LXR linux/arch/x86/kvm/svm/svm

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __KVM_X86_SVM_OPS_H
   3#define __KVM_X86_SVM_OPS_H
   4
   5#include <linux/compiler_types.h>
   6
   7#include "x86.h"
   8
   9#define svm_asm(insn, clobber...)                               \
  10do {                                                            \
  11        asm_volatile_goto("1: " __stringify(insn) "\n\t"        \
  12                          _ASM_EXTABLE(1b, %l[fault])           \
  13                          ::: clobber : fault);                 \
  14        return;                                                 \
  15fault:                                                          \
  16        kvm_spurious_fault();                                   \
  17} while (0)
  18
  19#define svm_asm1(insn, op1, clobber...)                         \
  20do {                                                            \
  21        asm_volatile_goto("1: "  __stringify(insn) " %0\n\t"    \
  22                          _ASM_EXTABLE(1b, %l[fault])           \
  23                          :: op1 : clobber : fault);            \
  24        return;                                                 \
  25fault:                                                          \
  26        kvm_spurious_fault();                                   \
  27} while (0)
  28
  29#define svm_asm2(insn, op1, op2, clobber...)                            \
  30do {                                                                    \
  31        asm_volatile_goto("1: "  __stringify(insn) " %1, %0\n\t"        \
  32                          _ASM_EXTABLE(1b, %l[fault])                   \
  33                          :: op1, op2 : clobber : fault);               \
  34        return;                                                         \
  35fault:                                                                  \
  36        kvm_spurious_fault();                                           \
  37} while (0)
  38
  39static inline void clgi(void)
  40{
  41        svm_asm(clgi);
  42}
  43
  44static inline void stgi(void)
  45{
  46        svm_asm(stgi);
  47}
  48
  49static inline void invlpga(unsigned long addr, u32 asid)
  50{
  51        svm_asm2(invlpga, "c"(asid), "a"(addr));
  52}
  53
  54/*
  55 * Despite being a physical address, the portion of rAX that is consumed by
  56 * VMSAVE, VMLOAD, etc... is still controlled by the effective address size,
  57 * hence 'unsigned long' instead of 'hpa_t'.
  58 */
  59static inline void vmsave(unsigned long pa)
  60{
  61        svm_asm1(vmsave, "a" (pa), "memory");
  62}
  63
  64static inline void vmload(unsigned long pa)
  65{
  66        svm_asm1(vmload, "a" (pa), "memory");
  67}
  68
  69#endif /* __KVM_X86_SVM_OPS_H */
  70