On 07/28/2016 05:51 PM, Julien Grall wrote: > The function p2m_set_mem_access can be re-implemented using the generic > functions p2m_get_entry and __p2m_set_entry. > > Note that because of the implementation of p2m_get_entry, a TLB > invalidation instruction will be issued for each 4KB page. Therefore the > performance of memaccess will be impacted, however the function is now > safe on all the processors. > > Also the function apply_p2m_changes is dropped completely as it is not > unused anymore. > > Signed-off-by: Julien Grall <julien.gr...@arm.com> > Cc: Razvan Cojocaru <rcojoc...@bitdefender.com> > Cc: Tamas K Lengyel <ta...@tklengyel.com> > > --- > I have not ran any performance test with memaccess for now, but I > expect an important and unavoidable impact because of how memaccess > has been designed to workaround hardware limitation. Note that might > be possible to re-work memaccess work on superpage but this should > be done in a separate patch. > --- > xen/arch/arm/p2m.c | 329 > +++++++---------------------------------------------- > 1 file changed, 38 insertions(+), 291 deletions(-)
Thanks for the CC! This seems to only impact ARM, are there any planned changes for x86 along these lines as well? Thanks, Razvan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
