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KVM: PPC: Book3S HV: Don't drop low-order page address bits 

Commit caaa4c804f ("KVM: PPC: Book3S HV: Fix physical address
calculations") unfortunately resulted in some low-order address bits
getting dropped in the case where the guest is creating a 4k HPTE
and the host page size is 64k.  By getting the low-order bits from
hva rather than gpa we miss out on bits 12 - 15 in this case, since
hva is at page granularity.  This puts the missing bits back in.

Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Paul Mackerras 2013-12-16 13:31:46 +11:00 committed by Alexander Graf
parent 36e7bb3802
commit df9059bb64
1 changed files with 1 additions and 0 deletions
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arch/powerpc/kvm/book3s_hv_rm_mmu.c
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@ -240,6 +240,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
is_io = hpte_cache_bits(pte_val(pte));
pa = pte_pfn(pte) << PAGE_SHIFT;
pa |= hva & (pte_size - 1);
pa |= gpa & ~PAGE_MASK;
}
}