arch/powerpc/include/asm/ultravisor.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Ultravisor definitions
   4  *
   5  * Copyright 2019, IBM Corporation.
   6  *
   7  */
   8 #ifndef _ASM_POWERPC_ULTRAVISOR_H
   9 #define _ASM_POWERPC_ULTRAVISOR_H
  10
  11 #include <asm/asm-prototypes.h>
  12 #include <asm/ultravisor-api.h>
  13 #include <asm/firmware.h>
  14
  15 int early_init_dt_scan_ultravisor(unsigned long node, const char *uname,
  16                                   int depth, void *data);
  17
  18 /*
  19  * In ultravisor enabled systems, PTCR becomes ultravisor privileged only for
  20  * writing and an attempt to write to it will cause a Hypervisor Emulation
  21  * Assistance interrupt.
  22  */
  23 static inline void set_ptcr_when_no_uv(u64 val)
  24 {
  25         if (!firmware_has_feature(FW_FEATURE_ULTRAVISOR))
  26                 mtspr(SPRN_PTCR, val);
  27 }
  28
  29 static inline int uv_register_pate(u64 lpid, u64 dw0, u64 dw1)
  30 {
  31         return ucall_norets(UV_WRITE_PATE, lpid, dw0, dw1);
  32 }
  33
  34 static inline int uv_share_page(u64 pfn, u64 npages)
  35 {
  36         return ucall_norets(UV_SHARE_PAGE, pfn, npages);
  37 }
  38
  39 static inline int uv_unshare_page(u64 pfn, u64 npages)
  40 {
  41         return ucall_norets(UV_UNSHARE_PAGE, pfn, npages);
  42 }
  43
  44 static inline int uv_unshare_all_pages(void)
  45 {
  46         return ucall_norets(UV_UNSHARE_ALL_PAGES);
  47 }
  48
  49 static inline int uv_page_in(u64 lpid, u64 src_ra, u64 dst_gpa, u64 flags,
  50                              u64 page_shift)
  51 {
  52         return ucall_norets(UV_PAGE_IN, lpid, src_ra, dst_gpa, flags,
  53                             page_shift);
  54 }
  55
  56 static inline int uv_page_out(u64 lpid, u64 dst_ra, u64 src_gpa, u64 flags,
  57                               u64 page_shift)
  58 {
  59         return ucall_norets(UV_PAGE_OUT, lpid, dst_ra, src_gpa, flags,
  60                             page_shift);
  61 }
  62
  63 static inline int uv_register_mem_slot(u64 lpid, u64 start_gpa, u64 size,
  64                                        u64 flags, u64 slotid)
  65 {
  66         return ucall_norets(UV_REGISTER_MEM_SLOT, lpid, start_gpa,
  67                             size, flags, slotid);
  68 }
  69
  70 static inline int uv_unregister_mem_slot(u64 lpid, u64 slotid)
  71 {
  72         return ucall_norets(UV_UNREGISTER_MEM_SLOT, lpid, slotid);
  73 }
  74
  75 static inline int uv_page_inval(u64 lpid, u64 gpa, u64 page_shift)
  76 {
  77         return ucall_norets(UV_PAGE_INVAL, lpid, gpa, page_shift);
  78 }
  79
  80 static inline int uv_svm_terminate(u64 lpid)
  81 {
  82         return ucall_norets(UV_SVM_TERMINATE, lpid);
  83 }
  84
  85 #endif  /* _ASM_POWERPC_ULTRAVISOR_H */