Superpage support and PVHVM. Signed-off-by: George Dunlap <george.dun...@citrix.com> --- Changes since v2: - Reworked superpage section
CC: Ian Jackson <ian.jack...@citrix.com> CC: Wei Liu <wei.l...@citrix.com> CC: Andrew Cooper <andrew.coop...@citrix.com> CC: Jan Beulich <jbeul...@suse.com> CC: Stefano Stabellini <sstabell...@kernel.org> CC: Konrad Wilk <konrad.w...@oracle.com> CC: Tim Deegan <t...@xen.org> CC: Julien Grall <julien.gr...@arm.com> --- SUPPORT.md | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/SUPPORT.md b/SUPPORT.md index df429cb3c4..dd3632b913 100644 --- a/SUPPORT.md +++ b/SUPPORT.md @@ -196,6 +196,33 @@ on embedded platforms. Enables NUMA aware scheduling in Xen +## Scalability + +### Super page support + + Status, x86 HVM/PVH, HAP: Supported + Status, x86 HVM/PVH, Shadow, 2MiB: Supported + Status, ARM: Supported + +NB that this refers to the ability of guests +to have higher-level page table entries point directly to memory, +improving TLB performance. +On ARM, and on x86 in HAP mode, +the guest has whatever support is enabled by the hardware. +On x86 in shadow mode, only 2MiB (L2) superpages are available; +furthermore, they do not have the performance characteristics of hardware superpages. + +Also note is feature independent of the ARM "page granularity" feature (see below). + +### x86/PVHVM + + Status: Supported + +This is a useful label for a set of hypervisor features +which add paravirtualized functionality to HVM guests +for improved performance and scalability. +This includes exposing event channels to HVM guests. + # Format and definitions This file contains prose, and machine-readable fragments. -- 2.15.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
