KVM: SVM: use NPT page attributes
Right now, NPT page attributes are not used, and the final page attribute depends solely on gPAT (which however is not synced correctly), the guest MTRRs and the guest page attributes. However, we can do better by mimicking what is done for VMX. In the absence of PCI passthrough, the guest PAT can be ignored and the page attributes can be just WB. If passthrough is being used, instead, keep respecting the guest PAT, and emulate the guest MTRRs through the PAT field of the nested page tables. The only snag is that WP memory cannot be emulated correctly, because Linux's default PAT setting only includes the other types. Tested-by: NJoerg Roedel <jroedel@suse.de> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Showing
想要评论请 注册 或 登录