[RFC PATCH v6 70/92] kvm: x86: filter out access rights only when tracked by the introspection tool
From: Adalbert Lazăr <hidden>
Date: 2019-08-09 16:04:44
Also in:
kvm, linux-mm
Subsystem:
kernel virtual machine for x86 (kvm/x86), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Sean Christopherson, Paolo Bonzini, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
It should complete the commit fd34a9518173 ("kvm: x86: consult the page tracking from kvm_mmu_get_page() and __direct_map()")
Signed-off-by: Adalbert Lazăr <redacted>
---
arch/x86/kvm/mmu.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 65b6acba82da..fd64cf1115da 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c@@ -2660,6 +2660,9 @@ static void clear_sp_write_flooding_count(u64 *spte) static unsigned int kvm_mmu_page_track_acc(struct kvm_vcpu *vcpu, gfn_t gfn, unsigned int acc) { + if (!kvmi_tracked_gfn(vcpu, gfn)) + return acc; + if (kvm_page_track_is_active(vcpu, gfn, KVM_PAGE_TRACK_PREREAD)) acc &= ~ACC_USER_MASK; if (kvm_page_track_is_active(vcpu, gfn, KVM_PAGE_TRACK_PREWRITE) ||
_______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization