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 */
86