|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 08/45] xen: arm64: spinlocks
On Thu, 2013-02-07 at 14:42 +0000, Tim Deegan wrote: > The 32-bit ones have a scattering of DSBs and SEVs that aren't there in > 64-bit. The DSBs at least seem useful. Not sure about SEV - presumably > that's useful if the slow path has a WFE in it? The "strl" in the 64 bit version is a store-release which has well defined ordering semantics vs the ldar stuff in the other half. The store in the 32-bit version is just a store so it needs barriers. Ian. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |