On 02/13/2014 04:45 AM, Fengguang Wu wrote:
> Greetings,
>
> I find that when running
>
> qemu-system-x86_64 -cpu qemu64,+smep,+smap
>
> Some kernels will 100% produce this error, where the error code
> -13,-14 are -EACCES and -EFAULT:
>
> Any ideas?
>
I notice this is a non-SMAP kernel:
# CONFIG_X86_SMAP is not set
If the kernel turns on SMAP in CR4 even though SMAP isn't enabled in the
kernel, that is a kernel bug. If Qemu enforces SMAP even if it is
turned off in CR4, that would be a Qemu bug. I have reproduced the
failure locally and an am considering both possibilities now.
-hpa
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
