[PATCH v6 1/2] x86/mm: add a function to check if a pfn is UC/UC-/WCee

Check whether the PAT memory type of a pfn cannot be overridden by MTRR UC memory type, i.e. the PAT memory type is UC, UC- or WC. This function will be used by KVM to determine whether it needs to map a host pfn to guest with UC memory type. Signed-off-by: Haozhong Zhang

[PATCH v6 1/2] x86/mm: add a function to check if a pfn is UC/UC-/WCee

Check whether the PAT memory type of a pfn cannot be overridden by MTRR UC memory type, i.e. the PAT memory type is UC, UC- or WC. This function will be used by KVM to determine whether it needs to map a host pfn to guest with UC memory type. Signed-off-by: Haozhong Zhang Reviewed-by: Xiao