Re: [PATCH] kvm: vmx: Scrub hardware GPRs at VM-exit

[Wanpeng Li <kernellwp@xxxxxxxxx>]

2018-01-04 6:31 GMT+08:00 Jim Mattson <jmattson@xxxxxxxxxx>:
[...]
> +               "xor %%r8d,  %%r8d \n\t"
> +               "xor %%r9d,  %%r9d \n\t"
> +               "xor %%r10d, %%r10d \n\t"
> +               "xor %%r11d, %%r11d \n\t"
> +               "xor %%r12d, %%r12d \n\t"
> +               "xor %%r13d, %%r13d \n\t"
> +               "xor %%r14d, %%r14d \n\t"
> +               "xor %%r15d, %%r15d \n\t"

Why just the low 32-bit of the R8~R15?

Regards,
Wanpeng Li