From: Kai Huang Date: Wed, 28 Jan 2015 02:54:25 +0000 (+0800) Subject: KVM: MMU: Explicitly set D-bit for writable spte. X-Git-Tag: fixes-v4.0-rc1~113^2~24 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b51a63024bd759f97a12f50907b8af23b065b36;p=pandora-kernel.git KVM: MMU: Explicitly set D-bit for writable spte. This patch avoids unnecessary dirty GPA logging to PML buffer in EPT violation path by setting D-bit manually prior to the occurrence of the write from guest. We only set D-bit manually in set_spte, and leave fast_page_fault path unchanged, as fast_page_fault is very unlikely to happen in case of PML. For the hva <-> pa change case, the spte is updated to either read-only (host pte is read-only) or be dropped (host pte is writeable), and both cases will be handled by above changes, therefore no change is necessary. Signed-off-by: Kai Huang Reviewed-by: Xiao Guangrong Signed-off-by: Paolo Bonzini --- Reading git-diff-tree failed