MIPS: Add functions for hypervisor call

Introduce kvm_hypercall[0-3]. Define three new hypercalls for MIPS: GET_CLOCK_FREQ, EXIT_VM, and CONSOLE_OUTPUT. [andreas.herrmann: * Properly define hypercalls and HC numbers for MIPS in kvm_para.h header files]

David Daney committed 12 years ago

Commit 90dfdc71 parent cd3f5383 files · +117 −1Browse files

Unified · Split

3 files

arch/mips/include/asm/kvm_para.h +109 −0
arch/mips/include/uapi/asm/kvm_para.h +5 −1
include/uapi/linux/kvm_para.h +3 −0

arch/mips/include/asm/kvm_para.h+109−0

@@ -0,0 +1,109 @@
	1	#ifndef _ASM_MIPS_KVM_PARA_H
	2	#define _ASM_MIPS_KVM_PARA_H
	3
	4	#include <uapi/asm/kvm_para.h>
	5
	6	#define KVM_HYPERCALL ".word 0x42000028"
	7
	8	/*
	9	* Hypercalls for KVM.
	10	*
	11	* Hypercall number is passed in v0.
	12	* Return value will be placed in v0.
	13	* Up to 3 arguments are passed in a0, a1, and a2.
	14	*/
	15	static inline unsigned long kvm_hypercall0(unsigned long num)
	16	{
	17	register unsigned long n asm("v0");
	18	register unsigned long r asm("v0");
	19
	20	n = num;
	21	__asm__ __volatile__(
	22	KVM_HYPERCALL
	23	: "=r" (r) : "r" (n) : "memory"
	24	);
	25
	26	return r;
	27	}
	28
	29	static inline unsigned long kvm_hypercall1(unsigned long num,
	30	unsigned long arg0)
	31	{
	32	register unsigned long n asm("v0");
	33	register unsigned long r asm("v0");
	34	register unsigned long a0 asm("a0");
	35
	36	n = num;
	37	a0 = arg0;
	38	__asm__ __volatile__(
	39	KVM_HYPERCALL
	40	: "=r" (r) : "r" (n), "r" (a0) : "memory"
	41	);
	42
	43	return r;
	44	}
	45
	46	static inline unsigned long kvm_hypercall2(unsigned long num,
	47	unsigned long arg0, unsigned long arg1)
	48	{
	49	register unsigned long n asm("v0");
	50	register unsigned long r asm("v0");
	51	register unsigned long a0 asm("a0");
	52	register unsigned long a1 asm("a1");
	53
	54	n = num;
	55	a0 = arg0;
	56	a1 = arg1;
	57	__asm__ __volatile__(
	58	KVM_HYPERCALL
	59	: "=r" (r) : "r" (n), "r" (a0), "r" (a1) : "memory"
	60	);
	61
	62	return r;
	63	}
	64
	65	static inline unsigned long kvm_hypercall3(unsigned long num,
	66	unsigned long arg0, unsigned long arg1, unsigned long arg2)
	67	{
	68	register unsigned long n asm("v0");
	69	register unsigned long r asm("v0");
	70	register unsigned long a0 asm("a0");
	71	register unsigned long a1 asm("a1");
	72	register unsigned long a2 asm("a2");
	73
	74	n = num;
	75	a0 = arg0;
	76	a1 = arg1;
	77	a2 = arg2;
	78	__asm__ __volatile__(
	79	KVM_HYPERCALL
	80	: "=r" (r) : "r" (n), "r" (a0), "r" (a1), "r" (a2) : "memory"
	81	);
	82
	83	return r;
	84	}
	85
	86	static inline bool kvm_check_and_clear_guest_paused(void)
	87	{
	88	return false;
	89	}
	90
	91	static inline unsigned int kvm_arch_para_features(void)
	92	{
	93	return 0;
	94	}
	95
	96	#ifdef CONFIG_MIPS_PARAVIRT
	97	static inline bool kvm_para_available(void)
	98	{
	99	return true;
	100	}
	101	#else
	102	static inline bool kvm_para_available(void)
	103	{
	104	return false;
	105	}
	106	#endif
	107
	108
	109	#endif /* _ASM_MIPS_KVM_PARA_H */

arch/mips/include/uapi/asm/kvm_para.h+5−1

@@ -1 +1,5 @@
1	#include <asm-generic/kvm_para.h>	1	#ifndef _UAPI_ASM_MIPS_KVM_PARA_H
		2	#define _UAPI_ASM_MIPS_KVM_PARA_H
		3
		4
		5	#endif /* _UAPI_ASM_MIPS_KVM_PARA_H */

include/uapi/linux/kvm_para.h+3−0

 #define KVM_HC_FEATURES			3
 #define KVM_HC_PPC_MAP_MAGIC_PAGE	4
 #define KVM_HC_KICK_CPU			5
+#define KVM_HC_MIPS_GET_CLOCK_FREQ	6
+#define KVM_HC_MIPS_EXIT_VM		7
+#define KVM_HC_MIPS_CONSOLE_OUTPUT	8
 /*
  * hypercalls use architecture specific