>>> +       unsigned long irq_pending;
>>>>>> +       /* Bitmask of pending intr to be cleared */
>>>>>> +       unsigned long irq_clear;
>>>>>> +
>>>>>> +       /* Bitmask of exceptions that are pending */
>>>>>> +       unsigned long exception_pending;
>>>>>> +       unsigned int  subcode;
>>>>>> +
>>>>>> +       /* Cache for pages needed inside spinlock regions */
>>>>>> +       struct kvm_mmu_memory_cache mmu_page_cache;
>>>>>> +
>>>>>> +       /* vcpu's vpid */
>>>>>> +       u64 vpid;
>>>>>> +
>>>>>> +       /* Frequency of stable timer in Hz */
>>>>>> +       u64 timer_mhz;
>>>>>> +       ktime_t expire;
>>>>>> +
>>>>>> +       u64 core_ext_ioisr[4];
>>>>>> +
>>>>>> +       /* Last CPU the vCPU state was loaded on */
>>>>>> +       int last_sched_cpu;
>>>>>> +       /* mp state */
>>>>>> +       struct kvm_mp_state mp_state;
>>>>>> +       /* cpucfg */
>>>>>> +       u32 cpucfg[KVM_MAX_CPUCFG_REGS];
>>>>>> +};
>>>>>> +
>>>>>> +static inline unsigned long readl_sw_gcsr(struct loongarch_csrs *csr, int reg)
>>>>>> +{
>>>>>> +       return csr->csrs[reg];
>>>>>> +}
>>>>>> +
>>>>>> +static inline void writel_sw_gcsr(struct loongarch_csrs *csr, int reg, unsigned long val)
>>>>>> +{
>>>>>> +       csr->csrs[reg] = val;
>>>>>> +}
>>>>>> +
>>>>>> +/* Helpers */
>>>>>> +static inline bool kvm_guest_has_fpu(struct kvm_vcpu_arch *arch)
>>>>>> +{
>>>>>> +       return cpu_has_fpu;
>>>>>> +}
>>>>>> +
>>>>>> +void kvm_init_fault(void);
>>>>>> +
>>>>>> +/* Debug: dump vcpu state */
>>>>>> +int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu);
>>>>>> +
>>>>>> +/* MMU handling */
>>>>>> +int kvm_handle_mm_fault(struct kvm_vcpu *vcpu, unsigned long badv, bool write);
>>>>>> +void kvm_flush_tlb_all(void);
>>>>>> +
>>>>>> +#define KVM_ARCH_WANT_MMU_NOTIFIER
>>>>>> +int kvm_unmap_hva_range(struct kvm *kvm,
>>>>>> +                       unsigned long start, unsigned long end, bool blockable);
>>>>>> +void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
>>>>>> +int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
>>>>>> +int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
>>>>>> +
>>>>>> +static inline void update_pc(struct kvm_vcpu_arch *arch)
>>>>>> +{
>>>>>> +       arch->pc += 4;
>>>>>> +}
>>>>>> +
>>>>>> +/**
>>>>>> + * kvm_is_ifetch_fault() - Find whether a TLBL exception is due to ifetch fault.
>>>>>> + * @vcpu:      Virtual CPU.
>>>>>> + *
>>>>>> + * Returns:    Whether the TLBL exception was likely due to an instruction
>>>>>> + *             fetch fault rather than a data load fault.
>>>>>> + */
>>>>>> +static inline bool kvm_is_ifetch_fault(struct kvm_vcpu_arch *arch)
>>>>>> +{
>>>>>> +       return arch->pc == arch->badv;
>>>>>> +}
>>>>>> +
>>>>>> +/* Misc */
>>>>>> +static inline void kvm_arch_hardware_unsetup(void) {}
>>>>>> +static inline void kvm_arch_sync_events(struct kvm *kvm) {}
>>>>>> +static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
>>>>>> +static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
>>>>>> +static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
>>>>>> +static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
>>>>>> +static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
>>>>>> +static inline void kvm_arch_free_memslot(struct kvm *kvm,
>>>>>> +                                  struct kvm_memory_slot *slot) {}
>>>>>> +void kvm_check_vpid(struct kvm_vcpu *vcpu);
>>>>>> +enum hrtimer_restart kvm_swtimer_wakeup(struct hrtimer *timer);
>>>>>> +int kvm_flush_tlb_gpa(struct kvm_vcpu *vcpu, unsigned long gpa);
>>>>>> +void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
>>>>>> +                                       const struct kvm_memory_slot *memslot);
>>>>>> +void kvm_init_vmcs(struct kvm *kvm);
>>>>>> +void kvm_vector_entry(void);
>>>>>> +int  kvm_enter_guest(struct kvm_run *run, struct kvm_vcpu *vcpu);
>>>>>> +extern const unsigned long kvm_vector_size;
>>>>>> +extern const unsigned long kvm_enter_guest_size;
>>>>>> +extern unsigned long vpid_mask;
>>>>>> +extern struct kvm_world_switch *kvm_loongarch_ops;
>>>>>> +
>>>>>> +#define SW_GCSR                (1 << 0)
>>>>>> +#define HW_GCSR                (1 << 1)
>>>>>> +#define INVALID_GCSR   (1 << 2)
>>>>>> +int get_gcsr_flag(int csr);
>>>>>> +extern void set_hw_gcsr(int csr_id, unsigned long val);
>>>>>> +#endif /* __ASM_LOONGARCH_KVM_HOST_H__ */
>>>>>> diff --git a/arch/loongarch/include/asm/kvm_types.h b/arch/loongarch/include/asm/kvm_types.h
>>>>>> new file mode 100644
>>>>>> index 0000000000..2fe1d4bdff
>>>>>> --- /dev/null
>>>>>> +++ b/arch/loongarch/include/asm/kvm_types.h
>>>>>> @@ -0,0 +1,11 @@
>>>>>> +/* SPDX-License-Identifier: GPL-2.0 */
>>>>>> +/*
>>>>>> + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
>>>>>> + */
>>>>>> +
>>>>>> +#ifndef _ASM_LOONGARCH_KVM_TYPES_H
>>>>>> +#define _ASM_LOONGARCH_KVM_TYPES_H
>>>>>> +
>>>>>> +#define KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE      40
>>>>>> +
>>>>>> +#endif /* _ASM_LOONGARCH_KVM_TYPES_H */
>>>>>> diff --git a/arch/loongarch/include/uapi/asm/kvm.h b/arch/loongarch/include/uapi/asm/kvm.h
>>>>>> new file mode 100644
>>>>>> index 0000000000..fafda487d6
>>>>>> --- /dev/null
>>>>>> +++ b/arch/loongarch/include/uapi/asm/kvm.h
>>>>>> @@ -0,0 +1,108 @@
>>>>>> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
>>>>>> +/*
>>>>>> + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
>>>>>> + */
>>>>>> +
>>>>>> +#ifndef __UAPI_ASM_LOONGARCH_KVM_H
>>>>>> +#define __UAPI_ASM_LOONGARCH_KVM_H
>>>>>> +
>>>>>> +#include <linux/types.h>
>>>>>> +
>>>>>> +/*
>>>>>> + * KVM Loongarch specific structures and definitions.
>>>>>> + *
>>>>>> + * Some parts derived from the x86 version of this file.
>>>>>> + */
>>>>>> +
>>>>>> +#define __KVM_HAVE_READONLY_MEM
>>>>>> +
>>>>>> +#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
>>>>>> +#define KVM_DIRTY_LOG_PAGE_OFFSET      64
>>>>>> +
>>>>>> +/*
>>>>>> + * for KVM_GET_REGS and KVM_SET_REGS
>>>>>> + */
>>>>>> +struct kvm_regs {
>>>>>> +       /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
>>>>>> +       __u64 gpr[32];
>>>>>> +       __u64 pc;
>>>>>> +};
>>>>>> +
>>>>>> +/*
>>>>>> + * for KVM_GET_FPU and KVM_SET_FPU
>>>>>> + */
>>>>>> +struct kvm_fpu {
>>>>>> +       __u32 fcsr;
>>>>>> +       __u64 fcc;    /* 8x8 */
>>>>>> +       struct kvm_fpureg {
>>>>>> +               __u64 val64[4];
>>>>>> +       } fpr[32];
>>>>>> +};
>>>>>> +
>>>>>> +/*
>>>>>> + * For LoongArch, we use KVM_SET_ONE_REG and KVM_GET_ONE_REG to access various
>>>>>> + * registers.  The id field is broken down as follows:
>>>>>> + *
>>>>>> + *  bits[63..52] - As per linux/kvm.h
>>>>>> + *  bits[51..32] - Must be zero.
>>>>>> + *  bits[31..16] - Register set.
>>>>>> + *
>>>>>> + * Register set = 0: GP registers from kvm_regs (see definitions below).
>>>>>> + *
>>>>>> + * Register set = 1: CSR registers.
>>>>>> + *
>>>>>> + * Register set = 2: KVM specific registers (see definitions below).
>>>>>> + *
>>>>>> + * Register set = 3: FPU / SIMD registers (see definitions below).
>>>>>> + *
>>>>>> + * Other sets registers may be added in the future.  Each set would
>>>>>> + * have its own identifier in bits[31..16].
>>>>>> + */
>>>>>> +
>>>>>> +#define KVM_REG_LOONGARCH_GPR          (KVM_REG_LOONGARCH | 0x00000ULL)
>>>>>> +#define KVM_REG_LOONGARCH_CSR          (KVM_REG_LOONGARCH | 0x10000ULL)
>>>>>> +#define KVM_REG_LOONGARCH_KVM          (KVM_REG_LOONGARCH | 0x20000ULL)
>>>>>> +#define KVM_REG_LOONGARCH_FPU          (KVM_REG_LOONGARCH | 0x30000ULL)
>>>>> How about rename to KVM_REG_LOONGARCH_FPSIMD？
>>>>>
>>>>> Huacai
>>>> It will broke uapi used by user space software, it may cause
>>>> incompatible issue, so I think it is better to keep the original name.
>>> In your comments above it is not only FPU but FPU&SIMD, and this code
>>> hasn't been upstream yet, how to break UAPI?
>> We want to apply this patch series to our other project when it is
>> upstream, so we need update the previous codes and it may break the
>> uapi. What do you think of it?
> Generally, the kernel is the first one to be upstream, so kernel can
> do anything reasonable, other projects should align to kernel when
> they want to get upstream.
>
> Huacai
Thanks for your advice, I understand your meaning above and I think it 
is better to rename to KVM_REG_LOONGARCH_FPSIMD.

Thanks
Tianrui Zhao
>
>> Thanks
>> Tianrui Zhao
>>> Huacai
>>>
>>>> Thanks
>>>> Tianrui Zhao
>>>>>> +#define KVM_REG_LOONGARCH_CPUCFG       (KVM_REG_LOONGARCH | 0x40000ULL)
>>>>>> +#define KVM_REG_LOONGARCH_MASK         (KVM_REG_LOONGARCH | 0x70000ULL)
>>>>>> +#define KVM_CSR_IDX_MASK               0x7fff
>>>>>> +#define KVM_CPUCFG_IDX_MASK            0x7fff
>>>>>> +
>>>>>> +/*
>>>>>> + * KVM_REG_LOONGARCH_KVM - KVM specific control registers.
>>>>>> + */
>>>>>> +
>>>>>> +#define KVM_REG_LOONGARCH_COUNTER      (KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 3)
>>>>>> +#define KVM_REG_LOONGARCH_VCPU_RESET   (KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 4)
>>>>>> +
>>>>>> +#define LOONGARCH_REG_SHIFT            3
>>>>>> +#define LOONGARCH_REG_64(TYPE, REG)    (TYPE | KVM_REG_SIZE_U64 | (REG << LOONGARCH_REG_SHIFT))
>>>>>> +#define KVM_IOC_CSRID(REG)             LOONGARCH_REG_64(KVM_REG_LOONGARCH_CSR, REG)
>>>>>> +#define KVM_IOC_CPUCFG(REG)            LOONGARCH_REG_64(KVM_REG_LOONGARCH_CPUCFG, REG)
>>>>>> +
>>>>>> +struct kvm_debug_exit_arch {
>>>>>> +};
>>>>>> +
>>>>>> +/* for KVM_SET_GUEST_DEBUG */
>>>>>> +struct kvm_guest_debug_arch {
>>>>>> +};
>>>>>> +
>>>>>> +/* definition of registers in kvm_run */
>>>>>> +struct kvm_sync_regs {
>>>>>> +};
>>>>>> +
>>>>>> +/* dummy definition */
>>>>>> +struct kvm_sregs {
>>>>>> +};
>>>>>> +
>>>>>> +struct kvm_iocsr_entry {
>>>>>> +       __u32 addr;
>>>>>> +       __u32 pad;
>>>>>> +       __u64 data;
>>>>>> +};
>>>>>> +
>>>>>> +#define KVM_NR_IRQCHIPS                1
>>>>>> +#define KVM_IRQCHIP_NUM_PINS   64
>>>>>> +#define KVM_MAX_CORES          256
>>>>>> +
>>>>>> +#endif /* __UAPI_ASM_LOONGARCH_KVM_H */
>>>>>> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
>>>>>> index 13065dd961..863f84619a 100644
>>>>>> --- a/include/uapi/linux/kvm.h
>>>>>> +++ b/include/uapi/linux/kvm.h
>>>>>> @@ -264,6 +264,7 @@ struct kvm_xen_exit {
>>>>>>     #define KVM_EXIT_RISCV_SBI        35
>>>>>>     #define KVM_EXIT_RISCV_CSR        36
>>>>>>     #define KVM_EXIT_NOTIFY           37
>>>>>> +#define KVM_EXIT_LOONGARCH_IOCSR  38
>>>>>>
>>>>>>     /* For KVM_EXIT_INTERNAL_ERROR */
>>>>>>     /* Emulate instruction failed. */
>>>>>> @@ -336,6 +337,13 @@ struct kvm_run {
>>>>>>                            __u32 len;
>>>>>>                            __u8  is_write;
>>>>>>                    } mmio;
>>>>>> +               /* KVM_EXIT_LOONGARCH_IOCSR */
>>>>>> +               struct {
>>>>>> +                       __u64 phys_addr;
>>>>>> +                       __u8  data[8];
>>>>>> +                       __u32 len;
>>>>>> +                       __u8  is_write;
>>>>>> +               } iocsr_io;
>>>>>>                    /* KVM_EXIT_HYPERCALL */
>>>>>>                    struct {
>>>>>>                            __u64 nr;
>>>>>> @@ -1362,6 +1370,7 @@ struct kvm_dirty_tlb {
>>>>>>     #define KVM_REG_ARM64          0x6000000000000000ULL
>>>>>>     #define KVM_REG_MIPS           0x7000000000000000ULL
>>>>>>     #define KVM_REG_RISCV          0x8000000000000000ULL
>>>>>> +#define KVM_REG_LOONGARCH      0x9000000000000000ULL
>>>>>>
>>>>>>     #define KVM_REG_SIZE_SHIFT     52
>>>>>>     #define KVM_REG_SIZE_MASK      0x00f0000000000000ULL
>>>>>> --
>>>>>> 2.39.1
>>>>>>