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 #endif /* _ASM_POWERPC_ULTRAVISOR_H */ 50