Re: [Xen-devel] [PATCH v2] x86: fix a crash in SPEC_CTRL_ENTRY_FROM_INTR_IST

2018-02-14 Thread Roger Pau Monné
On Wed, Feb 14, 2018 at 01:09:28AM -0700, Jan Beulich wrote: > 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) [

Re: [Xen-devel] [PATCH v2] x86: fix a crash in SPEC_CTRL_ENTRY_FROM_INTR_IST

2018-02-14 Thread Zhenzhong Duan
在 2018/2/14 16:09, Jan Beulich 写道: 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-devel] [PATCH v2] x86: fix a crash in SPEC_CTRL_ENTRY_FROM_INTR_IST

2018-02-14 Thread Jan Beulich
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: