// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2023 Jordan Niethe, IBM Corp. * * Authors: * Jordan Niethe * * Description: KVM functions specific to running on Book 3S * processors as a NESTEDv2 guest. * */ #include "linux/blk-mq.h" #include "linux/console.h" #include "linux/gfp_types.h" #include "linux/signal.h" #include #include #include #include #include #include #include #include #include #include #include "trace_hv.h" struct static_key_false __kvmhv_is_nestedv2 __read_mostly; EXPORT_SYMBOL_GPL(__kvmhv_is_nestedv2); static size_t gs_msg_ops_kvmhv_nestedv2_config_get_size(struct kvmppc_gs_msg *gsm) { u16 ids[] = { KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE, KVMPPC_GSID_RUN_INPUT, KVMPPC_GSID_RUN_OUTPUT, }; size_t size = 0; for (int i = 0; i < ARRAY_SIZE(ids); i++) size += kvmppc_gse_total_size(kvmppc_gsid_size(ids[i])); return size; } static int gs_msg_ops_kvmhv_nestedv2_config_fill_info(struct kvmppc_gs_buff *gsb, struct kvmppc_gs_msg *gsm) { struct kvmhv_nestedv2_config *cfg; int rc; cfg = gsm->data; if (kvmppc_gsm_includes(gsm, KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE)) { rc = kvmppc_gse_put_u64(gsb, KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE, cfg->vcpu_run_output_size); if (rc < 0) return rc; } if (kvmppc_gsm_includes(gsm, KVMPPC_GSID_RUN_INPUT)) { rc = kvmppc_gse_put_buff_info(gsb, KVMPPC_GSID_RUN_INPUT, cfg->vcpu_run_input_cfg); if (rc < 0) return rc; } if (kvmppc_gsm_includes(gsm, KVMPPC_GSID_RUN_OUTPUT)) { rc = kvmppc_gse_put_buff_info(gsb, KVMPPC_GSID_RUN_OUTPUT, cfg->vcpu_run_output_cfg); if (rc < 0) return rc; } return 0; } static int gs_msg_ops_kvmhv_nestedv2_config_refresh_info(struct kvmppc_gs_msg *gsm, struct kvmppc_gs_buff *gsb) { struct kvmhv_nestedv2_config *cfg; struct kvmppc_gs_parser gsp = { 0 }; struct kvmppc_gs_elem *gse; int rc; cfg = gsm->data; rc = kvmppc_gse_parse(&gsp, gsb); if (rc < 0) return rc; gse = kvmppc_gsp_lookup(&gsp, KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE); if (gse) cfg->vcpu_run_output_size = kvmppc_gse_get_u64(gse); return 0; } static struct kvmppc_gs_msg_ops config_msg_ops = { .get_size = gs_msg_ops_kvmhv_nestedv2_config_get_size, .fill_info = gs_msg_ops_kvmhv_nestedv2_config_fill_info, .refresh_info = gs_msg_ops_kvmhv_nestedv2_config_refresh_info, }; static size_t gs_msg_ops_vcpu_get_size(struct kvmppc_gs_msg *gsm) { struct kvmppc_gs_bitmap gsbm = { 0 }; size_t size = 0; u16 iden; kvmppc_gsbm_fill(&gsbm); kvmppc_gsbm_for_each(&gsbm, iden) { switch (iden) { case KVMPPC_GSID_HOST_STATE_SIZE: case KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE: case KVMPPC_GSID_PARTITION_TABLE: case KVMPPC_GSID_PROCESS_TABLE: case KVMPPC_GSID_RUN_INPUT: case KVMPPC_GSID_RUN_OUTPUT: break; default: size += kvmppc_gse_total_size(kvmppc_gsid_size(iden)); } } return size; } static int gs_msg_ops_vcpu_fill_info(struct kvmppc_gs_buff *gsb, struct kvmppc_gs_msg *gsm) { struct kvm_vcpu *vcpu; vector128 v; int rc, i; u16 iden; u32 arch_compat = 0; vcpu = gsm->data; kvmppc_gsm_for_each(gsm, iden) { rc = 0; if ((gsm->flags & KVMPPC_GS_FLAGS_WIDE) != (kvmppc_gsid_flags(iden) & KVMPPC_GS_FLAGS_WIDE)) continue; switch (iden) { case KVMPPC_GSID_DSCR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dscr); break; case KVMPPC_GSID_MMCRA: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.mmcra); break; case KVMPPC_GSID_HFSCR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.hfscr); break; case KVMPPC_GSID_PURR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.purr); break; case KVMPPC_GSID_SPURR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.spurr); break; case KVMPPC_GSID_AMR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.amr); break; case KVMPPC_GSID_UAMOR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.uamor); break; case KVMPPC_GSID_SIAR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.siar); break; case KVMPPC_GSID_SDAR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.sdar); break; case KVMPPC_GSID_IAMR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.iamr); break; case KVMPPC_GSID_DAWR0: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dawr0); break; case KVMPPC_GSID_DAWR1: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dawr1); break; case KVMPPC_GSID_DAWRX0: rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.dawrx0); break; case KVMPPC_GSID_DAWRX1: rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.dawrx1); break; case KVMPPC_GSID_DEXCR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dexcr); break; case KVMPPC_GSID_HASHKEYR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.hashkeyr); break; case KVMPPC_GSID_HASHPKEYR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.hashpkeyr); break; case KVMPPC_GSID_CIABR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ciabr); break; case KVMPPC_GSID_WORT: rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.wort); break; case KVMPPC_GSID_PPR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ppr); break; case KVMPPC_GSID_PSPB: rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.pspb); break; case KVMPPC_GSID_TAR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.tar); break; case KVMPPC_GSID_FSCR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.fscr); break; case KVMPPC_GSID_EBBHR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ebbhr); break; case KVMPPC_GSID_EBBRR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ebbrr); break; case KVMPPC_GSID_BESCR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.bescr); break; case KVMPPC_GSID_IC: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ic); break; case KVMPPC_GSID_CTRL: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ctrl); break; case KVMPPC_GSID_PIDR: rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.pid); break; case KVMPPC_GSID_AMOR: { u64 amor = ~0; rc = kvmppc_gse_put_u64(gsb, iden, amor); break; } case KVMPPC_GSID_VRSAVE: rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.vrsave); break; case KVMPPC_GSID_MMCR(0)... KVMPPC_GSID_MMCR(3): i = iden - KVMPPC_GSID_MMCR(0); rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.mmcr[i]); break; case KVMPPC_GSID_SIER(0)... KVMPPC_GSID_SIER(2): i = iden - KVMPPC_GSID_SIER(0); rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.sier[i]); break; case KVMPPC_GSID_PMC(0)... KVMPPC_GSID_PMC(5): i = iden - KVMPPC_GSID_PMC(0); rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.pmc[i]); break; case KVMPPC_GSID_GPR(0)... KVMPPC_GSID_GPR(31): i = iden - KVMPPC_GSID_GPR(0); rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.regs.gpr[i]); break; case KVMPPC_GSID_CR: rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.regs.ccr); break; case KVMPPC_GSID_XER: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.regs.xer); break; case KVMPPC_GSID_CTR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.regs.ctr); break; case KVMPPC_GSID_LR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.regs.link); break; case KVMPPC_GSID_NIA: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.regs.nip); break; case KVMPPC_GSID_SRR0: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.shregs.srr0); break; case KVMPPC_GSID_SRR1: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.shregs.srr1); break; case KVMPPC_GSID_SPRG0: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.shregs.sprg0); break; case KVMPPC_GSID_SPRG1: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.shregs.sprg1); break; case KVMPPC_GSID_SPRG2: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.shregs.sprg2); break; case KVMPPC_GSID_SPRG3: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.shregs.sprg3); break; case KVMPPC_GSID_DAR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.shregs.dar); break; case KVMPPC_GSID_DSISR: rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.shregs.dsisr); break; case KVMPPC_GSID_MSR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.shregs.msr); break; case KVMPPC_GSID_VTB: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.vcore->vtb); break; case KVMPPC_GSID_DPDES: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.vcore->dpdes); break; case KVMPPC_GSID_LPCR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.vcore->lpcr); break; case KVMPPC_GSID_TB_OFFSET: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.vcore->tb_offset); break; case KVMPPC_GSID_FPSCR: rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.fp.fpscr); break; case KVMPPC_GSID_VSRS(0)... KVMPPC_GSID_VSRS(31): i = iden - KVMPPC_GSID_VSRS(0); memcpy(&v, &vcpu->arch.fp.fpr[i], sizeof(vcpu->arch.fp.fpr[i])); rc = kvmppc_gse_put_vector128(gsb, iden, &v); break; #ifdef CONFIG_VSX case KVMPPC_GSID_VSCR: rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.vr.vscr.u[3]); break; case KVMPPC_GSID_VSRS(32)... KVMPPC_GSID_VSRS(63): i = iden - KVMPPC_GSID_VSRS(32); rc = kvmppc_gse_put_vector128(gsb, iden, &vcpu->arch.vr.vr[i]); break; #endif case KVMPPC_GSID_DEC_EXPIRY_TB: { u64 dw; dw = vcpu->arch.dec_expires - vcpu->arch.vcore->tb_offset; rc = kvmppc_gse_put_u64(gsb, iden, dw); break; } case KVMPPC_GSID_LOGICAL_PVR: /* * Though 'arch_compat == 0' would mean the default * compatibility, arch_compat, being a Guest Wide * Element, cannot be filled with a value of 0 in GSB * as this would result into a kernel trap. * Hence, when `arch_compat == 0`, arch_compat should * default to L1's PVR. */ if (!vcpu->arch.vcore->arch_compat) { if (cpu_has_feature(CPU_FTR_P11_PVR)) arch_compat = PVR_ARCH_31_P11; else if (cpu_has_feature(CPU_FTR_ARCH_31)) arch_compat = PVR_ARCH_31; else if (cpu_has_feature(CPU_FTR_ARCH_300)) arch_compat = PVR_ARCH_300; } else { arch_compat = vcpu->arch.vcore->arch_compat; } rc = kvmppc_gse_put_u32(gsb, iden, arch_compat); break; } if (rc < 0) return rc; } return 0; } static int gs_msg_ops_vcpu_refresh_info(struct kvmppc_gs_msg *gsm, struct kvmppc_gs_buff *gsb) { struct kvmppc_gs_parser gsp = { 0 }; struct kvmhv_nestedv2_io *io; struct kvmppc_gs_bitmap *valids; struct kvm_vcpu *vcpu; struct kvmppc_gs_elem *gse; vector128 v; int rc, i; u16 iden; vcpu = gsm->data; rc = kvmppc_gse_parse(&gsp, gsb); if (rc < 0) return rc; io = &vcpu->arch.nestedv2_io; valids = &io->valids; kvmppc_gsp_for_each(&gsp, iden, gse) { switch (iden) { case KVMPPC_GSID_DSCR: vcpu->arch.dscr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_MMCRA: vcpu->arch.mmcra = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_HFSCR: vcpu->arch.hfscr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_PURR: vcpu->arch.purr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_SPURR: vcpu->arch.spurr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_AMR: vcpu->arch.amr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_UAMOR: vcpu->arch.uamor = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_SIAR: vcpu->arch.siar = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_SDAR: vcpu->arch.sdar = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_IAMR: vcpu->arch.iamr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_DAWR0: vcpu->arch.dawr0 = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_DAWR1: vcpu->arch.dawr1 = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_DAWRX0: vcpu->arch.dawrx0 = kvmppc_gse_get_u32(gse); break; case KVMPPC_GSID_DAWRX1: vcpu->arch.dawrx1 = kvmppc_gse_get_u32(gse); break; case KVMPPC_GSID_DEXCR: vcpu->arch.dexcr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_HASHKEYR: vcpu->arch.hashkeyr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_HASHPKEYR: vcpu->arch.hashpkeyr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_CIABR: vcpu->arch.ciabr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_WORT: vcpu->arch.wort = kvmppc_gse_get_u32(gse); break; case KVMPPC_GSID_PPR: vcpu->arch.ppr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_PSPB: vcpu->arch.pspb = kvmppc_gse_get_u32(gse); break; case KVMPPC_GSID_TAR: vcpu->arch.tar = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_FSCR: vcpu->arch.fscr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_EBBHR: vcpu->arch.ebbhr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_EBBRR: vcpu->arch.ebbrr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_BESCR: vcpu->arch.bescr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_IC: vcpu->arch.ic = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_CTRL: vcpu->arch.ctrl = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_PIDR: vcpu->arch.pid = kvmppc_gse_get_u32(gse); break; case KVMPPC_GSID_AMOR: break; case KVMPPC_GSID_VRSAVE: vcpu->arch.vrsave = kvmppc_gse_get_u32(gse); break; case KVMPPC_GSID_MMCR(0)... KVMPPC_GSID_MMCR(3): i = iden - KVMPPC_GSID_MMCR(0); vcpu->arch.mmcr[i] = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_SIER(0)... KVMPPC_GSID_SIER(2): i = iden - KVMPPC_GSID_SIER(0); vcpu->arch.sier[i] = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_PMC(0)... KVMPPC_GSID_PMC(5): i = iden - KVMPPC_GSID_PMC(0); vcpu->arch.pmc[i] = kvmppc_gse_get_u32(gse); break; case KVMPPC_GSID_GPR(0)... KVMPPC_GSID_GPR(31): i = iden - KVMPPC_GSID_GPR(0); vcpu->arch.regs.gpr[i] = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_CR: vcpu->arch.regs.ccr = kvmppc_gse_get_u32(gse); break; case KVMPPC_GSID_XER: vcpu->arch.regs.xer = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_CTR: vcpu->arch.regs.ctr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_LR: vcpu->arch.regs.link = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_NIA: vcpu->arch.regs.nip = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_SRR0: vcpu->arch.shregs.srr0 = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_SRR1: vcpu->arch.shregs.srr1 = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_SPRG0: vcpu->arch.shregs.sprg0 = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_SPRG1: vcpu->arch.shregs.sprg1 = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_SPRG2: vcpu->arch.shregs.sprg2 = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_SPRG3: vcpu->arch.shregs.sprg3 = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_DAR: vcpu->arch.shregs.dar = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_DSISR: vcpu->arch.shregs.dsisr = kvmppc_gse_get_u32(gse); break; case KVMPPC_GSID_MSR: vcpu->arch.shregs.msr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_VTB: vcpu->arch.vcore->vtb = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_DPDES: vcpu->arch.vcore->dpdes = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_LPCR: vcpu->arch.vcore->lpcr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_TB_OFFSET: vcpu->arch.vcore->tb_offset = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_FPSCR: vcpu->arch.fp.fpscr = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_VSRS(0)... KVMPPC_GSID_VSRS(31): kvmppc_gse_get_vector128(gse, &v); i = iden - KVMPPC_GSID_VSRS(0); memcpy(&vcpu->arch.fp.fpr[i], &v, sizeof(vcpu->arch.fp.fpr[i])); break; #ifdef CONFIG_VSX case KVMPPC_GSID_VSCR: vcpu->arch.vr.vscr.u[3] = kvmppc_gse_get_u32(gse); break; case KVMPPC_GSID_VSRS(32)... KVMPPC_GSID_VSRS(63): i = iden - KVMPPC_GSID_VSRS(32); kvmppc_gse_get_vector128(gse, &vcpu->arch.vr.vr[i]); break; #endif case KVMPPC_GSID_HDAR: vcpu->arch.fault_dar = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_HDSISR: vcpu->arch.fault_dsisr = kvmppc_gse_get_u32(gse); break; case KVMPPC_GSID_ASDR: vcpu->arch.fault_gpa = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_HEIR: vcpu->arch.emul_inst = kvmppc_gse_get_u64(gse); break; case KVMPPC_GSID_DEC_EXPIRY_TB: { u64 dw; dw = kvmppc_gse_get_u64(gse); vcpu->arch.dec_expires = dw + vcpu->arch.vcore->tb_offset; break; } case KVMPPC_GSID_LOGICAL_PVR: vcpu->arch.vcore->arch_compat = kvmppc_gse_get_u32(gse); break; default: continue; } kvmppc_gsbm_set(valids, iden); } return 0; } static struct kvmppc_gs_msg_ops vcpu_message_ops = { .get_size = gs_msg_ops_vcpu_get_size, .fill_info = gs_msg_ops_vcpu_fill_info, .refresh_info = gs_msg_ops_vcpu_refresh_info, }; static int kvmhv_nestedv2_host_create(struct kvm_vcpu *vcpu, struct kvmhv_nestedv2_io *io) { struct kvmhv_nestedv2_config *cfg; struct kvmppc_gs_buff *gsb, *vcpu_run_output, *vcpu_run_input; unsigned long guest_id, vcpu_id; struct kvmppc_gs_msg *gsm, *vcpu_message, *vcore_message; int rc; cfg = &io->cfg; guest_id = vcpu->kvm->arch.lpid; vcpu_id = vcpu->vcpu_id; gsm = kvmppc_gsm_new(&config_msg_ops, cfg, KVMPPC_GS_FLAGS_WIDE, GFP_KERNEL); if (!gsm) { rc = -ENOMEM; goto err; } gsb = kvmppc_gsb_new(kvmppc_gsm_size(gsm), guest_id, vcpu_id, GFP_KERNEL); if (!gsb) { rc = -ENOMEM; goto free_gsm; } rc = kvmppc_gsb_receive_datum(gsb, gsm, KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE); if (rc < 0) { pr_err("KVM-NESTEDv2: couldn't get vcpu run output buffer minimum size\n"); goto free_gsb; } vcpu_run_output = kvmppc_gsb_new(cfg->vcpu_run_output_size, guest_id, vcpu_id, GFP_KERNEL); if (!vcpu_run_output) { rc = -ENOMEM; goto free_gsb; } cfg->vcpu_run_output_cfg.address = kvmppc_gsb_paddress(vcpu_run_output); cfg->vcpu_run_output_cfg.size = kvmppc_gsb_capacity(vcpu_run_output); io->vcpu_run_output = vcpu_run_output; gsm->flags = 0; rc = kvmppc_gsb_send_datum(gsb, gsm, KVMPPC_GSID_RUN_OUTPUT); if (rc < 0) { pr_err("KVM-NESTEDv2: couldn't set vcpu run output buffer\n"); goto free_gs_out; } vcpu_message = kvmppc_gsm_new(&vcpu_message_ops, vcpu, 0, GFP_KERNEL); if (!vcpu_message) { rc = -ENOMEM; goto free_gs_out; } kvmppc_gsm_include_all(vcpu_message); io->vcpu_message = vcpu_message; vcpu_run_input = kvmppc_gsb_new(kvmppc_gsm_size(vcpu_message), guest_id, vcpu_id, GFP_KERNEL); if (!vcpu_run_input) { rc = -ENOMEM; goto free_vcpu_message; } io->vcpu_run_input = vcpu_run_input; cfg->vcpu_run_input_cfg.address = kvmppc_gsb_paddress(vcpu_run_input); cfg->vcpu_run_input_cfg.size = kvmppc_gsb_capacity(vcpu_run_input); rc = kvmppc_gsb_send_datum(gsb, gsm, KVMPPC_GSID_RUN_INPUT); if (rc < 0) { pr_err("KVM-NESTEDv2: couldn't set vcpu run input buffer\n"); goto free_vcpu_run_input; } vcore_message = kvmppc_gsm_new(&vcpu_message_ops, vcpu, KVMPPC_GS_FLAGS_WIDE, GFP_KERNEL); if (!vcore_message) { rc = -ENOMEM; goto free_vcpu_run_input; } kvmppc_gsm_include_all(vcore_message); kvmppc_gsbm_clear(&vcore_message->bitmap, KVMPPC_GSID_LOGICAL_PVR); io->vcore_message = vcore_message; kvmppc_gsbm_fill(&io->valids); kvmppc_gsm_free(gsm); kvmppc_gsb_free(gsb); return 0; free_vcpu_run_input: kvmppc_gsb_free(vcpu_run_input); free_vcpu_message: kvmppc_gsm_free(vcpu_message); free_gs_out: kvmppc_gsb_free(vcpu_run_output); free_gsb: kvmppc_gsb_free(gsb); free_gsm: kvmppc_gsm_free(gsm); err: return rc; } /** * __kvmhv_nestedv2_mark_dirty() - mark a Guest State ID to be sent to the host * @vcpu: vcpu * @iden: guest state ID * * Mark a guest state ID as having been changed by the L1 host and thus * the new value must be sent to the L0 hypervisor. See kvmhv_nestedv2_flush_vcpu() */ int __kvmhv_nestedv2_mark_dirty(struct kvm_vcpu *vcpu, u16 iden) { struct kvmhv_nestedv2_io *io; struct kvmppc_gs_bitmap *valids; struct kvmppc_gs_msg *gsm; if (!iden) return 0; io = &vcpu->arch.nestedv2_io; valids = &io->valids; gsm = io->vcpu_message; kvmppc_gsm_include(gsm, iden); gsm = io->vcore_message; kvmppc_gsm_include(gsm, iden); kvmppc_gsbm_set(valids, iden); return 0; } EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_mark_dirty); /** * __kvmhv_nestedv2_cached_reload() - reload a Guest State ID from the host * @vcpu: vcpu * @iden: guest state ID * * Reload the value for the guest state ID from the L0 host into the L1 host. * This is cached so that going out to the L0 host only happens if necessary. */ int __kvmhv_nestedv2_cached_reload(struct kvm_vcpu *vcpu, u16 iden) { struct kvmhv_nestedv2_io *io; struct kvmppc_gs_bitmap *valids; struct kvmppc_gs_buff *gsb; struct kvmppc_gs_msg gsm; int rc; if (!iden) return 0; io = &vcpu->arch.nestedv2_io; valids = &io->valids; if (kvmppc_gsbm_test(valids, iden)) return 0; gsb = io->vcpu_run_input; kvmppc_gsm_init(&gsm, &vcpu_message_ops, vcpu, kvmppc_gsid_flags(iden)); rc = kvmppc_gsb_receive_datum(gsb, &gsm, iden); if (rc < 0) { pr_err("KVM-NESTEDv2: couldn't get GSID: 0x%x\n", iden); return rc; } return 0; } EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_cached_reload); /** * kvmhv_nestedv2_flush_vcpu() - send modified Guest State IDs to the host * @vcpu: vcpu * @time_limit: hdec expiry tb * * Send the values marked by __kvmhv_nestedv2_mark_dirty() to the L0 host. * Thread wide values are copied to the H_GUEST_RUN_VCPU input buffer. Guest * wide values need to be sent with H_GUEST_SET first. * * The hdec tb offset is always sent to L0 host. */ int kvmhv_nestedv2_flush_vcpu(struct kvm_vcpu *vcpu, u64 time_limit) { struct kvmhv_nestedv2_io *io; struct kvmppc_gs_buff *gsb; struct kvmppc_gs_msg *gsm; int rc; io = &vcpu->arch.nestedv2_io; gsb = io->vcpu_run_input; gsm = io->vcore_message; rc = kvmppc_gsb_send_data(gsb, gsm); if (rc < 0) { pr_err("KVM-NESTEDv2: couldn't set guest wide elements\n"); return rc; } gsm = io->vcpu_message; kvmppc_gsb_reset(gsb); rc = kvmppc_gsm_fill_info(gsm, gsb); if (rc < 0) { pr_err("KVM-NESTEDv2: couldn't fill vcpu run input buffer\n"); return rc; } rc = kvmppc_gse_put_u64(gsb, KVMPPC_GSID_HDEC_EXPIRY_TB, time_limit); if (rc < 0) return rc; return 0; } EXPORT_SYMBOL_GPL(kvmhv_nestedv2_flush_vcpu); /** * kvmhv_nestedv2_set_ptbl_entry() - send partition and process table state to * L0 host * @lpid: guest id * @dw0: partition table double word * @dw1: process table double word */ int kvmhv_nestedv2_set_ptbl_entry(unsigned long lpid, u64 dw0, u64 dw1) { struct kvmppc_gs_part_table patbl; struct kvmppc_gs_proc_table prtbl; struct kvmppc_gs_buff *gsb; size_t size; int rc; size = kvmppc_gse_total_size( kvmppc_gsid_size(KVMPPC_GSID_PARTITION_TABLE)) + kvmppc_gse_total_size( kvmppc_gsid_size(KVMPPC_GSID_PROCESS_TABLE)) + sizeof(struct kvmppc_gs_header); gsb = kvmppc_gsb_new(size, lpid, 0, GFP_KERNEL); if (!gsb) return -ENOMEM; patbl.address = dw0 & RPDB_MASK; patbl.ea_bits = ((((dw0 & RTS1_MASK) >> (RTS1_SHIFT - 3)) | ((dw0 & RTS2_MASK) >> RTS2_SHIFT)) + 31); patbl.gpd_size = 1ul << ((dw0 & RPDS_MASK) + 3); rc = kvmppc_gse_put_part_table(gsb, KVMPPC_GSID_PARTITION_TABLE, patbl); if (rc < 0) goto free_gsb; prtbl.address = dw1 & PRTB_MASK; prtbl.gpd_size = 1ul << ((dw1 & PRTS_MASK) + 12); rc = kvmppc_gse_put_proc_table(gsb, KVMPPC_GSID_PROCESS_TABLE, prtbl); if (rc < 0) goto free_gsb; rc = kvmppc_gsb_send(gsb, KVMPPC_GS_FLAGS_WIDE); if (rc < 0) { pr_err("KVM-NESTEDv2: couldn't set the PATE\n"); goto free_gsb; } kvmppc_gsb_free(gsb); return 0; free_gsb: kvmppc_gsb_free(gsb); return rc; } EXPORT_SYMBOL_GPL(kvmhv_nestedv2_set_ptbl_entry); /** * kvmhv_nestedv2_set_vpa() - register L2 VPA with L0 * @vcpu: vcpu * @vpa: L1 logical real address */ int kvmhv_nestedv2_set_vpa(struct kvm_vcpu *vcpu, unsigned long vpa) { struct kvmhv_nestedv2_io *io; struct kvmppc_gs_buff *gsb; int rc = 0; io = &vcpu->arch.nestedv2_io; gsb = io->vcpu_run_input; kvmppc_gsb_reset(gsb); rc = kvmppc_gse_put_u64(gsb, KVMPPC_GSID_VPA, vpa); if (rc < 0) goto out; rc = kvmppc_gsb_send(gsb, 0); if (rc < 0) pr_err("KVM-NESTEDv2: couldn't register the L2 VPA (rc=%d)\n", rc); out: kvmppc_gsb_reset(gsb); return rc; } EXPORT_SYMBOL_GPL(kvmhv_nestedv2_set_vpa); /** * kvmhv_nestedv2_parse_output() - receive values from H_GUEST_RUN_VCPU output * @vcpu: vcpu * * Parse the output buffer from H_GUEST_RUN_VCPU to update vcpu. */ int kvmhv_nestedv2_parse_output(struct kvm_vcpu *vcpu) { struct kvmhv_nestedv2_io *io; struct kvmppc_gs_buff *gsb; struct kvmppc_gs_msg gsm; io = &vcpu->arch.nestedv2_io; gsb = io->vcpu_run_output; vcpu->arch.fault_dar = 0; vcpu->arch.fault_dsisr = 0; vcpu->arch.fault_gpa = 0; vcpu->arch.emul_inst = KVM_INST_FETCH_FAILED; kvmppc_gsm_init(&gsm, &vcpu_message_ops, vcpu, 0); return kvmppc_gsm_refresh_info(&gsm, gsb); } EXPORT_SYMBOL_GPL(kvmhv_nestedv2_parse_output); static void kvmhv_nestedv2_host_free(struct kvm_vcpu *vcpu, struct kvmhv_nestedv2_io *io) { kvmppc_gsm_free(io->vcpu_message); kvmppc_gsm_free(io->vcore_message); kvmppc_gsb_free(io->vcpu_run_input); kvmppc_gsb_free(io->vcpu_run_output); } int __kvmhv_nestedv2_reload_ptregs(struct kvm_vcpu *vcpu, struct pt_regs *regs) { struct kvmhv_nestedv2_io *io; struct kvmppc_gs_bitmap *valids; struct kvmppc_gs_buff *gsb; struct kvmppc_gs_msg gsm; int rc = 0; io = &vcpu->arch.nestedv2_io; valids = &io->valids; gsb = io->vcpu_run_input; kvmppc_gsm_init(&gsm, &vcpu_message_ops, vcpu, 0); for (int i = 0; i < 32; i++) { if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_GPR(i))) kvmppc_gsm_include(&gsm, KVMPPC_GSID_GPR(i)); } if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_CR)) kvmppc_gsm_include(&gsm, KVMPPC_GSID_CR); if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_XER)) kvmppc_gsm_include(&gsm, KVMPPC_GSID_XER); if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_CTR)) kvmppc_gsm_include(&gsm, KVMPPC_GSID_CTR); if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_LR)) kvmppc_gsm_include(&gsm, KVMPPC_GSID_LR); if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_NIA)) kvmppc_gsm_include(&gsm, KVMPPC_GSID_NIA); rc = kvmppc_gsb_receive_data(gsb, &gsm); if (rc < 0) pr_err("KVM-NESTEDv2: couldn't reload ptregs\n"); return rc; } EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_reload_ptregs); int __kvmhv_nestedv2_mark_dirty_ptregs(struct kvm_vcpu *vcpu, struct pt_regs *regs) { for (int i = 0; i < 32; i++) kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_GPR(i)); kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_CR); kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_XER); kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_CTR); kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_LR); kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_NIA); return 0; } EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_mark_dirty_ptregs); /** * kvmhv_nestedv2_vcpu_create() - create nested vcpu for the NESTEDv2 API * @vcpu: vcpu * @io: NESTEDv2 nested io state * * Parse the output buffer from H_GUEST_RUN_VCPU to update vcpu. */ int kvmhv_nestedv2_vcpu_create(struct kvm_vcpu *vcpu, struct kvmhv_nestedv2_io *io) { long rc; rc = plpar_guest_create_vcpu(0, vcpu->kvm->arch.lpid, vcpu->vcpu_id); if (rc != H_SUCCESS) { pr_err("KVM: Create Guest vcpu hcall failed, rc=%ld\n", rc); switch (rc) { case H_NOT_ENOUGH_RESOURCES: case H_ABORTED: return -ENOMEM; case H_AUTHORITY: return -EPERM; default: return -EINVAL; } } rc = kvmhv_nestedv2_host_create(vcpu, io); return rc; } EXPORT_SYMBOL_GPL(kvmhv_nestedv2_vcpu_create); /** * kvmhv_nestedv2_vcpu_free() - free the NESTEDv2 state * @vcpu: vcpu * @io: NESTEDv2 nested io state */ void kvmhv_nestedv2_vcpu_free(struct kvm_vcpu *vcpu, struct kvmhv_nestedv2_io *io) { kvmhv_nestedv2_host_free(vcpu, io); } EXPORT_SYMBOL_GPL(kvmhv_nestedv2_vcpu_free);