On 23/11/15 15:24, Jan Beulich wrote:
On 23.11.15 at 16:01, wrote:
>> On 23/11/15 12:49, Jan Beulich wrote:
>>> @@ -1525,6 +1516,16 @@ static void vmx_inject_trap(struct hvm_t
>>> __restore_debug_registers(curr);
>>> write_debugreg(6, read_debugreg(6) | DR_STEP);
>>>
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: Monday, November 23, 2015 8:49 PM
>
> In the course of investigating the 4.1.6 backport issue of the XSA-156
> patch I realized that #DB injection has always been broken, but with it
> now getting always intercepted the problem has got worse:
>>> On 23.11.15 at 16:01, wrote:
> On 23/11/15 12:49, Jan Beulich wrote:
>> @@ -1525,6 +1516,16 @@ static void vmx_inject_trap(struct hvm_t
>> __restore_debug_registers(curr);
>> write_debugreg(6, read_debugreg(6) | DR_STEP);
>> }
>> +if ( !nestedhvm_vcpu
On 23/11/15 12:49, Jan Beulich wrote:
> In the course of investigating the 4.1.6 backport issue of the XSA-156
> patch I realized that #DB injection has always been broken, but with it
> now getting always intercepted the problem has got worse: Documentation
> clearly states that neither DR7.GD nor
