KVM: PPC: Remove DCR handling
DCR handling was only needed for 440 KVM. Since we removed it, we can also remove handling of DCR accesses. Signed-off-by: Alexander Graf <agraf@suse.de>
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@ -2613,8 +2613,8 @@ The 'data' member contains, in its first 'len' bytes, the value as it would
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appear if the VCPU performed a load or store of the appropriate width directly
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to the byte array.
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NOTE: For KVM_EXIT_IO, KVM_EXIT_MMIO, KVM_EXIT_OSI, KVM_EXIT_DCR,
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KVM_EXIT_PAPR and KVM_EXIT_EPR the corresponding
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NOTE: For KVM_EXIT_IO, KVM_EXIT_MMIO, KVM_EXIT_OSI KVM_EXIT_PAPR and
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KVM_EXIT_EPR the corresponding
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operations are complete (and guest state is consistent) only after userspace
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has re-entered the kernel with KVM_RUN. The kernel side will first finish
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incomplete operations and then check for pending signals. Userspace
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@ -2685,7 +2685,7 @@ Principles of Operation Book in the Chapter for Dynamic Address Translation
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__u8 is_write;
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} dcr;
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powerpc specific.
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Deprecated - was used for 440 KVM.
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/* KVM_EXIT_OSI */
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struct {
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@ -94,7 +94,6 @@ struct kvm_vm_stat {
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struct kvm_vcpu_stat {
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u32 sum_exits;
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u32 mmio_exits;
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u32 dcr_exits;
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u32 signal_exits;
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u32 light_exits;
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/* Account for special types of light exits: */
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@ -126,7 +125,6 @@ struct kvm_vcpu_stat {
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enum kvm_exit_types {
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MMIO_EXITS,
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DCR_EXITS,
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SIGNAL_EXITS,
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ITLB_REAL_MISS_EXITS,
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ITLB_VIRT_MISS_EXITS,
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@ -601,8 +599,6 @@ struct kvm_vcpu_arch {
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u8 io_gpr; /* GPR used as IO source/target */
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u8 mmio_is_bigendian;
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u8 mmio_sign_extend;
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u8 dcr_needed;
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u8 dcr_is_write;
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u8 osi_needed;
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u8 osi_enabled;
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u8 papr_enabled;
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@ -41,7 +41,6 @@
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enum emulation_result {
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EMULATE_DONE, /* no further processing */
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EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */
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EMULATE_DO_DCR, /* kvm_run filled with DCR request */
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EMULATE_FAIL, /* can't emulate this instruction */
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EMULATE_AGAIN, /* something went wrong. go again */
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EMULATE_EXIT_USER, /* emulation requires exit to user-space */
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@ -51,7 +51,6 @@ unsigned long kvmppc_booke_handlers;
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struct kvm_stats_debugfs_item debugfs_entries[] = {
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{ "mmio", VCPU_STAT(mmio_exits) },
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{ "dcr", VCPU_STAT(dcr_exits) },
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{ "sig", VCPU_STAT(signal_exits) },
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{ "itlb_r", VCPU_STAT(itlb_real_miss_exits) },
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{ "itlb_v", VCPU_STAT(itlb_virt_miss_exits) },
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@ -709,10 +708,6 @@ static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
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case EMULATE_AGAIN:
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return RESUME_GUEST;
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case EMULATE_DO_DCR:
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run->exit_reason = KVM_EXIT_DCR;
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return RESUME_HOST;
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case EMULATE_FAIL:
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printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
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__func__, vcpu->arch.pc, vcpu->arch.last_inst);
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@ -743,12 +743,6 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
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#endif
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}
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static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
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struct kvm_run *run)
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{
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kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
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}
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static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
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struct kvm_run *run)
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{
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@ -945,10 +939,6 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
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if (!vcpu->mmio_is_write)
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kvmppc_complete_mmio_load(vcpu, run);
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vcpu->mmio_needed = 0;
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} else if (vcpu->arch.dcr_needed) {
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if (!vcpu->arch.dcr_is_write)
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kvmppc_complete_dcr_load(vcpu, run);
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vcpu->arch.dcr_needed = 0;
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} else if (vcpu->arch.osi_needed) {
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u64 *gprs = run->osi.gprs;
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int i;
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@ -110,7 +110,6 @@ void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu)
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static const char *kvm_exit_names[__NUMBER_OF_KVM_EXIT_TYPES] = {
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[MMIO_EXITS] = "MMIO",
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[DCR_EXITS] = "DCR",
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[SIGNAL_EXITS] = "SIGNAL",
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[ITLB_REAL_MISS_EXITS] = "ITLBREAL",
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[ITLB_VIRT_MISS_EXITS] = "ITLBVIRT",
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@ -63,9 +63,6 @@ static inline void kvmppc_account_exit_stat(struct kvm_vcpu *vcpu, int type)
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case EMULATED_INST_EXITS:
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vcpu->stat.emulated_inst_exits++;
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break;
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case DCR_EXITS:
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vcpu->stat.dcr_exits++;
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break;
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case DSI_EXITS:
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vcpu->stat.dsi_exits++;
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break;
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@ -162,7 +162,7 @@ struct kvm_pit_config {
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#define KVM_EXIT_TPR_ACCESS 12
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#define KVM_EXIT_S390_SIEIC 13
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#define KVM_EXIT_S390_RESET 14
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#define KVM_EXIT_DCR 15
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#define KVM_EXIT_DCR 15 /* deprecated */
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#define KVM_EXIT_NMI 16
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#define KVM_EXIT_INTERNAL_ERROR 17
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#define KVM_EXIT_OSI 18
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@ -268,7 +268,7 @@ struct kvm_run {
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__u64 trans_exc_code;
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__u32 pgm_code;
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} s390_ucontrol;
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/* KVM_EXIT_DCR */
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/* KVM_EXIT_DCR (deprecated) */
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struct {
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__u32 dcrn;
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__u32 data;
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