Commit 90dfdc7c authored by David Daney's avatar David Daney Committed by Ralf Baechle

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]
Signed-off-by: default avatarDavid Daney <david.daney@cavium.com>
Signed-off-by: default avatarAndreas Herrmann <andreas.herrmann@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Cc: James Hogan <james.hogan@imgtec.com>
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7005/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent cd3f5389
#ifndef _ASM_MIPS_KVM_PARA_H
#define _ASM_MIPS_KVM_PARA_H
#include <uapi/asm/kvm_para.h>
#define KVM_HYPERCALL ".word 0x42000028"
/*
* Hypercalls for KVM.
*
* Hypercall number is passed in v0.
* Return value will be placed in v0.
* Up to 3 arguments are passed in a0, a1, and a2.
*/
static inline unsigned long kvm_hypercall0(unsigned long num)
{
register unsigned long n asm("v0");
register unsigned long r asm("v0");
n = num;
__asm__ __volatile__(
KVM_HYPERCALL
: "=r" (r) : "r" (n) : "memory"
);
return r;
}
static inline unsigned long kvm_hypercall1(unsigned long num,
unsigned long arg0)
{
register unsigned long n asm("v0");
register unsigned long r asm("v0");
register unsigned long a0 asm("a0");
n = num;
a0 = arg0;
__asm__ __volatile__(
KVM_HYPERCALL
: "=r" (r) : "r" (n), "r" (a0) : "memory"
);
return r;
}
static inline unsigned long kvm_hypercall2(unsigned long num,
unsigned long arg0, unsigned long arg1)
{
register unsigned long n asm("v0");
register unsigned long r asm("v0");
register unsigned long a0 asm("a0");
register unsigned long a1 asm("a1");
n = num;
a0 = arg0;
a1 = arg1;
__asm__ __volatile__(
KVM_HYPERCALL
: "=r" (r) : "r" (n), "r" (a0), "r" (a1) : "memory"
);
return r;
}
static inline unsigned long kvm_hypercall3(unsigned long num,
unsigned long arg0, unsigned long arg1, unsigned long arg2)
{
register unsigned long n asm("v0");
register unsigned long r asm("v0");
register unsigned long a0 asm("a0");
register unsigned long a1 asm("a1");
register unsigned long a2 asm("a2");
n = num;
a0 = arg0;
a1 = arg1;
a2 = arg2;
__asm__ __volatile__(
KVM_HYPERCALL
: "=r" (r) : "r" (n), "r" (a0), "r" (a1), "r" (a2) : "memory"
);
return r;
}
static inline bool kvm_check_and_clear_guest_paused(void)
{
return false;
}
static inline unsigned int kvm_arch_para_features(void)
{
return 0;
}
#ifdef CONFIG_MIPS_PARAVIRT
static inline bool kvm_para_available(void)
{
return true;
}
#else
static inline bool kvm_para_available(void)
{
return false;
}
#endif
#endif /* _ASM_MIPS_KVM_PARA_H */
#include <asm-generic/kvm_para.h> #ifndef _UAPI_ASM_MIPS_KVM_PARA_H
#define _UAPI_ASM_MIPS_KVM_PARA_H
#endif /* _UAPI_ASM_MIPS_KVM_PARA_H */
...@@ -20,6 +20,9 @@ ...@@ -20,6 +20,9 @@
#define KVM_HC_FEATURES 3 #define KVM_HC_FEATURES 3
#define KVM_HC_PPC_MAP_MAGIC_PAGE 4 #define KVM_HC_PPC_MAP_MAGIC_PAGE 4
#define KVM_HC_KICK_CPU 5 #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 * hypercalls use architecture specific
......
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