github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-01 19:13:47 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: SVM: Explicitly mark vmcb01 dirty after modifying VMCB intercepts

Browse Source 
When reacting to an intercept update, explicitly mark vmcb01's intercepts
dirty, as KVM always initially operates on vmcb01, and nested_svm_vmexit()
isn't guaranteed to mark VMCB_INTERCEPTS as dirty.  I.e. if L2 is active,
KVM will modify the intercepts for L1, but might not mark them as dirty
before the next VMRUN of L1.

Fixes: 116a0a2367 ("KVM: SVM: Add clean-bit for intercetps, tsc-offset and pause filter count")
Cc: stable@vger.kernel.org
Reviewed-by: Yosry Ahmed <yosry.ahmed@linux.dev>
Link: https://patch.msgid.link/20260218230958.2877682-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2026-02-18 15:09:51 -08:00
parent 7e79f71bca
commit d5bde6113a
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -128,11 +128,13 @@ void recalc_intercepts(struct vcpu_svm *svm)
struct vmcb_ctrl_area_cached *g;
unsigned int i;
vmcb_mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
vmcb_mark_dirty(svm->vmcb01.ptr, VMCB_INTERCEPTS);
if (!is_guest_mode(&svm->vcpu))
return;
vmcb_mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
c = &svm->vmcb->control;
h = &svm->vmcb01.ptr->control;
g = &svm->nested.ctl;