lkml.org 
[lkml]   [2019]   [Aug]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Re: [PATCH] KVM/nSVM: properly map nested VMCB
From
Date
Hello,

On 04. 06. 19 19:27, Paolo Bonzini wrote:
> On 04/06/19 18:09, Vitaly Kuznetsov wrote:
>> Commit 8c5fbf1a7231 ("KVM/nSVM: Use the new mapping API for mapping guest
>> memory") broke nested SVM completely: kvm_vcpu_map()'s second parameter is
>> GFN so vmcb_gpa needs to be converted with gpa_to_gfn(), not the other way
>> around.
>>
>> Fixes: 8c5fbf1a7231 ("KVM/nSVM: Use the new mapping API for mapping guest memory")
>> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
>> ---
>> arch/x86/kvm/svm.c | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
>> index 735b8c01895e..5beca1030c9a 100644
>> --- a/arch/x86/kvm/svm.c
>> +++ b/arch/x86/kvm/svm.c
>> @@ -3293,7 +3293,7 @@ static int nested_svm_vmexit(struct vcpu_svm *svm)
>> vmcb->control.exit_int_info_err,
>> KVM_ISA_SVM);
>>
>> - rc = kvm_vcpu_map(&svm->vcpu, gfn_to_gpa(svm->nested.vmcb), &map);
>> + rc = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(svm->nested.vmcb), &map);
>> if (rc) {
>> if (rc == -EINVAL)
>> kvm_inject_gp(&svm->vcpu, 0);
>> @@ -3583,7 +3583,7 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm)
>>
>> vmcb_gpa = svm->vmcb->save.rax;
>>
>> - rc = kvm_vcpu_map(&svm->vcpu, gfn_to_gpa(vmcb_gpa), &map);
>> + rc = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(vmcb_gpa), &map);
>> if (rc) {
>> if (rc == -EINVAL)
>> kvm_inject_gp(&svm->vcpu, 0);
>>
> Oops. Queued, thanks.

Given that this fix didn't make it to 5.2, and its straightforwardness,
could you send it to stable for inclusion?

Regards

    Jiri Palecek


\
 
 \ /
  Last update: 2019-08-10 20:36    [W:0.044 / U:34.932 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site