From: Sheng Yang Date: Thu, 2 Apr 2009 02:28:37 +0000 (+0800) Subject: KVM: MMU: Discard reserved bits checking on PDE bit 7-8 X-Git-Tag: v2.6.31-rc1~393^2~79 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4c26b4cd6ff6c3f7534f2aea9615a561c372ed05;p=pandora-kernel.git KVM: MMU: Discard reserved bits checking on PDE bit 7-8 1. It's related to a Linux kernel bug which fixed by Ingo on 07a66d7c53a538e1a9759954a82bb6c07365eff9. The original code exists for quite a long time, and it would convert a PDE for large page into a normal PDE. But it fail to fit normal PDE well. With the code before Ingo's fix, the kernel would fall reserved bit checking with bit 8 - the remaining global bit of PTE. So the kernel would receive a double-fault. 2. After discussion, we decide to discard PDE bit 7-8 reserved checking for now. For this marked as reserved in SDM, but didn't checked by the processor in fact... Signed-off-by: Sheng Yang Signed-off-by: Avi Kivity --- Reading git-diff-tree failed