Re: [Xen-devel] [PATCH v3] x86: fix a crash in SPEC_CTRL_ENTRY_FROM_INTR_IST

在 2018/2/14 17:58, Jan Beulich 写道: On 14.02.18 at 10:25, wrote: --- a/xen/include/asm-x86/spec_ctrl_asm.h +++ b/xen/include/asm-x86/spec_ctrl_asm.h @@ -269,28 +269,29 @@ * This is logical merge of DO_OVERWRITE_RSB and DO_SPEC_CTRL_ENTRY * maybexen=1, but with

[Xen-devel] [PATCH v3] x86: fix a crash in SPEC_CTRL_ENTRY_FROM_INTR_IST

In an IBRS available env, bootup panic when bti=0 like below: (XEN) Speculative mitigation facilities: (XEN) Hardware features: SMEP IBRS/IBPB STIBP (XEN) BTI mitigations: Thunk N/A, Others: IBRS- SMEP (XEN) [ Xen-4.4.4OVM x86_64 debug=n Tainted:C ] (XEN) CPU:0 (XEN) RIP: