>>> On 27.10.16 at 16:15, <boris.ostrov...@oracle.com> wrote: > On 10/27/2016 10:02 AM, Jan Beulich wrote: >>>>> On 27.10.16 at 15:51, <boris.ostrov...@oracle.com> wrote: >>> I re-read this thread and I am not sure I understand why we can't keep >>> host's RSDP descriptor. We are not mapping dom0 memory 1:1 (right?) so >>> we can place our versions of RSDT/XSDT at the address that the >>> descriptor points to. >>> >>> Unless that address is beyond dom0 memory allocation so that could be a >>> problem I guess. >> >> Also eventually we may want to add tables, not just remove some, >> and then there may not be enough space at the original location. >> Plus I think nothing precludes the XSDT living below 1Mb, and then >> we're back into the same problems discussed in another branch of >> this thread. > > Yes, that is a problem. > > I guess we will need to do something in Linux to override descriptor > search. There is already some cruft for this but it appears to be > kexec-specific.
As Roger pointed out - there should be kexec-independent logic to avoid that lookup on EFI systems (by finding the pointer earlier another way). Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
