On Aug 9, 2011, at 11:20 AM, Avi Kivity wrote: > On 08/06/2011 01:39 PM, Christoffer Dall wrote: >> Adds support in the identity mapping feature that allows KVM to setup >> identity mapping for the Hyp mode with the AP[1] bit set as required by >> the specification and also supports freeing created sub pmd's after >> finished use. >> >> These two functions: >> - hyp_identity_mapping_add(pgd, addr, end); >> - hyp_identity_mapping_del(pgd, addr, end); >> are essentially calls the same function as the non-hyp versions but >> with a different argument value. KVM calls these functions to setup >> and teardown the identity mapping used to initialize the hypervisor. >> >> Note, the hyp-version of the _del function actually frees the pmd's >> pointed to by the pgd as opposed to the non-hyp version which just >> clears them. >> >> > > These are for mapping host memory, not guest memory, right? yes (or to be exact - hypervisor memory). The point is that there are special hardware requirements for translation tables used in Hyp-mode not otherwise satisfied by the normal page tables. > > -- > error compiling committee.c: too many arguments to function >
