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powerpc/mm: Split low level tlb invalidate for nohash processors

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Currently, the various forms of low level TLB invalidations are all
implemented in misc_32.S for 32-bit processors, in a fairly scary
mess of #ifdef's and with interesting duplication such as a whole
bunch of code for FSL _tlbie and _tlbia which are no longer used.

This moves things around such that _tlbie is now defined in
hash_low_32.S and is only used by the 32-bit hash code, and all
nohash CPUs use the various _tlbil_* forms that are now moved to
a new file, tlb_nohash_low.S.

I moved all the definitions for that stuff out of
include/asm/tlbflush.h as they are really internal mm stuff, into
mm/mmu_decl.h

The code should have no functional changes.  I kept some variants
inline for trivial forms on things like 40x and 8xx.

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>
This commit is contained in:
Benjamin Herrenschmidt
2008-12-18 19:13:42 +00:00
committed by Paul Mackerras
parent f048aace29
commit 2a4aca1144
7 changed files with 292 additions and 249 deletions
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2
arch/powerpc/kvm/powerpc.c
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@@ -330,7 +330,7 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
/* XXX It would be nice to differentiate between heavyweight exit and
* sched_out here, since we could avoid the TLB flush for heavyweight
* exits. */
_tlbia();
_tlbil_all();
}
int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,