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linux/arch/powerpc/include/asm/tlbflush.h

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powerpc: merge tlbflush.h Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2005-11-04 16:58:59 +11:00
#ifndef _ASM_POWERPC_TLBFLUSH_H
#define _ASM_POWERPC_TLBFLUSH_H
[POWERPC] 4xx: Fix 4xx flush_tlb_page() On 4xx CPUs, the current implementation of flush_tlb_page() uses a low level _tlbie() assembly function that only works for the current PID. Thus, invalidations caused by, for example, a COW fault triggered by get_user_pages() from a different context will not work properly, causing among other things, gdb breakpoints to fail. This patch adds a "pid" argument to _tlbie() on 4xx processors, and uses it to flush entries in the right context. FSL BookE also gets the argument but it seems they don't need it (their tlbivax form ignores the PID when invalidating according to the document I have). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2007-10-30 09:46:06 +11:00
powerpc: merge tlbflush.h Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2005-11-04 16:58:59 +11:00
/*
* TLB flushing:
*
* - flush_tlb_mm(mm) flushes the specified mm context TLB's
* - flush_tlb_page(vma, vmaddr) flushes one page
powerpc/mm: Make low level TLB flush ops on BookE take additional args We need to pass down whether the page is direct or indirect and we'll need to pass the page size to _tlbil_va and _tlbivax_bcast We also add a new low level _tlbil_pid_noind() which does a TLB flush by PID but avoids flushing indirect entries if possible This implements those new prototypes but defines them with inlines or macros so that no additional arguments are actually passed on current processors. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-23 23:15:24 +00:00
* - local_flush_tlb_mm(mm, full) flushes the specified mm context on
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
* the local processor
* - local_flush_tlb_page(vma, vmaddr) flushes one page on the local processor
powerpc: merge tlbflush.h Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2005-11-04 16:58:59 +11:00
* - flush_tlb_page_nohash(vma, vmaddr) flushes one page if SW loaded TLB
* - flush_tlb_range(vma, start, end) flushes a range of pages
* - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifdef __KERNEL__
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
#ifdef CONFIG_PPC_MMU_NOHASH
[POWERPC] Cleanup and fix breakage in tlbflush.h BenH's commit a741e67969577163a4cfc78d7fd2753219087ef1 in powerpc.git, although (AFAICT) only intended to affect ppc64, also has side-effects which break 44x. I think 40x, 8xx and Freescale Book E are also affected, though I haven't tested them. The problem lies in unconditionally removing flush_tlb_pending() from the versions of flush_tlb_mm(), flush_tlb_range() and flush_tlb_kernel_range() used on ppc64 - which are also used the embedded platforms mentioned above. The patch below cleans up the convoluted #ifdef logic in tlbflush.h, in the process restoring the necessary flushes for the software TLB platforms. There are three sets of definitions for the flushing hooks: the software TLB versions (revised to avoid using names which appear to related to TLB batching), the 32-bit hash based versions (external functions) amd the 64-bit hash based versions (which implement batching). It also moves the declaration of update_mmu_cache() to always be in tlbflush.h (previously it was in tlbflush.h except for PPC64, where it was in pgtable.h). Booted on Ebony (440GP) and compiled for 64-bit and 32-bit multiplatform. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 13:09:12 +10:00
/*
* TLB flushing for software loaded TLB chips
*
* TODO: (CONFIG_FSL_BOOKE) determine if flush_tlb_range &
* flush_tlb_kernel_range are best implemented as tlbia vs
* specific tlbie's
*/
powerpc/mm: Make low level TLB flush ops on BookE take additional args We need to pass down whether the page is direct or indirect and we'll need to pass the page size to _tlbil_va and _tlbivax_bcast We also add a new low level _tlbil_pid_noind() which does a TLB flush by PID but avoids flushing indirect entries if possible This implements those new prototypes but defines them with inlines or macros so that no additional arguments are actually passed on current processors. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-23 23:15:24 +00:00
struct vm_area_struct;
struct mm_struct;
[POWERPC] 4xx: Fix 4xx flush_tlb_page() On 4xx CPUs, the current implementation of flush_tlb_page() uses a low level _tlbie() assembly function that only works for the current PID. Thus, invalidations caused by, for example, a COW fault triggered by get_user_pages() from a different context will not work properly, causing among other things, gdb breakpoints to fail. This patch adds a "pid" argument to _tlbie() on 4xx processors, and uses it to flush entries in the right context. FSL BookE also gets the argument but it seems they don't need it (their tlbivax form ignores the PID when invalidating according to the document I have). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2007-10-30 09:46:06 +11:00
powerpc/mm: Rework context management for CPUs with no hash table This reworks the context management code used by 4xx,8xx and freescale BookE. It adds support for SMP by implementing a concept of stale context map to lazily flush the TLB on processors where a context may have been invalidated. This also contains the ground work for generalizing such lazy TLB flushing by just picking up a new PID and marking the old one stale. This will be implemented later. This is a first implementation that uses a global spinlock. Ideally, we should try to get at least the fast path (context ID already assigned) lockless or limited to a per context lock, but for now this will do. I tried to keep the UP case reasonably simple to avoid adding too much overhead to 8xx which does a lot of context stealing since it effectively has only 16 PIDs available. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:29 +00:00
#define MMU_NO_CONTEXT ((unsigned int)-1)
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end);
extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
[POWERPC] Cleanup and fix breakage in tlbflush.h BenH's commit a741e67969577163a4cfc78d7fd2753219087ef1 in powerpc.git, although (AFAICT) only intended to affect ppc64, also has side-effects which break 44x. I think 40x, 8xx and Freescale Book E are also affected, though I haven't tested them. The problem lies in unconditionally removing flush_tlb_pending() from the versions of flush_tlb_mm(), flush_tlb_range() and flush_tlb_kernel_range() used on ppc64 - which are also used the embedded platforms mentioned above. The patch below cleans up the convoluted #ifdef logic in tlbflush.h, in the process restoring the necessary flushes for the software TLB platforms. There are three sets of definitions for the flushing hooks: the software TLB versions (revised to avoid using names which appear to related to TLB batching), the 32-bit hash based versions (external functions) amd the 64-bit hash based versions (which implement batching). It also moves the declaration of update_mmu_cache() to always be in tlbflush.h (previously it was in tlbflush.h except for PPC64, where it was in pgtable.h). Booted on Ebony (440GP) and compiled for 64-bit and 32-bit multiplatform. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 13:09:12 +10:00
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
extern void local_flush_tlb_mm(struct mm_struct *mm);
extern void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
[POWERPC] Cleanup and fix breakage in tlbflush.h BenH's commit a741e67969577163a4cfc78d7fd2753219087ef1 in powerpc.git, although (AFAICT) only intended to affect ppc64, also has side-effects which break 44x. I think 40x, 8xx and Freescale Book E are also affected, though I haven't tested them. The problem lies in unconditionally removing flush_tlb_pending() from the versions of flush_tlb_mm(), flush_tlb_range() and flush_tlb_kernel_range() used on ppc64 - which are also used the embedded platforms mentioned above. The patch below cleans up the convoluted #ifdef logic in tlbflush.h, in the process restoring the necessary flushes for the software TLB platforms. There are three sets of definitions for the flushing hooks: the software TLB versions (revised to avoid using names which appear to related to TLB batching), the 32-bit hash based versions (external functions) amd the 64-bit hash based versions (which implement batching). It also moves the declaration of update_mmu_cache() to always be in tlbflush.h (previously it was in tlbflush.h except for PPC64, where it was in pgtable.h). Booted on Ebony (440GP) and compiled for 64-bit and 32-bit multiplatform. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 13:09:12 +10:00
powerpc/mm: Make low level TLB flush ops on BookE take additional args We need to pass down whether the page is direct or indirect and we'll need to pass the page size to _tlbil_va and _tlbivax_bcast We also add a new low level _tlbil_pid_noind() which does a TLB flush by PID but avoids flushing indirect entries if possible This implements those new prototypes but defines them with inlines or macros so that no additional arguments are actually passed on current processors. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-23 23:15:24 +00:00
extern void __local_flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
int tsize, int ind);
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
#ifdef CONFIG_SMP
extern void flush_tlb_mm(struct mm_struct *mm);
extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
powerpc/mm: Make low level TLB flush ops on BookE take additional args We need to pass down whether the page is direct or indirect and we'll need to pass the page size to _tlbil_va and _tlbivax_bcast We also add a new low level _tlbil_pid_noind() which does a TLB flush by PID but avoids flushing indirect entries if possible This implements those new prototypes but defines them with inlines or macros so that no additional arguments are actually passed on current processors. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-23 23:15:24 +00:00
extern void __flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
int tsize, int ind);
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
#else
#define flush_tlb_mm(mm) local_flush_tlb_mm(mm)
#define flush_tlb_page(vma,addr) local_flush_tlb_page(vma,addr)
powerpc/mm: Make low level TLB flush ops on BookE take additional args We need to pass down whether the page is direct or indirect and we'll need to pass the page size to _tlbil_va and _tlbivax_bcast We also add a new low level _tlbil_pid_noind() which does a TLB flush by PID but avoids flushing indirect entries if possible This implements those new prototypes but defines them with inlines or macros so that no additional arguments are actually passed on current processors. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-23 23:15:24 +00:00
#define __flush_tlb_page(mm,addr,p,i) __local_flush_tlb_page(mm,addr,p,i)
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
#endif
#define flush_tlb_page_nohash(vma,addr) flush_tlb_page(vma,addr)
[POWERPC] Cleanup and fix breakage in tlbflush.h BenH's commit a741e67969577163a4cfc78d7fd2753219087ef1 in powerpc.git, although (AFAICT) only intended to affect ppc64, also has side-effects which break 44x. I think 40x, 8xx and Freescale Book E are also affected, though I haven't tested them. The problem lies in unconditionally removing flush_tlb_pending() from the versions of flush_tlb_mm(), flush_tlb_range() and flush_tlb_kernel_range() used on ppc64 - which are also used the embedded platforms mentioned above. The patch below cleans up the convoluted #ifdef logic in tlbflush.h, in the process restoring the necessary flushes for the software TLB platforms. There are three sets of definitions for the flushing hooks: the software TLB versions (revised to avoid using names which appear to related to TLB batching), the 32-bit hash based versions (external functions) amd the 64-bit hash based versions (which implement batching). It also moves the declaration of update_mmu_cache() to always be in tlbflush.h (previously it was in tlbflush.h except for PPC64, where it was in pgtable.h). Booted on Ebony (440GP) and compiled for 64-bit and 32-bit multiplatform. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 13:09:12 +10:00
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
#elif defined(CONFIG_PPC_STD_MMU_32)
[POWERPC] Cleanup and fix breakage in tlbflush.h BenH's commit a741e67969577163a4cfc78d7fd2753219087ef1 in powerpc.git, although (AFAICT) only intended to affect ppc64, also has side-effects which break 44x. I think 40x, 8xx and Freescale Book E are also affected, though I haven't tested them. The problem lies in unconditionally removing flush_tlb_pending() from the versions of flush_tlb_mm(), flush_tlb_range() and flush_tlb_kernel_range() used on ppc64 - which are also used the embedded platforms mentioned above. The patch below cleans up the convoluted #ifdef logic in tlbflush.h, in the process restoring the necessary flushes for the software TLB platforms. There are three sets of definitions for the flushing hooks: the software TLB versions (revised to avoid using names which appear to related to TLB batching), the 32-bit hash based versions (external functions) amd the 64-bit hash based versions (which implement batching). It also moves the declaration of update_mmu_cache() to always be in tlbflush.h (previously it was in tlbflush.h except for PPC64, where it was in pgtable.h). Booted on Ebony (440GP) and compiled for 64-bit and 32-bit multiplatform. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 13:09:12 +10:00
powerpc/mm/radix: Add tlbflush routines Core kernel doesn't track the page size of the VA range that we are invalidating. Hence we end up flushing TLB for the entire mm here. Later patches will improve this. We also don't flush page walk cache separetly instead use RIC=2 when flushing TLB, because we do a MMU gather flush after freeing page table. MMU_NO_CONTEXT is updated for hash. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-04-29 23:26:05 +10:00
#define MMU_NO_CONTEXT (0)
[POWERPC] Cleanup and fix breakage in tlbflush.h BenH's commit a741e67969577163a4cfc78d7fd2753219087ef1 in powerpc.git, although (AFAICT) only intended to affect ppc64, also has side-effects which break 44x. I think 40x, 8xx and Freescale Book E are also affected, though I haven't tested them. The problem lies in unconditionally removing flush_tlb_pending() from the versions of flush_tlb_mm(), flush_tlb_range() and flush_tlb_kernel_range() used on ppc64 - which are also used the embedded platforms mentioned above. The patch below cleans up the convoluted #ifdef logic in tlbflush.h, in the process restoring the necessary flushes for the software TLB platforms. There are three sets of definitions for the flushing hooks: the software TLB versions (revised to avoid using names which appear to related to TLB batching), the 32-bit hash based versions (external functions) amd the 64-bit hash based versions (which implement batching). It also moves the declaration of update_mmu_cache() to always be in tlbflush.h (previously it was in tlbflush.h except for PPC64, where it was in pgtable.h). Booted on Ebony (440GP) and compiled for 64-bit and 32-bit multiplatform. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 13:09:12 +10:00
/*
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
* TLB flushing for "classic" hash-MMU 32-bit CPUs, 6xx, 7xx, 7xxx
[POWERPC] Cleanup and fix breakage in tlbflush.h BenH's commit a741e67969577163a4cfc78d7fd2753219087ef1 in powerpc.git, although (AFAICT) only intended to affect ppc64, also has side-effects which break 44x. I think 40x, 8xx and Freescale Book E are also affected, though I haven't tested them. The problem lies in unconditionally removing flush_tlb_pending() from the versions of flush_tlb_mm(), flush_tlb_range() and flush_tlb_kernel_range() used on ppc64 - which are also used the embedded platforms mentioned above. The patch below cleans up the convoluted #ifdef logic in tlbflush.h, in the process restoring the necessary flushes for the software TLB platforms. There are three sets of definitions for the flushing hooks: the software TLB versions (revised to avoid using names which appear to related to TLB batching), the 32-bit hash based versions (external functions) amd the 64-bit hash based versions (which implement batching). It also moves the declaration of update_mmu_cache() to always be in tlbflush.h (previously it was in tlbflush.h except for PPC64, where it was in pgtable.h). Booted on Ebony (440GP) and compiled for 64-bit and 32-bit multiplatform. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 13:09:12 +10:00
*/
extern void flush_tlb_mm(struct mm_struct *mm);
extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
extern void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr);
extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end);
extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
static inline void local_flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
powerpc: Add a local_flush_tlb_page to handle kmap_atomic invalidates The tlb invalidates in kmap_atomic/kunmap_atomic can be called from IRQ context, however they are only local invalidates (on the processor that the kmap was called on). In the future we want to use IPIs to do tlb invalidates this causes issue since flush_tlb_page() is considered a broadcast invalidate. Add local_flush_tlb_page() as a non-broadcast invalidate and use it in kmap_atomic() since we don't have enough information in the flush_tlb_page() call to determine its local. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-11-19 05:53:24 +00:00
{
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
flush_tlb_page(vma, vmaddr);
}
static inline void local_flush_tlb_mm(struct mm_struct *mm)
{
flush_tlb_mm(mm);
powerpc: Add a local_flush_tlb_page to handle kmap_atomic invalidates The tlb invalidates in kmap_atomic/kunmap_atomic can be called from IRQ context, however they are only local invalidates (on the processor that the kmap was called on). In the future we want to use IPIs to do tlb invalidates this causes issue since flush_tlb_page() is considered a broadcast invalidate. Add local_flush_tlb_page() as a non-broadcast invalidate and use it in kmap_atomic() since we don't have enough information in the flush_tlb_page() call to determine its local. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-11-19 05:53:24 +00:00
}
[POWERPC] Cleanup and fix breakage in tlbflush.h BenH's commit a741e67969577163a4cfc78d7fd2753219087ef1 in powerpc.git, although (AFAICT) only intended to affect ppc64, also has side-effects which break 44x. I think 40x, 8xx and Freescale Book E are also affected, though I haven't tested them. The problem lies in unconditionally removing flush_tlb_pending() from the versions of flush_tlb_mm(), flush_tlb_range() and flush_tlb_kernel_range() used on ppc64 - which are also used the embedded platforms mentioned above. The patch below cleans up the convoluted #ifdef logic in tlbflush.h, in the process restoring the necessary flushes for the software TLB platforms. There are three sets of definitions for the flushing hooks: the software TLB versions (revised to avoid using names which appear to related to TLB batching), the 32-bit hash based versions (external functions) amd the 64-bit hash based versions (which implement batching). It also moves the declaration of update_mmu_cache() to always be in tlbflush.h (previously it was in tlbflush.h except for PPC64, where it was in pgtable.h). Booted on Ebony (440GP) and compiled for 64-bit and 32-bit multiplatform. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-24 13:09:12 +10:00
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
#elif defined(CONFIG_PPC_STD_MMU_64)
powerpc/mm: Hash abstraction for tlbflush routines Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-04-29 23:26:04 +10:00
#include <asm/book3s/64/tlbflush.h>
powerpc/mm: Add SMP support to no-hash TLB handling This commit moves the whole no-hash TLB handling out of line into a new tlb_nohash.c file, and implements some basic SMP support using IPIs and/or broadcast tlbivax instructions. Note that I'm using local invalidations for D->I cache coherency. At worst, if another processor is trying to execute the same and has the old entry in its TLB, it will just take a fault and re-do the TLB flush locally (it won't re-do the cache flush in any case). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-18 19:13:38 +00:00
#else
#error Unsupported MMU type
powerpc: merge tlbflush.h Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2005-11-04 16:58:59 +11:00
#endif
#endif /*__KERNEL__ */
#endif /* _ASM_POWERPC_TLBFLUSH_H */
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