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arch/tlb: Clean up simple architectures 

For the architectures that do not implement their own tlb_flush() but
do already use the generic mmu_gather, there are two options:

 1) the platform has an efficient flush_tlb_range() and
    asm-generic/tlb.h doesn't need any overrides at all.

 2) the platform lacks an efficient flush_tlb_range() and
    we select MMU_GATHER_NO_RANGE to minimize full invalidates.

Convert all 'simple' architectures to one of these two forms.

alpha:	    has no range invalidate -> 2
arc:	    already used flush_tlb_range() -> 1
c6x:	    has no range invalidate -> 2
hexagon:    has an efficient flush_tlb_range() -> 1
            (flush_tlb_mm() is in fact a full range invalidate,
	     so no need to shoot down everything)
m68k:	    has inefficient flush_tlb_range() -> 2
microblaze: has no flush_tlb_range() -> 2
mips:	    has efficient flush_tlb_range() -> 1
	    (even though it currently seems to use flush_tlb_mm())
nds32:	    already uses flush_tlb_range() -> 1
nios2:	    has inefficient flush_tlb_range() -> 2
	    (no limit on range iteration)
openrisc:   has inefficient flush_tlb_range() -> 2
	    (no limit on range iteration)
parisc:	    already uses flush_tlb_range() -> 1
sparc32:    already uses flush_tlb_range() -> 1
unicore32:  has inefficient flush_tlb_range() -> 2
	    (no limit on range iteration)
xtensa:	    has efficient flush_tlb_range() -> 1

Note this also fixes a bug in the existing code for a number
platforms. Those platforms that did:

  tlb_end_vma() -> if (!full_mm) flush_tlb_*()
  tlb_flush -> if (full_mm) flush_tlb_mm()

missed the case of shift_arg_pages(), which doesn't have @fullmm set,
nor calls into tlb_*vma(), but still frees page-tables and thus needs
an invalidate. The new code handles this by detecting a non-empty
range, and either issuing the matching range invalidate or a full
invalidate, depending on the capabilities.

No change in behavior intended.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Piggin <npiggin@gmail.com>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2018-09-04 17:04:07 +02:00 committed by Ingo Molnar
parent 7bb8709d6a
commit 6137fed082
22 changed files with 16 additions and 143 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/alpha/Kconfig
View File

@ -36,6 +36,7 @@ config ALPHA
select ODD_RT_SIGACTION
select OLD_SIGSUSPEND
select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
select MMU_GATHER_NO_RANGE
help
The Alpha is a 64-bit general-purpose processor designed and
marketed by the Digital Equipment Corporation of blessed memory,

6
arch/alpha/include/asm/tlb.h
View File

@ -2,12 +2,6 @@
#ifndef _ALPHA_TLB_H
#define _ALPHA_TLB_H
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry(tlb, pte, addr) do { } while (0)
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#include <asm-generic/tlb.h>
#define __pte_free_tlb(tlb, pte, address) pte_free((tlb)->mm, pte)

23
arch/arc/include/asm/tlb.h
View File

@ -9,29 +9,6 @@
#ifndef _ASM_ARC_TLB_H
#define _ASM_ARC_TLB_H
#define tlb_flush(tlb) \
do { \
if (tlb->fullmm) \
flush_tlb_mm((tlb)->mm); \
} while (0)
/*
* This pair is called at time of munmap/exit to flush cache and TLB entries
* for mappings being torn down.
* 1) cache-flush part -implemented via tlb_start_vma( ) for VIPT aliasing D$
* 2) tlb-flush part - implemted via tlb_end_vma( ) flushes the TLB range
*
* Note, read http://lkml.org/lkml/2004/1/15/6
*/
#define tlb_end_vma(tlb, vma) \
do { \
if (!tlb->fullmm) \
flush_tlb_range(vma, vma->vm_start, vma->vm_end); \
} while (0)
#define __tlb_remove_tlb_entry(tlb, ptep, address)
#include <linux/pagemap.h>
#include <asm-generic/tlb.h>

1
arch/c6x/Kconfig
View File

@ -20,6 +20,7 @@ config C6X
select GENERIC_CLOCKEVENTS
select MODULES_USE_ELF_RELA
select ARCH_NO_COHERENT_DMA_MMAP
select MMU_GATHER_NO_RANGE if MMU
config MMU
def_bool n

2
arch/c6x/include/asm/tlb.h
View File

@ -2,8 +2,6 @@
#ifndef _ASM_C6X_TLB_H
#define _ASM_C6X_TLB_H
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#include <asm-generic/tlb.h>
#endif /* _ASM_C6X_TLB_H */

2
arch/h8300/include/asm/tlb.h
View File

@ -2,8 +2,6 @@
#ifndef __H8300_TLB_H__
#define __H8300_TLB_H__
#define tlb_flush(tlb) do { } while (0)
#include <asm-generic/tlb.h>
#endif

12
arch/hexagon/include/asm/tlb.h
View File

@ -22,18 +22,6 @@
#include <linux/pagemap.h>
#include <asm/tlbflush.h>
/*
* We don't need any special per-pte or per-vma handling...
*/
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
/*
* .. because we flush the whole mm when it fills up
*/
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#include <asm-generic/tlb.h>
#endif

1
arch/m68k/Kconfig
View File

@ -28,6 +28,7 @@ config M68K
select OLD_SIGSUSPEND3
select OLD_SIGACTION
select ARCH_DISCARD_MEMBLOCK
select MMU_GATHER_NO_RANGE if MMU
config CPU_BIG_ENDIAN
def_bool y

14
arch/m68k/include/asm/tlb.h
View File

@ -2,20 +2,6 @@
#ifndef _M68K_TLB_H
#define _M68K_TLB_H
/*
* m68k doesn't need any special per-pte or
* per-vma handling..
*/
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
/*
* .. because we flush the whole mm when it
* fills up.
*/
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#include <asm-generic/tlb.h>
#endif /* _M68K_TLB_H */

1
arch/microblaze/Kconfig
View File

@ -41,6 +41,7 @@ config MICROBLAZE
select TRACING_SUPPORT
select VIRT_TO_BUS
select CPU_NO_EFFICIENT_FFS
select MMU_GATHER_NO_RANGE if MMU
# Endianness selection
choice

9
arch/microblaze/include/asm/tlb.h
View File

@ -11,16 +11,7 @@
#ifndef _ASM_MICROBLAZE_TLB_H
#define _ASM_MICROBLAZE_TLB_H
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#include <linux/pagemap.h>
#ifdef CONFIG_MMU
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry(tlb, pte, address) do { } while (0)
#endif
#include <asm-generic/tlb.h>
#endif /* _ASM_MICROBLAZE_TLB_H */

8
arch/mips/include/asm/tlb.h
View File

@ -5,14 +5,6 @@
#include <asm/cpu-features.h>
#include <asm/mipsregs.h>
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
/*
* .. because we flush the whole mm when it fills up.
*/
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#define _UNIQUE_ENTRYHI(base, idx) \
(((base) + ((idx) << (PAGE_SHIFT + 1))) | \
(cpu_has_tlbinv ? MIPS_ENTRYHI_EHINV : 0))

10
arch/nds32/include/asm/tlb.h
View File

@ -4,16 +4,6 @@
#ifndef __ASMNDS32_TLB_H
#define __ASMNDS32_TLB_H
#define tlb_end_vma(tlb,vma) \
do { \
if(!tlb->fullmm) \
flush_tlb_range(vma, vma->vm_start, vma->vm_end); \
} while (0)
#define __tlb_remove_tlb_entry(tlb, pte, addr) do { } while (0)
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#include <asm-generic/tlb.h>
#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte)

1
arch/nios2/Kconfig
View File

@ -24,6 +24,7 @@ config NIOS2
select USB_ARCH_HAS_HCD if USB_SUPPORT
select CPU_NO_EFFICIENT_FFS
select ARCH_DISCARD_MEMBLOCK
select MMU_GATHER_NO_RANGE if MMU
config GENERIC_CSUM
def_bool y

8
arch/nios2/include/asm/tlb.h
View File

@ -11,12 +11,12 @@
#ifndef _ASM_NIOS2_TLB_H
#define _ASM_NIOS2_TLB_H
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
extern void set_mmu_pid(unsigned long pid);
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
/*
* NIOS32 does have flush_tlb_range(), but it lacks a limit and fallback to
* full mm invalidation. So use flush_tlb_mm() for everything.
*/
#include <linux/pagemap.h>
#include <asm-generic/tlb.h>

1
arch/openrisc/Kconfig
View File

@ -36,6 +36,7 @@ config OPENRISC
select OMPIC if SMP
select ARCH_WANT_FRAME_POINTERS
select GENERIC_IRQ_MULTI_HANDLER
select MMU_GATHER_NO_RANGE if MMU
config CPU_BIG_ENDIAN
def_bool y

8
arch/openrisc/include/asm/tlb.h
View File

@ -20,14 +20,10 @@
#define __ASM_OPENRISC_TLB_H__
/*
* or32 doesn't need any special per-pte or
* per-vma handling..
* OpenRISC doesn't have an efficient flush_tlb_range() so use flush_tlb_mm()
* for everything.
*/
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#include <linux/pagemap.h>
#include <asm-generic/tlb.h>

13
arch/parisc/include/asm/tlb.h
View File

@ -2,19 +2,6 @@
#ifndef _PARISC_TLB_H
#define _PARISC_TLB_H
#define tlb_flush(tlb) \
do { if ((tlb)->fullmm) \
flush_tlb_mm((tlb)->mm);\
} while (0)
#define tlb_end_vma(tlb, vma) \
do { if (!(tlb)->fullmm) \
flush_tlb_range(vma, vma->vm_start, vma->vm_end); \
} while (0)
#define __tlb_remove_tlb_entry(tlb, pte, address) \
do { } while (0)
#include <asm-generic/tlb.h>
#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd)

13
arch/sparc/include/asm/tlb_32.h
View File

@ -2,19 +2,6 @@
#ifndef _SPARC_TLB_H
#define _SPARC_TLB_H
#define tlb_end_vma(tlb, vma) \
do { \
flush_tlb_range(vma, vma->vm_start, vma->vm_end); \
} while (0)
#define __tlb_remove_tlb_entry(tlb, pte, address) \
do { } while (0)
#define tlb_flush(tlb) \
do { \
flush_tlb_mm((tlb)->mm); \
} while (0)
#include <asm-generic/tlb.h>
#endif /* _SPARC_TLB_H */

1
arch/unicore32/Kconfig
View File

@ -20,6 +20,7 @@ config UNICORE32
select GENERIC_IOMAP
select MODULES_USE_ELF_REL
select NEED_DMA_MAP_STATE
select MMU_GATHER_NO_RANGE if MMU
help
UniCore-32 is 32-bit Instruction Set Architecture,
including a series of low-power-consumption RISC chip

7
arch/unicore32/include/asm/tlb.h
View File

@ -12,10 +12,9 @@
#ifndef __UNICORE_TLB_H__
#define __UNICORE_TLB_H__
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
/*
* unicore32 lacks an efficient flush_tlb_range(), use flush_tlb_mm().
*/
#define __pte_free_tlb(tlb, pte, addr) \
do { \

17
arch/xtensa/include/asm/tlb.h
View File

@ -14,23 +14,6 @@
#include <asm/cache.h>
#include <asm/page.h>
#if (DCACHE_WAY_SIZE <= PAGE_SIZE)
# define tlb_end_vma(tlb,vma) do { } while (0)
#else
# define tlb_end_vma(tlb, vma) \
do { \
if (!tlb->fullmm) \
flush_tlb_range(vma, vma->vm_start, vma->vm_end); \
} while(0)
#endif
#define __tlb_remove_tlb_entry(tlb,pte,addr) do { } while (0)
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#include <asm-generic/tlb.h>
#define __pte_free_tlb(tlb, pte, address) pte_free((tlb)->mm, pte)