| /* |
| * Copyright (C) 2011. Freescale Inc. All rights reserved. |
| * |
| * Authors: |
| * Alexander Graf <agraf@suse.de> |
| * Paul Mackerras <paulus@samba.org> |
| * |
| * Description: |
| * |
| * Hypercall handling for running PAPR guests in PR KVM on Book 3S |
| * processors. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License, version 2, as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/anon_inodes.h> |
| |
| #include <asm/uaccess.h> |
| #include <asm/kvm_ppc.h> |
| #include <asm/kvm_book3s.h> |
| |
| #define HPTE_SIZE 16 /* bytes per HPT entry */ |
| |
| static unsigned long get_pteg_addr(struct kvm_vcpu *vcpu, long pte_index) |
| { |
| struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu); |
| unsigned long pteg_addr; |
| |
| pte_index <<= 4; |
| pte_index &= ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1) << 7 | 0x70; |
| pteg_addr = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL; |
| pteg_addr |= pte_index; |
| |
| return pteg_addr; |
| } |
| |
| static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu) |
| { |
| long flags = kvmppc_get_gpr(vcpu, 4); |
| long pte_index = kvmppc_get_gpr(vcpu, 5); |
| __be64 pteg[2 * 8]; |
| __be64 *hpte; |
| unsigned long pteg_addr, i; |
| long int ret; |
| |
| i = pte_index & 7; |
| pte_index &= ~7UL; |
| pteg_addr = get_pteg_addr(vcpu, pte_index); |
| |
| mutex_lock(&vcpu->kvm->arch.hpt_mutex); |
| copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg)); |
| hpte = pteg; |
| |
| ret = H_PTEG_FULL; |
| if (likely((flags & H_EXACT) == 0)) { |
| for (i = 0; ; ++i) { |
| if (i == 8) |
| goto done; |
| if ((be64_to_cpu(*hpte) & HPTE_V_VALID) == 0) |
| break; |
| hpte += 2; |
| } |
| } else { |
| hpte += i * 2; |
| if (*hpte & HPTE_V_VALID) |
| goto done; |
| } |
| |
| hpte[0] = cpu_to_be64(kvmppc_get_gpr(vcpu, 6)); |
| hpte[1] = cpu_to_be64(kvmppc_get_gpr(vcpu, 7)); |
| pteg_addr += i * HPTE_SIZE; |
| copy_to_user((void __user *)pteg_addr, hpte, HPTE_SIZE); |
| kvmppc_set_gpr(vcpu, 4, pte_index | i); |
| ret = H_SUCCESS; |
| |
| done: |
| mutex_unlock(&vcpu->kvm->arch.hpt_mutex); |
| kvmppc_set_gpr(vcpu, 3, ret); |
| |
| return EMULATE_DONE; |
| } |
| |
| static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu) |
| { |
| unsigned long flags= kvmppc_get_gpr(vcpu, 4); |
| unsigned long pte_index = kvmppc_get_gpr(vcpu, 5); |
| unsigned long avpn = kvmppc_get_gpr(vcpu, 6); |
| unsigned long v = 0, pteg, rb; |
| unsigned long pte[2]; |
| long int ret; |
| |
| pteg = get_pteg_addr(vcpu, pte_index); |
| mutex_lock(&vcpu->kvm->arch.hpt_mutex); |
| copy_from_user(pte, (void __user *)pteg, sizeof(pte)); |
| pte[0] = be64_to_cpu((__force __be64)pte[0]); |
| pte[1] = be64_to_cpu((__force __be64)pte[1]); |
| |
| ret = H_NOT_FOUND; |
| if ((pte[0] & HPTE_V_VALID) == 0 || |
| ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn) || |
| ((flags & H_ANDCOND) && (pte[0] & avpn) != 0)) |
| goto done; |
| |
| copy_to_user((void __user *)pteg, &v, sizeof(v)); |
| |
| rb = compute_tlbie_rb(pte[0], pte[1], pte_index); |
| vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false); |
| |
| ret = H_SUCCESS; |
| kvmppc_set_gpr(vcpu, 4, pte[0]); |
| kvmppc_set_gpr(vcpu, 5, pte[1]); |
| |
| done: |
| mutex_unlock(&vcpu->kvm->arch.hpt_mutex); |
| kvmppc_set_gpr(vcpu, 3, ret); |
| |
| return EMULATE_DONE; |
| } |
| |
| /* Request defs for kvmppc_h_pr_bulk_remove() */ |
| #define H_BULK_REMOVE_TYPE 0xc000000000000000ULL |
| #define H_BULK_REMOVE_REQUEST 0x4000000000000000ULL |
| #define H_BULK_REMOVE_RESPONSE 0x8000000000000000ULL |
| #define H_BULK_REMOVE_END 0xc000000000000000ULL |
| #define H_BULK_REMOVE_CODE 0x3000000000000000ULL |
| #define H_BULK_REMOVE_SUCCESS 0x0000000000000000ULL |
| #define H_BULK_REMOVE_NOT_FOUND 0x1000000000000000ULL |
| #define H_BULK_REMOVE_PARM 0x2000000000000000ULL |
| #define H_BULK_REMOVE_HW 0x3000000000000000ULL |
| #define H_BULK_REMOVE_RC 0x0c00000000000000ULL |
| #define H_BULK_REMOVE_FLAGS 0x0300000000000000ULL |
| #define H_BULK_REMOVE_ABSOLUTE 0x0000000000000000ULL |
| #define H_BULK_REMOVE_ANDCOND 0x0100000000000000ULL |
| #define H_BULK_REMOVE_AVPN 0x0200000000000000ULL |
| #define H_BULK_REMOVE_PTEX 0x00ffffffffffffffULL |
| #define H_BULK_REMOVE_MAX_BATCH 4 |
| |
| static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu) |
| { |
| int i; |
| int paramnr = 4; |
| int ret = H_SUCCESS; |
| |
| mutex_lock(&vcpu->kvm->arch.hpt_mutex); |
| for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) { |
| unsigned long tsh = kvmppc_get_gpr(vcpu, paramnr+(2*i)); |
| unsigned long tsl = kvmppc_get_gpr(vcpu, paramnr+(2*i)+1); |
| unsigned long pteg, rb, flags; |
| unsigned long pte[2]; |
| unsigned long v = 0; |
| |
| if ((tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) { |
| break; /* Exit success */ |
| } else if ((tsh & H_BULK_REMOVE_TYPE) != |
| H_BULK_REMOVE_REQUEST) { |
| ret = H_PARAMETER; |
| break; /* Exit fail */ |
| } |
| |
| tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS; |
| tsh |= H_BULK_REMOVE_RESPONSE; |
| |
| if ((tsh & H_BULK_REMOVE_ANDCOND) && |
| (tsh & H_BULK_REMOVE_AVPN)) { |
| tsh |= H_BULK_REMOVE_PARM; |
| kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh); |
| ret = H_PARAMETER; |
| break; /* Exit fail */ |
| } |
| |
| pteg = get_pteg_addr(vcpu, tsh & H_BULK_REMOVE_PTEX); |
| copy_from_user(pte, (void __user *)pteg, sizeof(pte)); |
| pte[0] = be64_to_cpu((__force __be64)pte[0]); |
| pte[1] = be64_to_cpu((__force __be64)pte[1]); |
| |
| /* tsl = AVPN */ |
| flags = (tsh & H_BULK_REMOVE_FLAGS) >> 26; |
| |
| if ((pte[0] & HPTE_V_VALID) == 0 || |
| ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != tsl) || |
| ((flags & H_ANDCOND) && (pte[0] & tsl) != 0)) { |
| tsh |= H_BULK_REMOVE_NOT_FOUND; |
| } else { |
| /* Splat the pteg in (userland) hpt */ |
| copy_to_user((void __user *)pteg, &v, sizeof(v)); |
| |
| rb = compute_tlbie_rb(pte[0], pte[1], |
| tsh & H_BULK_REMOVE_PTEX); |
| vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false); |
| tsh |= H_BULK_REMOVE_SUCCESS; |
| tsh |= (pte[1] & (HPTE_R_C | HPTE_R_R)) << 43; |
| } |
| kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh); |
| } |
| mutex_unlock(&vcpu->kvm->arch.hpt_mutex); |
| kvmppc_set_gpr(vcpu, 3, ret); |
| |
| return EMULATE_DONE; |
| } |
| |
| static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu) |
| { |
| unsigned long flags = kvmppc_get_gpr(vcpu, 4); |
| unsigned long pte_index = kvmppc_get_gpr(vcpu, 5); |
| unsigned long avpn = kvmppc_get_gpr(vcpu, 6); |
| unsigned long rb, pteg, r, v; |
| unsigned long pte[2]; |
| long int ret; |
| |
| pteg = get_pteg_addr(vcpu, pte_index); |
| mutex_lock(&vcpu->kvm->arch.hpt_mutex); |
| copy_from_user(pte, (void __user *)pteg, sizeof(pte)); |
| pte[0] = be64_to_cpu((__force __be64)pte[0]); |
| pte[1] = be64_to_cpu((__force __be64)pte[1]); |
| |
| ret = H_NOT_FOUND; |
| if ((pte[0] & HPTE_V_VALID) == 0 || |
| ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn)) |
| goto done; |
| |
| v = pte[0]; |
| r = pte[1]; |
| r &= ~(HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_HI | |
| HPTE_R_KEY_LO); |
| r |= (flags << 55) & HPTE_R_PP0; |
| r |= (flags << 48) & HPTE_R_KEY_HI; |
| r |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO); |
| |
| pte[1] = r; |
| |
| rb = compute_tlbie_rb(v, r, pte_index); |
| vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false); |
| pte[0] = (__force u64)cpu_to_be64(pte[0]); |
| pte[1] = (__force u64)cpu_to_be64(pte[1]); |
| copy_to_user((void __user *)pteg, pte, sizeof(pte)); |
| ret = H_SUCCESS; |
| |
| done: |
| mutex_unlock(&vcpu->kvm->arch.hpt_mutex); |
| kvmppc_set_gpr(vcpu, 3, ret); |
| |
| return EMULATE_DONE; |
| } |
| |
| static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu) |
| { |
| unsigned long liobn = kvmppc_get_gpr(vcpu, 4); |
| unsigned long ioba = kvmppc_get_gpr(vcpu, 5); |
| unsigned long tce = kvmppc_get_gpr(vcpu, 6); |
| long rc; |
| |
| rc = kvmppc_h_put_tce(vcpu, liobn, ioba, tce); |
| if (rc == H_TOO_HARD) |
| return EMULATE_FAIL; |
| kvmppc_set_gpr(vcpu, 3, rc); |
| return EMULATE_DONE; |
| } |
| |
| static int kvmppc_h_pr_logical_ci_load(struct kvm_vcpu *vcpu) |
| { |
| long rc; |
| |
| rc = kvmppc_h_logical_ci_load(vcpu); |
| if (rc == H_TOO_HARD) |
| return EMULATE_FAIL; |
| kvmppc_set_gpr(vcpu, 3, rc); |
| return EMULATE_DONE; |
| } |
| |
| static int kvmppc_h_pr_logical_ci_store(struct kvm_vcpu *vcpu) |
| { |
| long rc; |
| |
| rc = kvmppc_h_logical_ci_store(vcpu); |
| if (rc == H_TOO_HARD) |
| return EMULATE_FAIL; |
| kvmppc_set_gpr(vcpu, 3, rc); |
| return EMULATE_DONE; |
| } |
| |
| static int kvmppc_h_pr_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd) |
| { |
| long rc = kvmppc_xics_hcall(vcpu, cmd); |
| kvmppc_set_gpr(vcpu, 3, rc); |
| return EMULATE_DONE; |
| } |
| |
| int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd) |
| { |
| int rc, idx; |
| |
| if (cmd <= MAX_HCALL_OPCODE && |
| !test_bit(cmd/4, vcpu->kvm->arch.enabled_hcalls)) |
| return EMULATE_FAIL; |
| |
| switch (cmd) { |
| case H_ENTER: |
| return kvmppc_h_pr_enter(vcpu); |
| case H_REMOVE: |
| return kvmppc_h_pr_remove(vcpu); |
| case H_PROTECT: |
| return kvmppc_h_pr_protect(vcpu); |
| case H_BULK_REMOVE: |
| return kvmppc_h_pr_bulk_remove(vcpu); |
| case H_PUT_TCE: |
| return kvmppc_h_pr_put_tce(vcpu); |
| case H_CEDE: |
| kvmppc_set_msr_fast(vcpu, kvmppc_get_msr(vcpu) | MSR_EE); |
| kvm_vcpu_block(vcpu); |
| clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
| vcpu->stat.halt_wakeup++; |
| return EMULATE_DONE; |
| case H_LOGICAL_CI_LOAD: |
| return kvmppc_h_pr_logical_ci_load(vcpu); |
| case H_LOGICAL_CI_STORE: |
| return kvmppc_h_pr_logical_ci_store(vcpu); |
| case H_XIRR: |
| case H_CPPR: |
| case H_EOI: |
| case H_IPI: |
| case H_IPOLL: |
| case H_XIRR_X: |
| if (kvmppc_xics_enabled(vcpu)) |
| return kvmppc_h_pr_xics_hcall(vcpu, cmd); |
| break; |
| case H_RTAS: |
| if (list_empty(&vcpu->kvm->arch.rtas_tokens)) |
| break; |
| idx = srcu_read_lock(&vcpu->kvm->srcu); |
| rc = kvmppc_rtas_hcall(vcpu); |
| srcu_read_unlock(&vcpu->kvm->srcu, idx); |
| if (rc) |
| break; |
| kvmppc_set_gpr(vcpu, 3, 0); |
| return EMULATE_DONE; |
| } |
| |
| return EMULATE_FAIL; |
| } |
| |
| int kvmppc_hcall_impl_pr(unsigned long cmd) |
| { |
| switch (cmd) { |
| case H_ENTER: |
| case H_REMOVE: |
| case H_PROTECT: |
| case H_BULK_REMOVE: |
| case H_PUT_TCE: |
| case H_CEDE: |
| case H_LOGICAL_CI_LOAD: |
| case H_LOGICAL_CI_STORE: |
| #ifdef CONFIG_KVM_XICS |
| case H_XIRR: |
| case H_CPPR: |
| case H_EOI: |
| case H_IPI: |
| case H_IPOLL: |
| case H_XIRR_X: |
| #endif |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* |
| * List of hcall numbers to enable by default. |
| * For compatibility with old userspace, we enable by default |
| * all hcalls that were implemented before the hcall-enabling |
| * facility was added. Note this list should not include H_RTAS. |
| */ |
| static unsigned int default_hcall_list[] = { |
| H_ENTER, |
| H_REMOVE, |
| H_PROTECT, |
| H_BULK_REMOVE, |
| H_PUT_TCE, |
| H_CEDE, |
| #ifdef CONFIG_KVM_XICS |
| H_XIRR, |
| H_CPPR, |
| H_EOI, |
| H_IPI, |
| H_IPOLL, |
| H_XIRR_X, |
| #endif |
| 0 |
| }; |
| |
| void kvmppc_pr_init_default_hcalls(struct kvm *kvm) |
| { |
| int i; |
| unsigned int hcall; |
| |
| for (i = 0; default_hcall_list[i]; ++i) { |
| hcall = default_hcall_list[i]; |
| WARN_ON(!kvmppc_hcall_impl_pr(hcall)); |
| __set_bit(hcall / 4, kvm->arch.enabled_hcalls); |
| } |
| } |
