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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_LOONGARCH_KVM_PARA_H
#define _ASM_LOONGARCH_KVM_PARA_H
/*
* Hypercall code field
*/
#define HYPERVISOR_KVM 1
#define HYPERVISOR_VENDOR_SHIFT 8
#define HYPERCALL_ENCODE(vendor, code) ((vendor << HYPERVISOR_VENDOR_SHIFT) + code)
#define KVM_HCALL_CODE_SERVICE 0
#define KVM_HCALL_CODE_SWDBG 1
#define KVM_HCALL_SERVICE HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_SERVICE)
#define KVM_HCALL_FUNC_IPI 1
#define KVM_HCALL_SWDBG HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_SWDBG)
/*
* LoongArch hypercall return code
*/
#define KVM_HCALL_SUCCESS 0
#define KVM_HCALL_INVALID_CODE -1UL
#define KVM_HCALL_INVALID_PARAMETER -2UL
/*
* Hypercall interface for KVM hypervisor
*
* a0: function identifier
* a1-a6: args
* Return value will be placed in a0.
* Up to 6 arguments are passed in a1, a2, a3, a4, a5, a6.
*/
static __always_inline long kvm_hypercall0(u64 fid)
{
register long ret asm("a0");
register unsigned long fun asm("a0") = fid;
__asm__ __volatile__(
"hvcl "__stringify(KVM_HCALL_SERVICE)
: "=r" (ret)
: "r" (fun)
: "memory"
);
return ret;
}
static __always_inline long kvm_hypercall1(u64 fid, unsigned long arg0)
{
register long ret asm("a0");
register unsigned long fun asm("a0") = fid;
register unsigned long a1 asm("a1") = arg0;
__asm__ __volatile__(
"hvcl "__stringify(KVM_HCALL_SERVICE)
: "=r" (ret)
: "r" (fun), "r" (a1)
: "memory"
);
return ret;
}
static __always_inline long kvm_hypercall2(u64 fid,
unsigned long arg0, unsigned long arg1)
{
register long ret asm("a0");
register unsigned long fun asm("a0") = fid;
register unsigned long a1 asm("a1") = arg0;
register unsigned long a2 asm("a2") = arg1;
__asm__ __volatile__(
"hvcl "__stringify(KVM_HCALL_SERVICE)
: "=r" (ret)
: "r" (fun), "r" (a1), "r" (a2)
: "memory"
);
return ret;
}
static __always_inline long kvm_hypercall3(u64 fid,
unsigned long arg0, unsigned long arg1, unsigned long arg2)
{
register long ret asm("a0");
register unsigned long fun asm("a0") = fid;
register unsigned long a1 asm("a1") = arg0;
register unsigned long a2 asm("a2") = arg1;
register unsigned long a3 asm("a3") = arg2;
__asm__ __volatile__(
"hvcl "__stringify(KVM_HCALL_SERVICE)
: "=r" (ret)
: "r" (fun), "r" (a1), "r" (a2), "r" (a3)
: "memory"
);
return ret;
}
static __always_inline long kvm_hypercall4(u64 fid,
unsigned long arg0, unsigned long arg1,
unsigned long arg2, unsigned long arg3)
{
register long ret asm("a0");
register unsigned long fun asm("a0") = fid;
register unsigned long a1 asm("a1") = arg0;
register unsigned long a2 asm("a2") = arg1;
register unsigned long a3 asm("a3") = arg2;
register unsigned long a4 asm("a4") = arg3;
__asm__ __volatile__(
"hvcl "__stringify(KVM_HCALL_SERVICE)
: "=r" (ret)
: "r"(fun), "r" (a1), "r" (a2), "r" (a3), "r" (a4)
: "memory"
);
return ret;
}
static __always_inline long kvm_hypercall5(u64 fid,
unsigned long arg0, unsigned long arg1,
unsigned long arg2, unsigned long arg3, unsigned long arg4)
{
register long ret asm("a0");
register unsigned long fun asm("a0") = fid;
register unsigned long a1 asm("a1") = arg0;
register unsigned long a2 asm("a2") = arg1;
register unsigned long a3 asm("a3") = arg2;
register unsigned long a4 asm("a4") = arg3;
register unsigned long a5 asm("a5") = arg4;
__asm__ __volatile__(
"hvcl "__stringify(KVM_HCALL_SERVICE)
: "=r" (ret)
: "r"(fun), "r" (a1), "r" (a2), "r" (a3), "r" (a4), "r" (a5)
: "memory"
);
return ret;
}
static inline unsigned int kvm_arch_para_features(void)
{
return 0;
}
static inline unsigned int kvm_arch_para_hints(void)
{
return 0;
}
static inline bool kvm_check_and_clear_guest_paused(void)
{
return false;
}
#endif /* _ASM_LOONGARCH_KVM_PARA_H */
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