Date: Thu, 22 Aug 2013 15:55:42 -0700 From: Neel Natu <neelnatu@gmail.com> To: "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org> Cc: alc@freebsd.org, Konstantin Belousov <kib@freebsd.org> Subject: CFT: nested page table integration with amd64/pmap Message-ID: <CAFgRE9H2n63%2B3GFwWNwE-Zu3gHPBcWhD4g6frB_ksXz=HAXp5w@mail.gmail.com>
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Hi, The projects/bhyve_npt_pmap branch modifies the amd64/pmap to be able to deal with Intel EPT mappings in addition to the regular x86 page tables. This provides bhyve with the following features: 1. Memory overcommit Guest memory is now pageable and therefore virtual machines can allocate more memory than is physically available on the host. 2. Superpage mappings for guest memory Guest physical address mappings can be transparently promoted to superpages depending on memory locality and access patterns. 3. PCI passthru PCI passthru is not a new feature but we want to highlight that there haven't been any regressions in its functionality. The code is available here: http://svnweb.freebsd.org/base/projects/bhyve_npt_pmap Please give it a spin and let us know how it goes. best Neel
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