1 // SPDX-License-Identifier: GPL-2.0-only
22 #include <asm/ppc-opcode.h>
31 	pr_debug("mtDEC: %lx\n", vcpu->arch.dec);  in kvmppc_emulate_dec()
32 	hrtimer_try_to_cancel(&vcpu->arch.dec_timer);  in kvmppc_emulate_dec()
41 	if (vcpu->arch.dec == 0)  in kvmppc_emulate_dec()
46 	 * The decrementer ticks at the same rate as the timebase, so  in kvmppc_emulate_dec()
51 	dec_time = vcpu->arch.dec;  in kvmppc_emulate_dec()
53 	 * Guest timebase ticks at the same frequency as host timebase.  in kvmppc_emulate_dec()
54 	 * So use the host timebase calculations for decrementer emulation.  in kvmppc_emulate_dec()
58 	hrtimer_start(&vcpu->arch.dec_timer,  in kvmppc_emulate_dec()
60 	vcpu->arch.dec_jiffies = get_tb();  in kvmppc_emulate_dec()
65 	u64 jd = tb - vcpu->arch.dec_jiffies;  in kvmppc_get_dec()
68 	if (vcpu->arch.dec < jd)  in kvmppc_get_dec()
72 	return vcpu->arch.dec - jd;  in kvmppc_get_dec()
88 	/* XXX We need to context-switch the timebase for  in kvmppc_emulate_mtspr()
94 		vcpu->arch.dec = (u32) spr_val;  in kvmppc_emulate_mtspr()
115 		emulated = vcpu->kvm->arch.kvm_ops->emulate_mtspr(vcpu, sprn,  in kvmppc_emulate_mtspr()
141 		spr_val = vcpu->arch.pvr;  in kvmppc_emulate_mfspr()
144 		spr_val = vcpu->vcpu_id;  in kvmppc_emulate_mfspr()
147 	/* Note: mftb and TBRL/TBWL are user-accessible, so  in kvmppc_emulate_mfspr()
169 	/* Note: SPRG4-7 are user-readable, so we don't get  in kvmppc_emulate_mfspr()
176 		emulated = vcpu->kvm->arch.kvm_ops->emulate_mfspr(vcpu, sprn,  in kvmppc_emulate_mfspr()
192 /* XXX Should probably auto-generate instruction decoding for a particular core
223 					  vcpu->arch.shared->esr | ESR_PTR);  in kvmppc_emulate_instruction()
239 					vcpu->arch.shared->esr | ESR_PTR);  in kvmppc_emulate_instruction()
264 			/* Attempt core-specific emulation below. */  in kvmppc_emulate_instruction()
275 			vcpu->run->exit_reason = KVM_EXIT_DEBUG;  in kvmppc_emulate_instruction()
276 			vcpu->run->debug.arch.status = 0;  in kvmppc_emulate_instruction()
277 			vcpu->run->debug.arch.address = kvmppc_get_pc(vcpu);  in kvmppc_emulate_instruction()
290 		emulated = vcpu->kvm->arch.kvm_ops->emulate_op(vcpu, inst,  in kvmppc_emulate_instruction()