linux-kernel - [PATCH v11 025/113] KVM: TDX: Use private memory for TDX

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Message-Id: <4c3f5462852af9fd0957bb7db0b04a6f2d5639ee.1673539699.git.isaku.yamahata@intel.com>
Date:   Thu, 12 Jan 2023 08:31:33 -0800
From:   isaku.yamahata@...el.com
To:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     isaku.yamahata@...el.com, isaku.yamahata@...il.com,
        Paolo Bonzini <pbonzini@...hat.com>, erdemaktas@...gle.com,
        Sean Christopherson <seanjc@...gle.com>,
        Sagi Shahar <sagis@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Chao Peng <chao.p.peng@...ux.intel.com>
Subject: [PATCH v11 025/113] KVM: TDX: Use private memory for TDX

From: Chao Peng <chao.p.peng@...ux.intel.com>

Override kvm_arch_has_private_mem() to use fd-based private memory.
Return true when a VM has a type of KVM_X86_TDX_VM.

Signed-off-by: Chao Peng <chao.p.peng@...ux.intel.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
---
 arch/x86/kvm/x86.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index d548d3af6428..a8b555935fd8 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -13498,6 +13498,11 @@ int kvm_sev_es_string_io(struct kvm_vcpu *vcpu, unsigned int size,
 }
 EXPORT_SYMBOL_GPL(kvm_sev_es_string_io);
 
+bool kvm_arch_has_private_mem(struct kvm *kvm)
+{
+	return kvm->arch.vm_type == KVM_X86_TDX_VM;
+}
+
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_entry);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio);
-- 
2.25.1