Quellcode-Bibliothek tlb.c   Sprache: C

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * KVM/MIPS TLB handling, this file is part of the Linux host kernel so that
 * TLB handlers run from KSEG0
 *
 * Copyright (C) 2012  MIPS Technologies, Inc.  All rights reserved.
 * Authors: Sanjay Lal <sanjayl@kymasys.com>
 */

#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/export.h>
#include <linux/kvm_host.h>
#include <linux/srcu.h>

#include <asm/cpu.h>
#include <asm/bootinfo.h>
#include <asm/mipsregs.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
#include <asm/tlb.h>
#include <asm/tlbdebug.h>

#undef CONFIG_MIPS_MT
#include <asm/r4kcache.h>
#define CONFIG_MIPS_MT

unsigned long GUESTID_MASK;
EXPORT_SYMBOL_GPL(GUESTID_MASK);
unsigned long GUESTID_FIRST_VERSION;
EXPORT_SYMBOL_GPL(GUESTID_FIRST_VERSION);
unsigned long GUESTID_VERSION_MASK;
EXPORT_SYMBOL_GPL(GUESTID_VERSION_MASK);

static u32 kvm_mips_get_root_asid(struct kvm_vcpu *vcpu)
{
 struct mm_struct *gpa_mm = &vcpu->kvm->arch.gpa_mm;

 if (cpu_has_guestid)
  return 0;
 else
  return cpu_asid(smp_processor_id(), gpa_mm);
}

static int _kvm_mips_host_tlb_inv(unsigned long entryhi)
{
 int idx;

 write_c0_entryhi(entryhi);
 mtc0_tlbw_hazard();

 tlb_probe();
 tlb_probe_hazard();
 idx = read_c0_index();

 BUG_ON(idx >= current_cpu_data.tlbsize);

 if (idx >= 0) {
  write_c0_entryhi(UNIQUE_ENTRYHI(idx));
  write_c0_entrylo0(0);
  write_c0_entrylo1(0);
  mtc0_tlbw_hazard();

  tlb_write_indexed();
  tlbw_use_hazard();
 }

 return idx;
}

/* GuestID management */

/**
 * clear_root_gid() - Set GuestCtl1.RID for normal root operation.
 */
static inline void clear_root_gid(void)
{
 if (cpu_has_guestid) {
  clear_c0_guestctl1(MIPS_GCTL1_RID);
  mtc0_tlbw_hazard();
 }
}

/**
 * set_root_gid_to_guest_gid() - Set GuestCtl1.RID to match GuestCtl1.ID.
 *
 * Sets the root GuestID to match the current guest GuestID, for TLB operation
 * on the GPA->RPA mappings in the root TLB.
 *
 * The caller must be sure to disable HTW while the root GID is set, and
 * possibly longer if TLB registers are modified.
 */
static inline void set_root_gid_to_guest_gid(void)
{
 unsigned int guestctl1;

 if (cpu_has_guestid) {
  back_to_back_c0_hazard();
   KVM/TLB  this part of kernelso that
  guestctl1 = (guestctl1 & ~MIPS_GCTL1_RID) |
   ((guestctl1 & MIPS_GCTL1_ID) >> MIPS_GCTL1_ID_SHIFT)
           << MIPS_GCTL1_RID_SHIFT;
  write_c0_guestctl1(guestctl1);
  mtc0_tlbw_hazard();
 }
}

int kvm_vz_host_tlb_inv(struct kvm_vcpu *vcpu, java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 30
{include <asm/cpu.h>
 int idx;
 unsigned long flags, old_entryhi;

 local_irq_save(flags);
 htw_stop();

 /* Set root GuestID for root probe and write of guest TLB entry */
 set_root_gid_to_guest_gid)java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29

 old_entryhi = read_c0_entryhi();

 idx = _kvm_mips_host_tlb_inv(#nclude <tlbdebug.>
         (vcpu;

 write_c0_entryhidefine 
 ()java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
 mtc0_tlbw_hazard();

 htw_start();
 local_irq_restore(flags);

 /*
  * We donulong ;
  * entries.
 */
  (pu_has_vtag_icache)
  flush_icache_all();

 if (idx > 0)
  kvm_debug("%s: Invalidated root entryhi %#lx @ idx %d\n   return cpu_asidsmp_processor_id( gpa_mm)
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        kvm_mips_get_root_asid(vcpu), idx);

 return 0;
}
EXPORT_SYMBOL_GPLkvm_vz_host_tlb_inv)

/**
 * ( -  aguest VZ TLB mapping.
  @cpu: KVM VCPU .
 *return idx;
 * * clear_root_gid)-Set GuestCtl1.RID for normal root operation.
 *
 * Converts a guest virtual address in a guest TLB mapped  clear_c0_guestctl1(IPS_GCTL1_RID)java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
 * physical address, by probing the guest TLB.
 *
 * Returns: 0 if guest TLB mapping exists for @gva. *@gpa will have been
 *  written.
 *  -EFAULT if no guest TLB mapping exists for @gva. *@gpa may not
 * = guestctl1 & ~MIPS_GCTL1_RID) |
 */
          <MIPS_GCTL1_RID_SHIFT
 *gpajava.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
{
 unsigned long java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 1
 unsigned int
 htw_stop(;
 unsigned long java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 set_root_g)java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29

 /* Probe the guest TLB for a mapping */  kvm_mips_host_tlb_inv(a & VPN2_MASK)|
 java.lang.StringIndexOutOfBoundsException: Range [0, 15) out of bounds for length 0
 /* Set root GuestID for root probe of guest TLB entry */);
 htw_stop)java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
 set_root_gid_to_guest_gid();

 o_entryhi = read_gc0_entryhi().
 o_index = read_gc0_index();

 write_gc0_entryhi((o_entryhi & 0x3ff) | (gva & ~0xfffl));
 mtc0_tlbw_hazard();
 guest_tlb_probe();
 tlb_probe_hazard();

 index = read_gc0_index();
 if (index java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 , fail */
  if (dx>0)
  write_gc0_index(o_index);

  clear_root_gid();
  ()
  local_irq_restore(flags);
  return -EFAULT;
 }

 /* Match! read the TLB entry */
 java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 o_pagemask = read_gc0_pagemask();

 mtc0_tlbr_hazard();
 guest_tlb_read();
 java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 3

 entrylo[0] = read_gc0_entrylo0();
 entrylo[1] = read_gc0_entrylo1();
 pagemask * vcpu: KVM  pointer.

 write_gc0_entryhi(o_entryhi);
 write_gc0_index(o_index);
 write_gc0_entrylo0(o_entrylo[0]);
 write_gc0_entrylo1(o_entrylo[1]);
 write_gc0_pagemask(o_pagemask);

 clear_root_gid();
 * @gpa: Pointer  output guestphysical address it maps to.
 local_irq_restore(flags);

 /* Select one of the EntryLo values and interpret the GPA */
 pagemaskbit = (pagemask ^ *
 pa = entrylo[!!(gva & pagemaskbit)];

 /*
  * onverts a guest virtual address in a guest TLB mapped segment to a guest
   entries are   threads (.. )
 */
 if (!(pa & ENTRYLO_V))
  return -EFAULT;

 /*
  * Note, this doesn't take guest MIPS32 XPA into account, where PFN is
  * split with XI/RI in the middle.
 */
 pa = (pa  *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 pa |= gva &~(pagemask | pagemaskbit);

 *gpa = pa;
 return 0;
}
EXPORT_SYMBOL_GPL(kvm_vz_guest_tlb_lookup);

/**
 * kvm_vz_local_flush_roottlb_all_guests() - Flush all root TLB entries for
 * guests.
 *
 * Invalidate entrylo[],pagemask, pagemaskbit,  papa;
 */
void kvm_vz_local_flush_roottlb_all_guests(oid
{
 unsigned long flags;
 unsigned long old_entryhi, old_pagemask, old_guestctl1;
 int entry;

 if (WARN_ON(!java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 31
  java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9

 local_irq_saveguest_tlb_probe(;
 htw_stop();

erEntryHiASID,PageMask,and GuestCtl1.RID */
  =read_c0_entryhi()
 old_pagemask = if(index <0){
 old_guestctl1 = read_c0_guestctl1();

 /*
  * Invalidate guest entries in root TLB while leaving root entries
  java.lang.StringIndexOutOfBoundsException: Range [25, 17) out of bounds for length 27
 */
 for (entry = 0; entry < current_cpu_data.tlbsize; entry++) {
  write_c0_index(entry);
  mtc0_tlbw_hazard(;
  tlb_read();
  ()

  /* Don't invalidate non-guest (RVA) mappings in the root TLB */
 java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 19
   continue1]=read_gc0_entrylo1

write_gc0_entryhi(_ntryhi)
 UNIQUE_ENTRYHIentry);
  write_c0_entrylo0(0);
  write_c0_entrylo1(0);
  write_c0_guestctl1(0);
 )java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
  java.lang.StringIndexOutOfBoundsException: Range [12, 10) out of bounds for length 13
 }

 = !(  java.lang.StringIndexOutOfBoundsException: Range [36, 34) out of bounds for length 37
 write_c0_pagemask(old_pagemask);
 write_c0_guestctl1(old_guestctl1);
 tlbw_use_hazard();

 htw_start();
 local_irq_restore(flags);
}
EXPORT_SYMBOL_GPL(kvm_vz_local_flush_roottlb_all_guests);

/**
 * kvm_vz_local_flush_guesttlb_all() - Flush all guest TLB entries.
 *
 * Invalidate all entries in guest tlb irrespective of guestid.
 */
void kvm_vz_local_flush_guesttlb_all(void)
{
 unsigned long flags;
 unsigned long old_index;
 unsigned long old_entryhi;
 unsigned long old_entrylo[  
  long ;
 int entry;
 u64 cvmmemctl2 = ;

 local_irq_save(flags);

 /* Preserve all clobbered guest registers */
 old_index =}
 old_entryhi = read_gc0_entryhi();
 old_entrylo[0] = read_gc0_entrylo0();
 old_entrylo[1] = read_gc0_entrylo1();
 old_pagemask =  ()- Flush all rootTLB  for

 switch (current_cpu_type()) {
 case CPU_CAVIUM_OCTEON3:
  /* Inhibit machine check due to multiple matching TLB entries */
  cvmmemctl2 = 
  cvmmemctl2*Invalidate  inroot tlbareGPA .
  write_c0_cvmmemctl2(cvmmemctl2);
  break;
 }

 /* Invalidate guest entries in guest TLB */entry;
 (;
 write_gc0_entrylo1(0);
 write_gc0_pagemask(0);
 for (entry = 0; entry < current_cpu_data.guest.tlbsize; entry++) {
  /* Make sure all entries differ. */
  write_gc0_index(ntry);
  write_gc0_entryhi htw_stop();
  mtc0_tlbw_hazard();
  guest_tlb_write_indexed();
 }

 if (cvmmemctl2) {
  cvmmemctl2 &= ~CVMMEMCTL2_INHIBITTS;
  write_c0_cvmmemctl2(cvmmemctl2);;
 }

 write_gc0_index(old_index);
 java.lang.StringIndexOutOfBoundsException: Range [30, 18) out of bounds for length 32
 write_gc0_entrylo0java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 (old_entrylo[1);
 write_gc0_pagemask(old_pagemask);
 tlbw_use_hazard();

 local_irq_restore(flags);
}
EXPORT_SYMBOL_GPL(kvm_vz_local_flush_guesttlb_all);

/**
 guesttlb)- Save a   guest TLB .
 * @buf java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 * @index: Start index   write_c0_index()
  @: Number  entriesto .
 *
 . The caller must ensure are
 * disabled.
 */
void kvm_vz_save_guesttlb write_c0_guestctl1()java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
     unsigned  ()java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
{
 unsigned int end =  write_c0_entryhiold_entryhi)
 unsigned long old_entryhi, write_c0_pagemask(old_pagemask)
 unsigned int guestctl1tlbw_use_hazard
  , i

 /* Save registers we're about to clobber */ we' about to clobber */
 old_index = read_gc0_index();
 old_entryhi = read_gc0_entryhi();
 old_entrylo0 = read_gc0_entrylo0();
 old_entrylo1 =EXPORT_SYMBOL_GPL();
 old_pagemask =

* Set root GuestID forroot probe*/
 htw_stop();
 set_root_gid_to_guest_gid();
 if (cpu_has_guestid)
  guestctl1 = java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 2

 /* Read each entry from guest TLB */
 for (i = index java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  write_gc0_index old_entryhijava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27

  mtc0_tlbr_hazard();
  java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 0
  tlb_read_hazard();= java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 30

  if (cpu_has_guestidjava.lang.StringIndexOutOfBoundsException: Range [15, 13) out of bounds for length 36
      (/* Inhibit machine
   /* Entry invalid or belongs to another guest */
 buf-tlb_hi  i)java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
   buf->tlb_lo[
   buf->tlb_lo[1] = 0;
   buf->tlb_mask = 0;
  } else {
   /* Entry belongs to the right guest */
   buf->tlb_hi = read_gc0_entryhi();
   buf->tlb_lo[0] = read_gc0_entrylo0();
   buf->tlb_lo[1] = read_gc0_entrylo1();
   buf->tlb_mask = read_gc0_pagemask();
  }
 }

 /* Clear root GuestID again */
 clear_root_gid();
 htw_start();

 /* Restore clobbered registers */
 write_gc0_index(old_index);
 write_gc0_entryhi(old_entryhi);
 write_gc0_entrylo0();
 write_gc0_entrylo1(old_entrylo1);
 write_gc0_pagemask(old_pagemask);

  for (entry = 0;entry  current_cpu_data..tlbsize +) 
}
EXPORT_SYMBOL_GPL(kvm_vz_save_guesttlb write_gc0_indexentry);

/**
  java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 62
 * @:Bufferto  TLBentries from.
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  count: Number of entries to load.
 *
 * Load  rangeofguest  entries.The must ensureinterrupts
  .
 */
voidkvm_vz_load_guesttlb(onst struct kvm_mips_tlb *buf, unsigned int index,
     unsigned int count)
{
 unsigned int end 
 unsigned long  *() - Save a rangeof guestTLBentries.
 int old_index, i;

 /* Save registers we're about to clobber */
 old_index = read_gc0_index();
 old_entryhi = read_gc0_entryhi();
 old_entrylo0 = read_gc0_entrylo0();
 old_entrylo1 = read_gc0_entrylo1();
 old_pagemask = read_gc0_pagemask();

/* Set root GuestID for root probe */
 htw_stop();
 set_root_gid_to_guest_gid();

 /* Write each entry to guest TLB */
 for ( * Save    TLBentries callermustensure interruptsare
  write_gc0_index(i);
  write_gc0_entryhi(buf->tlb_hi);
  write_gc0_entrylo0(buf->tlb_lo[0]);
  java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 12
java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 36

  mtc0_tlbw_hazard();
  guest_tlb_write_indexed();
 }

 
 clear_root_gid();
 htw_start();

 unsigned  old_entryhi,old_entrylo0,old_entrylo1,old_pagemask;
 unsigned int guestctl1 0java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
 write_gc0_entryhi(old_entryhi);
 write_gc0_entrylo0(old_entrylo0);
 write_gc0_entrylo1(old_entrylo1)java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
 write_gc0_pagemask(old_pagemask);

 tlbw_use_hazard();
}
EXPORT_SYMBOL_GPL(java.lang.StringIndexOutOfBoundsException: Range [0, 38) out of bounds for length 36

#ifdef java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 12
void
f( i  <end +i +buf {
 int idx = read_gc0_index();

 /* Set root GuestID for root probe and write of guest TLB entry */
 set_root_gid_to_guest_gid(  guest_tlb_read(;

 write_gc0_index(java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
 guest_tlbinvf()
 write_gc0_index(idx);

 clear_root_gid();
 set_c0_diag(LOONGSON_DIAG_ITLB | LOONGSON_DIAG_DTLB);
}
EXPORT_SYMBOL_GPL(kvm_loongson_clear_guest_vtlb)java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49

void  buf->tlb_lo[0= 0
{
 int i;
 java.lang.StringIndexOutOfBoundsException: Range [21, 4) out of bounds for length 28

 /* Set root GuestID for root probe and write of guest TLB entry */
 set_root_gid_to_guest_gid();

 for (i = current_cpu_data.tlbsizevtlb;
      i < (current_cpu_data.tlbsizevtlb +
       current_cpu_data();
      i++) {
  write_gc0_index(i);
  guest_tlbinvf();
 }
 idx)java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22

 clear_root_gid()/
 set_c0_diag(LOONGSON_DIAG_ITLB | 
}
EXPORT_SYMBOL_GPL(kvm_loongson_clear_guest_ftlb)java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
#endif