Hollis Blanchard | bbf45ba | 2008-04-16 23:28:09 -0500 | [diff] [blame] | 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 __POWERPC_KVM_PARA_H__ |
| 21 | #define __POWERPC_KVM_PARA_H__ |
| 22 | |
Alexander Graf | 96bc451 | 2010-07-29 14:47:42 +0200 | [diff] [blame] | 23 | #include <linux/types.h> |
| 24 | |
Scott Wood | 54f6579 | 2012-01-11 13:37:35 +0000 | [diff] [blame] | 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 | */ |
Alexander Graf | 96bc451 | 2010-07-29 14:47:42 +0200 | [diff] [blame] | 35 | struct kvm_vcpu_arch_shared { |
Alexander Graf | fad93fe | 2010-07-29 14:47:50 +0200 | [diff] [blame] | 36 | __u64 scratch1; |
| 37 | __u64 scratch2; |
| 38 | __u64 scratch3; |
Alexander Graf | 5c6cedf | 2010-07-29 14:47:49 +0200 | [diff] [blame] | 39 | __u64 critical; /* Guest may not get interrupts if == r1 */ |
Alexander Graf | a73a959 | 2010-07-29 14:47:47 +0200 | [diff] [blame] | 40 | __u64 sprg0; |
| 41 | __u64 sprg1; |
| 42 | __u64 sprg2; |
| 43 | __u64 sprg3; |
Alexander Graf | de7906c | 2010-07-29 14:47:46 +0200 | [diff] [blame] | 44 | __u64 srr0; |
| 45 | __u64 srr1; |
Scott Wood | b590497 | 2011-11-08 18:23:30 -0600 | [diff] [blame] | 46 | __u64 dar; /* dear on BookE */ |
Alexander Graf | 666e725 | 2010-07-29 14:47:43 +0200 | [diff] [blame] | 47 | __u64 msr; |
Alexander Graf | d562de4 | 2010-07-29 14:47:44 +0200 | [diff] [blame] | 48 | __u32 dsisr; |
Alexander Graf | 90bba35 | 2010-07-29 14:47:51 +0200 | [diff] [blame] | 49 | __u32 int_pending; /* Tells the guest if we have an interrupt */ |
Alexander Graf | df1bfa2 | 2010-08-03 02:29:27 +0200 | [diff] [blame] | 50 | __u32 sr[16]; |
Scott Wood | b590497 | 2011-11-08 18:23:30 -0600 | [diff] [blame] | 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; |
Alexander Graf | 96bc451 | 2010-07-29 14:47:42 +0200 | [diff] [blame] | 75 | }; |
| 76 | |
Alexander Graf | 2a342ed | 2010-07-29 14:47:48 +0200 | [diff] [blame] | 77 | #define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */ |
| 78 | #define HC_VENDOR_KVM (42 << 16) |
| 79 | #define HC_EV_SUCCESS 0 |
| 80 | #define HC_EV_UNIMPLEMENTED 12 |
| 81 | |
Alexander Graf | 5fc8740 | 2010-07-29 14:47:55 +0200 | [diff] [blame] | 82 | #define KVM_FEATURE_MAGIC_PAGE 1 |
| 83 | |
Scott Wood | b590497 | 2011-11-08 18:23:30 -0600 | [diff] [blame] | 84 | #define KVM_MAGIC_FEAT_SR (1 << 0) |
| 85 | |
| 86 | /* MASn, ESR, PIR, and high SPRGs */ |
| 87 | #define KVM_MAGIC_FEAT_MAS0_TO_SPRG7 (1 << 1) |
Alexander Graf | 7508e16 | 2010-08-03 11:32:56 +0200 | [diff] [blame] | 88 | |
Hollis Blanchard | bbf45ba | 2008-04-16 23:28:09 -0500 | [diff] [blame] | 89 | #ifdef __KERNEL__ |
| 90 | |
Alexander Graf | 2a342ed | 2010-07-29 14:47:48 +0200 | [diff] [blame] | 91 | #ifdef CONFIG_KVM_GUEST |
| 92 | |
Alexander Graf | 26e673c | 2010-09-03 10:22:19 +0200 | [diff] [blame] | 93 | #include <linux/of.h> |
| 94 | |
Alexander Graf | 2a342ed | 2010-07-29 14:47:48 +0200 | [diff] [blame] | 95 | static inline int kvm_para_available(void) |
| 96 | { |
| 97 | struct device_node *hyper_node; |
| 98 | |
| 99 | hyper_node = of_find_node_by_path("/hypervisor"); |
| 100 | if (!hyper_node) |
| 101 | return 0; |
| 102 | |
| 103 | if (!of_device_is_compatible(hyper_node, "linux,kvm")) |
| 104 | return 0; |
| 105 | |
| 106 | return 1; |
| 107 | } |
| 108 | |
| 109 | extern unsigned long kvm_hypercall(unsigned long *in, |
| 110 | unsigned long *out, |
| 111 | unsigned long nr); |
| 112 | |
| 113 | #else |
| 114 | |
Hollis Blanchard | bbf45ba | 2008-04-16 23:28:09 -0500 | [diff] [blame] | 115 | static inline int kvm_para_available(void) |
| 116 | { |
| 117 | return 0; |
| 118 | } |
| 119 | |
Alexander Graf | 2a342ed | 2010-07-29 14:47:48 +0200 | [diff] [blame] | 120 | static unsigned long kvm_hypercall(unsigned long *in, |
| 121 | unsigned long *out, |
| 122 | unsigned long nr) |
| 123 | { |
| 124 | return HC_EV_UNIMPLEMENTED; |
| 125 | } |
| 126 | |
| 127 | #endif |
| 128 | |
| 129 | static inline long kvm_hypercall0_1(unsigned int nr, unsigned long *r2) |
| 130 | { |
| 131 | unsigned long in[8]; |
| 132 | unsigned long out[8]; |
| 133 | unsigned long r; |
| 134 | |
| 135 | r = kvm_hypercall(in, out, nr | HC_VENDOR_KVM); |
| 136 | *r2 = out[0]; |
| 137 | |
| 138 | return r; |
| 139 | } |
| 140 | |
| 141 | static inline long kvm_hypercall0(unsigned int nr) |
| 142 | { |
| 143 | unsigned long in[8]; |
| 144 | unsigned long out[8]; |
| 145 | |
| 146 | return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); |
| 147 | } |
| 148 | |
| 149 | static inline long kvm_hypercall1(unsigned int nr, unsigned long p1) |
| 150 | { |
| 151 | unsigned long in[8]; |
| 152 | unsigned long out[8]; |
| 153 | |
| 154 | in[0] = p1; |
| 155 | return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); |
| 156 | } |
| 157 | |
| 158 | static inline long kvm_hypercall2(unsigned int nr, unsigned long p1, |
| 159 | unsigned long p2) |
| 160 | { |
| 161 | unsigned long in[8]; |
| 162 | unsigned long out[8]; |
| 163 | |
| 164 | in[0] = p1; |
| 165 | in[1] = p2; |
| 166 | return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); |
| 167 | } |
| 168 | |
| 169 | static inline long kvm_hypercall3(unsigned int nr, unsigned long p1, |
| 170 | unsigned long p2, unsigned long p3) |
| 171 | { |
| 172 | unsigned long in[8]; |
| 173 | unsigned long out[8]; |
| 174 | |
| 175 | in[0] = p1; |
| 176 | in[1] = p2; |
| 177 | in[2] = p3; |
| 178 | return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); |
| 179 | } |
| 180 | |
| 181 | static inline long kvm_hypercall4(unsigned int nr, unsigned long p1, |
| 182 | unsigned long p2, unsigned long p3, |
| 183 | unsigned long p4) |
| 184 | { |
| 185 | unsigned long in[8]; |
| 186 | unsigned long out[8]; |
| 187 | |
| 188 | in[0] = p1; |
| 189 | in[1] = p2; |
| 190 | in[2] = p3; |
| 191 | in[3] = p4; |
| 192 | return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); |
| 193 | } |
| 194 | |
| 195 | |
Hollis Blanchard | bbf45ba | 2008-04-16 23:28:09 -0500 | [diff] [blame] | 196 | static inline unsigned int kvm_arch_para_features(void) |
| 197 | { |
Alexander Graf | 2a342ed | 2010-07-29 14:47:48 +0200 | [diff] [blame] | 198 | unsigned long r; |
| 199 | |
| 200 | if (!kvm_para_available()) |
| 201 | return 0; |
| 202 | |
| 203 | if(kvm_hypercall0_1(KVM_HC_FEATURES, &r)) |
| 204 | return 0; |
| 205 | |
| 206 | return r; |
Hollis Blanchard | bbf45ba | 2008-04-16 23:28:09 -0500 | [diff] [blame] | 207 | } |
| 208 | |
Eric B Munson | 3b5d56b | 2012-03-10 14:37:26 -0500 | [diff] [blame] | 209 | static inline bool kvm_check_and_clear_guest_paused(void) |
| 210 | { |
| 211 | return false; |
| 212 | } |
| 213 | |
Hollis Blanchard | bbf45ba | 2008-04-16 23:28:09 -0500 | [diff] [blame] | 214 | #endif /* __KERNEL__ */ |
| 215 | |
| 216 | #endif /* __POWERPC_KVM_PARA_H__ */ |