arch/x86/kvm/svm/svm_ops.h

   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 <asm/kvm_host.h>
   8
   9 #define svm_asm(insn, clobber...)                               \
  10 do {                                                            \
  11         asm_volatile_goto("1: " __stringify(insn) "\n\t"        \
  12                           _ASM_EXTABLE(1b, %l[fault])           \
  13                           ::: clobber : fault);                 \
  14         return;                                                 \
  15 fault:                                                          \
  16         kvm_spurious_fault();                                   \
  17 } while (0)
  18
  19 #define svm_asm1(insn, op1, clobber...)                         \
  20 do {                                                            \
  21         asm_volatile_goto("1: "  __stringify(insn) " %0\n\t"    \
  22                           _ASM_EXTABLE(1b, %l[fault])           \
  23                           :: op1 : clobber : fault);            \
  24         return;                                                 \
  25 fault:                                                          \
  26         kvm_spurious_fault();                                   \
  27 } while (0)
  28
  29 #define svm_asm2(insn, op1, op2, clobber...)                            \
  30 do {                                                                    \
  31         asm_volatile_goto("1: "  __stringify(insn) " %1, %0\n\t"        \
  32                           _ASM_EXTABLE(1b, %l[fault])                   \
  33                           :: op1, op2 : clobber : fault);               \
  34         return;                                                         \
  35 fault:                                                                  \
  36         kvm_spurious_fault();                                           \
  37 } while (0)
  38
  39 static inline void clgi(void)
  40 {
  41         svm_asm(clgi);
  42 }
  43
  44 static inline void stgi(void)
  45 {
  46         svm_asm(stgi);
  47 }
  48
  49 static 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  */
  59 static inline void vmsave(unsigned long pa)
  60 {
  61         svm_asm1(vmsave, "a" (pa), "memory");
  62 }
  63
  64 #endif /* __KVM_X86_SVM_OPS_H */