diff options
Diffstat (limited to 'arch/loongarch/include/asm/kvm_para.h')
| -rw-r--r-- | arch/loongarch/include/asm/kvm_para.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/kvm_para.h b/arch/loongarch/include/asm/kvm_para.h index 7f21de5c1632..012b85fcb2cb 100644 --- a/arch/loongarch/include/asm/kvm_para.h +++ b/arch/loongarch/include/asm/kvm_para.h @@ -3,12 +3,143 @@ #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_SERVICE HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_SERVICE) +#define KVM_HCALL_FUNC_IPI 1 + +/* * 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; |