/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_ACRN_H
#define _ASM_X86_ACRN_H
/*
* This CPUID returns feature bitmaps in EAX .
* Guest VM uses this to detect the appropriate feature bit .
*/
#define ACRN_CPUID_FEATURES 0 x40000001
/* Bit 0 indicates whether guest VM is privileged */
#define ACRN_FEATURE_PRIVILEGED_VM BIT(0 )
/*
* Timing Information .
* This leaf returns the current TSC frequency in kHz .
*
* EAX : ( Virtual ) TSC frequency in kHz .
* EBX , ECX , EDX : RESERVED ( reserved fields are set to zero ) .
*/
#define ACRN_CPUID_TIMING_INFO 0 x40000010
void acrn_setup_intr_handler(void (*handler)(void ));
void acrn_remove_intr_handler(void );
static inline u32 acrn_cpuid_base(void )
{
if (boot_cpu_has(X86_FEATURE_HYPERVISOR))
return cpuid_base_hypervisor("ACRNACRNACRN" , 0 );
return 0 ;
}
static inline unsigned long acrn_get_tsc_khz(void )
{
return cpuid_eax(ACRN_CPUID_TIMING_INFO);
}
/*
* Hypercalls for ACRN
*
* - VMCALL instruction is used to implement ACRN hypercalls .
* - ACRN hypercall ABI :
* - Hypercall number is passed in R8 register .
* - Up to 2 arguments are passed in RDI , RSI .
* - Return value will be placed in RAX .
*
* Because GCC doesn ' t support R8 register as direct register constraints , use
* supported constraint as input with a explicit MOV to R8 in beginning of asm .
*/
static inline long acrn_hypercall0(unsigned long hcall_id)
{
long result;
asm volatile ("movl %1, %%r8d\n\t"
"vmcall\n\t"
: "=a" (result)
: "g" (hcall_id)
: "r8" , "memory" );
return result;
}
static inline long acrn_hypercall1(unsigned long hcall_id,
unsigned long param1)
{
long result;
asm volatile ("movl %1, %%r8d\n\t"
"vmcall\n\t"
: "=a" (result)
: "g" (hcall_id), "D" (param1)
: "r8" , "memory" );
return result;
}
static inline long acrn_hypercall2(unsigned long hcall_id,
unsigned long param1,
unsigned long param2)
{
long result;
asm volatile ("movl %1, %%r8d\n\t"
"vmcall\n\t"
: "=a" (result)
: "g" (hcall_id), "D" (param1), "S" (param2)
: "r8" , "memory" );
return result;
}
#endif /* _ASM_X86_ACRN_H */
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