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