1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * This program is free software; you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License, version 2, as 5 * published by the Free Software Foundation. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 15 * 16 * Copyright IBM Corp. 2008 17 * 18 * Authors: Hollis Blanchard <hollisb@us.ibm.com> 19 */ 20 21 #ifndef _UAPI__POWERPC_KVM_PARA_H__ 22 #define _UAPI__POWERPC_KVM_PARA_H__ 23 24 #include <linux/types.h> 25 26 /* 27 * Additions to this struct must only occur at the end, and should be 28 * accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present 29 * (albeit not necessarily relevant to the current target hardware platform). 30 * 31 * Struct fields are always 32 or 64 bit aligned, depending on them being 32 32 * or 64 bit wide respectively. 33 * 34 * See Documentation/virtual/kvm/ppc-pv.txt 35 */ 36 struct kvm_vcpu_arch_shared { 37 __u64 scratch1; 38 __u64 scratch2; 39 __u64 scratch3; 40 __u64 critical; /* Guest may not get interrupts if == r1 */ 41 __u64 sprg0; 42 __u64 sprg1; 43 __u64 sprg2; 44 __u64 sprg3; 45 __u64 srr0; 46 __u64 srr1; 47 __u64 dar; /* dear on BookE */ 48 __u64 msr; 49 __u32 dsisr; 50 __u32 int_pending; /* Tells the guest if we have an interrupt */ 51 __u32 sr[16]; 52 __u32 mas0; 53 __u32 mas1; 54 __u64 mas7_3; 55 __u64 mas2; 56 __u32 mas4; 57 __u32 mas6; 58 __u32 esr; 59 __u32 pir; 60 61 /* 62 * SPRG4-7 are user-readable, so we can only keep these consistent 63 * between the shared area and the real registers when there's an 64 * intervening exit to KVM. This also applies to SPRG3 on some 65 * chips. 66 * 67 * This suffices for access by guest userspace, since in PR-mode 68 * KVM, an exit must occur when changing the guest's MSR[PR]. 69 * If the guest kernel writes to SPRG3-7 via the shared area, it 70 * must also use the shared area for reading while in kernel space. 71 */ 72 __u64 sprg4; 73 __u64 sprg5; 74 __u64 sprg6; 75 __u64 sprg7; 76 }; 77 78 #define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */ 79 80 #define KVM_HCALL_TOKEN(num) _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num) 81 82 #include <asm/epapr_hcalls.h> 83 84 #define KVM_FEATURE_MAGIC_PAGE 1 85 86 /* Magic page flags from host to guest */ 87 88 #define KVM_MAGIC_FEAT_SR (1 << 0) 89 90 /* MASn, ESR, PIR, and high SPRGs */ 91 #define KVM_MAGIC_FEAT_MAS0_TO_SPRG7 (1 << 1) 92 93 /* Magic page flags from guest to host */ 94 95 #define MAGIC_PAGE_FLAG_NOT_MAPPED_NX (1 << 0) 96 97 98 #endif /* _UAPI__POWERPC_KVM_PARA_H__ */ 99