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author | Marc Zyngier <marc.zyngier@arm.com> | 2017-04-20 16:02:21 +0100 |
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committer | Christoffer Dall <cdall@linaro.org> | 2017-04-20 20:17:57 +0200 |
commit | 1edb632133efb6226b6bef3e7d9fa8c7134ac4e2 (patch) | |
tree | 8451658c150adde8d165549ab5d2f3249344e6b1 /Documentation | |
parent | 5b560525add78e15fd5b75e5d03ea1ff988e6747 (diff) | |
download | linux-1edb632133efb6226b6bef3e7d9fa8c7134ac4e2.tar.bz2 |
ARM: KVM: Fix idmap stub entry when running Thumb-2 code
When entering the hyp stub implemented in the idmap, we try to
be mindful of the fact that we could be running a Thumb-2 kernel
by adding 1 to the address we compute. Unfortunately, the assembler
also knows about this trick, and has already generated an address
that has bit 0 set in the litteral pool.
Our superfluous correction ends up confusing the CPU entierely,
as we now branch to the stub in ARM mode instead of Thumb, and on
a possibly unaligned address for good measure. From that point,
nothing really good happens.
The obvious fix in to remove this stupid target PC correction.
Fixes: 6bebcecb6c5b ("ARM: KVM: Allow the main HYP code to use the init hyp stub implementation")
Reported-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions