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arch
tile
kernel
tlb.c
Go to the documentation of this file.
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/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*
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*/
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#include <
linux/cpumask.h
>
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#include <linux/module.h>
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#include <
linux/hugetlb.h
>
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#include <asm/tlbflush.h>
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#include <
asm/homecache.h
>
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#include <
hv/hypervisor.h
>
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/* From tlbflush.h */
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DEFINE_PER_CPU
(
int
, current_asid);
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int
min_asid
,
max_asid
;
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/*
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* Note that we flush the L1I (for VM_EXEC pages) as well as the TLB
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* so that when we are unmapping an executable page, we also flush it.
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* Combined with flushing the L1I at context switch time, this means
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* we don't have to do any other icache flushes.
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*/
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void
flush_tlb_mm
(
struct
mm_struct
*mm)
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{
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HV_Remote_ASID
asids[
NR_CPUS
];
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int
i
= 0,
cpu
;
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for_each_cpu
(
cpu
, mm_cpumask(mm)) {
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HV_Remote_ASID
*
asid
= &asids[i++];
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asid->
y
=
cpu
/ smp_topology.width;
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asid->
x
=
cpu
% smp_topology.width;
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asid->
asid
=
per_cpu
(current_asid,
cpu
);
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}
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flush_remote
(0,
HV_FLUSH_EVICT_L1I
, mm_cpumask(mm),
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0, 0, 0,
NULL
, asids, i);
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}
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void
flush_tlb_current_task
(
void
)
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{
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flush_tlb_mm
(
current
->mm);
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}
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void
flush_tlb_page_mm
(
struct
vm_area_struct
*vma,
struct
mm_struct
*mm,
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unsigned
long
va
)
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{
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unsigned
long
size
=
vma_kernel_pagesize
(vma);
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int
cache
= (vma->
vm_flags
& VM_EXEC) ?
HV_FLUSH_EVICT_L1I
: 0;
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flush_remote
(0, cache, mm_cpumask(mm),
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va, size, size, mm_cpumask(mm),
NULL
, 0);
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}
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void
flush_tlb_page
(
struct
vm_area_struct
*vma,
unsigned
long
va
)
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{
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flush_tlb_page_mm
(vma, vma->
vm_mm
, va);
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}
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EXPORT_SYMBOL
(
flush_tlb_page
);
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void
flush_tlb_range
(
struct
vm_area_struct
*vma,
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unsigned
long
start
,
unsigned
long
end
)
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{
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unsigned
long
size
=
vma_kernel_pagesize
(vma);
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struct
mm_struct
*mm = vma->
vm_mm
;
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int
cache
= (vma->
vm_flags
& VM_EXEC) ?
HV_FLUSH_EVICT_L1I
: 0;
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flush_remote
(0, cache, mm_cpumask(mm), start, end - start, size,
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mm_cpumask(mm),
NULL
, 0);
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}
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void
flush_tlb_all
(
void
)
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{
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int
i
;
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for
(i = 0; ; ++
i
) {
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HV_VirtAddrRange
r
=
hv_inquire_virtual
(i);
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if
(r.
size
== 0)
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break
;
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flush_remote
(0,
HV_FLUSH_EVICT_L1I
,
cpu_online_mask
,
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r.
start
, r.
size
,
PAGE_SIZE
,
cpu_online_mask
,
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NULL
, 0);
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flush_remote
(0, 0,
NULL
,
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r.
start
, r.
size
,
HPAGE_SIZE
,
cpu_online_mask
,
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NULL
, 0);
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}
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}
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void
flush_tlb_kernel_range
(
unsigned
long
start
,
unsigned
long
end
)
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{
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flush_remote
(0,
HV_FLUSH_EVICT_L1I
,
cpu_online_mask
,
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start, end - start,
PAGE_SIZE
,
cpu_online_mask
,
NULL
, 0);
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}
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