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powerpc: Introduce local (non-broadcast) forms of tlb invalidates

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Introduced a new set of low level tlb invalidate functions that do not
broadcast invalidates on the bus:

_tlbil_all - invalidate all
_tlbil_pid - invalidate based on process id (or mm context)
_tlbil_va  - invalidate based on virtual address (ea + pid)

On non-SMP configs _tlbil_all should be functionally equivalent to _tlbia and
_tlbil_va should be functionally equivalent to _tlbie.

The intent of this change is to handle SMP based invalidates via IPIs instead
of broadcasts as the mechanism scales better for larger number of cores.

On e500 (fsl-booke mmu) based cores move to using MMUCSR for invalidate alls
and tlbsx/tlbwe for invalidate virtual address.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala
2008-07-15 16:12:25 -05:00
parent 1afb7f809b
commit 0ba3418b8b
4 changed files with 72 additions and 5 deletions
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13
arch/powerpc/include/asm/tlbflush.h
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@@ -29,6 +29,9 @@
#include <linux/mm.h>
extern void _tlbie(unsigned long address, unsigned int pid);
extern void _tlbil_all(void);
extern void _tlbil_pid(unsigned int pid);
extern void _tlbil_va(unsigned long address, unsigned int pid);
#if defined(CONFIG_40x) || defined(CONFIG_8xx)
#define _tlbia() asm volatile ("tlbia; sync" : : : "memory")
@@ -38,31 +41,31 @@ extern void _tlbia(void);
static inline void flush_tlb_mm(struct mm_struct *mm)
{
_tlbia();
_tlbil_pid(mm->context.id);
}
static inline void flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
_tlbie(vmaddr, vma ? vma->vm_mm->context.id : 0);
_tlbil_va(vmaddr, vma ? vma->vm_mm->context.id : 0);
}
static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
unsigned long vmaddr)
{
_tlbie(vmaddr, vma ? vma->vm_mm->context.id : 0);
flush_tlb_page(vma, vmaddr);
}
static inline void flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
_tlbia();
_tlbil_pid(vma->vm_mm->context.id);
}
static inline void flush_tlb_kernel_range(unsigned long start,
unsigned long end)
{
_tlbia();
_tlbil_pid(0);
}
#elif defined(CONFIG_PPC32)