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android_kernel_...
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arch
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arm64
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include
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asm
/
kvm_mte.h

kvm_mte.h 1.3 KB
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  1. /* SPDX-License-Identifier: GPL-2.0 */
    2. 

  2. /*
    3. 

  3.  * Copyright (C) 2020-2021 ARM Ltd.
    4. 

  4.  */
    5. 

  5. #ifndef __ASM_KVM_MTE_H
    6. 

  6. #define __ASM_KVM_MTE_H
    7. 

  7. 

  8. #ifdef __ASSEMBLY__
    9. 

  9. 

  10. #include <asm/sysreg.h>
    11. 

  11. 

  12. #ifdef CONFIG_ARM64_MTE
    13. 

  13. 

  14. .macro mte_switch_to_guest g_ctxt, h_ctxt, reg1
    15. 

  15. alternative_if_not ARM64_MTE
    16. 

  16. 	b	.L__skip_switch\@
    17. 

  17. alternative_else_nop_endif
    18. 

  18. 	mrs	\reg1, hcr_el2
    19. 

  19. 	tbz	\reg1, #(HCR_ATA_SHIFT), .L__skip_switch\@
    20. 

  20. 

  21. 	mrs_s	\reg1, SYS_RGSR_EL1
    22. 

  22. 	str	\reg1, [\h_ctxt, #CPU_RGSR_EL1]
    23. 

  23. 	mrs_s	\reg1, SYS_GCR_EL1
    24. 

  24. 	str	\reg1, [\h_ctxt, #CPU_GCR_EL1]
    25. 

  25. 

  26. 	ldr	\reg1, [\g_ctxt, #CPU_RGSR_EL1]
    27. 

  27. 	msr_s	SYS_RGSR_EL1, \reg1
    28. 

  28. 	ldr	\reg1, [\g_ctxt, #CPU_GCR_EL1]
    29. 

  29. 	msr_s	SYS_GCR_EL1, \reg1
    30. 

  30. 

  31. .L__skip_switch\@:
    32. 

  32. .endm
    33. 

  33. 

  34. .macro mte_switch_to_hyp g_ctxt, h_ctxt, reg1
    35. 

  35. alternative_if_not ARM64_MTE
    36. 

  36. 	b	.L__skip_switch\@
    37. 

  37. alternative_else_nop_endif
    38. 

  38. 	mrs	\reg1, hcr_el2
    39. 

  39. 	tbz	\reg1, #(HCR_ATA_SHIFT), .L__skip_switch\@
    40. 

  40. 

  41. 	mrs_s	\reg1, SYS_RGSR_EL1
    42. 

  42. 	str	\reg1, [\g_ctxt, #CPU_RGSR_EL1]
    43. 

  43. 	mrs_s	\reg1, SYS_GCR_EL1
    44. 

  44. 	str	\reg1, [\g_ctxt, #CPU_GCR_EL1]
    45. 

  45. 

  46. 	ldr	\reg1, [\h_ctxt, #CPU_RGSR_EL1]
    47. 

  47. 	msr_s	SYS_RGSR_EL1, \reg1
    48. 

  48. 	ldr	\reg1, [\h_ctxt, #CPU_GCR_EL1]
    49. 

  49. 	msr_s	SYS_GCR_EL1, \reg1
    50. 

  50. 

  51. 	isb
    52. 

  52. 

  53. .L__skip_switch\@:
    54. 

  54. .endm
    55. 

  55. 

  56. #else /* !CONFIG_ARM64_MTE */
    57. 

  57. 

  58. .macro mte_switch_to_guest g_ctxt, h_ctxt, reg1
    59. 

  59. .endm
    60. 

  60. 

  61. .macro mte_switch_to_hyp g_ctxt, h_ctxt, reg1
    62. 

  62. .endm
    63. 

  63. 

  64. #endif /* CONFIG_ARM64_MTE */
    65. 

  65. #endif /* __ASSEMBLY__ */
    66. 

  66. #endif /* __ASM_KVM_MTE_H */
    67.