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authorMarc Zyngier <marc.zyngier@arm.com>2016-08-22 08:01:17 (GMT)
committerChristoffer Dall <christoffer.dall@linaro.org>2016-09-06 11:09:31 (GMT)
commitd2896d4b55b2e32b423072a4124d7da4dc1e6cb1 (patch)
treeeb7df663d067362b49b884db81c66f92b76a2c41 /Documentation/unshare.txt
parent20218b86ad8adb4bf71db9425bb59680f345eafd (diff)
downloadlinux-d2896d4b55b2e32b423072a4124d7da4dc1e6cb1.tar.xz
arm: KVM: Fix idmap overlap detection when the kernel is idmap'ed
We're trying hard to detect when the HYP idmap overlaps with the HYP va, as it makes the teardown of a cpu dangerous. But there is one case where an overlap is completely safe, which is when the whole of the kernel is idmap'ed, which is likely to happen on 32bit when RAM is at 0x8000000 and we're using a 2G/2G VA split. In that case, we can proceed safely. Reported-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
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