14 Aug
2013
14 Aug
'13
3:35 p.m.
On 14 August 2013 16:23, Marc Zyngier marc.zyngier@arm.com wrote:
On 2013-08-14 15:22, Anup Patel wrote:
It seems a bit unnatural to have cache cleaning is user-space. I am sure other architectures don't have such cache cleaning in user-space for KVM.
Well, we have it on AArch64. Why would we blindly nuke the whole cache if we can do the right thing, efficiently, on the right range?
When exactly would userspace have to care about the cache? This patch isn't exactly clear about the circumstances. I think you'd need a really strong reason for not dealing with this in the kernel -- in general userspace KVM tools don't otherwise have to deal with cache maintenance at all.
-- PMM