Contributors: 19
Author Tokens Token Proportion Commits Commit Proportion
Christian Bornträger 145 39.30% 1 4.55%
Gleb Natapov 45 12.20% 1 4.55%
Paolo Bonzini 45 12.20% 3 13.64%
Srivatsa Vaddagiri 25 6.78% 1 4.55%
Glauber de Oliveira Costa 24 6.50% 2 9.09%
Eric B Munson 24 6.50% 1 4.55%
Wanpeng Li 20 5.42% 1 4.55%
Yi Wang 13 3.52% 1 4.55%
Boqun Feng 5 1.36% 1 4.55%
Alexander Graf 5 1.36% 1 4.55%
Anthony Liguori 5 1.36% 1 4.55%
H. Peter Anvin 3 0.81% 1 4.55%
Avi Kivity 2 0.54% 1 4.55%
Marcelo Tosatti 2 0.54% 1 4.55%
David Howells 2 0.54% 1 4.55%
Jan Kiszka 1 0.27% 1 4.55%
Jesse Larrew 1 0.27% 1 4.55%
Joe Perches 1 0.27% 1 4.55%
Greg Kroah-Hartman 1 0.27% 1 4.55%
Total 369 22


/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_KVM_PARA_H
#define _ASM_X86_KVM_PARA_H

#include <asm/processor.h>
#include <asm/alternative.h>
#include <uapi/asm/kvm_para.h>

extern void kvmclock_init(void);

#ifdef CONFIG_KVM_GUEST
bool kvm_check_and_clear_guest_paused(void);
#else
static inline bool kvm_check_and_clear_guest_paused(void)
{
	return false;
}
#endif /* CONFIG_KVM_GUEST */

#define KVM_HYPERCALL \
        ALTERNATIVE(".byte 0x0f,0x01,0xc1", ".byte 0x0f,0x01,0xd9", X86_FEATURE_VMMCALL)

/* For KVM hypercalls, a three-byte sequence of either the vmcall or the vmmcall
 * instruction.  The hypervisor may replace it with something else but only the
 * instructions are guaranteed to be supported.
 *
 * Up to four arguments may be passed in rbx, rcx, rdx, and rsi respectively.
 * The hypercall number should be placed in rax and the return value will be
 * placed in rax.  No other registers will be clobbered unless explicitly
 * noted by the particular hypercall.
 */

static inline long kvm_hypercall0(unsigned int nr)
{
	long ret;
	asm volatile(KVM_HYPERCALL
		     : "=a"(ret)
		     : "a"(nr)
		     : "memory");
	return ret;
}

static inline long kvm_hypercall1(unsigned int nr, unsigned long p1)
{
	long ret;
	asm volatile(KVM_HYPERCALL
		     : "=a"(ret)
		     : "a"(nr), "b"(p1)
		     : "memory");
	return ret;
}

static inline long kvm_hypercall2(unsigned int nr, unsigned long p1,
				  unsigned long p2)
{
	long ret;
	asm volatile(KVM_HYPERCALL
		     : "=a"(ret)
		     : "a"(nr), "b"(p1), "c"(p2)
		     : "memory");
	return ret;
}

static inline long kvm_hypercall3(unsigned int nr, unsigned long p1,
				  unsigned long p2, unsigned long p3)
{
	long ret;
	asm volatile(KVM_HYPERCALL
		     : "=a"(ret)
		     : "a"(nr), "b"(p1), "c"(p2), "d"(p3)
		     : "memory");
	return ret;
}

static inline long kvm_hypercall4(unsigned int nr, unsigned long p1,
				  unsigned long p2, unsigned long p3,
				  unsigned long p4)
{
	long ret;
	asm volatile(KVM_HYPERCALL
		     : "=a"(ret)
		     : "a"(nr), "b"(p1), "c"(p2), "d"(p3), "S"(p4)
		     : "memory");
	return ret;
}

#ifdef CONFIG_KVM_GUEST
bool kvm_para_available(void);
unsigned int kvm_arch_para_features(void);
unsigned int kvm_arch_para_hints(void);
void kvm_async_pf_task_wait(u32 token, int interrupt_kernel);
void kvm_async_pf_task_wake(u32 token);
u32 kvm_read_and_reset_pf_reason(void);
extern void kvm_disable_steal_time(void);
void do_async_page_fault(struct pt_regs *regs, unsigned long error_code);

#ifdef CONFIG_PARAVIRT_SPINLOCKS
void __init kvm_spinlock_init(void);
#else /* !CONFIG_PARAVIRT_SPINLOCKS */
static inline void kvm_spinlock_init(void)
{
}
#endif /* CONFIG_PARAVIRT_SPINLOCKS */

#else /* CONFIG_KVM_GUEST */
#define kvm_async_pf_task_wait(T, I) do {} while(0)
#define kvm_async_pf_task_wake(T) do {} while(0)

static inline bool kvm_para_available(void)
{
	return false;
}

static inline unsigned int kvm_arch_para_features(void)
{
	return 0;
}

static inline unsigned int kvm_arch_para_hints(void)
{
	return 0;
}

static inline u32 kvm_read_and_reset_pf_reason(void)
{
	return 0;
}

static inline void kvm_disable_steal_time(void)
{
	return;
}
#endif

#endif /* _ASM_X86_KVM_PARA_H */