KVM: PPC: Book3S PR: Fix proto-VSID calculations

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This makes sure the calculation of the proto-VSIDs used by PR KVM
is done with 64-bit arithmetic.  Since vcpu3s->context_id[] is int,
when we do vcpu3s->context_id[0] << ESID_BITS the shift will be done
with 32-bit instructions, possibly leading to significant bits
getting lost, as the context id can be up to 524283 and ESID_BITS is
18.  To fix this we cast the context id to u64 before shifting.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>

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Paul Mackerras 2013-06-22 17:13:32 +10:00 • committed by Alexander Graf

parent 5f17ce8b95

commit 8ed7b7e9d2

1 changed files with 2 additions and 2 deletions

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arch/powerpc/kvm/book3s_64_mmu_host.c

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