linux-kernel - [RFC PATCH 42/42] KVM: VMX: Notify importers of exported TDP to flush TLBs on KVM flushes EPT

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Message-Id: <20231202093712.16049-1-yan.y.zhao@intel.com>
Date:   Sat,  2 Dec 2023 17:37:12 +0800
From:   Yan Zhao <yan.y.zhao@...el.com>
To:     iommu@...ts.linux.dev, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     alex.williamson@...hat.com, jgg@...dia.com, pbonzini@...hat.com,
        seanjc@...gle.com, joro@...tes.org, will@...nel.org,
        robin.murphy@....com, kevin.tian@...el.com,
        baolu.lu@...ux.intel.com, dwmw2@...radead.org, yi.l.liu@...el.com,
        Yan Zhao <yan.y.zhao@...el.com>
Subject: [RFC PATCH 42/42] KVM: VMX: Notify importers of exported TDP to flush TLBs on KVM flushes EPT

Call TDP FD helper to notify importers of exported TDP to flush TLBs when
KVM flushes EPT.

Signed-off-by: Yan Zhao <yan.y.zhao@...el.com>
---
 arch/x86/kvm/vmx/vmx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 2fec351a3fa5b..3a2b6ddcde108 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7547,6 +7547,9 @@ static int vmx_vcpu_create(struct kvm_vcpu *vcpu)
 static int vmx_flush_remote_tlbs_range(struct kvm *kvm, gfn_t gfn, gfn_t nr_pages)
 {
 	kvm_make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH);
+#if IS_ENABLED(CONFIG_KVM_INTEL_EXPORTED_EPT)
+	kvm_tdp_fd_flush_notify(kvm, gfn, nr_pages);
+#endif
 	return 0;
 }
 
-- 
2.17.1