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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-12-18 14:13:38 -0500
committerPaul Mackerras <paulus@samba.org>2008-12-20 22:21:16 -0500
commitf048aace29e007f2b642097e2da8231e0e9cce2d (patch)
tree5e99b1d1d37817703132e97388994386a7bee8da /arch/powerpc/mm/tlb_hash32.c
parent7c03d653cd257793dc40520c94e229b5fd0578e7 (diff)
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>
Diffstat (limited to 'arch/powerpc/mm/tlb_hash32.c')
-rw-r--r--arch/powerpc/mm/tlb_hash32.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/mm/tlb_hash32.c b/arch/powerpc/mm/tlb_hash32.c
index f9a47fee3927..65190587a365 100644
--- a/arch/powerpc/mm/tlb_hash32.c
+++ b/arch/powerpc/mm/tlb_hash32.c
@@ -137,6 +137,7 @@ void flush_tlb_kernel_range(unsigned long start, unsigned long end)
137 flush_range(&init_mm, start, end); 137 flush_range(&init_mm, start, end);
138 FINISH_FLUSH; 138 FINISH_FLUSH;
139} 139}
140EXPORT_SYMBOL(flush_tlb_kernel_range);
140 141
141/* 142/*
142 * Flush all the (user) entries for the address space described by mm. 143 * Flush all the (user) entries for the address space described by mm.
@@ -160,6 +161,7 @@ void flush_tlb_mm(struct mm_struct *mm)
160 flush_range(mp->vm_mm, mp->vm_start, mp->vm_end); 161 flush_range(mp->vm_mm, mp->vm_start, mp->vm_end);
161 FINISH_FLUSH; 162 FINISH_FLUSH;
162} 163}
164EXPORT_SYMBOL(flush_tlb_mm);
163 165
164void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr) 166void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
165{ 167{
@@ -176,6 +178,7 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
176 flush_hash_pages(mm->context.id, vmaddr, pmd_val(*pmd), 1); 178 flush_hash_pages(mm->context.id, vmaddr, pmd_val(*pmd), 1);
177 FINISH_FLUSH; 179 FINISH_FLUSH;
178} 180}
181EXPORT_SYMBOL(flush_tlb_page);
179 182
180/* 183/*
181 * For each address in the range, find the pte for the address 184 * For each address in the range, find the pte for the address
@@ -188,3 +191,4 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
188 flush_range(vma->vm_mm, start, end); 191 flush_range(vma->vm_mm, start, end);
189 FINISH_FLUSH; 192 FINISH_FLUSH;
190} 193}
194EXPORT_SYMBOL(flush_tlb_range);