[v14,103/113] KVM: TDX: Add a method to ignore dirty logging

Commit Message

Isaku Yamahata May 29, 2023, 4:20 a.m. UTC

From: Isaku Yamahata <[e-mail]>

Currently TDX KVM doesn't support tracking dirty pages (yet).  Implement a
method to ignore it.  Because the flag for kvm memory slot to enable dirty
logging isn't accepted for TDX, warn on the method is called for TDX.

Signed-off-by: Isaku Yamahata <[e-mail]>
---
 arch/x86/kvm/vmx/main.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

Patch

diff --git a/arch/x86/kvm/vmx/main.c b/arch/x86/kvm/vmx/main.c
index 9c854b5c856b..12872225af18 100644
--- a/arch/x86/kvm/vmx/main.c
+++ b/arch/x86/kvm/vmx/main.c
@@ -827,6 +827,14 @@  static u8 vt_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
 	return vmx_get_mt_mask(vcpu, gfn, is_mmio);
 }
 
+static void vt_update_cpu_dirty_logging(struct kvm_vcpu *vcpu)
+{
+	if (KVM_BUG_ON(is_td_vcpu(vcpu), vcpu->kvm))
+		return;
+
+	vmx_update_cpu_dirty_logging(vcpu);
+}
+
 static int vt_mem_enc_ioctl(struct kvm *kvm, void __user *argp)
 {
 	if (!is_td(kvm))
@@ -971,7 +979,7 @@  struct kvm_x86_ops vt_x86_ops __initdata = {
 	.sched_in = vt_sched_in,
 
 	.cpu_dirty_log_size = PML_ENTITY_NUM,
-	.update_cpu_dirty_logging = vmx_update_cpu_dirty_logging,
+	.update_cpu_dirty_logging = vt_update_cpu_dirty_logging,
 
 	.nested_ops = &vmx_nested_ops,