The VT-x task switch handler adds inst_len to rip before calling
hvm_task_switch(). This causes early faults to be delivered to the guest with
trap semantics, and break restartibility.
Instead, pass the instruction length into hvm_task_switch() and write it into
the outgoing tss only, leaving rip
On Thu, Nov 21, 2019 at 10:15:50PM +, Andrew Cooper wrote:
> The VT-x task switch handler adds inst_len to rip before calling
> hvm_task_switch(). This causes early faults to be delivered to the guest with
By early faults you mean faults injected by hvm_task_switch itself for
example?
> trap
On 22/11/2019 12:37, Roger Pau Monné wrote:
> On Thu, Nov 21, 2019 at 10:15:50PM +, Andrew Cooper wrote:
>> The VT-x task switch handler adds inst_len to rip before calling
>> hvm_task_switch(). This causes early faults to be delivered to the guest
>> with
> By early faults you mean faults in
On 22.11.2019 13:37, Roger Pau Monné wrote:
> On Thu, Nov 21, 2019 at 10:15:50PM +, Andrew Cooper wrote:
>> The VT-x task switch handler adds inst_len to rip before calling
>> hvm_task_switch(). This causes early faults to be delivered to the guest
>> with
>> trap semantics, and break restar
On 22/11/2019 13:08, Jan Beulich wrote:
> On 22.11.2019 13:37, Roger Pau Monné wrote:
>> On Thu, Nov 21, 2019 at 10:15:50PM +, Andrew Cooper wrote:
>>> The VT-x task switch handler adds inst_len to rip before calling
>>> hvm_task_switch(). This causes early faults to be delivered to the guest
On 22.11.2019 14:12, Andrew Cooper wrote:
> On 22/11/2019 13:08, Jan Beulich wrote:
>> On 22.11.2019 13:37, Roger Pau Monné wrote:
>>> On Thu, Nov 21, 2019 at 10:15:50PM +, Andrew Cooper wrote:
The VT-x task switch handler adds inst_len to rip before calling
hvm_task_switch(). This
On 22/11/2019 13:39, Jan Beulich wrote:
> On 22.11.2019 14:12, Andrew Cooper wrote:
>> On 22/11/2019 13:08, Jan Beulich wrote:
>>> On 22.11.2019 13:37, Roger Pau Monné wrote:
On Thu, Nov 21, 2019 at 10:15:50PM +, Andrew Cooper wrote:
> The VT-x task switch handler adds inst_len to rip
> From: Andrew Cooper [mailto:andrew.coop...@citrix.com]
> Sent: Friday, November 22, 2019 6:16 AM
>
> The VT-x task switch handler adds inst_len to rip before calling
> hvm_task_switch(). This causes early faults to be delivered to the guest
> with
> trap semantics, and break restartibility.
>
