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kvm_booke_hv_asm.h

kvm_booke_hv_asm.h 2.0 KB
Cronologia Originale

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  1. /*
    2. 

  2.  * Copyright 2010-2011 Freescale Semiconductor, Inc.
    3. 

  3.  *
    4. 

  4.  * This program is free software; you can redistribute it and/or modify
    5. 

  5.  * it under the terms of the GNU General Public License, version 2, as
    6. 

  6.  * published by the Free Software Foundation.
    7. 

  7.  */
    8. 

  8. 

  9. #ifndef ASM_KVM_BOOKE_HV_ASM_H
    10. 

  10. #define ASM_KVM_BOOKE_HV_ASM_H
    11. 

  11. 

  12. #ifdef __ASSEMBLY__
    13. 

  13. 

  14. /*
    15. 

  15.  * All exceptions from guest state must go through KVM
    16. 

  16.  * (except for those which are delivered directly to the guest) --
    17. 

  17.  * there are no exceptions for which we fall through directly to
    18. 

  18.  * the normal host handler.
    19. 

  19.  *
    20. 

  20.  * 32-bit host
    21. 

  21.  * Expected inputs (normal exceptions):
    22. 

  22.  *   SCRATCH0 = saved r10
    23. 

  23.  *   r10 = thread struct
    24. 

  24.  *   r11 = appropriate SRR1 variant (currently used as scratch)
    25. 

  25.  *   r13 = saved CR
    26. 

  26.  *   *(r10 + THREAD_NORMSAVE(0)) = saved r11
    27. 

  27.  *   *(r10 + THREAD_NORMSAVE(2)) = saved r13
    28. 

  28.  *
    29. 

  29.  * Expected inputs (crit/mcheck/debug exceptions):
    30. 

  30.  *   appropriate SCRATCH = saved r8
    31. 

  31.  *   r8 = exception level stack frame
    32. 

  32.  *   r9 = *(r8 + _CCR) = saved CR
    33. 

  33.  *   r11 = appropriate SRR1 variant (currently used as scratch)
    34. 

  34.  *   *(r8 + GPR9) = saved r9
    35. 

  35.  *   *(r8 + GPR10) = saved r10 (r10 not yet clobbered)
    36. 

  36.  *   *(r8 + GPR11) = saved r11
    37. 

  37.  *
    38. 

  38.  * 64-bit host
    39. 

  39.  * Expected inputs (GEN/GDBELL/DBG/CRIT/MC exception types):
    40. 

  40.  *  r10 = saved CR
    41. 

  41.  *  r13 = PACA_POINTER
    42. 

  42.  *  *(r13 + PACA_EX##type + EX_R10) = saved r10
    43. 

  43.  *  *(r13 + PACA_EX##type + EX_R11) = saved r11
    44. 

  44.  *  SPRN_SPRG_##type##_SCRATCH = saved r13
    45. 

  45.  *
    46. 

  46.  * Expected inputs (TLB exception type):
    47. 

  47.  *  r10 = saved CR
    48. 

  48.  *  r12 = extlb pointer
    49. 

  49.  *  r13 = PACA_POINTER
    50. 

  50.  *  *(r12 + EX_TLB_R10) = saved r10
    51. 

  51.  *  *(r12 + EX_TLB_R11) = saved r11
    52. 

  52.  *  *(r12 + EX_TLB_R13) = saved r13
    53. 

  53.  *  SPRN_SPRG_GEN_SCRATCH = saved r12
    54. 

  54.  *
    55. 

  55.  * Only the bolted version of TLB miss exception handlers is supported now.
    56. 

  56.  */
    57. 

  57. .macro DO_KVM intno srr1
    58. 

  58. #ifdef CONFIG_KVM_BOOKE_HV
    59. 

  59. BEGIN_FTR_SECTION
    60. 

  60. 	mtocrf	0x80, r11	/* check MSR[GS] without clobbering reg */
    61. 

  61. 	bf	3, 1975f
    62. 

  62. 	b	kvmppc_handler_\intno\()_\srr1
    63. 

  63. 1975:
    64. 

  64. END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
    65. 

  65. #endif
    66. 

  66. .endm
    67. 

  67. 

  68. #endif /*__ASSEMBLY__ */
    69. 

  69. #endif /* ASM_KVM_BOOKE_HV_ASM_H */
    70. 

  70.