962 lines
24 KiB
C
962 lines
24 KiB
C
/*
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* Copyright (C) 2008-2013 Freescale Semiconductor, Inc. All rights reserved.
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*
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* Author: Yu Liu, yu.liu@freescale.com
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* Scott Wood, scottwood@freescale.com
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* Ashish Kalra, ashish.kalra@freescale.com
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* Varun Sethi, varun.sethi@freescale.com
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* Alexander Graf, agraf@suse.de
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*
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* Description:
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* This file is based on arch/powerpc/kvm/44x_tlb.c,
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* by Hollis Blanchard <hollisb@us.ibm.com>.
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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/kernel.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/kvm.h>
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#include <linux/kvm_host.h>
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#include <linux/highmem.h>
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#include <linux/log2.h>
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#include <linux/uaccess.h>
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#include <linux/sched.h>
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#include <linux/rwsem.h>
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#include <linux/vmalloc.h>
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#include <linux/hugetlb.h>
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#include <asm/kvm_ppc.h>
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#include "e500.h"
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#include "trace_booke.h"
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#include "timing.h"
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#include "e500_mmu_host.h"
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static inline unsigned int gtlb0_get_next_victim(
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struct kvmppc_vcpu_e500 *vcpu_e500)
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{
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unsigned int victim;
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victim = vcpu_e500->gtlb_nv[0]++;
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if (unlikely(vcpu_e500->gtlb_nv[0] >= vcpu_e500->gtlb_params[0].ways))
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vcpu_e500->gtlb_nv[0] = 0;
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return victim;
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}
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static int tlb0_set_base(gva_t addr, int sets, int ways)
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{
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int set_base;
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set_base = (addr >> PAGE_SHIFT) & (sets - 1);
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set_base *= ways;
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return set_base;
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}
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static int gtlb0_set_base(struct kvmppc_vcpu_e500 *vcpu_e500, gva_t addr)
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{
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return tlb0_set_base(addr, vcpu_e500->gtlb_params[0].sets,
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vcpu_e500->gtlb_params[0].ways);
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}
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static unsigned int get_tlb_esel(struct kvm_vcpu *vcpu, int tlbsel)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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int esel = get_tlb_esel_bit(vcpu);
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if (tlbsel == 0) {
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esel &= vcpu_e500->gtlb_params[0].ways - 1;
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esel += gtlb0_set_base(vcpu_e500, vcpu->arch.shared->mas2);
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} else {
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esel &= vcpu_e500->gtlb_params[tlbsel].entries - 1;
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}
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return esel;
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}
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/* Search the guest TLB for a matching entry. */
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static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500,
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gva_t eaddr, int tlbsel, unsigned int pid, int as)
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{
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int size = vcpu_e500->gtlb_params[tlbsel].entries;
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unsigned int set_base, offset;
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int i;
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if (tlbsel == 0) {
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set_base = gtlb0_set_base(vcpu_e500, eaddr);
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size = vcpu_e500->gtlb_params[0].ways;
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} else {
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if (eaddr < vcpu_e500->tlb1_min_eaddr ||
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eaddr > vcpu_e500->tlb1_max_eaddr)
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return -1;
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set_base = 0;
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}
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offset = vcpu_e500->gtlb_offset[tlbsel];
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for (i = 0; i < size; i++) {
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struct kvm_book3e_206_tlb_entry *tlbe =
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&vcpu_e500->gtlb_arch[offset + set_base + i];
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unsigned int tid;
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if (eaddr < get_tlb_eaddr(tlbe))
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continue;
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if (eaddr > get_tlb_end(tlbe))
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continue;
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tid = get_tlb_tid(tlbe);
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if (tid && (tid != pid))
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continue;
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if (!get_tlb_v(tlbe))
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continue;
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if (get_tlb_ts(tlbe) != as && as != -1)
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continue;
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return set_base + i;
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}
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return -1;
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}
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static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu,
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gva_t eaddr, int as)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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unsigned int victim, tsized;
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int tlbsel;
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/* since we only have two TLBs, only lower bit is used. */
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tlbsel = (vcpu->arch.shared->mas4 >> 28) & 0x1;
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victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0;
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tsized = (vcpu->arch.shared->mas4 >> 7) & 0x1f;
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vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim)
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| MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
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vcpu->arch.shared->mas1 = MAS1_VALID | (as ? MAS1_TS : 0)
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| MAS1_TID(get_tlbmiss_tid(vcpu))
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| MAS1_TSIZE(tsized);
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vcpu->arch.shared->mas2 = (eaddr & MAS2_EPN)
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| (vcpu->arch.shared->mas4 & MAS2_ATTRIB_MASK);
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vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3;
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vcpu->arch.shared->mas6 = (vcpu->arch.shared->mas6 & MAS6_SPID1)
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| (get_cur_pid(vcpu) << 16)
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| (as ? MAS6_SAS : 0);
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}
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static void kvmppc_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500)
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{
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int size = vcpu_e500->gtlb_params[1].entries;
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unsigned int offset;
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gva_t eaddr;
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int i;
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vcpu_e500->tlb1_min_eaddr = ~0UL;
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vcpu_e500->tlb1_max_eaddr = 0;
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offset = vcpu_e500->gtlb_offset[1];
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for (i = 0; i < size; i++) {
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struct kvm_book3e_206_tlb_entry *tlbe =
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&vcpu_e500->gtlb_arch[offset + i];
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if (!get_tlb_v(tlbe))
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continue;
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eaddr = get_tlb_eaddr(tlbe);
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vcpu_e500->tlb1_min_eaddr =
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min(vcpu_e500->tlb1_min_eaddr, eaddr);
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eaddr = get_tlb_end(tlbe);
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vcpu_e500->tlb1_max_eaddr =
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max(vcpu_e500->tlb1_max_eaddr, eaddr);
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}
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}
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static int kvmppc_need_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500,
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struct kvm_book3e_206_tlb_entry *gtlbe)
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{
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unsigned long start, end, size;
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size = get_tlb_bytes(gtlbe);
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start = get_tlb_eaddr(gtlbe) & ~(size - 1);
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end = start + size - 1;
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return vcpu_e500->tlb1_min_eaddr == start ||
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vcpu_e500->tlb1_max_eaddr == end;
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}
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/* This function is supposed to be called for a adding a new valid tlb entry */
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static void kvmppc_set_tlb1map_range(struct kvm_vcpu *vcpu,
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struct kvm_book3e_206_tlb_entry *gtlbe)
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{
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unsigned long start, end, size;
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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if (!get_tlb_v(gtlbe))
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return;
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size = get_tlb_bytes(gtlbe);
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start = get_tlb_eaddr(gtlbe) & ~(size - 1);
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end = start + size - 1;
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vcpu_e500->tlb1_min_eaddr = min(vcpu_e500->tlb1_min_eaddr, start);
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vcpu_e500->tlb1_max_eaddr = max(vcpu_e500->tlb1_max_eaddr, end);
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}
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static inline int kvmppc_e500_gtlbe_invalidate(
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struct kvmppc_vcpu_e500 *vcpu_e500,
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int tlbsel, int esel)
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{
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struct kvm_book3e_206_tlb_entry *gtlbe =
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get_entry(vcpu_e500, tlbsel, esel);
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if (unlikely(get_tlb_iprot(gtlbe)))
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return -1;
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if (tlbsel == 1 && kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe))
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kvmppc_recalc_tlb1map_range(vcpu_e500);
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gtlbe->mas1 = 0;
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return 0;
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}
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int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value)
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{
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int esel;
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if (value & MMUCSR0_TLB0FI)
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for (esel = 0; esel < vcpu_e500->gtlb_params[0].entries; esel++)
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kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel);
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if (value & MMUCSR0_TLB1FI)
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for (esel = 0; esel < vcpu_e500->gtlb_params[1].entries; esel++)
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kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel);
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/* Invalidate all host shadow mappings */
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kvmppc_core_flush_tlb(&vcpu_e500->vcpu);
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return EMULATE_DONE;
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}
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int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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unsigned int ia;
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int esel, tlbsel;
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ia = (ea >> 2) & 0x1;
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/* since we only have two TLBs, only lower bit is used. */
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tlbsel = (ea >> 3) & 0x1;
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if (ia) {
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/* invalidate all entries */
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for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries;
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esel++)
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kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
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} else {
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ea &= 0xfffff000;
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esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel,
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get_cur_pid(vcpu), -1);
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if (esel >= 0)
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kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
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}
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/* Invalidate all host shadow mappings */
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kvmppc_core_flush_tlb(&vcpu_e500->vcpu);
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return EMULATE_DONE;
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}
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static void tlbilx_all(struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel,
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int pid, int type)
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{
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struct kvm_book3e_206_tlb_entry *tlbe;
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int tid, esel;
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/* invalidate all entries */
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for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries; esel++) {
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tlbe = get_entry(vcpu_e500, tlbsel, esel);
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tid = get_tlb_tid(tlbe);
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if (type == 0 || tid == pid) {
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inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
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kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
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}
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}
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}
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static void tlbilx_one(struct kvmppc_vcpu_e500 *vcpu_e500, int pid,
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gva_t ea)
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{
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int tlbsel, esel;
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for (tlbsel = 0; tlbsel < 2; tlbsel++) {
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esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, -1);
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if (esel >= 0) {
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inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
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kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
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break;
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}
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}
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}
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int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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int pid = get_cur_spid(vcpu);
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if (type == 0 || type == 1) {
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tlbilx_all(vcpu_e500, 0, pid, type);
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tlbilx_all(vcpu_e500, 1, pid, type);
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} else if (type == 3) {
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tlbilx_one(vcpu_e500, pid, ea);
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}
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return EMULATE_DONE;
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}
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int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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int tlbsel, esel;
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struct kvm_book3e_206_tlb_entry *gtlbe;
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tlbsel = get_tlb_tlbsel(vcpu);
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esel = get_tlb_esel(vcpu, tlbsel);
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gtlbe = get_entry(vcpu_e500, tlbsel, esel);
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vcpu->arch.shared->mas0 &= ~MAS0_NV(~0);
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vcpu->arch.shared->mas0 |= MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
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vcpu->arch.shared->mas1 = gtlbe->mas1;
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vcpu->arch.shared->mas2 = gtlbe->mas2;
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vcpu->arch.shared->mas7_3 = gtlbe->mas7_3;
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return EMULATE_DONE;
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}
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int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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int as = !!get_cur_sas(vcpu);
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unsigned int pid = get_cur_spid(vcpu);
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int esel, tlbsel;
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struct kvm_book3e_206_tlb_entry *gtlbe = NULL;
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for (tlbsel = 0; tlbsel < 2; tlbsel++) {
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esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, as);
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if (esel >= 0) {
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gtlbe = get_entry(vcpu_e500, tlbsel, esel);
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break;
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}
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}
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if (gtlbe) {
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esel &= vcpu_e500->gtlb_params[tlbsel].ways - 1;
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vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel)
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| MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
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vcpu->arch.shared->mas1 = gtlbe->mas1;
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vcpu->arch.shared->mas2 = gtlbe->mas2;
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vcpu->arch.shared->mas7_3 = gtlbe->mas7_3;
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} else {
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int victim;
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/* since we only have two TLBs, only lower bit is used. */
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tlbsel = vcpu->arch.shared->mas4 >> 28 & 0x1;
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victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0;
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vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel)
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| MAS0_ESEL(victim)
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| MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
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vcpu->arch.shared->mas1 =
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(vcpu->arch.shared->mas6 & MAS6_SPID0)
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| (vcpu->arch.shared->mas6 & (MAS6_SAS ? MAS1_TS : 0))
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| (vcpu->arch.shared->mas4 & MAS4_TSIZED(~0));
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vcpu->arch.shared->mas2 &= MAS2_EPN;
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vcpu->arch.shared->mas2 |= vcpu->arch.shared->mas4 &
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MAS2_ATTRIB_MASK;
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vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 |
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MAS3_U2 | MAS3_U3;
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}
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kvmppc_set_exit_type(vcpu, EMULATED_TLBSX_EXITS);
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return EMULATE_DONE;
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}
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int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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struct kvm_book3e_206_tlb_entry *gtlbe;
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int tlbsel, esel;
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int recal = 0;
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int idx;
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tlbsel = get_tlb_tlbsel(vcpu);
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esel = get_tlb_esel(vcpu, tlbsel);
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gtlbe = get_entry(vcpu_e500, tlbsel, esel);
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if (get_tlb_v(gtlbe)) {
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inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
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if ((tlbsel == 1) &&
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kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe))
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recal = 1;
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}
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gtlbe->mas1 = vcpu->arch.shared->mas1;
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gtlbe->mas2 = vcpu->arch.shared->mas2;
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if (!(vcpu->arch.shared->msr & MSR_CM))
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gtlbe->mas2 &= 0xffffffffUL;
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gtlbe->mas7_3 = vcpu->arch.shared->mas7_3;
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trace_kvm_booke206_gtlb_write(vcpu->arch.shared->mas0, gtlbe->mas1,
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gtlbe->mas2, gtlbe->mas7_3);
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if (tlbsel == 1) {
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/*
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* If a valid tlb1 entry is overwritten then recalculate the
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* min/max TLB1 map address range otherwise no need to look
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* in tlb1 array.
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*/
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if (recal)
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kvmppc_recalc_tlb1map_range(vcpu_e500);
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else
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kvmppc_set_tlb1map_range(vcpu, gtlbe);
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}
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idx = srcu_read_lock(&vcpu->kvm->srcu);
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|
|
/* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
|
|
if (tlbe_is_host_safe(vcpu, gtlbe)) {
|
|
u64 eaddr = get_tlb_eaddr(gtlbe);
|
|
u64 raddr = get_tlb_raddr(gtlbe);
|
|
|
|
if (tlbsel == 0) {
|
|
gtlbe->mas1 &= ~MAS1_TSIZE(~0);
|
|
gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K);
|
|
}
|
|
|
|
/* Premap the faulting page */
|
|
kvmppc_mmu_map(vcpu, eaddr, raddr, index_of(tlbsel, esel));
|
|
}
|
|
|
|
srcu_read_unlock(&vcpu->kvm->srcu, idx);
|
|
|
|
kvmppc_set_exit_type(vcpu, EMULATED_TLBWE_EXITS);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
static int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu,
|
|
gva_t eaddr, unsigned int pid, int as)
|
|
{
|
|
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
|
|
int esel, tlbsel;
|
|
|
|
for (tlbsel = 0; tlbsel < 2; tlbsel++) {
|
|
esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr, tlbsel, pid, as);
|
|
if (esel >= 0)
|
|
return index_of(tlbsel, esel);
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* 'linear_address' is actually an encoding of AS|PID|EADDR . */
|
|
int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
|
|
struct kvm_translation *tr)
|
|
{
|
|
int index;
|
|
gva_t eaddr;
|
|
u8 pid;
|
|
u8 as;
|
|
|
|
eaddr = tr->linear_address;
|
|
pid = (tr->linear_address >> 32) & 0xff;
|
|
as = (tr->linear_address >> 40) & 0x1;
|
|
|
|
index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
|
|
if (index < 0) {
|
|
tr->valid = 0;
|
|
return 0;
|
|
}
|
|
|
|
tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
|
|
/* XXX what does "writeable" and "usermode" even mean? */
|
|
tr->valid = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
|
|
{
|
|
unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS);
|
|
|
|
return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
|
|
}
|
|
|
|
int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
|
|
{
|
|
unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS);
|
|
|
|
return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
|
|
}
|
|
|
|
void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS);
|
|
|
|
kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.pc, as);
|
|
}
|
|
|
|
void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS);
|
|
|
|
kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.fault_dear, as);
|
|
}
|
|
|
|
gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int index,
|
|
gva_t eaddr)
|
|
{
|
|
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
|
|
struct kvm_book3e_206_tlb_entry *gtlbe;
|
|
u64 pgmask;
|
|
|
|
gtlbe = get_entry(vcpu_e500, tlbsel_of(index), esel_of(index));
|
|
pgmask = get_tlb_bytes(gtlbe) - 1;
|
|
|
|
return get_tlb_raddr(gtlbe) | (eaddr & pgmask);
|
|
}
|
|
|
|
void kvmppc_mmu_destroy_e500(struct kvm_vcpu *vcpu)
|
|
{
|
|
}
|
|
|
|
/*****************************************/
|
|
|
|
static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500)
|
|
{
|
|
int i;
|
|
|
|
kvmppc_core_flush_tlb(&vcpu_e500->vcpu);
|
|
kfree(vcpu_e500->g2h_tlb1_map);
|
|
kfree(vcpu_e500->gtlb_priv[0]);
|
|
kfree(vcpu_e500->gtlb_priv[1]);
|
|
|
|
if (vcpu_e500->shared_tlb_pages) {
|
|
vfree((void *)(round_down((uintptr_t)vcpu_e500->gtlb_arch,
|
|
PAGE_SIZE)));
|
|
|
|
for (i = 0; i < vcpu_e500->num_shared_tlb_pages; i++) {
|
|
set_page_dirty_lock(vcpu_e500->shared_tlb_pages[i]);
|
|
put_page(vcpu_e500->shared_tlb_pages[i]);
|
|
}
|
|
|
|
vcpu_e500->num_shared_tlb_pages = 0;
|
|
|
|
kfree(vcpu_e500->shared_tlb_pages);
|
|
vcpu_e500->shared_tlb_pages = NULL;
|
|
} else {
|
|
kfree(vcpu_e500->gtlb_arch);
|
|
}
|
|
|
|
vcpu_e500->gtlb_arch = NULL;
|
|
}
|
|
|
|
void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
|
|
{
|
|
sregs->u.e.mas0 = vcpu->arch.shared->mas0;
|
|
sregs->u.e.mas1 = vcpu->arch.shared->mas1;
|
|
sregs->u.e.mas2 = vcpu->arch.shared->mas2;
|
|
sregs->u.e.mas7_3 = vcpu->arch.shared->mas7_3;
|
|
sregs->u.e.mas4 = vcpu->arch.shared->mas4;
|
|
sregs->u.e.mas6 = vcpu->arch.shared->mas6;
|
|
|
|
sregs->u.e.mmucfg = vcpu->arch.mmucfg;
|
|
sregs->u.e.tlbcfg[0] = vcpu->arch.tlbcfg[0];
|
|
sregs->u.e.tlbcfg[1] = vcpu->arch.tlbcfg[1];
|
|
sregs->u.e.tlbcfg[2] = 0;
|
|
sregs->u.e.tlbcfg[3] = 0;
|
|
}
|
|
|
|
int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
|
|
{
|
|
if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
|
|
vcpu->arch.shared->mas0 = sregs->u.e.mas0;
|
|
vcpu->arch.shared->mas1 = sregs->u.e.mas1;
|
|
vcpu->arch.shared->mas2 = sregs->u.e.mas2;
|
|
vcpu->arch.shared->mas7_3 = sregs->u.e.mas7_3;
|
|
vcpu->arch.shared->mas4 = sregs->u.e.mas4;
|
|
vcpu->arch.shared->mas6 = sregs->u.e.mas6;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvmppc_get_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id,
|
|
union kvmppc_one_reg *val)
|
|
{
|
|
int r = 0;
|
|
long int i;
|
|
|
|
switch (id) {
|
|
case KVM_REG_PPC_MAS0:
|
|
*val = get_reg_val(id, vcpu->arch.shared->mas0);
|
|
break;
|
|
case KVM_REG_PPC_MAS1:
|
|
*val = get_reg_val(id, vcpu->arch.shared->mas1);
|
|
break;
|
|
case KVM_REG_PPC_MAS2:
|
|
*val = get_reg_val(id, vcpu->arch.shared->mas2);
|
|
break;
|
|
case KVM_REG_PPC_MAS7_3:
|
|
*val = get_reg_val(id, vcpu->arch.shared->mas7_3);
|
|
break;
|
|
case KVM_REG_PPC_MAS4:
|
|
*val = get_reg_val(id, vcpu->arch.shared->mas4);
|
|
break;
|
|
case KVM_REG_PPC_MAS6:
|
|
*val = get_reg_val(id, vcpu->arch.shared->mas6);
|
|
break;
|
|
case KVM_REG_PPC_MMUCFG:
|
|
*val = get_reg_val(id, vcpu->arch.mmucfg);
|
|
break;
|
|
case KVM_REG_PPC_EPTCFG:
|
|
*val = get_reg_val(id, vcpu->arch.eptcfg);
|
|
break;
|
|
case KVM_REG_PPC_TLB0CFG:
|
|
case KVM_REG_PPC_TLB1CFG:
|
|
case KVM_REG_PPC_TLB2CFG:
|
|
case KVM_REG_PPC_TLB3CFG:
|
|
i = id - KVM_REG_PPC_TLB0CFG;
|
|
*val = get_reg_val(id, vcpu->arch.tlbcfg[i]);
|
|
break;
|
|
case KVM_REG_PPC_TLB0PS:
|
|
case KVM_REG_PPC_TLB1PS:
|
|
case KVM_REG_PPC_TLB2PS:
|
|
case KVM_REG_PPC_TLB3PS:
|
|
i = id - KVM_REG_PPC_TLB0PS;
|
|
*val = get_reg_val(id, vcpu->arch.tlbps[i]);
|
|
break;
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int kvmppc_set_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id,
|
|
union kvmppc_one_reg *val)
|
|
{
|
|
int r = 0;
|
|
long int i;
|
|
|
|
switch (id) {
|
|
case KVM_REG_PPC_MAS0:
|
|
vcpu->arch.shared->mas0 = set_reg_val(id, *val);
|
|
break;
|
|
case KVM_REG_PPC_MAS1:
|
|
vcpu->arch.shared->mas1 = set_reg_val(id, *val);
|
|
break;
|
|
case KVM_REG_PPC_MAS2:
|
|
vcpu->arch.shared->mas2 = set_reg_val(id, *val);
|
|
break;
|
|
case KVM_REG_PPC_MAS7_3:
|
|
vcpu->arch.shared->mas7_3 = set_reg_val(id, *val);
|
|
break;
|
|
case KVM_REG_PPC_MAS4:
|
|
vcpu->arch.shared->mas4 = set_reg_val(id, *val);
|
|
break;
|
|
case KVM_REG_PPC_MAS6:
|
|
vcpu->arch.shared->mas6 = set_reg_val(id, *val);
|
|
break;
|
|
/* Only allow MMU registers to be set to the config supported by KVM */
|
|
case KVM_REG_PPC_MMUCFG: {
|
|
u32 reg = set_reg_val(id, *val);
|
|
if (reg != vcpu->arch.mmucfg)
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
case KVM_REG_PPC_EPTCFG: {
|
|
u32 reg = set_reg_val(id, *val);
|
|
if (reg != vcpu->arch.eptcfg)
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
case KVM_REG_PPC_TLB0CFG:
|
|
case KVM_REG_PPC_TLB1CFG:
|
|
case KVM_REG_PPC_TLB2CFG:
|
|
case KVM_REG_PPC_TLB3CFG: {
|
|
/* MMU geometry (N_ENTRY/ASSOC) can be set only using SW_TLB */
|
|
u32 reg = set_reg_val(id, *val);
|
|
i = id - KVM_REG_PPC_TLB0CFG;
|
|
if (reg != vcpu->arch.tlbcfg[i])
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
case KVM_REG_PPC_TLB0PS:
|
|
case KVM_REG_PPC_TLB1PS:
|
|
case KVM_REG_PPC_TLB2PS:
|
|
case KVM_REG_PPC_TLB3PS: {
|
|
u32 reg = set_reg_val(id, *val);
|
|
i = id - KVM_REG_PPC_TLB0PS;
|
|
if (reg != vcpu->arch.tlbps[i])
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int vcpu_mmu_geometry_update(struct kvm_vcpu *vcpu,
|
|
struct kvm_book3e_206_tlb_params *params)
|
|
{
|
|
vcpu->arch.tlbcfg[0] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
|
|
if (params->tlb_sizes[0] <= 2048)
|
|
vcpu->arch.tlbcfg[0] |= params->tlb_sizes[0];
|
|
vcpu->arch.tlbcfg[0] |= params->tlb_ways[0] << TLBnCFG_ASSOC_SHIFT;
|
|
|
|
vcpu->arch.tlbcfg[1] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
|
|
vcpu->arch.tlbcfg[1] |= params->tlb_sizes[1];
|
|
vcpu->arch.tlbcfg[1] |= params->tlb_ways[1] << TLBnCFG_ASSOC_SHIFT;
|
|
return 0;
|
|
}
|
|
|
|
int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
|
|
struct kvm_config_tlb *cfg)
|
|
{
|
|
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
|
|
struct kvm_book3e_206_tlb_params params;
|
|
char *virt;
|
|
struct page **pages;
|
|
struct tlbe_priv *privs[2] = {};
|
|
u64 *g2h_bitmap = NULL;
|
|
size_t array_len;
|
|
u32 sets;
|
|
int num_pages, ret, i;
|
|
|
|
if (cfg->mmu_type != KVM_MMU_FSL_BOOKE_NOHV)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(¶ms, (void __user *)(uintptr_t)cfg->params,
|
|
sizeof(params)))
|
|
return -EFAULT;
|
|
|
|
if (params.tlb_sizes[1] > 64)
|
|
return -EINVAL;
|
|
if (params.tlb_ways[1] != params.tlb_sizes[1])
|
|
return -EINVAL;
|
|
if (params.tlb_sizes[2] != 0 || params.tlb_sizes[3] != 0)
|
|
return -EINVAL;
|
|
if (params.tlb_ways[2] != 0 || params.tlb_ways[3] != 0)
|
|
return -EINVAL;
|
|
|
|
if (!is_power_of_2(params.tlb_ways[0]))
|
|
return -EINVAL;
|
|
|
|
sets = params.tlb_sizes[0] >> ilog2(params.tlb_ways[0]);
|
|
if (!is_power_of_2(sets))
|
|
return -EINVAL;
|
|
|
|
array_len = params.tlb_sizes[0] + params.tlb_sizes[1];
|
|
array_len *= sizeof(struct kvm_book3e_206_tlb_entry);
|
|
|
|
if (cfg->array_len < array_len)
|
|
return -EINVAL;
|
|
|
|
num_pages = DIV_ROUND_UP(cfg->array + array_len - 1, PAGE_SIZE) -
|
|
cfg->array / PAGE_SIZE;
|
|
pages = kmalloc(sizeof(struct page *) * num_pages, GFP_KERNEL);
|
|
if (!pages)
|
|
return -ENOMEM;
|
|
|
|
ret = get_user_pages_fast(cfg->array, num_pages, 1, pages);
|
|
if (ret < 0)
|
|
goto err_pages;
|
|
|
|
if (ret != num_pages) {
|
|
num_pages = ret;
|
|
ret = -EFAULT;
|
|
goto err_put_page;
|
|
}
|
|
|
|
virt = vmap(pages, num_pages, VM_MAP, PAGE_KERNEL);
|
|
if (!virt) {
|
|
ret = -ENOMEM;
|
|
goto err_put_page;
|
|
}
|
|
|
|
privs[0] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[0],
|
|
GFP_KERNEL);
|
|
privs[1] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[1],
|
|
GFP_KERNEL);
|
|
|
|
if (!privs[0] || !privs[1]) {
|
|
ret = -ENOMEM;
|
|
goto err_privs;
|
|
}
|
|
|
|
g2h_bitmap = kzalloc(sizeof(u64) * params.tlb_sizes[1],
|
|
GFP_KERNEL);
|
|
if (!g2h_bitmap) {
|
|
ret = -ENOMEM;
|
|
goto err_privs;
|
|
}
|
|
|
|
free_gtlb(vcpu_e500);
|
|
|
|
vcpu_e500->gtlb_priv[0] = privs[0];
|
|
vcpu_e500->gtlb_priv[1] = privs[1];
|
|
vcpu_e500->g2h_tlb1_map = g2h_bitmap;
|
|
|
|
vcpu_e500->gtlb_arch = (struct kvm_book3e_206_tlb_entry *)
|
|
(virt + (cfg->array & (PAGE_SIZE - 1)));
|
|
|
|
vcpu_e500->gtlb_params[0].entries = params.tlb_sizes[0];
|
|
vcpu_e500->gtlb_params[1].entries = params.tlb_sizes[1];
|
|
|
|
vcpu_e500->gtlb_offset[0] = 0;
|
|
vcpu_e500->gtlb_offset[1] = params.tlb_sizes[0];
|
|
|
|
/* Update vcpu's MMU geometry based on SW_TLB input */
|
|
vcpu_mmu_geometry_update(vcpu, ¶ms);
|
|
|
|
vcpu_e500->shared_tlb_pages = pages;
|
|
vcpu_e500->num_shared_tlb_pages = num_pages;
|
|
|
|
vcpu_e500->gtlb_params[0].ways = params.tlb_ways[0];
|
|
vcpu_e500->gtlb_params[0].sets = sets;
|
|
|
|
vcpu_e500->gtlb_params[1].ways = params.tlb_sizes[1];
|
|
vcpu_e500->gtlb_params[1].sets = 1;
|
|
|
|
kvmppc_recalc_tlb1map_range(vcpu_e500);
|
|
return 0;
|
|
|
|
err_privs:
|
|
kfree(privs[0]);
|
|
kfree(privs[1]);
|
|
|
|
err_put_page:
|
|
for (i = 0; i < num_pages; i++)
|
|
put_page(pages[i]);
|
|
|
|
err_pages:
|
|
kfree(pages);
|
|
return ret;
|
|
}
|
|
|
|
int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
|
|
struct kvm_dirty_tlb *dirty)
|
|
{
|
|
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
|
|
kvmppc_recalc_tlb1map_range(vcpu_e500);
|
|
kvmppc_core_flush_tlb(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
/* Vcpu's MMU default configuration */
|
|
static int vcpu_mmu_init(struct kvm_vcpu *vcpu,
|
|
struct kvmppc_e500_tlb_params *params)
|
|
{
|
|
/* Initialize RASIZE, PIDSIZE, NTLBS and MAVN fields with host values*/
|
|
vcpu->arch.mmucfg = mfspr(SPRN_MMUCFG) & ~MMUCFG_LPIDSIZE;
|
|
|
|
/* Initialize TLBnCFG fields with host values and SW_TLB geometry*/
|
|
vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) &
|
|
~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
|
|
vcpu->arch.tlbcfg[0] |= params[0].entries;
|
|
vcpu->arch.tlbcfg[0] |= params[0].ways << TLBnCFG_ASSOC_SHIFT;
|
|
|
|
vcpu->arch.tlbcfg[1] = mfspr(SPRN_TLB1CFG) &
|
|
~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
|
|
vcpu->arch.tlbcfg[1] |= params[1].entries;
|
|
vcpu->arch.tlbcfg[1] |= params[1].ways << TLBnCFG_ASSOC_SHIFT;
|
|
|
|
if (has_feature(vcpu, VCPU_FTR_MMU_V2)) {
|
|
vcpu->arch.tlbps[0] = mfspr(SPRN_TLB0PS);
|
|
vcpu->arch.tlbps[1] = mfspr(SPRN_TLB1PS);
|
|
|
|
vcpu->arch.mmucfg &= ~MMUCFG_LRAT;
|
|
|
|
/* Guest mmu emulation currently doesn't handle E.PT */
|
|
vcpu->arch.eptcfg = 0;
|
|
vcpu->arch.tlbcfg[0] &= ~TLBnCFG_PT;
|
|
vcpu->arch.tlbcfg[1] &= ~TLBnCFG_IND;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
|
|
{
|
|
struct kvm_vcpu *vcpu = &vcpu_e500->vcpu;
|
|
int entry_size = sizeof(struct kvm_book3e_206_tlb_entry);
|
|
int entries = KVM_E500_TLB0_SIZE + KVM_E500_TLB1_SIZE;
|
|
|
|
if (e500_mmu_host_init(vcpu_e500))
|
|
goto err;
|
|
|
|
vcpu_e500->gtlb_params[0].entries = KVM_E500_TLB0_SIZE;
|
|
vcpu_e500->gtlb_params[1].entries = KVM_E500_TLB1_SIZE;
|
|
|
|
vcpu_e500->gtlb_params[0].ways = KVM_E500_TLB0_WAY_NUM;
|
|
vcpu_e500->gtlb_params[0].sets =
|
|
KVM_E500_TLB0_SIZE / KVM_E500_TLB0_WAY_NUM;
|
|
|
|
vcpu_e500->gtlb_params[1].ways = KVM_E500_TLB1_SIZE;
|
|
vcpu_e500->gtlb_params[1].sets = 1;
|
|
|
|
vcpu_e500->gtlb_arch = kmalloc(entries * entry_size, GFP_KERNEL);
|
|
if (!vcpu_e500->gtlb_arch)
|
|
return -ENOMEM;
|
|
|
|
vcpu_e500->gtlb_offset[0] = 0;
|
|
vcpu_e500->gtlb_offset[1] = KVM_E500_TLB0_SIZE;
|
|
|
|
vcpu_e500->gtlb_priv[0] = kzalloc(sizeof(struct tlbe_ref) *
|
|
vcpu_e500->gtlb_params[0].entries,
|
|
GFP_KERNEL);
|
|
if (!vcpu_e500->gtlb_priv[0])
|
|
goto err;
|
|
|
|
vcpu_e500->gtlb_priv[1] = kzalloc(sizeof(struct tlbe_ref) *
|
|
vcpu_e500->gtlb_params[1].entries,
|
|
GFP_KERNEL);
|
|
if (!vcpu_e500->gtlb_priv[1])
|
|
goto err;
|
|
|
|
vcpu_e500->g2h_tlb1_map = kzalloc(sizeof(u64) *
|
|
vcpu_e500->gtlb_params[1].entries,
|
|
GFP_KERNEL);
|
|
if (!vcpu_e500->g2h_tlb1_map)
|
|
goto err;
|
|
|
|
vcpu_mmu_init(vcpu, vcpu_e500->gtlb_params);
|
|
|
|
kvmppc_recalc_tlb1map_range(vcpu_e500);
|
|
return 0;
|
|
|
|
err:
|
|
free_gtlb(vcpu_e500);
|
|
return -1;
|
|
}
|
|
|
|
void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500)
|
|
{
|
|
free_gtlb(vcpu_e500);
|
|
e500_mmu_host_uninit(vcpu_e500);
|
|
}
|