PPC: Fix race in mtmsr paravirt implementation

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The current implementation of mtmsr and mtmsrd are racy in that it does:

  * check (int_pending == 0)
  ---> host sets int_pending = 1 <---
  * write shared page
  * done

while instead we should check for int_pending after the shared page is written.

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>

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Bharat Bhushan 2011-10-13 15:17:08 +05:30 • committed by Avi Kivity

parent 95325e6b19

commit f9208427f7

1 changed files with 4 additions and 6 deletions

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arch/powerpc/kernel/kvm_emul.S

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