forked from Minki/linux
81c52c56e2
This patch filters noslot pfn out from error pfns based on Marcelo comment: noslot pfn is not a error pfn After this patch, - is_noslot_pfn indicates that the gfn is not in slot - is_error_pfn indicates that the gfn is in slot but the error is occurred when translate the gfn to pfn - is_error_noslot_pfn indicates that the pfn either it is error pfns or it is noslot pfn And is_invalid_pfn can be removed, it makes the code more clean Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
1439 lines
37 KiB
C
1439 lines
37 KiB
C
/*
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* Copyright (C) 2008-2011 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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*
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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.h"
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#include "timing.h"
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#define to_htlb1_esel(esel) (host_tlb_params[1].entries - (esel) - 1)
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static struct kvmppc_e500_tlb_params host_tlb_params[E500_TLB_NUM];
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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 inline unsigned int tlb1_max_shadow_size(void)
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{
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/* reserve one entry for magic page */
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return host_tlb_params[1].entries - tlbcam_index - 1;
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}
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static inline int tlbe_is_writable(struct kvm_book3e_206_tlb_entry *tlbe)
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{
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return tlbe->mas7_3 & (MAS3_SW|MAS3_UW);
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}
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static inline u32 e500_shadow_mas3_attrib(u32 mas3, int usermode)
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{
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/* Mask off reserved bits. */
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mas3 &= MAS3_ATTRIB_MASK;
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#ifndef CONFIG_KVM_BOOKE_HV
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if (!usermode) {
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/* Guest is in supervisor mode,
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* so we need to translate guest
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* supervisor permissions into user permissions. */
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mas3 &= ~E500_TLB_USER_PERM_MASK;
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mas3 |= (mas3 & E500_TLB_SUPER_PERM_MASK) << 1;
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}
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mas3 |= E500_TLB_SUPER_PERM_MASK;
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#endif
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return mas3;
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}
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static inline u32 e500_shadow_mas2_attrib(u32 mas2, int usermode)
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{
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#ifdef CONFIG_SMP
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return (mas2 & MAS2_ATTRIB_MASK) | MAS2_M;
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#else
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return mas2 & MAS2_ATTRIB_MASK;
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#endif
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}
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/*
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* writing shadow tlb entry to host TLB
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*/
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static inline void __write_host_tlbe(struct kvm_book3e_206_tlb_entry *stlbe,
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uint32_t mas0)
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{
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unsigned long flags;
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local_irq_save(flags);
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mtspr(SPRN_MAS0, mas0);
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mtspr(SPRN_MAS1, stlbe->mas1);
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mtspr(SPRN_MAS2, (unsigned long)stlbe->mas2);
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mtspr(SPRN_MAS3, (u32)stlbe->mas7_3);
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mtspr(SPRN_MAS7, (u32)(stlbe->mas7_3 >> 32));
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#ifdef CONFIG_KVM_BOOKE_HV
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mtspr(SPRN_MAS8, stlbe->mas8);
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#endif
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asm volatile("isync; tlbwe" : : : "memory");
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#ifdef CONFIG_KVM_BOOKE_HV
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/* Must clear mas8 for other host tlbwe's */
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mtspr(SPRN_MAS8, 0);
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isync();
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#endif
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local_irq_restore(flags);
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trace_kvm_booke206_stlb_write(mas0, stlbe->mas8, stlbe->mas1,
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stlbe->mas2, stlbe->mas7_3);
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}
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/*
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* Acquire a mas0 with victim hint, as if we just took a TLB miss.
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*
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* We don't care about the address we're searching for, other than that it's
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* in the right set and is not present in the TLB. Using a zero PID and a
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* userspace address means we don't have to set and then restore MAS5, or
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* calculate a proper MAS6 value.
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*/
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static u32 get_host_mas0(unsigned long eaddr)
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{
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unsigned long flags;
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u32 mas0;
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local_irq_save(flags);
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mtspr(SPRN_MAS6, 0);
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asm volatile("tlbsx 0, %0" : : "b" (eaddr & ~CONFIG_PAGE_OFFSET));
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mas0 = mfspr(SPRN_MAS0);
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local_irq_restore(flags);
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return mas0;
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}
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/* sesel is for tlb1 only */
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static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
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int tlbsel, int sesel, struct kvm_book3e_206_tlb_entry *stlbe)
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{
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u32 mas0;
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if (tlbsel == 0) {
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mas0 = get_host_mas0(stlbe->mas2);
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__write_host_tlbe(stlbe, mas0);
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} else {
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__write_host_tlbe(stlbe,
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MAS0_TLBSEL(1) |
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MAS0_ESEL(to_htlb1_esel(sesel)));
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}
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}
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#ifdef CONFIG_KVM_E500V2
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void kvmppc_map_magic(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 magic;
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ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
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unsigned int stid;
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pfn_t pfn;
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pfn = (pfn_t)virt_to_phys((void *)shared_page) >> PAGE_SHIFT;
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get_page(pfn_to_page(pfn));
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preempt_disable();
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stid = kvmppc_e500_get_sid(vcpu_e500, 0, 0, 0, 0);
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magic.mas1 = MAS1_VALID | MAS1_TS | MAS1_TID(stid) |
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MAS1_TSIZE(BOOK3E_PAGESZ_4K);
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magic.mas2 = vcpu->arch.magic_page_ea | MAS2_M;
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magic.mas7_3 = ((u64)pfn << PAGE_SHIFT) |
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MAS3_SW | MAS3_SR | MAS3_UW | MAS3_UR;
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magic.mas8 = 0;
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__write_host_tlbe(&magic, MAS0_TLBSEL(1) | MAS0_ESEL(tlbcam_index));
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preempt_enable();
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}
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#endif
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static void inval_gtlbe_on_host(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 (tlbsel == 1 &&
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vcpu_e500->gtlb_priv[1][esel].ref.flags & E500_TLB_BITMAP) {
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u64 tmp = vcpu_e500->g2h_tlb1_map[esel];
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int hw_tlb_indx;
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unsigned long flags;
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local_irq_save(flags);
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while (tmp) {
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hw_tlb_indx = __ilog2_u64(tmp & -tmp);
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mtspr(SPRN_MAS0,
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MAS0_TLBSEL(1) |
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MAS0_ESEL(to_htlb1_esel(hw_tlb_indx)));
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mtspr(SPRN_MAS1, 0);
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asm volatile("tlbwe");
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vcpu_e500->h2g_tlb1_rmap[hw_tlb_indx] = 0;
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tmp &= tmp - 1;
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}
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mb();
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vcpu_e500->g2h_tlb1_map[esel] = 0;
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vcpu_e500->gtlb_priv[1][esel].ref.flags &= ~E500_TLB_BITMAP;
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local_irq_restore(flags);
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return;
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}
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/* Guest tlbe is backed by at most one host tlbe per shadow pid. */
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kvmppc_e500_tlbil_one(vcpu_e500, gtlbe);
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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_ref_setup(struct tlbe_ref *ref,
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struct kvm_book3e_206_tlb_entry *gtlbe,
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pfn_t pfn)
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{
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ref->pfn = pfn;
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ref->flags = E500_TLB_VALID;
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if (tlbe_is_writable(gtlbe))
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kvm_set_pfn_dirty(pfn);
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}
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static inline void kvmppc_e500_ref_release(struct tlbe_ref *ref)
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{
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if (ref->flags & E500_TLB_VALID) {
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trace_kvm_booke206_ref_release(ref->pfn, ref->flags);
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ref->flags = 0;
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}
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}
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static void clear_tlb1_bitmap(struct kvmppc_vcpu_e500 *vcpu_e500)
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{
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if (vcpu_e500->g2h_tlb1_map)
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memset(vcpu_e500->g2h_tlb1_map, 0,
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sizeof(u64) * vcpu_e500->gtlb_params[1].entries);
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if (vcpu_e500->h2g_tlb1_rmap)
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memset(vcpu_e500->h2g_tlb1_rmap, 0,
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sizeof(unsigned int) * host_tlb_params[1].entries);
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}
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static void clear_tlb_privs(struct kvmppc_vcpu_e500 *vcpu_e500)
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{
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int tlbsel = 0;
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int i;
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for (i = 0; i < vcpu_e500->gtlb_params[tlbsel].entries; i++) {
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struct tlbe_ref *ref =
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&vcpu_e500->gtlb_priv[tlbsel][i].ref;
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kvmppc_e500_ref_release(ref);
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}
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}
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static void clear_tlb_refs(struct kvmppc_vcpu_e500 *vcpu_e500)
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{
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int stlbsel = 1;
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int i;
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kvmppc_e500_tlbil_all(vcpu_e500);
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for (i = 0; i < host_tlb_params[stlbsel].entries; i++) {
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struct tlbe_ref *ref =
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&vcpu_e500->tlb_refs[stlbsel][i];
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kvmppc_e500_ref_release(ref);
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}
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clear_tlb_privs(vcpu_e500);
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}
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void kvmppc_core_flush_tlb(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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clear_tlb_refs(vcpu_e500);
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clear_tlb1_bitmap(vcpu_e500);
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}
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static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu,
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unsigned int 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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/* TID must be supplied by the caller */
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static inline void kvmppc_e500_setup_stlbe(
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struct kvm_vcpu *vcpu,
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struct kvm_book3e_206_tlb_entry *gtlbe,
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int tsize, struct tlbe_ref *ref, u64 gvaddr,
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struct kvm_book3e_206_tlb_entry *stlbe)
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{
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pfn_t pfn = ref->pfn;
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u32 pr = vcpu->arch.shared->msr & MSR_PR;
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BUG_ON(!(ref->flags & E500_TLB_VALID));
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/* Force IPROT=0 for all guest mappings. */
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stlbe->mas1 = MAS1_TSIZE(tsize) | get_tlb_sts(gtlbe) | MAS1_VALID;
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stlbe->mas2 = (gvaddr & MAS2_EPN) |
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e500_shadow_mas2_attrib(gtlbe->mas2, pr);
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stlbe->mas7_3 = ((u64)pfn << PAGE_SHIFT) |
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e500_shadow_mas3_attrib(gtlbe->mas7_3, pr);
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#ifdef CONFIG_KVM_BOOKE_HV
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stlbe->mas8 = MAS8_TGS | vcpu->kvm->arch.lpid;
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#endif
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}
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static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
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u64 gvaddr, gfn_t gfn, struct kvm_book3e_206_tlb_entry *gtlbe,
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int tlbsel, struct kvm_book3e_206_tlb_entry *stlbe,
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struct tlbe_ref *ref)
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{
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struct kvm_memory_slot *slot;
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unsigned long pfn, hva;
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int pfnmap = 0;
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int tsize = BOOK3E_PAGESZ_4K;
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/*
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* Translate guest physical to true physical, acquiring
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* a page reference if it is normal, non-reserved memory.
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*
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* gfn_to_memslot() must succeed because otherwise we wouldn't
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* have gotten this far. Eventually we should just pass the slot
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* pointer through from the first lookup.
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*/
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slot = gfn_to_memslot(vcpu_e500->vcpu.kvm, gfn);
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hva = gfn_to_hva_memslot(slot, gfn);
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if (tlbsel == 1) {
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struct vm_area_struct *vma;
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down_read(¤t->mm->mmap_sem);
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vma = find_vma(current->mm, hva);
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if (vma && hva >= vma->vm_start &&
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(vma->vm_flags & VM_PFNMAP)) {
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/*
|
|
* This VMA is a physically contiguous region (e.g.
|
|
* /dev/mem) that bypasses normal Linux page
|
|
* management. Find the overlap between the
|
|
* vma and the memslot.
|
|
*/
|
|
|
|
unsigned long start, end;
|
|
unsigned long slot_start, slot_end;
|
|
|
|
pfnmap = 1;
|
|
|
|
start = vma->vm_pgoff;
|
|
end = start +
|
|
((vma->vm_end - vma->vm_start) >> PAGE_SHIFT);
|
|
|
|
pfn = start + ((hva - vma->vm_start) >> PAGE_SHIFT);
|
|
|
|
slot_start = pfn - (gfn - slot->base_gfn);
|
|
slot_end = slot_start + slot->npages;
|
|
|
|
if (start < slot_start)
|
|
start = slot_start;
|
|
if (end > slot_end)
|
|
end = slot_end;
|
|
|
|
tsize = (gtlbe->mas1 & MAS1_TSIZE_MASK) >>
|
|
MAS1_TSIZE_SHIFT;
|
|
|
|
/*
|
|
* e500 doesn't implement the lowest tsize bit,
|
|
* or 1K pages.
|
|
*/
|
|
tsize = max(BOOK3E_PAGESZ_4K, tsize & ~1);
|
|
|
|
/*
|
|
* Now find the largest tsize (up to what the guest
|
|
* requested) that will cover gfn, stay within the
|
|
* range, and for which gfn and pfn are mutually
|
|
* aligned.
|
|
*/
|
|
|
|
for (; tsize > BOOK3E_PAGESZ_4K; tsize -= 2) {
|
|
unsigned long gfn_start, gfn_end, tsize_pages;
|
|
tsize_pages = 1 << (tsize - 2);
|
|
|
|
gfn_start = gfn & ~(tsize_pages - 1);
|
|
gfn_end = gfn_start + tsize_pages;
|
|
|
|
if (gfn_start + pfn - gfn < start)
|
|
continue;
|
|
if (gfn_end + pfn - gfn > end)
|
|
continue;
|
|
if ((gfn & (tsize_pages - 1)) !=
|
|
(pfn & (tsize_pages - 1)))
|
|
continue;
|
|
|
|
gvaddr &= ~((tsize_pages << PAGE_SHIFT) - 1);
|
|
pfn &= ~(tsize_pages - 1);
|
|
break;
|
|
}
|
|
} else if (vma && hva >= vma->vm_start &&
|
|
(vma->vm_flags & VM_HUGETLB)) {
|
|
unsigned long psize = vma_kernel_pagesize(vma);
|
|
|
|
tsize = (gtlbe->mas1 & MAS1_TSIZE_MASK) >>
|
|
MAS1_TSIZE_SHIFT;
|
|
|
|
/*
|
|
* Take the largest page size that satisfies both host
|
|
* and guest mapping
|
|
*/
|
|
tsize = min(__ilog2(psize) - 10, tsize);
|
|
|
|
/*
|
|
* e500 doesn't implement the lowest tsize bit,
|
|
* or 1K pages.
|
|
*/
|
|
tsize = max(BOOK3E_PAGESZ_4K, tsize & ~1);
|
|
}
|
|
|
|
up_read(¤t->mm->mmap_sem);
|
|
}
|
|
|
|
if (likely(!pfnmap)) {
|
|
unsigned long tsize_pages = 1 << (tsize + 10 - PAGE_SHIFT);
|
|
pfn = gfn_to_pfn_memslot(slot, gfn);
|
|
if (is_error_noslot_pfn(pfn)) {
|
|
printk(KERN_ERR "Couldn't get real page for gfn %lx!\n",
|
|
(long)gfn);
|
|
return;
|
|
}
|
|
|
|
/* Align guest and physical address to page map boundaries */
|
|
pfn &= ~(tsize_pages - 1);
|
|
gvaddr &= ~((tsize_pages << PAGE_SHIFT) - 1);
|
|
}
|
|
|
|
/* Drop old ref and setup new one. */
|
|
kvmppc_e500_ref_release(ref);
|
|
kvmppc_e500_ref_setup(ref, gtlbe, pfn);
|
|
|
|
kvmppc_e500_setup_stlbe(&vcpu_e500->vcpu, gtlbe, tsize,
|
|
ref, gvaddr, stlbe);
|
|
|
|
/* Clear i-cache for new pages */
|
|
kvmppc_mmu_flush_icache(pfn);
|
|
|
|
/* Drop refcount on page, so that mmu notifiers can clear it */
|
|
kvm_release_pfn_clean(pfn);
|
|
}
|
|
|
|
/* XXX only map the one-one case, for now use TLB0 */
|
|
static void kvmppc_e500_tlb0_map(struct kvmppc_vcpu_e500 *vcpu_e500,
|
|
int esel,
|
|
struct kvm_book3e_206_tlb_entry *stlbe)
|
|
{
|
|
struct kvm_book3e_206_tlb_entry *gtlbe;
|
|
struct tlbe_ref *ref;
|
|
|
|
gtlbe = get_entry(vcpu_e500, 0, esel);
|
|
ref = &vcpu_e500->gtlb_priv[0][esel].ref;
|
|
|
|
kvmppc_e500_shadow_map(vcpu_e500, get_tlb_eaddr(gtlbe),
|
|
get_tlb_raddr(gtlbe) >> PAGE_SHIFT,
|
|
gtlbe, 0, stlbe, ref);
|
|
}
|
|
|
|
/* Caller must ensure that the specified guest TLB entry is safe to insert into
|
|
* the shadow TLB. */
|
|
/* XXX for both one-one and one-to-many , for now use TLB1 */
|
|
static int kvmppc_e500_tlb1_map(struct kvmppc_vcpu_e500 *vcpu_e500,
|
|
u64 gvaddr, gfn_t gfn, struct kvm_book3e_206_tlb_entry *gtlbe,
|
|
struct kvm_book3e_206_tlb_entry *stlbe, int esel)
|
|
{
|
|
struct tlbe_ref *ref;
|
|
unsigned int victim;
|
|
|
|
victim = vcpu_e500->host_tlb1_nv++;
|
|
|
|
if (unlikely(vcpu_e500->host_tlb1_nv >= tlb1_max_shadow_size()))
|
|
vcpu_e500->host_tlb1_nv = 0;
|
|
|
|
ref = &vcpu_e500->tlb_refs[1][victim];
|
|
kvmppc_e500_shadow_map(vcpu_e500, gvaddr, gfn, gtlbe, 1, stlbe, ref);
|
|
|
|
vcpu_e500->g2h_tlb1_map[esel] |= (u64)1 << victim;
|
|
vcpu_e500->gtlb_priv[1][esel].ref.flags |= E500_TLB_BITMAP;
|
|
if (vcpu_e500->h2g_tlb1_rmap[victim]) {
|
|
unsigned int idx = vcpu_e500->h2g_tlb1_rmap[victim];
|
|
vcpu_e500->g2h_tlb1_map[idx] &= ~(1ULL << victim);
|
|
}
|
|
vcpu_e500->h2g_tlb1_rmap[victim] = esel;
|
|
|
|
return victim;
|
|
}
|
|
|
|
static void kvmppc_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500)
|
|
{
|
|
int size = vcpu_e500->gtlb_params[1].entries;
|
|
unsigned int offset;
|
|
gva_t eaddr;
|
|
int i;
|
|
|
|
vcpu_e500->tlb1_min_eaddr = ~0UL;
|
|
vcpu_e500->tlb1_max_eaddr = 0;
|
|
offset = vcpu_e500->gtlb_offset[1];
|
|
|
|
for (i = 0; i < size; i++) {
|
|
struct kvm_book3e_206_tlb_entry *tlbe =
|
|
&vcpu_e500->gtlb_arch[offset + i];
|
|
|
|
if (!get_tlb_v(tlbe))
|
|
continue;
|
|
|
|
eaddr = get_tlb_eaddr(tlbe);
|
|
vcpu_e500->tlb1_min_eaddr =
|
|
min(vcpu_e500->tlb1_min_eaddr, eaddr);
|
|
|
|
eaddr = get_tlb_end(tlbe);
|
|
vcpu_e500->tlb1_max_eaddr =
|
|
max(vcpu_e500->tlb1_max_eaddr, eaddr);
|
|
}
|
|
}
|
|
|
|
static int kvmppc_need_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500,
|
|
struct kvm_book3e_206_tlb_entry *gtlbe)
|
|
{
|
|
unsigned long start, end, size;
|
|
|
|
size = get_tlb_bytes(gtlbe);
|
|
start = get_tlb_eaddr(gtlbe) & ~(size - 1);
|
|
end = start + size - 1;
|
|
|
|
return vcpu_e500->tlb1_min_eaddr == start ||
|
|
vcpu_e500->tlb1_max_eaddr == end;
|
|
}
|
|
|
|
/* This function is supposed to be called for a adding a new valid tlb entry */
|
|
static void kvmppc_set_tlb1map_range(struct kvm_vcpu *vcpu,
|
|
struct kvm_book3e_206_tlb_entry *gtlbe)
|
|
{
|
|
unsigned long start, end, size;
|
|
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
|
|
|
|
if (!get_tlb_v(gtlbe))
|
|
return;
|
|
|
|
size = get_tlb_bytes(gtlbe);
|
|
start = get_tlb_eaddr(gtlbe) & ~(size - 1);
|
|
end = start + size - 1;
|
|
|
|
vcpu_e500->tlb1_min_eaddr = min(vcpu_e500->tlb1_min_eaddr, start);
|
|
vcpu_e500->tlb1_max_eaddr = max(vcpu_e500->tlb1_max_eaddr, end);
|
|
}
|
|
|
|
static inline int kvmppc_e500_gtlbe_invalidate(
|
|
struct kvmppc_vcpu_e500 *vcpu_e500,
|
|
int tlbsel, int esel)
|
|
{
|
|
struct kvm_book3e_206_tlb_entry *gtlbe =
|
|
get_entry(vcpu_e500, tlbsel, esel);
|
|
|
|
if (unlikely(get_tlb_iprot(gtlbe)))
|
|
return -1;
|
|
|
|
if (tlbsel == 1 && kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe))
|
|
kvmppc_recalc_tlb1map_range(vcpu_e500);
|
|
|
|
gtlbe->mas1 = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value)
|
|
{
|
|
int esel;
|
|
|
|
if (value & MMUCSR0_TLB0FI)
|
|
for (esel = 0; esel < vcpu_e500->gtlb_params[0].entries; esel++)
|
|
kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel);
|
|
if (value & MMUCSR0_TLB1FI)
|
|
for (esel = 0; esel < vcpu_e500->gtlb_params[1].entries; esel++)
|
|
kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel);
|
|
|
|
/* Invalidate all vcpu id mappings */
|
|
kvmppc_e500_tlbil_all(vcpu_e500);
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb)
|
|
{
|
|
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
|
|
unsigned int ia;
|
|
int esel, tlbsel;
|
|
gva_t ea;
|
|
|
|
ea = ((ra) ? kvmppc_get_gpr(vcpu, ra) : 0) + kvmppc_get_gpr(vcpu, rb);
|
|
|
|
ia = (ea >> 2) & 0x1;
|
|
|
|
/* since we only have two TLBs, only lower bit is used. */
|
|
tlbsel = (ea >> 3) & 0x1;
|
|
|
|
if (ia) {
|
|
/* invalidate all entries */
|
|
for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries;
|
|
esel++)
|
|
kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
|
|
} else {
|
|
ea &= 0xfffff000;
|
|
esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel,
|
|
get_cur_pid(vcpu), -1);
|
|
if (esel >= 0)
|
|
kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
|
|
}
|
|
|
|
/* Invalidate all vcpu id mappings */
|
|
kvmppc_e500_tlbil_all(vcpu_e500);
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
static void tlbilx_all(struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel,
|
|
int pid, int rt)
|
|
{
|
|
struct kvm_book3e_206_tlb_entry *tlbe;
|
|
int tid, esel;
|
|
|
|
/* invalidate all entries */
|
|
for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries; esel++) {
|
|
tlbe = get_entry(vcpu_e500, tlbsel, esel);
|
|
tid = get_tlb_tid(tlbe);
|
|
if (rt == 0 || tid == pid) {
|
|
inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
|
|
kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void tlbilx_one(struct kvmppc_vcpu_e500 *vcpu_e500, int pid,
|
|
int ra, int rb)
|
|
{
|
|
int tlbsel, esel;
|
|
gva_t ea;
|
|
|
|
ea = kvmppc_get_gpr(&vcpu_e500->vcpu, rb);
|
|
if (ra)
|
|
ea += kvmppc_get_gpr(&vcpu_e500->vcpu, ra);
|
|
|
|
for (tlbsel = 0; tlbsel < 2; tlbsel++) {
|
|
esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, -1);
|
|
if (esel >= 0) {
|
|
inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
|
|
kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int rt, int ra, int rb)
|
|
{
|
|
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
|
|
int pid = get_cur_spid(vcpu);
|
|
|
|
if (rt == 0 || rt == 1) {
|
|
tlbilx_all(vcpu_e500, 0, pid, rt);
|
|
tlbilx_all(vcpu_e500, 1, pid, rt);
|
|
} else if (rt == 3) {
|
|
tlbilx_one(vcpu_e500, pid, ra, rb);
|
|
}
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
|
|
int tlbsel, esel;
|
|
struct kvm_book3e_206_tlb_entry *gtlbe;
|
|
|
|
tlbsel = get_tlb_tlbsel(vcpu);
|
|
esel = get_tlb_esel(vcpu, tlbsel);
|
|
|
|
gtlbe = get_entry(vcpu_e500, tlbsel, esel);
|
|
vcpu->arch.shared->mas0 &= ~MAS0_NV(~0);
|
|
vcpu->arch.shared->mas0 |= MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
|
|
vcpu->arch.shared->mas1 = gtlbe->mas1;
|
|
vcpu->arch.shared->mas2 = gtlbe->mas2;
|
|
vcpu->arch.shared->mas7_3 = gtlbe->mas7_3;
|
|
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb)
|
|
{
|
|
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
|
|
int as = !!get_cur_sas(vcpu);
|
|
unsigned int pid = get_cur_spid(vcpu);
|
|
int esel, tlbsel;
|
|
struct kvm_book3e_206_tlb_entry *gtlbe = NULL;
|
|
gva_t ea;
|
|
|
|
ea = kvmppc_get_gpr(vcpu, rb);
|
|
|
|
for (tlbsel = 0; tlbsel < 2; tlbsel++) {
|
|
esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, as);
|
|
if (esel >= 0) {
|
|
gtlbe = get_entry(vcpu_e500, tlbsel, esel);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (gtlbe) {
|
|
esel &= vcpu_e500->gtlb_params[tlbsel].ways - 1;
|
|
|
|
vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel)
|
|
| MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
|
|
vcpu->arch.shared->mas1 = gtlbe->mas1;
|
|
vcpu->arch.shared->mas2 = gtlbe->mas2;
|
|
vcpu->arch.shared->mas7_3 = gtlbe->mas7_3;
|
|
} else {
|
|
int victim;
|
|
|
|
/* since we only have two TLBs, only lower bit is used. */
|
|
tlbsel = vcpu->arch.shared->mas4 >> 28 & 0x1;
|
|
victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0;
|
|
|
|
vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel)
|
|
| MAS0_ESEL(victim)
|
|
| MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
|
|
vcpu->arch.shared->mas1 =
|
|
(vcpu->arch.shared->mas6 & MAS6_SPID0)
|
|
| (vcpu->arch.shared->mas6 & (MAS6_SAS ? MAS1_TS : 0))
|
|
| (vcpu->arch.shared->mas4 & MAS4_TSIZED(~0));
|
|
vcpu->arch.shared->mas2 &= MAS2_EPN;
|
|
vcpu->arch.shared->mas2 |= vcpu->arch.shared->mas4 &
|
|
MAS2_ATTRIB_MASK;
|
|
vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 |
|
|
MAS3_U2 | MAS3_U3;
|
|
}
|
|
|
|
kvmppc_set_exit_type(vcpu, EMULATED_TLBSX_EXITS);
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
/* sesel is for tlb1 only */
|
|
static void write_stlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
|
|
struct kvm_book3e_206_tlb_entry *gtlbe,
|
|
struct kvm_book3e_206_tlb_entry *stlbe,
|
|
int stlbsel, int sesel)
|
|
{
|
|
int stid;
|
|
|
|
preempt_disable();
|
|
stid = kvmppc_e500_get_tlb_stid(&vcpu_e500->vcpu, gtlbe);
|
|
|
|
stlbe->mas1 |= MAS1_TID(stid);
|
|
write_host_tlbe(vcpu_e500, stlbsel, sesel, stlbe);
|
|
preempt_enable();
|
|
}
|
|
|
|
int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
|
|
struct kvm_book3e_206_tlb_entry *gtlbe, stlbe;
|
|
int tlbsel, esel, stlbsel, sesel;
|
|
int recal = 0;
|
|
|
|
tlbsel = get_tlb_tlbsel(vcpu);
|
|
esel = get_tlb_esel(vcpu, tlbsel);
|
|
|
|
gtlbe = get_entry(vcpu_e500, tlbsel, esel);
|
|
|
|
if (get_tlb_v(gtlbe)) {
|
|
inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
|
|
if ((tlbsel == 1) &&
|
|
kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe))
|
|
recal = 1;
|
|
}
|
|
|
|
gtlbe->mas1 = vcpu->arch.shared->mas1;
|
|
gtlbe->mas2 = vcpu->arch.shared->mas2;
|
|
gtlbe->mas7_3 = vcpu->arch.shared->mas7_3;
|
|
|
|
trace_kvm_booke206_gtlb_write(vcpu->arch.shared->mas0, gtlbe->mas1,
|
|
gtlbe->mas2, gtlbe->mas7_3);
|
|
|
|
if (tlbsel == 1) {
|
|
/*
|
|
* If a valid tlb1 entry is overwritten then recalculate the
|
|
* min/max TLB1 map address range otherwise no need to look
|
|
* in tlb1 array.
|
|
*/
|
|
if (recal)
|
|
kvmppc_recalc_tlb1map_range(vcpu_e500);
|
|
else
|
|
kvmppc_set_tlb1map_range(vcpu, gtlbe);
|
|
}
|
|
|
|
/* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
|
|
if (tlbe_is_host_safe(vcpu, gtlbe)) {
|
|
u64 eaddr;
|
|
u64 raddr;
|
|
|
|
switch (tlbsel) {
|
|
case 0:
|
|
/* TLB0 */
|
|
gtlbe->mas1 &= ~MAS1_TSIZE(~0);
|
|
gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K);
|
|
|
|
stlbsel = 0;
|
|
kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe);
|
|
sesel = 0; /* unused */
|
|
|
|
break;
|
|
|
|
case 1:
|
|
/* TLB1 */
|
|
eaddr = get_tlb_eaddr(gtlbe);
|
|
raddr = get_tlb_raddr(gtlbe);
|
|
|
|
/* Create a 4KB mapping on the host.
|
|
* If the guest wanted a large page,
|
|
* only the first 4KB is mapped here and the rest
|
|
* are mapped on the fly. */
|
|
stlbsel = 1;
|
|
sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr,
|
|
raddr >> PAGE_SHIFT, gtlbe, &stlbe, esel);
|
|
break;
|
|
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
write_stlbe(vcpu_e500, gtlbe, &stlbe, stlbsel, sesel);
|
|
}
|
|
|
|
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(struct kvm_vcpu *vcpu)
|
|
{
|
|
}
|
|
|
|
void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
|
|
unsigned int index)
|
|
{
|
|
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
|
|
struct tlbe_priv *priv;
|
|
struct kvm_book3e_206_tlb_entry *gtlbe, stlbe;
|
|
int tlbsel = tlbsel_of(index);
|
|
int esel = esel_of(index);
|
|
int stlbsel, sesel;
|
|
|
|
gtlbe = get_entry(vcpu_e500, tlbsel, esel);
|
|
|
|
switch (tlbsel) {
|
|
case 0:
|
|
stlbsel = 0;
|
|
sesel = 0; /* unused */
|
|
priv = &vcpu_e500->gtlb_priv[tlbsel][esel];
|
|
|
|
/* Only triggers after clear_tlb_refs */
|
|
if (unlikely(!(priv->ref.flags & E500_TLB_VALID)))
|
|
kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe);
|
|
else
|
|
kvmppc_e500_setup_stlbe(vcpu, gtlbe, BOOK3E_PAGESZ_4K,
|
|
&priv->ref, eaddr, &stlbe);
|
|
break;
|
|
|
|
case 1: {
|
|
gfn_t gfn = gpaddr >> PAGE_SHIFT;
|
|
|
|
stlbsel = 1;
|
|
sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr, gfn,
|
|
gtlbe, &stlbe, esel);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
BUG();
|
|
break;
|
|
}
|
|
|
|
write_stlbe(vcpu_e500, gtlbe, &stlbe, stlbsel, sesel);
|
|
}
|
|
|
|
/************* MMU Notifiers *************/
|
|
|
|
int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
|
|
{
|
|
trace_kvm_unmap_hva(hva);
|
|
|
|
/*
|
|
* Flush all shadow tlb entries everywhere. This is slow, but
|
|
* we are 100% sure that we catch the to be unmapped page
|
|
*/
|
|
kvm_flush_remote_tlbs(kvm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
|
|
{
|
|
/* kvm_unmap_hva flushes everything anyways */
|
|
kvm_unmap_hva(kvm, start);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvm_age_hva(struct kvm *kvm, unsigned long hva)
|
|
{
|
|
/* XXX could be more clever ;) */
|
|
return 0;
|
|
}
|
|
|
|
int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
|
|
{
|
|
/* XXX could be more clever ;) */
|
|
return 0;
|
|
}
|
|
|
|
void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
|
|
{
|
|
/* The page will get remapped properly on its next fault */
|
|
kvm_unmap_hva(kvm, hva);
|
|
}
|
|
|
|
/*****************************************/
|
|
|
|
static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500)
|
|
{
|
|
int i;
|
|
|
|
clear_tlb1_bitmap(vcpu_e500);
|
|
kfree(vcpu_e500->g2h_tlb1_map);
|
|
|
|
clear_tlb_refs(vcpu_e500);
|
|
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 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];
|
|
|
|
vcpu->arch.mmucfg = mfspr(SPRN_MMUCFG) & ~MMUCFG_LPIDSIZE;
|
|
|
|
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;
|
|
|
|
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);
|
|
clear_tlb_refs(vcpu_e500);
|
|
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;
|
|
|
|
host_tlb_params[0].entries = mfspr(SPRN_TLB0CFG) & TLBnCFG_N_ENTRY;
|
|
host_tlb_params[1].entries = mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY;
|
|
|
|
/*
|
|
* This should never happen on real e500 hardware, but is
|
|
* architecturally possible -- e.g. in some weird nested
|
|
* virtualization case.
|
|
*/
|
|
if (host_tlb_params[0].entries == 0 ||
|
|
host_tlb_params[1].entries == 0) {
|
|
pr_err("%s: need to know host tlb size\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
host_tlb_params[0].ways = (mfspr(SPRN_TLB0CFG) & TLBnCFG_ASSOC) >>
|
|
TLBnCFG_ASSOC_SHIFT;
|
|
host_tlb_params[1].ways = host_tlb_params[1].entries;
|
|
|
|
if (!is_power_of_2(host_tlb_params[0].entries) ||
|
|
!is_power_of_2(host_tlb_params[0].ways) ||
|
|
host_tlb_params[0].entries < host_tlb_params[0].ways ||
|
|
host_tlb_params[0].ways == 0) {
|
|
pr_err("%s: bad tlb0 host config: %u entries %u ways\n",
|
|
__func__, host_tlb_params[0].entries,
|
|
host_tlb_params[0].ways);
|
|
return -ENODEV;
|
|
}
|
|
|
|
host_tlb_params[0].sets =
|
|
host_tlb_params[0].entries / host_tlb_params[0].ways;
|
|
host_tlb_params[1].sets = 1;
|
|
|
|
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->tlb_refs[0] =
|
|
kzalloc(sizeof(struct tlbe_ref) * host_tlb_params[0].entries,
|
|
GFP_KERNEL);
|
|
if (!vcpu_e500->tlb_refs[0])
|
|
goto err;
|
|
|
|
vcpu_e500->tlb_refs[1] =
|
|
kzalloc(sizeof(struct tlbe_ref) * host_tlb_params[1].entries,
|
|
GFP_KERNEL);
|
|
if (!vcpu_e500->tlb_refs[1])
|
|
goto err;
|
|
|
|
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_e500->h2g_tlb1_rmap = kzalloc(sizeof(unsigned int) *
|
|
host_tlb_params[1].entries,
|
|
GFP_KERNEL);
|
|
if (!vcpu_e500->h2g_tlb1_rmap)
|
|
goto err;
|
|
|
|
/* Init TLB configuration register */
|
|
vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) &
|
|
~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
|
|
vcpu->arch.tlbcfg[0] |= vcpu_e500->gtlb_params[0].entries;
|
|
vcpu->arch.tlbcfg[0] |=
|
|
vcpu_e500->gtlb_params[0].ways << TLBnCFG_ASSOC_SHIFT;
|
|
|
|
vcpu->arch.tlbcfg[1] = mfspr(SPRN_TLB1CFG) &
|
|
~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
|
|
vcpu->arch.tlbcfg[1] |= vcpu_e500->gtlb_params[1].entries;
|
|
vcpu->arch.tlbcfg[1] |=
|
|
vcpu_e500->gtlb_params[1].ways << TLBnCFG_ASSOC_SHIFT;
|
|
|
|
kvmppc_recalc_tlb1map_range(vcpu_e500);
|
|
return 0;
|
|
|
|
err:
|
|
free_gtlb(vcpu_e500);
|
|
kfree(vcpu_e500->tlb_refs[0]);
|
|
kfree(vcpu_e500->tlb_refs[1]);
|
|
return -1;
|
|
}
|
|
|
|
void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500)
|
|
{
|
|
free_gtlb(vcpu_e500);
|
|
kfree(vcpu_e500->h2g_tlb1_rmap);
|
|
kfree(vcpu_e500->tlb_refs[0]);
|
|
kfree(vcpu_e500->tlb_refs[1]);
|
|
}
|