1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or modify 4*4882a593Smuzhiyun * it under the terms of the GNU General Public License, version 2, as 5*4882a593Smuzhiyun * published by the Free Software Foundation. 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * This program is distributed in the hope that it will be useful, 8*4882a593Smuzhiyun * but WITHOUT ANY WARRANTY; without even the implied warranty of 9*4882a593Smuzhiyun * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10*4882a593Smuzhiyun * GNU General Public License for more details. 11*4882a593Smuzhiyun * 12*4882a593Smuzhiyun * You should have received a copy of the GNU General Public License 13*4882a593Smuzhiyun * along with this program; if not, write to the Free Software 14*4882a593Smuzhiyun * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 15*4882a593Smuzhiyun * 16*4882a593Smuzhiyun * Copyright IBM Corp. 2008 17*4882a593Smuzhiyun * 18*4882a593Smuzhiyun * Authors: Hollis Blanchard <hollisb@us.ibm.com> 19*4882a593Smuzhiyun */ 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun #ifndef _UAPI__POWERPC_KVM_PARA_H__ 22*4882a593Smuzhiyun #define _UAPI__POWERPC_KVM_PARA_H__ 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun #include <linux/types.h> 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun /* 27*4882a593Smuzhiyun * Additions to this struct must only occur at the end, and should be 28*4882a593Smuzhiyun * accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present 29*4882a593Smuzhiyun * (albeit not necessarily relevant to the current target hardware platform). 30*4882a593Smuzhiyun * 31*4882a593Smuzhiyun * Struct fields are always 32 or 64 bit aligned, depending on them being 32 32*4882a593Smuzhiyun * or 64 bit wide respectively. 33*4882a593Smuzhiyun * 34*4882a593Smuzhiyun * See Documentation/virt/kvm/ppc-pv.rst 35*4882a593Smuzhiyun */ 36*4882a593Smuzhiyun struct kvm_vcpu_arch_shared { 37*4882a593Smuzhiyun __u64 scratch1; 38*4882a593Smuzhiyun __u64 scratch2; 39*4882a593Smuzhiyun __u64 scratch3; 40*4882a593Smuzhiyun __u64 critical; /* Guest may not get interrupts if == r1 */ 41*4882a593Smuzhiyun __u64 sprg0; 42*4882a593Smuzhiyun __u64 sprg1; 43*4882a593Smuzhiyun __u64 sprg2; 44*4882a593Smuzhiyun __u64 sprg3; 45*4882a593Smuzhiyun __u64 srr0; 46*4882a593Smuzhiyun __u64 srr1; 47*4882a593Smuzhiyun __u64 dar; /* dear on BookE */ 48*4882a593Smuzhiyun __u64 msr; 49*4882a593Smuzhiyun __u32 dsisr; 50*4882a593Smuzhiyun __u32 int_pending; /* Tells the guest if we have an interrupt */ 51*4882a593Smuzhiyun __u32 sr[16]; 52*4882a593Smuzhiyun __u32 mas0; 53*4882a593Smuzhiyun __u32 mas1; 54*4882a593Smuzhiyun __u64 mas7_3; 55*4882a593Smuzhiyun __u64 mas2; 56*4882a593Smuzhiyun __u32 mas4; 57*4882a593Smuzhiyun __u32 mas6; 58*4882a593Smuzhiyun __u32 esr; 59*4882a593Smuzhiyun __u32 pir; 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun /* 62*4882a593Smuzhiyun * SPRG4-7 are user-readable, so we can only keep these consistent 63*4882a593Smuzhiyun * between the shared area and the real registers when there's an 64*4882a593Smuzhiyun * intervening exit to KVM. This also applies to SPRG3 on some 65*4882a593Smuzhiyun * chips. 66*4882a593Smuzhiyun * 67*4882a593Smuzhiyun * This suffices for access by guest userspace, since in PR-mode 68*4882a593Smuzhiyun * KVM, an exit must occur when changing the guest's MSR[PR]. 69*4882a593Smuzhiyun * If the guest kernel writes to SPRG3-7 via the shared area, it 70*4882a593Smuzhiyun * must also use the shared area for reading while in kernel space. 71*4882a593Smuzhiyun */ 72*4882a593Smuzhiyun __u64 sprg4; 73*4882a593Smuzhiyun __u64 sprg5; 74*4882a593Smuzhiyun __u64 sprg6; 75*4882a593Smuzhiyun __u64 sprg7; 76*4882a593Smuzhiyun }; 77*4882a593Smuzhiyun 78*4882a593Smuzhiyun #define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */ 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun #define KVM_HCALL_TOKEN(num) _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num) 81*4882a593Smuzhiyun 82*4882a593Smuzhiyun #include <asm/epapr_hcalls.h> 83*4882a593Smuzhiyun 84*4882a593Smuzhiyun #define KVM_FEATURE_MAGIC_PAGE 1 85*4882a593Smuzhiyun 86*4882a593Smuzhiyun /* Magic page flags from host to guest */ 87*4882a593Smuzhiyun 88*4882a593Smuzhiyun #define KVM_MAGIC_FEAT_SR (1 << 0) 89*4882a593Smuzhiyun 90*4882a593Smuzhiyun /* MASn, ESR, PIR, and high SPRGs */ 91*4882a593Smuzhiyun #define KVM_MAGIC_FEAT_MAS0_TO_SPRG7 (1 << 1) 92*4882a593Smuzhiyun 93*4882a593Smuzhiyun /* Magic page flags from guest to host */ 94*4882a593Smuzhiyun 95*4882a593Smuzhiyun #define MAGIC_PAGE_FLAG_NOT_MAPPED_NX (1 << 0) 96*4882a593Smuzhiyun 97*4882a593Smuzhiyun 98*4882a593Smuzhiyun #endif /* _UAPI__POWERPC_KVM_PARA_H__ */ 99