253 lines
7.0 KiB
C
253 lines
7.0 KiB
C
/*
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* Copyright (C) 2011. Freescale Inc. All rights reserved.
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*
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* Authors:
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* Alexander Graf <agraf@suse.de>
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* Paul Mackerras <paulus@samba.org>
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*
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* Description:
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*
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* Hypercall handling for running PAPR guests in PR KVM on Book 3S
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* processors.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*/
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#include <linux/anon_inodes.h>
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#include <asm/uaccess.h>
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#include <asm/kvm_ppc.h>
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#include <asm/kvm_book3s.h>
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static unsigned long get_pteg_addr(struct kvm_vcpu *vcpu, long pte_index)
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{
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struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
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unsigned long pteg_addr;
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pte_index <<= 4;
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pte_index &= ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1) << 7 | 0x70;
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pteg_addr = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL;
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pteg_addr |= pte_index;
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return pteg_addr;
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}
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static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu)
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{
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long flags = kvmppc_get_gpr(vcpu, 4);
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long pte_index = kvmppc_get_gpr(vcpu, 5);
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unsigned long pteg[2 * 8];
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unsigned long pteg_addr, i, *hpte;
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pte_index &= ~7UL;
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pteg_addr = get_pteg_addr(vcpu, pte_index);
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copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg));
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hpte = pteg;
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if (likely((flags & H_EXACT) == 0)) {
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pte_index &= ~7UL;
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for (i = 0; ; ++i) {
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if (i == 8)
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return H_PTEG_FULL;
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if ((*hpte & HPTE_V_VALID) == 0)
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break;
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hpte += 2;
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}
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} else {
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i = kvmppc_get_gpr(vcpu, 5) & 7UL;
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hpte += i * 2;
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}
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hpte[0] = kvmppc_get_gpr(vcpu, 6);
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hpte[1] = kvmppc_get_gpr(vcpu, 7);
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copy_to_user((void __user *)pteg_addr, pteg, sizeof(pteg));
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kvmppc_set_gpr(vcpu, 3, H_SUCCESS);
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kvmppc_set_gpr(vcpu, 4, pte_index | i);
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return EMULATE_DONE;
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}
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static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu)
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{
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unsigned long flags= kvmppc_get_gpr(vcpu, 4);
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unsigned long pte_index = kvmppc_get_gpr(vcpu, 5);
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unsigned long avpn = kvmppc_get_gpr(vcpu, 6);
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unsigned long v = 0, pteg, rb;
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unsigned long pte[2];
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pteg = get_pteg_addr(vcpu, pte_index);
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copy_from_user(pte, (void __user *)pteg, sizeof(pte));
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if ((pte[0] & HPTE_V_VALID) == 0 ||
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((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn) ||
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((flags & H_ANDCOND) && (pte[0] & avpn) != 0)) {
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kvmppc_set_gpr(vcpu, 3, H_NOT_FOUND);
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return EMULATE_DONE;
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}
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copy_to_user((void __user *)pteg, &v, sizeof(v));
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rb = compute_tlbie_rb(pte[0], pte[1], pte_index);
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vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
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kvmppc_set_gpr(vcpu, 3, H_SUCCESS);
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kvmppc_set_gpr(vcpu, 4, pte[0]);
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kvmppc_set_gpr(vcpu, 5, pte[1]);
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return EMULATE_DONE;
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}
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/* Request defs for kvmppc_h_pr_bulk_remove() */
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#define H_BULK_REMOVE_TYPE 0xc000000000000000ULL
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#define H_BULK_REMOVE_REQUEST 0x4000000000000000ULL
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#define H_BULK_REMOVE_RESPONSE 0x8000000000000000ULL
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#define H_BULK_REMOVE_END 0xc000000000000000ULL
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#define H_BULK_REMOVE_CODE 0x3000000000000000ULL
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#define H_BULK_REMOVE_SUCCESS 0x0000000000000000ULL
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#define H_BULK_REMOVE_NOT_FOUND 0x1000000000000000ULL
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#define H_BULK_REMOVE_PARM 0x2000000000000000ULL
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#define H_BULK_REMOVE_HW 0x3000000000000000ULL
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#define H_BULK_REMOVE_RC 0x0c00000000000000ULL
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#define H_BULK_REMOVE_FLAGS 0x0300000000000000ULL
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#define H_BULK_REMOVE_ABSOLUTE 0x0000000000000000ULL
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#define H_BULK_REMOVE_ANDCOND 0x0100000000000000ULL
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#define H_BULK_REMOVE_AVPN 0x0200000000000000ULL
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#define H_BULK_REMOVE_PTEX 0x00ffffffffffffffULL
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#define H_BULK_REMOVE_MAX_BATCH 4
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static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu)
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{
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int i;
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int paramnr = 4;
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int ret = H_SUCCESS;
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for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) {
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unsigned long tsh = kvmppc_get_gpr(vcpu, paramnr+(2*i));
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unsigned long tsl = kvmppc_get_gpr(vcpu, paramnr+(2*i)+1);
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unsigned long pteg, rb, flags;
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unsigned long pte[2];
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unsigned long v = 0;
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if ((tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) {
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break; /* Exit success */
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} else if ((tsh & H_BULK_REMOVE_TYPE) !=
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H_BULK_REMOVE_REQUEST) {
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ret = H_PARAMETER;
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break; /* Exit fail */
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}
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tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS;
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tsh |= H_BULK_REMOVE_RESPONSE;
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if ((tsh & H_BULK_REMOVE_ANDCOND) &&
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(tsh & H_BULK_REMOVE_AVPN)) {
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tsh |= H_BULK_REMOVE_PARM;
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kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh);
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ret = H_PARAMETER;
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break; /* Exit fail */
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}
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pteg = get_pteg_addr(vcpu, tsh & H_BULK_REMOVE_PTEX);
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copy_from_user(pte, (void __user *)pteg, sizeof(pte));
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/* tsl = AVPN */
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flags = (tsh & H_BULK_REMOVE_FLAGS) >> 26;
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if ((pte[0] & HPTE_V_VALID) == 0 ||
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((flags & H_AVPN) && (pte[0] & ~0x7fUL) != tsl) ||
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((flags & H_ANDCOND) && (pte[0] & tsl) != 0)) {
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tsh |= H_BULK_REMOVE_NOT_FOUND;
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} else {
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/* Splat the pteg in (userland) hpt */
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copy_to_user((void __user *)pteg, &v, sizeof(v));
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rb = compute_tlbie_rb(pte[0], pte[1],
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tsh & H_BULK_REMOVE_PTEX);
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vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
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tsh |= H_BULK_REMOVE_SUCCESS;
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tsh |= (pte[1] & (HPTE_R_C | HPTE_R_R)) << 43;
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}
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kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh);
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}
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kvmppc_set_gpr(vcpu, 3, ret);
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return EMULATE_DONE;
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}
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static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu)
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{
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unsigned long flags = kvmppc_get_gpr(vcpu, 4);
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unsigned long pte_index = kvmppc_get_gpr(vcpu, 5);
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unsigned long avpn = kvmppc_get_gpr(vcpu, 6);
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unsigned long rb, pteg, r, v;
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unsigned long pte[2];
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pteg = get_pteg_addr(vcpu, pte_index);
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copy_from_user(pte, (void __user *)pteg, sizeof(pte));
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if ((pte[0] & HPTE_V_VALID) == 0 ||
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((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn)) {
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kvmppc_set_gpr(vcpu, 3, H_NOT_FOUND);
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return EMULATE_DONE;
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}
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v = pte[0];
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r = pte[1];
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r &= ~(HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_HI |
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HPTE_R_KEY_LO);
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r |= (flags << 55) & HPTE_R_PP0;
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r |= (flags << 48) & HPTE_R_KEY_HI;
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r |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO);
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pte[1] = r;
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rb = compute_tlbie_rb(v, r, pte_index);
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vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
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copy_to_user((void __user *)pteg, pte, sizeof(pte));
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kvmppc_set_gpr(vcpu, 3, H_SUCCESS);
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return EMULATE_DONE;
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}
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static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu)
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{
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unsigned long liobn = kvmppc_get_gpr(vcpu, 4);
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unsigned long ioba = kvmppc_get_gpr(vcpu, 5);
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unsigned long tce = kvmppc_get_gpr(vcpu, 6);
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long rc;
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rc = kvmppc_h_put_tce(vcpu, liobn, ioba, tce);
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if (rc == H_TOO_HARD)
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return EMULATE_FAIL;
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kvmppc_set_gpr(vcpu, 3, rc);
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return EMULATE_DONE;
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}
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int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd)
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{
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switch (cmd) {
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case H_ENTER:
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return kvmppc_h_pr_enter(vcpu);
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case H_REMOVE:
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return kvmppc_h_pr_remove(vcpu);
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case H_PROTECT:
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return kvmppc_h_pr_protect(vcpu);
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case H_BULK_REMOVE:
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return kvmppc_h_pr_bulk_remove(vcpu);
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case H_PUT_TCE:
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return kvmppc_h_pr_put_tce(vcpu);
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case H_CEDE:
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vcpu->arch.shared->msr |= MSR_EE;
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kvm_vcpu_block(vcpu);
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clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
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vcpu->stat.halt_wakeup++;
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return EMULATE_DONE;
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}
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return EMULATE_FAIL;
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}
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