On Fri, 2015-06-12 at 16:32 +0800, Chen Baozi wrote: > From: Chen Baozi <baoz...@gmail.com> > > GICv3 restricts that the maximum number of CPUs in affinity 0 (one > cluster) is 16. (See the note of 'Bits[15:0]' in '5.7.29 ICC_SGI0R_EL1 > ICC_SGI1R_EL1 and ICC_ASGI1R_EL1, GICv3 Architecture Specification') > That is to say the upper 4 bits of affinity 0 is unused. Current > implementation considers that AFF0 is equal to vCPUID, which makes all > vCPUs in one cluster, limiting its number to 16. If we would like to > support more than 16 number of vCPU in one guest, we need to make use > of AFF1. Considering the unused upper 4 bits, we need to create a pair > of functions mapping the vCPUID and virtual affinity. > > Signed-off-by: Chen Baozi <baoz...@gmail.com> > Reviewed-by: Julien Grall <julien.gr...@citrix.com>
Acked-by: Ian Campbell <ian.campb...@citrix.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
