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From: Sean Christopherson <seanjc@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Like Xu <like.xu.linux@gmail.com>
Subject: [PATCH 09/22] KVM: x86: Uninline and export hv_track_root_tdp()
Date: Fri, 28 Jan 2022 00:51:55 +0000	[thread overview]
Message-ID: <20220128005208.4008533-10-seanjc@google.com> (raw)
In-Reply-To: <20220128005208.4008533-1-seanjc@google.com>

Uninline and export Hyper-V's hv_track_root_tdp(), which is (somewhat
indirectly) the last remaining reference to kvm_x86_ops from vendor
modules, i.e. will allow unexporting kvm_x86_ops.  Reloading the TDP PGD
isn't the fastest of paths, hv_track_root_tdp() isn't exactly tiny, and
disallowing vendor code from accessing kvm_x86_ops provides nice-to-have
encapsulation of common x86 code (and of Hyper-V code for that matter).

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/kvm_onhyperv.c | 14 ++++++++++++++
 arch/x86/kvm/kvm_onhyperv.h | 14 +-------------
 2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/arch/x86/kvm/kvm_onhyperv.c b/arch/x86/kvm/kvm_onhyperv.c
index b469f45e3fe4..ee4f696a0782 100644
--- a/arch/x86/kvm/kvm_onhyperv.c
+++ b/arch/x86/kvm/kvm_onhyperv.c
@@ -92,3 +92,17 @@ int hv_remote_flush_tlb(struct kvm *kvm)
 	return hv_remote_flush_tlb_with_range(kvm, NULL);
 }
 EXPORT_SYMBOL_GPL(hv_remote_flush_tlb);
+
+void hv_track_root_tdp(struct kvm_vcpu *vcpu, hpa_t root_tdp)
+{
+	struct kvm_arch *kvm_arch = &vcpu->kvm->arch;
+
+	if (kvm_x86_ops.tlb_remote_flush == hv_remote_flush_tlb) {
+		spin_lock(&kvm_arch->hv_root_tdp_lock);
+		vcpu->arch.hv_root_tdp = root_tdp;
+		if (root_tdp != kvm_arch->hv_root_tdp)
+			kvm_arch->hv_root_tdp = INVALID_PAGE;
+		spin_unlock(&kvm_arch->hv_root_tdp_lock);
+	}
+}
+EXPORT_SYMBOL_GPL(hv_track_root_tdp);
diff --git a/arch/x86/kvm/kvm_onhyperv.h b/arch/x86/kvm/kvm_onhyperv.h
index 1c67abf2eba9..287e98ef9df3 100644
--- a/arch/x86/kvm/kvm_onhyperv.h
+++ b/arch/x86/kvm/kvm_onhyperv.h
@@ -10,19 +10,7 @@
 int hv_remote_flush_tlb_with_range(struct kvm *kvm,
 		struct kvm_tlb_range *range);
 int hv_remote_flush_tlb(struct kvm *kvm);
-
-static inline void hv_track_root_tdp(struct kvm_vcpu *vcpu, hpa_t root_tdp)
-{
-	struct kvm_arch *kvm_arch = &vcpu->kvm->arch;
-
-	if (kvm_x86_ops.tlb_remote_flush == hv_remote_flush_tlb) {
-		spin_lock(&kvm_arch->hv_root_tdp_lock);
-		vcpu->arch.hv_root_tdp = root_tdp;
-		if (root_tdp != kvm_arch->hv_root_tdp)
-			kvm_arch->hv_root_tdp = INVALID_PAGE;
-		spin_unlock(&kvm_arch->hv_root_tdp_lock);
-	}
-}
+void hv_track_root_tdp(struct kvm_vcpu *vcpu, hpa_t root_tdp);
 #else /* !CONFIG_HYPERV */
 static inline void hv_track_root_tdp(struct kvm_vcpu *vcpu, hpa_t root_tdp)
 {
-- 
2.35.0.rc0.227.g00780c9af4-goog


  parent reply	other threads:[~2022-01-28  0:53 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-28  0:51 [PATCH 00/22] KVM: x86: Fill *_x86_ops via kvm-x86-ops.h Sean Christopherson
2022-01-28  0:51 ` [PATCH 01/22] KVM: x86: Drop unnecessary and confusing KVM_X86_OP_NULL macro Sean Christopherson
2022-01-28 10:11   ` Paolo Bonzini
2022-01-28 15:42     ` Sean Christopherson
2022-01-31 14:56       ` Paolo Bonzini
2022-01-31 15:19         ` Maxim Levitsky
2022-01-31 16:48         ` Sean Christopherson
2022-01-28  0:51 ` [PATCH 02/22] KVM: x86: Move delivery of non-APICv interrupt into vendor code Sean Christopherson
2022-01-28  0:51 ` [PATCH 03/22] KVM: x86: Drop export for .tlb_flush_current() static_call key Sean Christopherson
2022-01-28  0:51 ` [PATCH 04/22] KVM: x86: Rename kvm_x86_ops pointers to align w/ preferred vendor names Sean Christopherson
2022-01-28  0:51 ` [PATCH 05/22] KVM: x86: Use static_call() for .vcpu_deliver_sipi_vector() Sean Christopherson
2022-01-28  0:51 ` [PATCH 06/22] KVM: VMX: Call vmx_get_cpl() directly in handle_dr() Sean Christopherson
2022-01-28  0:51 ` [PATCH 07/22] KVM: xen: Use static_call() for invoking kvm_x86_ops hooks Sean Christopherson
2022-01-28  0:51 ` [PATCH 08/22] KVM: nVMX: Refactor PMU refresh to avoid referencing kvm_x86_ops.pmu_ops Sean Christopherson
2022-01-28  0:51 ` Sean Christopherson [this message]
2022-01-31 16:19   ` [PATCH 09/22] KVM: x86: Uninline and export hv_track_root_tdp() Vitaly Kuznetsov
2022-01-28  0:51 ` [PATCH 10/22] KVM: x86: Unexport kvm_x86_ops Sean Christopherson
2022-01-28  0:51 ` [PATCH 11/22] KVM: x86: Use static_call() for copy/move encryption context ioctls() Sean Christopherson
2022-01-28  0:51 ` [PATCH 12/22] KVM: x86: Allow different macros for APICv, CVM, and Hyper-V kvm_x86_ops Sean Christopherson
2022-01-28  0:51 ` [PATCH 13/22] KVM: VMX: Rename VMX functions to conform to kvm_x86_ops names Sean Christopherson
2022-01-28  0:52 ` [PATCH 14/22] KVM: VMX: Use kvm-x86-ops.h to fill vmx_x86_ops Sean Christopherson
2022-01-28  0:52 ` [PATCH 15/22] KVM: x86: Move get_cs_db_l_bits() helper to SVM Sean Christopherson
2022-01-28  0:52 ` [PATCH 16/22] KVM: SVM: Rename svm_flush_tlb() to svm_flush_tlb_current() Sean Christopherson
2022-01-28  0:52 ` [PATCH 17/22] KVM: SVM: Remove unused MAX_INST_SIZE #define Sean Christopherson
2022-01-28  0:52 ` [PATCH 18/22] KVM: SVM: Rename AVIC helpers to use "avic" prefix instead of "svm" Sean Christopherson
2022-01-28  0:52 ` [PATCH 19/22] KVM: x86: Use more verbose names for mem encrypt kvm_x86_ops hooks Sean Christopherson
2022-01-28  0:52 ` [PATCH 20/22] KVM: SVM: Rename SEV implemenations to conform to " Sean Christopherson
2022-01-28  0:52 ` [PATCH 21/22] KVM: SVM: Rename hook implementations to conform to kvm_x86_ops' names Sean Christopherson
2022-01-28  0:52 ` [PATCH 22/22] KVM: SVM: Use kvm-x86-ops.h to fill svm_x86_ops Sean Christopherson

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