aurel32 | d76d165 | 2008-12-16 10:43:58 +0000 | [diff] [blame] | 1 | /* |
| 2 | * PowerPC implementation of KVM hooks |
| 3 | * |
| 4 | * Copyright IBM Corp. 2007 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Jerone Young <jyoung5@us.ibm.com> |
| 8 | * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> |
| 9 | * Hollis Blanchard <hollisb@us.ibm.com> |
| 10 | * |
| 11 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 12 | * See the COPYING file in the top-level directory. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <sys/types.h> |
| 17 | #include <sys/ioctl.h> |
| 18 | #include <sys/mman.h> |
| 19 | |
| 20 | #include <linux/kvm.h> |
| 21 | |
| 22 | #include "qemu-common.h" |
| 23 | #include "qemu-timer.h" |
| 24 | #include "sysemu.h" |
| 25 | #include "kvm.h" |
| 26 | #include "kvm_ppc.h" |
| 27 | #include "cpu.h" |
| 28 | #include "device_tree.h" |
| 29 | |
| 30 | //#define DEBUG_KVM |
| 31 | |
| 32 | #ifdef DEBUG_KVM |
| 33 | #define dprintf(fmt, ...) \ |
| 34 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
| 35 | #else |
| 36 | #define dprintf(fmt, ...) \ |
| 37 | do { } while (0) |
| 38 | #endif |
| 39 | |
| 40 | int kvm_arch_init(KVMState *s, int smp_cpus) |
| 41 | { |
| 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | int kvm_arch_init_vcpu(CPUState *cenv) |
| 46 | { |
Alexander Graf | 861bbc80 | 2009-07-17 13:51:43 +0200 | [diff] [blame] | 47 | int ret = 0; |
| 48 | struct kvm_sregs sregs; |
| 49 | |
| 50 | sregs.pvr = cenv->spr[SPR_PVR]; |
| 51 | ret = kvm_vcpu_ioctl(cenv, KVM_SET_SREGS, &sregs); |
| 52 | |
| 53 | return ret; |
aurel32 | d76d165 | 2008-12-16 10:43:58 +0000 | [diff] [blame] | 54 | } |
| 55 | |
| 56 | int kvm_arch_put_registers(CPUState *env) |
| 57 | { |
| 58 | struct kvm_regs regs; |
| 59 | int ret; |
| 60 | int i; |
| 61 | |
| 62 | ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); |
| 63 | if (ret < 0) |
| 64 | return ret; |
| 65 | |
| 66 | regs.ctr = env->ctr; |
| 67 | regs.lr = env->lr; |
| 68 | regs.xer = env->xer; |
| 69 | regs.msr = env->msr; |
| 70 | regs.pc = env->nip; |
| 71 | |
| 72 | regs.srr0 = env->spr[SPR_SRR0]; |
| 73 | regs.srr1 = env->spr[SPR_SRR1]; |
| 74 | |
| 75 | regs.sprg0 = env->spr[SPR_SPRG0]; |
| 76 | regs.sprg1 = env->spr[SPR_SPRG1]; |
| 77 | regs.sprg2 = env->spr[SPR_SPRG2]; |
| 78 | regs.sprg3 = env->spr[SPR_SPRG3]; |
| 79 | regs.sprg4 = env->spr[SPR_SPRG4]; |
| 80 | regs.sprg5 = env->spr[SPR_SPRG5]; |
| 81 | regs.sprg6 = env->spr[SPR_SPRG6]; |
| 82 | regs.sprg7 = env->spr[SPR_SPRG7]; |
| 83 | |
| 84 | for (i = 0;i < 32; i++) |
| 85 | regs.gpr[i] = env->gpr[i]; |
| 86 | |
| 87 | ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, ®s); |
| 88 | if (ret < 0) |
| 89 | return ret; |
| 90 | |
| 91 | return ret; |
| 92 | } |
| 93 | |
| 94 | int kvm_arch_get_registers(CPUState *env) |
| 95 | { |
| 96 | struct kvm_regs regs; |
| 97 | uint32_t i, ret; |
| 98 | |
| 99 | ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); |
| 100 | if (ret < 0) |
| 101 | return ret; |
| 102 | |
| 103 | env->ctr = regs.ctr; |
| 104 | env->lr = regs.lr; |
| 105 | env->xer = regs.xer; |
| 106 | env->msr = regs.msr; |
| 107 | env->nip = regs.pc; |
| 108 | |
| 109 | env->spr[SPR_SRR0] = regs.srr0; |
| 110 | env->spr[SPR_SRR1] = regs.srr1; |
| 111 | |
| 112 | env->spr[SPR_SPRG0] = regs.sprg0; |
| 113 | env->spr[SPR_SPRG1] = regs.sprg1; |
| 114 | env->spr[SPR_SPRG2] = regs.sprg2; |
| 115 | env->spr[SPR_SPRG3] = regs.sprg3; |
| 116 | env->spr[SPR_SPRG4] = regs.sprg4; |
| 117 | env->spr[SPR_SPRG5] = regs.sprg5; |
| 118 | env->spr[SPR_SPRG6] = regs.sprg6; |
| 119 | env->spr[SPR_SPRG7] = regs.sprg7; |
| 120 | |
| 121 | for (i = 0;i < 32; i++) |
| 122 | env->gpr[i] = regs.gpr[i]; |
| 123 | |
| 124 | return 0; |
| 125 | } |
| 126 | |
Alexander Graf | 1641533 | 2009-07-17 13:51:46 +0200 | [diff] [blame] | 127 | #if defined(TARGET_PPCEMB) |
| 128 | #define PPC_INPUT_INT PPC40x_INPUT_INT |
| 129 | #elif defined(TARGET_PPC64) |
| 130 | #define PPC_INPUT_INT PPC970_INPUT_INT |
| 131 | #else |
| 132 | #define PPC_INPUT_INT PPC6xx_INPUT_INT |
| 133 | #endif |
| 134 | |
aurel32 | d76d165 | 2008-12-16 10:43:58 +0000 | [diff] [blame] | 135 | int kvm_arch_pre_run(CPUState *env, struct kvm_run *run) |
| 136 | { |
| 137 | int r; |
| 138 | unsigned irq; |
| 139 | |
| 140 | /* PowerPC Qemu tracks the various core input pins (interrupt, critical |
| 141 | * interrupt, reset, etc) in PPC-specific env->irq_input_state. */ |
| 142 | if (run->ready_for_interrupt_injection && |
| 143 | (env->interrupt_request & CPU_INTERRUPT_HARD) && |
Alexander Graf | 1641533 | 2009-07-17 13:51:46 +0200 | [diff] [blame] | 144 | (env->irq_input_state & (1<<PPC_INPUT_INT))) |
aurel32 | d76d165 | 2008-12-16 10:43:58 +0000 | [diff] [blame] | 145 | { |
| 146 | /* For now KVM disregards the 'irq' argument. However, in the |
| 147 | * future KVM could cache it in-kernel to avoid a heavyweight exit |
| 148 | * when reading the UIC. |
| 149 | */ |
| 150 | irq = -1U; |
| 151 | |
| 152 | dprintf("injected interrupt %d\n", irq); |
| 153 | r = kvm_vcpu_ioctl(env, KVM_INTERRUPT, &irq); |
| 154 | if (r < 0) |
| 155 | printf("cpu %d fail inject %x\n", env->cpu_index, irq); |
| 156 | } |
| 157 | |
| 158 | /* We don't know if there are more interrupts pending after this. However, |
| 159 | * the guest will return to userspace in the course of handling this one |
| 160 | * anyways, so we will get a chance to deliver the rest. */ |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | int kvm_arch_post_run(CPUState *env, struct kvm_run *run) |
| 165 | { |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | static int kvmppc_handle_halt(CPUState *env) |
| 170 | { |
| 171 | if (!(env->interrupt_request & CPU_INTERRUPT_HARD) && (msr_ee)) { |
| 172 | env->halted = 1; |
| 173 | env->exception_index = EXCP_HLT; |
| 174 | } |
| 175 | |
| 176 | return 1; |
| 177 | } |
| 178 | |
| 179 | /* map dcr access to existing qemu dcr emulation */ |
| 180 | static int kvmppc_handle_dcr_read(CPUState *env, uint32_t dcrn, uint32_t *data) |
| 181 | { |
| 182 | if (ppc_dcr_read(env->dcr_env, dcrn, data) < 0) |
| 183 | fprintf(stderr, "Read to unhandled DCR (0x%x)\n", dcrn); |
| 184 | |
| 185 | return 1; |
| 186 | } |
| 187 | |
| 188 | static int kvmppc_handle_dcr_write(CPUState *env, uint32_t dcrn, uint32_t data) |
| 189 | { |
| 190 | if (ppc_dcr_write(env->dcr_env, dcrn, data) < 0) |
| 191 | fprintf(stderr, "Write to unhandled DCR (0x%x)\n", dcrn); |
| 192 | |
| 193 | return 1; |
| 194 | } |
| 195 | |
| 196 | int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run) |
| 197 | { |
| 198 | int ret = 0; |
| 199 | |
| 200 | switch (run->exit_reason) { |
| 201 | case KVM_EXIT_DCR: |
| 202 | if (run->dcr.is_write) { |
| 203 | dprintf("handle dcr write\n"); |
| 204 | ret = kvmppc_handle_dcr_write(env, run->dcr.dcrn, run->dcr.data); |
| 205 | } else { |
| 206 | dprintf("handle dcr read\n"); |
| 207 | ret = kvmppc_handle_dcr_read(env, run->dcr.dcrn, &run->dcr.data); |
| 208 | } |
| 209 | break; |
| 210 | case KVM_EXIT_HLT: |
| 211 | dprintf("handle halt\n"); |
| 212 | ret = kvmppc_handle_halt(env); |
| 213 | break; |
| 214 | } |
| 215 | |
| 216 | return ret; |
| 217 | } |
| 218 | |