Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-27 13:22:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

KVM: nSVM: Check for CR0.CD and CR0.NW on VMRUN of nested guests

Browse Source 
According to section "Canonicalization and Consistency Checks" in APM vol. 2,
the following guest state combination is illegal:

	"CR0.CD is zero and CR0.NW is set"

Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Message-Id: <20200409205035.16830-2-krish.sadhukhan@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Krish Sadhukhan 2020-04-09 16:50:33 -04:00 committed by Paolo Bonzini
parent a9ab13ff6e
commit 4f233371f6
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/kvm/svm/nested.c
View File

@ -207,6 +207,10 @@ static bool nested_vmcb_checks(struct vmcb *vmcb)
if ((vmcb->save.efer & EFER_SVME) == 0)
return false;
if (((vmcb->save.cr0 & X86_CR0_CD) == 0) &&
(vmcb->save.cr0 & X86_CR0_NW))
return false;
if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
return false;