lkml.org 
[lkml]   [2018]   [Feb]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [PATCH] KVM: X86: Fix SMRAM accessing even if VM is shutdown
    From
    Date


    On 02/09/2018 08:42 PM, Paolo Bonzini wrote:
    > On 09/02/2018 04:22, Xiao Guangrong wrote:
    >>>
    >>
    >> That is a good question... :)
    >>
    >> This case (with KVM_MEMSLOT_INVALID is set) can be easily constructed,
    >> userspace should avoid this case by itself (avoiding vCPU accessing the
    >> memslot which is being updated). If it happens, it's a operation issue
    >> rather than INTERNAL ERROR.
    >>
    >> Maybe treat it as MMIO accessing and return to userspace with MMIO_EXIT
    >> is a better solution...
    >
    > Yeah, that's what emulation would do (except if it's an instruction
    > fetch, which will cause emulation to fail). I think it's a bug in the
    > non-EPT #PF case that we return with -EFAULT.

    Wanpeng, could you please do it? :)

    \
     
     \ /
      Last update: 2018-02-11 04:20    [W:2.399 / U:0.128 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site