lkml.org 
[lkml]   [2017]   [Aug]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v3 2/5] KVM: MMU: check guest CR3 reserved bits based on its physical address width.
From
Date
On 24/08/2017 14:27, Yu Zhang wrote:
> diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
> index 3ed6192..67e7ec2 100644
> --- a/arch/x86/kvm/mmu.h
> +++ b/arch/x86/kvm/mmu.h
> @@ -48,6 +48,9 @@
>
> static inline u64 rsvd_bits(int s, int e)
> {
> + if (e < s)
> + return 0;
> +
> return ((1ULL << (e - s + 1)) - 1) << s;
> }

e = s - 1 is already supported; why do you need e <= s - 2?

Paolo

\
 
 \ /
  Last update: 2017-08-24 15:40    [W:0.079 / U:5.672 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site