On 22/01/19 15:59, Sean Christopherson wrote: > On Tue, Jan 22, 2019 at 01:35:41PM +0100, Paolo Bonzini wrote: >> On 18/01/19 22:20, Sean Christopherson wrote: >>> ...and of course actually call it from C now that the assembly code is >>> in a dedicated sub-routine and has been cleansed of any quirks that >>> would break compliance with the kernel's x86 calling conventions. >> >> I'm not sure about removing the clobbering. If the stack is outside L1, >> could this lead to speculative execution with the guest values in the >> registers? > > The stack belongs to the L0 kernel. Or did I misunderstand the comment? I meant outside L1 cache (overloaded terms... :)). Paolo
