Paolo Bonzini writes:
> On 01/04/21 15:03, Vitaly Kuznetsov wrote:
>>> + svm->sysenter_eip_hi = guest_cpuid_is_intel(vcpu) ? (data >>
>>> 32) : 0;
>>
>> (Personal taste) I'd suggest we keep the whole 'sysenter_eip'/'sysenter_esp'
>> even if we only use the upper 32 bits of it. That
Maxim Levitsky writes:
> Currently to support Intel->AMD migration, if CPU vendor is GenuineIntel,
> we emulate the full 64 value for MSR_IA32_SYSENTER_{EIP|ESP}
> msrs, and we also emulate the sysenter/sysexit instruction in long mode.
>
> (Emulator does still refuse to emulate sysenter in 64
On 01/04/21 17:31, Vitaly Kuznetsov wrote:
+ svm->sysenter_eip_hi = guest_cpuid_is_intel(vcpu) ? (data >>
32) : 0;
(Personal taste) I'd suggest we keep the whole 'sysenter_eip'/'sysenter_esp'
even if we only use the upper 32 bits of it. That would reduce the code
churn a little
On 01/04/21 15:03, Vitaly Kuznetsov wrote:
+ svm->sysenter_eip_hi = guest_cpuid_is_intel(vcpu) ? (data >>
32) : 0;
(Personal taste) I'd suggest we keep the whole 'sysenter_eip'/'sysenter_esp'
even if we only use the upper 32 bits of it. That would reduce the code
churn a little
Currently to support Intel->AMD migration, if CPU vendor is GenuineIntel,
we emulate the full 64 value for MSR_IA32_SYSENTER_{EIP|ESP}
msrs, and we also emulate the sysenter/sysexit instruction in long mode.
(Emulator does still refuse to emulate sysenter in 64 bit mode, on the
ground that the
On Thu, 2021-04-01 at 15:03 +0200, Vitaly Kuznetsov wrote:
> Maxim Levitsky writes:
>
> > Currently to support Intel->AMD migration, if CPU vendor is GenuineIntel,
> > we emulate the full 64 value for MSR_IA32_SYSENTER_{EIP|ESP}
> > msrs, and we also emulate the sysenter/sysexit instruction in
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