Haozhong Zhang aa2e063aea KVM: MMU: consider host cache mode in MMIO page check ... Some reserved pages, such as those from NVDIMM DAX devices, are not for MMIO, and can be mapped with cached memory type for better performance. However, the above check misconceives those pages as MMIO. Because KVM maps MMIO pages with UC memory type, the performance of guest accesses to those pages would be harmed. Therefore, we check the host memory type in addition and only treat UC/UC-/WC pages as MMIO. Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com> Reported-by: Cuevas Escareno, Ivan D <ivan.d.cuevas.escareno@intel.com> Reported-by: Kumar, Karthik <karthik.kumar@intel.com> Reviewed-by: Xiao Guangrong <xiaoguangrong@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>		2018-01-16 16:40:09 +01:00
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boot
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include	x86/mm: add a function to check if a pfn is UC/UC-/WC	2018-01-16 16:40:09 +01:00
kernel	Merge branch 'sev-v9-p2' of https://github.com/codomania/kvm	2018-01-16 16:35:32 +01:00
kvm	KVM: MMU: consider host cache mode in MMIO page check	2018-01-16 16:40:09 +01:00
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mm	x86/mm: add a function to check if a pfn is UC/UC-/WC	2018-01-16 16:40:09 +01:00
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