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1.1 root 1: /*
2: * PowerPC implementation of KVM hooks
3: *
4: * Copyright IBM Corp. 2007
5: *
6: * Authors:
7: * Jerone Young <[email protected]>
8: * Christian Ehrhardt <[email protected]>
9: * Hollis Blanchard <[email protected]>
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: {
47: return 0;
48: }
49:
50: int kvm_arch_put_registers(CPUState *env)
51: {
52: struct kvm_regs regs;
53: int ret;
54: int i;
55:
56: ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s);
57: if (ret < 0)
58: return ret;
59:
60: regs.ctr = env->ctr;
61: regs.lr = env->lr;
62: regs.xer = env->xer;
63: regs.msr = env->msr;
64: regs.pc = env->nip;
65:
66: regs.srr0 = env->spr[SPR_SRR0];
67: regs.srr1 = env->spr[SPR_SRR1];
68:
69: regs.sprg0 = env->spr[SPR_SPRG0];
70: regs.sprg1 = env->spr[SPR_SPRG1];
71: regs.sprg2 = env->spr[SPR_SPRG2];
72: regs.sprg3 = env->spr[SPR_SPRG3];
73: regs.sprg4 = env->spr[SPR_SPRG4];
74: regs.sprg5 = env->spr[SPR_SPRG5];
75: regs.sprg6 = env->spr[SPR_SPRG6];
76: regs.sprg7 = env->spr[SPR_SPRG7];
77:
78: for (i = 0;i < 32; i++)
79: regs.gpr[i] = env->gpr[i];
80:
81: ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, ®s);
82: if (ret < 0)
83: return ret;
84:
85: return ret;
86: }
87:
88: int kvm_arch_get_registers(CPUState *env)
89: {
90: struct kvm_regs regs;
91: uint32_t i, ret;
92:
93: ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s);
94: if (ret < 0)
95: return ret;
96:
97: env->ctr = regs.ctr;
98: env->lr = regs.lr;
99: env->xer = regs.xer;
100: env->msr = regs.msr;
101: env->nip = regs.pc;
102:
103: env->spr[SPR_SRR0] = regs.srr0;
104: env->spr[SPR_SRR1] = regs.srr1;
105:
106: env->spr[SPR_SPRG0] = regs.sprg0;
107: env->spr[SPR_SPRG1] = regs.sprg1;
108: env->spr[SPR_SPRG2] = regs.sprg2;
109: env->spr[SPR_SPRG3] = regs.sprg3;
110: env->spr[SPR_SPRG4] = regs.sprg4;
111: env->spr[SPR_SPRG5] = regs.sprg5;
112: env->spr[SPR_SPRG6] = regs.sprg6;
113: env->spr[SPR_SPRG7] = regs.sprg7;
114:
115: for (i = 0;i < 32; i++)
116: env->gpr[i] = regs.gpr[i];
117:
118: return 0;
119: }
120:
121: int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
122: {
123: int r;
124: unsigned irq;
125:
126: /* PowerPC Qemu tracks the various core input pins (interrupt, critical
127: * interrupt, reset, etc) in PPC-specific env->irq_input_state. */
128: if (run->ready_for_interrupt_injection &&
129: (env->interrupt_request & CPU_INTERRUPT_HARD) &&
130: (env->irq_input_state & (1<<PPC40x_INPUT_INT)))
131: {
132: /* For now KVM disregards the 'irq' argument. However, in the
133: * future KVM could cache it in-kernel to avoid a heavyweight exit
134: * when reading the UIC.
135: */
136: irq = -1U;
137:
138: dprintf("injected interrupt %d\n", irq);
139: r = kvm_vcpu_ioctl(env, KVM_INTERRUPT, &irq);
140: if (r < 0)
141: printf("cpu %d fail inject %x\n", env->cpu_index, irq);
142: }
143:
144: /* We don't know if there are more interrupts pending after this. However,
145: * the guest will return to userspace in the course of handling this one
146: * anyways, so we will get a chance to deliver the rest. */
147: return 0;
148: }
149:
150: int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
151: {
152: return 0;
153: }
154:
155: static int kvmppc_handle_halt(CPUState *env)
156: {
157: if (!(env->interrupt_request & CPU_INTERRUPT_HARD) && (msr_ee)) {
158: env->halted = 1;
159: env->exception_index = EXCP_HLT;
160: }
161:
162: return 1;
163: }
164:
165: /* map dcr access to existing qemu dcr emulation */
166: static int kvmppc_handle_dcr_read(CPUState *env, uint32_t dcrn, uint32_t *data)
167: {
168: if (ppc_dcr_read(env->dcr_env, dcrn, data) < 0)
169: fprintf(stderr, "Read to unhandled DCR (0x%x)\n", dcrn);
170:
171: return 1;
172: }
173:
174: static int kvmppc_handle_dcr_write(CPUState *env, uint32_t dcrn, uint32_t data)
175: {
176: if (ppc_dcr_write(env->dcr_env, dcrn, data) < 0)
177: fprintf(stderr, "Write to unhandled DCR (0x%x)\n", dcrn);
178:
179: return 1;
180: }
181:
182: int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run)
183: {
184: int ret = 0;
185:
186: switch (run->exit_reason) {
187: case KVM_EXIT_DCR:
188: if (run->dcr.is_write) {
189: dprintf("handle dcr write\n");
190: ret = kvmppc_handle_dcr_write(env, run->dcr.dcrn, run->dcr.data);
191: } else {
192: dprintf("handle dcr read\n");
193: ret = kvmppc_handle_dcr_read(env, run->dcr.dcrn, &run->dcr.data);
194: }
195: break;
196: case KVM_EXIT_HLT:
197: dprintf("handle halt\n");
198: ret = kvmppc_handle_halt(env);
199: break;
200: }
201:
202: return ret;
203: }
204:
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