On 10.03.2020 03:39, Tian, Kevin wrote:
>> From: Jan Beulich
>> Sent: Tuesday, March 3, 2020 6:17 PM
>>
>> Emulation requiring device model assistance uses a form of instruction
>> re-execution, assuming that the second (and any further) pass takes
>> exactly the same path. This is a valid
> From: Jan Beulich
> Sent: Tuesday, March 3, 2020 6:17 PM
>
> Emulation requiring device model assistance uses a form of instruction
> re-execution, assuming that the second (and any further) pass takes
> exactly the same path. This is a valid assumption as far as use of CPU
ah, I was not
> -Original Message-
> From: Jan Beulich
> Sent: 03 March 2020 15:24
> To: Durrant, Paul
> Cc: xen-devel@lists.xenproject.org; Kevin Tian ; Wei
> Liu ; Paul
> Durrant ; Andrew Cooper ; Jun
> Nakajima
> ; Roger Pau Monné
> Subject: RE: [EXTERNAL][PATCH v5 2/4] x86/HVM: implement memory
> -Original Message-
> From: Xen-devel On Behalf Of Jan
> Beulich
> Sent: 03 March 2020 10:17
> To: xen-devel@lists.xenproject.org
> Cc: Kevin Tian ; Wei Liu ; Paul Durrant
> ; Andrew
> Cooper ; Jun Nakajima ;
> Roger Pau Monné
>
> Subject: [EXTERNAL][
On 03.03.2020 16:16, Durrant, Paul wrote:
>> From: Xen-devel On Behalf Of Jan
>> Beulich
>> Sent: 03 March 2020 10:17
>>
>> --- a/xen/arch/x86/hvm/emulate.c
>> +++ b/xen/arch/x86/hvm/emulate.c
>> @@ -28,6 +28,19 @@
>> #include
>> #include
>>
>> +struct hvmemul_cache
>> +{
>> +/* The
Emulation requiring device model assistance uses a form of instruction
re-execution, assuming that the second (and any further) pass takes
exactly the same path. This is a valid assumption as far as use of CPU
registers goes (as those can't change without any other instruction
executing in between
