Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

On Wed, Sep 21, 2016 at 3:03 AM, Jan Beulich wrote: On 20.09.16 at 17:54, wrote: >> On Tue, Sep 20, 2016 at 9:39 AM, Jan Beulich wrote: >> On 20.09.16 at 17:14, wrote: On Tue, Sep 20, 2016 at 9:12 AM, Jan Beulich wrote: On 20.09.16 at 16:56, wrote: >> On Tue, Sep 20

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

>>> On 20.09.16 at 17:54, wrote: > On Tue, Sep 20, 2016 at 9:39 AM, Jan Beulich wrote: > On 20.09.16 at 17:14, wrote: >>> On Tue, Sep 20, 2016 at 9:12 AM, Jan Beulich wrote: >>> On 20.09.16 at 16:56, wrote: > On Tue, Sep 20, 2016 at 1:26 AM, Jan Beulich wrote: > On 19.09.1

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

On Tue, Sep 20, 2016 at 9:39 AM, Jan Beulich wrote: On 20.09.16 at 17:14, wrote: >> On Tue, Sep 20, 2016 at 9:12 AM, Jan Beulich wrote: >> On 20.09.16 at 16:56, wrote: On Tue, Sep 20, 2016 at 1:26 AM, Jan Beulich wrote: On 19.09.16 at 20:27, wrote: >> On Mon, Sep 19

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

>>> On 20.09.16 at 17:14, wrote: > On Tue, Sep 20, 2016 at 9:12 AM, Jan Beulich wrote: > On 20.09.16 at 16:56, wrote: >>> On Tue, Sep 20, 2016 at 1:26 AM, Jan Beulich wrote: >>> On 19.09.16 at 20:27, wrote: > On Mon, Sep 19, 2016 at 2:19 AM, Jan Beulich wrote: > On 15.09.1

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

On Mon, Sep 19, 2016 at 6:36 PM, Tian, Kevin wrote: >> From: Tamas K Lengyel >> Sent: Tuesday, September 20, 2016 12:40 AM >> >> >> --- a/xen/arch/x86/hvm/hvm.c >> >> +++ b/xen/arch/x86/hvm/hvm.c >> >> @@ -489,13 +489,16 @@ void hvm_do_resume(struct vcpu *v) >> >> >> >> if ( v->arch.v

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

On Tue, Sep 20, 2016 at 9:12 AM, Jan Beulich wrote: On 20.09.16 at 16:56, wrote: >> On Tue, Sep 20, 2016 at 1:26 AM, Jan Beulich wrote: >> On 19.09.16 at 20:27, wrote: On Mon, Sep 19, 2016 at 2:19 AM, Jan Beulich wrote: On 15.09.16 at 18:51, wrote: >> @@ -1793,7 +17

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

>>> On 20.09.16 at 16:56, wrote: > On Tue, Sep 20, 2016 at 1:26 AM, Jan Beulich wrote: > On 19.09.16 at 20:27, wrote: >>> On Mon, Sep 19, 2016 at 2:19 AM, Jan Beulich wrote: >>> On 15.09.16 at 18:51, wrote: > @@ -1793,7 +1793,17 @@ static int _hvm_emulate_one(struct hvm_emulate_ctx

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

On 09/20/2016 05:56 PM, Tamas K Lengyel wrote: > On Tue, Sep 20, 2016 at 1:26 AM, Jan Beulich wrote: > On 19.09.16 at 20:27, wrote: >>> On Mon, Sep 19, 2016 at 2:19 AM, Jan Beulich wrote: >>> On 15.09.16 at 18:51, wrote: > @@ -1793,7 +1793,17 @@ static int _hvm_emulate_one(struct hv

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

On Tue, Sep 20, 2016 at 1:26 AM, Jan Beulich wrote: On 19.09.16 at 20:27, wrote: >> On Mon, Sep 19, 2016 at 2:19 AM, Jan Beulich wrote: >> On 15.09.16 at 18:51, wrote: @@ -1793,7 +1793,17 @@ static int _hvm_emulate_one(struct hvm_emulate_ctxt >> *hvmemul_ctxt, pfec |

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

>>> On 19.09.16 at 20:27, wrote: > On Mon, Sep 19, 2016 at 2:19 AM, Jan Beulich wrote: > On 15.09.16 at 18:51, wrote: >>> @@ -1793,7 +1793,17 @@ static int _hvm_emulate_one(struct hvm_emulate_ctxt > *hvmemul_ctxt, >>> pfec |= PFEC_user_mode; >>> >>> hvmemul_ctxt->insn_buf_eip

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

> From: Tamas K Lengyel > Sent: Tuesday, September 20, 2016 12:40 AM > > >> --- a/xen/arch/x86/hvm/hvm.c > >> +++ b/xen/arch/x86/hvm/hvm.c > >> @@ -489,13 +489,16 @@ void hvm_do_resume(struct vcpu *v) > >> > >> if ( v->arch.vm_event->emulate_flags & > >> VM_EVENT_FLA

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

On Mon, Sep 19, 2016 at 2:19 AM, Jan Beulich wrote: On 15.09.16 at 18:51, wrote: >> @@ -1793,7 +1793,17 @@ static int _hvm_emulate_one(struct hvm_emulate_ctxt >> *hvmemul_ctxt, >> pfec |= PFEC_user_mode; >> >> hvmemul_ctxt->insn_buf_eip = regs->eip; >> -if ( !vio->mmio_ins

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

On Mon, Sep 19, 2016 at 2:19 AM, Jan Beulich wrote: On 15.09.16 at 18:51, wrote: >> @@ -1793,7 +1793,17 @@ static int _hvm_emulate_one(struct hvm_emulate_ctxt >> *hvmemul_ctxt, >> pfec |= PFEC_user_mode; >> >> hvmemul_ctxt->insn_buf_eip = regs->eip; >> -if ( !vio->mmio_ins

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

>>> On 15.09.16 at 18:51, wrote: > @@ -1793,7 +1793,17 @@ static int _hvm_emulate_one(struct hvm_emulate_ctxt > *hvmemul_ctxt, > pfec |= PFEC_user_mode; > > hvmemul_ctxt->insn_buf_eip = regs->eip; > -if ( !vio->mmio_insn_bytes ) > + > +if ( unlikely(hvmemul_ctxt->set_conte

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

On Sat, Sep 17, 2016 at 10:40 AM, Razvan Cojocaru wrote: > On 09/15/16 19:51, Tamas K Lengyel wrote: >> When emulating instructions Xen's emulator maintains a small i-cache fetched >> from the guest memory. This patch extends the vm_event interface to allow >> overwriting this i-cache via a buffer

Re: [Xen-devel] [PATCH v2 2/2] x86/vm_event: Allow overwriting Xen's i-cache used for emulation

On 09/15/16 19:51, Tamas K Lengyel wrote: > When emulating instructions Xen's emulator maintains a small i-cache fetched > from the guest memory. This patch extends the vm_event interface to allow > overwriting this i-cache via a buffer returned in the vm_event response. > > When responding to a S