Re: [PATCH] KVM: x86: don't expose syscall/sysret to intel 32-bit guest

[Wanpeng Li]

2015-11-19 19:05 GMT+08:00 Paolo Bonzini <pbonzini@xxxxxxxxxx>:
>
> 1) Clear F(SYSCALL) in kvm_update_cpuid, like you are doing here but
> only if F(LM) is already clear (in addition to the vendor being Intel).

It seems that F(LM) is always set in the case of qemu-system-x86_64 w/
32-bit guest, vmware also exposes LM bit to 32 bit guest(however it
doesn't expose syscall/sysret), so maybe we can't depend on F(LM).

Regards,
Wanpeng Li
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