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Diffstat (limited to 'target-ppc/kvm.c')
| -rw-r--r-- | target-ppc/kvm.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c new file mode 100644 index 000000000..acbb1abd2 --- /dev/null +++ b/target-ppc/kvm.c @@ -0,0 +1,204 @@ +/* + * PowerPC implementation of KVM hooks + * + * Copyright IBM Corp. 2007 + * + * Authors: + * Jerone Young <jyoung5@us.ibm.com> + * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> + * Hollis Blanchard <hollisb@us.ibm.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include <sys/types.h> +#include <sys/ioctl.h> +#include <sys/mman.h> + +#include <linux/kvm.h> + +#include "qemu-common.h" +#include "qemu-timer.h" +#include "sysemu.h" +#include "kvm.h" +#include "kvm_ppc.h" +#include "cpu.h" +#include "device_tree.h" + +//#define DEBUG_KVM + +#ifdef DEBUG_KVM +#define dprintf(fmt, ...) \ + do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) +#else +#define dprintf(fmt, ...) \ + do { } while (0) +#endif + +int kvm_arch_init(KVMState *s, int smp_cpus) +{ + return 0; +} + +int kvm_arch_init_vcpu(CPUState *cenv) +{ + return 0; +} + +int kvm_arch_put_registers(CPUState *env) +{ + struct kvm_regs regs; + int ret; + int i; + + ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); + if (ret < 0) + return ret; + + regs.ctr = env->ctr; + regs.lr = env->lr; + regs.xer = env->xer; + regs.msr = env->msr; + regs.pc = env->nip; + + regs.srr0 = env->spr[SPR_SRR0]; + regs.srr1 = env->spr[SPR_SRR1]; + + regs.sprg0 = env->spr[SPR_SPRG0]; + regs.sprg1 = env->spr[SPR_SPRG1]; + regs.sprg2 = env->spr[SPR_SPRG2]; + regs.sprg3 = env->spr[SPR_SPRG3]; + regs.sprg4 = env->spr[SPR_SPRG4]; + regs.sprg5 = env->spr[SPR_SPRG5]; + regs.sprg6 = env->spr[SPR_SPRG6]; + regs.sprg7 = env->spr[SPR_SPRG7]; + + for (i = 0;i < 32; i++) + regs.gpr[i] = env->gpr[i]; + + ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, ®s); + if (ret < 0) + return ret; + + return ret; +} + +int kvm_arch_get_registers(CPUState *env) +{ + struct kvm_regs regs; + uint32_t i, ret; + + ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); + if (ret < 0) + return ret; + + env->ctr = regs.ctr; + env->lr = regs.lr; + env->xer = regs.xer; + env->msr = regs.msr; + env->nip = regs.pc; + + env->spr[SPR_SRR0] = regs.srr0; + env->spr[SPR_SRR1] = regs.srr1; + + env->spr[SPR_SPRG0] = regs.sprg0; + env->spr[SPR_SPRG1] = regs.sprg1; + env->spr[SPR_SPRG2] = regs.sprg2; + env->spr[SPR_SPRG3] = regs.sprg3; + env->spr[SPR_SPRG4] = regs.sprg4; + env->spr[SPR_SPRG5] = regs.sprg5; + env->spr[SPR_SPRG6] = regs.sprg6; + env->spr[SPR_SPRG7] = regs.sprg7; + + for (i = 0;i < 32; i++) + env->gpr[i] = regs.gpr[i]; + + return 0; +} + +int kvm_arch_pre_run(CPUState *env, struct kvm_run *run) +{ + int r; + unsigned irq; + + /* PowerPC Qemu tracks the various core input pins (interrupt, critical + * interrupt, reset, etc) in PPC-specific env->irq_input_state. */ + if (run->ready_for_interrupt_injection && + (env->interrupt_request & CPU_INTERRUPT_HARD) && + (env->irq_input_state & (1<<PPC40x_INPUT_INT))) + { + /* For now KVM disregards the 'irq' argument. However, in the + * future KVM could cache it in-kernel to avoid a heavyweight exit + * when reading the UIC. + */ + irq = -1U; + + dprintf("injected interrupt %d\n", irq); + r = kvm_vcpu_ioctl(env, KVM_INTERRUPT, &irq); + if (r < 0) + printf("cpu %d fail inject %x\n", env->cpu_index, irq); + } + + /* We don't know if there are more interrupts pending after this. However, + * the guest will return to userspace in the course of handling this one + * anyways, so we will get a chance to deliver the rest. */ + return 0; +} + +int kvm_arch_post_run(CPUState *env, struct kvm_run *run) +{ + return 0; +} + +static int kvmppc_handle_halt(CPUState *env) +{ + if (!(env->interrupt_request & CPU_INTERRUPT_HARD) && (msr_ee)) { + env->halted = 1; + env->exception_index = EXCP_HLT; + } + + return 1; +} + +/* map dcr access to existing qemu dcr emulation */ +static int kvmppc_handle_dcr_read(CPUState *env, uint32_t dcrn, uint32_t *data) +{ + if (ppc_dcr_read(env->dcr_env, dcrn, data) < 0) + fprintf(stderr, "Read to unhandled DCR (0x%x)\n", dcrn); + + return 1; +} + +static int kvmppc_handle_dcr_write(CPUState *env, uint32_t dcrn, uint32_t data) +{ + if (ppc_dcr_write(env->dcr_env, dcrn, data) < 0) + fprintf(stderr, "Write to unhandled DCR (0x%x)\n", dcrn); + + return 1; +} + +int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run) +{ + int ret = 0; + + switch (run->exit_reason) { + case KVM_EXIT_DCR: + if (run->dcr.is_write) { + dprintf("handle dcr write\n"); + ret = kvmppc_handle_dcr_write(env, run->dcr.dcrn, run->dcr.data); + } else { + dprintf("handle dcr read\n"); + ret = kvmppc_handle_dcr_read(env, run->dcr.dcrn, &run->dcr.data); + } + break; + case KVM_EXIT_HLT: + dprintf("handle halt\n"); + ret = kvmppc_handle_halt(env); + break; + } + + return ret; +} + |