cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

acrn.h (1834B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _ASM_X86_ACRN_H
      3#define _ASM_X86_ACRN_H
      4
      5/*
      6 * This CPUID returns feature bitmaps in EAX.
      7 * Guest VM uses this to detect the appropriate feature bit.
      8 */
      9#define	ACRN_CPUID_FEATURES		0x40000001
     10/* Bit 0 indicates whether guest VM is privileged */
     11#define	ACRN_FEATURE_PRIVILEGED_VM	BIT(0)
     12
     13void acrn_setup_intr_handler(void (*handler)(void));
     14void acrn_remove_intr_handler(void);
     15
     16static inline u32 acrn_cpuid_base(void)
     17{
     18	if (boot_cpu_has(X86_FEATURE_HYPERVISOR))
     19		return hypervisor_cpuid_base("ACRNACRNACRN", 0);
     20
     21	return 0;
     22}
     23
     24/*
     25 * Hypercalls for ACRN
     26 *
     27 * - VMCALL instruction is used to implement ACRN hypercalls.
     28 * - ACRN hypercall ABI:
     29 *   - Hypercall number is passed in R8 register.
     30 *   - Up to 2 arguments are passed in RDI, RSI.
     31 *   - Return value will be placed in RAX.
     32 *
     33 * Because GCC doesn't support R8 register as direct register constraints, use
     34 * supported constraint as input with a explicit MOV to R8 in beginning of asm.
     35 */
     36static inline long acrn_hypercall0(unsigned long hcall_id)
     37{
     38	long result;
     39
     40	asm volatile("movl %1, %%r8d\n\t"
     41		     "vmcall\n\t"
     42		     : "=a" (result)
     43		     : "g" (hcall_id)
     44		     : "r8", "memory");
     45
     46	return result;
     47}
     48
     49static inline long acrn_hypercall1(unsigned long hcall_id,
     50				   unsigned long param1)
     51{
     52	long result;
     53
     54	asm volatile("movl %1, %%r8d\n\t"
     55		     "vmcall\n\t"
     56		     : "=a" (result)
     57		     : "g" (hcall_id), "D" (param1)
     58		     : "r8", "memory");
     59
     60	return result;
     61}
     62
     63static inline long acrn_hypercall2(unsigned long hcall_id,
     64				   unsigned long param1,
     65				   unsigned long param2)
     66{
     67	long result;
     68
     69	asm volatile("movl %1, %%r8d\n\t"
     70		     "vmcall\n\t"
     71		     : "=a" (result)
     72		     : "g" (hcall_id), "D" (param1), "S" (param2)
     73		     : "r8", "memory");
     74
     75	return result;
     76}
     77
     78#endif /* _ASM_X86_ACRN_H */