Re: [Xen-devel] [PATCH for-4.12 v4 3/4] xen/arm: Implement Set/Way operations

2018-12-18 Thread Stefano Stabellini
On Tue, 18 Dec 2018, Julien Grall wrote: > Set/Way operations are used to perform maintenance on a given cache. > At the moment, Set/Way operations are not trapped and therefore a guest > OS will directly act on the local cache. However, a vCPU may migrate to > another pCPU in the middle of the pro

[Xen-devel] [PATCH for-4.12 v4 3/4] xen/arm: Implement Set/Way operations

2018-12-18 Thread Julien Grall
Set/Way operations are used to perform maintenance on a given cache. At the moment, Set/Way operations are not trapped and therefore a guest OS will directly act on the local cache. However, a vCPU may migrate to another pCPU in the middle of the processor. This will result to have cache with stale