On Sun, Apr 25, 2021 at 09:13:15PM +0100, Julien Grall wrote: > From: Wei Liu <wei.l...@citrix.com> > > The basic idea is like Persistent Kernel Map (PKMAP) in Linux. We > pre-populate all the relevant page tables before the system is fully > set up. > > We will need it on Arm in order to rework the arm64 version of > xenheap_setup_mappings() as we may need to use pages allocated from > the boot allocator before they are effectively mapped. > > This infrastructure is not lock-protected therefore can only be used > before smpboot. After smpboot, map_domain_page() has to be used. > > This is based on the x86 version [1] that was originally implemented > by Wei Liu. > > Take the opportunity to switch the parameter attr from unsigned to > unsigned int. > > [1] > <e92da4ad6015b6089737fcccba3ec1d6424649a5.1588278317.git.hongy...@amazon.com> > > Signed-off-by: Wei Liu <wei.l...@citrix.com> > Signed-off-by: Hongyan Xia <hongy...@amazon.com> > [julien: Adapted for Arm] > Signed-off-by: Julien Grall <jgr...@amazon.com> > > --- > Changes in v2: > - New patch > > Cc: Jan Beulich <jbeul...@suse.com> > Cc: Wei Liu <w...@xen.org> > Cc: Andrew Cooper <andrew.coop...@citrix.com> > Cc: Roger Pau Monné <roger....@citrix.com> > Cc: Hongian Xia <hong...@amazon.com> > > This is mostly a copy of the PMAP infrastructure currently discussed > on x86. The only difference is how the page-tables are updated. > > I think we want to consider to provide a common infrastructure. But > I haven't done it yet to gather feedback on the overall series > first.
+1. This infrastructure should be common code with arch hooks where appropriate. Wei.
