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 */
set_ptcr_when_no_uv(u64 val)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
uv_register_pate(u64 lpid,u64 dw0,u64 dw1)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
uv_share_page(u64 pfn,u64 npages)34 static inline int uv_share_page(u64 pfn, u64 npages)
35 {
36 return ucall_norets(UV_SHARE_PAGE, pfn, npages);
37 }
38
uv_unshare_page(u64 pfn,u64 npages)39 static inline int uv_unshare_page(u64 pfn, u64 npages)
40 {
41 return ucall_norets(UV_UNSHARE_PAGE, pfn, npages);
42 }
43
uv_unshare_all_pages(void)44 static inline int uv_unshare_all_pages(void)
45 {
46 return ucall_norets(UV_UNSHARE_ALL_PAGES);
47 }
48
49 #endif /* _ASM_POWERPC_ULTRAVISOR_H */
50