>>> On 08.02.18 at 09:51, wrote:
> On 02/07/2018 07:42 PM, Razvan Cojocaru wrote:
>> On 02/07/2018 07:01 PM, Jan Beulich wrote:
--- a/xen/include/asm-x86/hvm/hvm.h
+++ b/xen/include/asm-x86/hvm/hvm.h
@@ -34,6 +34,9 @@ extern bool_t opt_hvm_fep;
#define opt_hvm_fep 0
#end
On 02/07/2018 07:42 PM, Razvan Cojocaru wrote:
> On 02/07/2018 07:01 PM, Jan Beulich wrote:
>>> --- a/xen/include/asm-x86/hvm/hvm.h
>>> +++ b/xen/include/asm-x86/hvm/hvm.h
>>> @@ -34,6 +34,9 @@ extern bool_t opt_hvm_fep;
>>> #define opt_hvm_fep 0
>>> #endif
>>>
>>> +#define X86_CR3_NOFLUSH (1ul
On 02/07/2018 07:01 PM, Jan Beulich wrote:
On 02.02.18 at 09:14, wrote:
>> @@ -2313,6 +2314,12 @@ int hvm_set_cr3(unsigned long value, bool_t may_defer)
>> }
>> }
>>
>> +if ( hvm_pcid_enabled(v) ) /* Clear the noflush bit. */
>> +{
>> +noflush = !!(value & X86_
>>> On 02.02.18 at 09:14, wrote:
> @@ -2313,6 +2314,12 @@ int hvm_set_cr3(unsigned long value, bool_t may_defer)
> }
> }
>
> +if ( hvm_pcid_enabled(v) ) /* Clear the noflush bit. */
> +{
> +noflush = !!(value & X86_CR3_NOFLUSH);
Pointless !!.
> --- a/xen/include/a
On Fri, Feb 2, 2018 at 1:14 AM, Razvan Cojocaru
wrote:
> The emulation layers of Xen lack PCID support, and as we only offer
> PCID to HAP guests, all writes to CR3 are handled by hardware,
> except when introspection is involved. Consequently, trying to set
> CR3 when the noflush bit is set in hv
The emulation layers of Xen lack PCID support, and as we only offer
PCID to HAP guests, all writes to CR3 are handled by hardware,
except when introspection is involved. Consequently, trying to set
CR3 when the noflush bit is set in hvm_set_cr3() leads to domain
crashes. The workaround is to clear
