From: Marc Zyngier Date: Tue, 10 Mar 2015 19:07:00 +0000 (+0000) Subject: arm64: KVM: Do not use pgd_index to index stage-2 pgd X-Git-Tag: omap-for-v4.2/o2_dc~192^2~21^2~3 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=04b8dc85bf4a64517e3cf20e409eeaa503b15cc1;p=pandora-kernel.git arm64: KVM: Do not use pgd_index to index stage-2 pgd The kernel's pgd_index macro is designed to index a normal, page sized array. KVM is a bit diffferent, as we can use concatenated pages to have a bigger address space (for example 40bit IPA with 4kB pages gives us an 8kB PGD. In the above case, the use of pgd_index will always return an index inside the first 4kB, which makes a guest that has memory above 0x8000000000 rather unhappy, as it spins forever in a page fault, whist the host happilly corrupts the lower pgd. The obvious fix is to get our own kvm_pgd_index that does the right thing(tm). Tested on X-Gene with a hacked kvmtool that put memory at a stupidly high address. Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall --- Reading git-diff-tree failed