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Message-Id: <9fd3d613e0e83a8828b3529fe3954bcb4cb9f400.1673539699.git.isaku.yamahata@intel.com>
Date: Thu, 12 Jan 2023 08:31:57 -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>,
Yan Zhao <yan.y.zhao@...el.com>,
Yuan Yao <yuan.yao@...ux.intel.com>
Subject: [PATCH v11 049/113] KVM: x86/mmu: TDX: Do not enable page track for TD guest
From: Yan Zhao <yan.y.zhao@...el.com>
TDX does not support write protection and hence page track.
Though !tdp_enabled and kvm_shadow_root_allocated(kvm) are always false
for TD guest, should also return false when external write tracking is
enabled.
Cc: Yuan Yao <yuan.yao@...ux.intel.com>
Signed-off-by: Yan Zhao <yan.y.zhao@...el.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
---
arch/x86/kvm/mmu/page_track.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/kvm/mmu/page_track.c b/arch/x86/kvm/mmu/page_track.c
index 0a2ac438d647..571c2c40004a 100644
--- a/arch/x86/kvm/mmu/page_track.c
+++ b/arch/x86/kvm/mmu/page_track.c
@@ -22,6 +22,9 @@
bool kvm_page_track_write_tracking_enabled(struct kvm *kvm)
{
+ if (kvm->arch.vm_type == KVM_X86_TDX_VM)
+ return false;
+
return IS_ENABLED(CONFIG_KVM_EXTERNAL_WRITE_TRACKING) ||
!tdp_enabled || kvm_shadow_root_allocated(kvm);
}
--
2.25.1
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