In order to convert ia64, arm and sh to generic tlb we need to provide
some extra infrastructure to track the range of the flushed page
tables.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
---
arch/Kconfig | 3 +++
include/asm-generic/tlb.h | 35 +++++++++++++++++++++++++++++++++++
2 files changed, 38 insertions(+)
Index: linux-2.6/arch/Kconfig
===================================================================
--- linux-2.6.orig/arch/Kconfig
+++ linux-2.6/arch/Kconfig
@@ -181,4 +181,7 @@ config HAVE_ARCH_MUTEX_CPU_RELAX
config HAVE_RCU_TABLE_FREE
bool
+config HAVE_MMU_GATHER_RANGE
+ bool
+
source "kernel/gcov/Kconfig"
Index: linux-2.6/include/asm-generic/tlb.h
===================================================================
--- linux-2.6.orig/include/asm-generic/tlb.h
+++ linux-2.6/include/asm-generic/tlb.h
@@ -87,6 +87,10 @@ struct mmu_gather {
fast_mode : 1; /* No batching */
unsigned int fullmm; /* Flush full mm */
+#ifdef CONFIG_HAVE_MMU_GATHER_RANGE
+ unsigned long start, end;
+#endif
+
struct mmu_gather_batch *active;
struct mmu_gather_batch local;
struct page *__pages[MMU_GATHER_BUNDLE];
@@ -228,6 +232,35 @@ static inline void tlb_remove_page(struc
tlb_flush_mmu(tlb);
}
+#ifdef CONFIG_HAVE_MMU_GATHER_RANGE
+static inline void
+__tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, unsigned long address)
+{
+ if (!tlb->fullmm) {
+ tlb->start = min(tlb->start, address);
+ address += PAGE_SIZE;
+ tlb->end = max(tlb->end, address);
+ }
+}
+
+static inline void
+tlb_start_vma(struct mmu_gather *tlb, struct vm_area_struct *vma)
+{
+ if (!tlb->fullmm) {
+ flush_cache_range(vma, vma->vm_start, vma->vm_end);
+ tlb->start = TASK_SIZE;
+ tlb->end = 0;
+ }
+}
+
+static inline void
+tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma)
+{
+ if (!tlb->fullmm && tlb->end)
+ flush_tlb_range(vma, tlb->start, tlb->end);
+}
+#endif
+
/**
* tlb_remove_tlb_entry - remember a pte unmapping for later tlb invalidation.
*
@@ -261,6 +294,8 @@ static inline void tlb_remove_page(struc
__pmd_free_tlb(tlb, pmdp, address); \
} while (0)
+#ifndef tlb_migrate_finish
#define tlb_migrate_finish(mm) do {} while (0)
+#endif
#endif /* _ASM_GENERIC__TLB_H */
--
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