On Tue, 1 Nov 2016, Julien Grall wrote: > Hi Peng, > > Sorry for the late answer. > > On 23/09/2016 03:55, Peng Fan wrote: > > On AArch64 SoCs, some IPs may only have the capability to access > > 32 bits address space. The physical memory assigned for Dom0 maybe > > not in 4GB address space, then the IPs will not work properly. > > So need to allocate memory under 4GB for Dom0. > > > > There is no restriction that how much lowmem needs to be allocated for > > Dom0 ,so allocate lowmem as much as possible for Dom0. > > > > This patch does not affect 32-bit domain, because Variable "lowmem" is > > set to true at the beginning. If failed to allocate bank0 under 4GB, > > need to panic for 32-bit domain, because 32-bit domain requires bank0 > > be allocated under 4GB. > > > > For 64-bit domain, set "lowmem" to false, and continue allocating > > memory from above 4GB. > > > > Signed-off-by: Peng Fan <peng....@nxp.com> > > Cc: Stefano Stabellini <sstabell...@kernel.org> > > Cc: Julien Grall <julien.gr...@arm.com> > > Reviewed-by: Julien Grall <julien.gr...@arm.com> > > I am undecided whether this should be considered as a bug fix for Xen 4.8. Are > you aware of any ARM64 platform we currently support requiring allocation of > memory below 4GB?
I am more comfortable having this in 4.9 (I queued it up in xen-arm-next for now), unless we have a regression, a concrete problem, with an existing supported platform, like you wrote. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
