KVM: PPC: Book3S HV: Fix kvmppc_bad_host_intr for real mode interrupts

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When CONFIG_RELOCATABLE=n, the Linux real mode interrupt handlers call
into KVM using real address. This needs to be translated to the kernel
linear effective address before the MMU is switched on.

kvmppc_bad_host_intr misses adding these bits, so when it is used to
handle a system reset interrupt (that always gets delivered in real
mode), it results in an instruction access fault immediately after
the MMU is turned on.

Fix this by ensuring the top 2 address bits are set when the MMU is
turned on.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

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Nicholas Piggin 2018-05-18 03:49:43 +10:00 • committed by Paul Mackerras

parent 878cf2bb2d

commit eadce3b48b

1 changed files with 2 additions and 0 deletions

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arch/powerpc/kvm/book3s_hv_rmhandlers.S

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