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From:   isaku.yamahata@intel.com
To:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H . Peter Anvin" <hpa@zytor.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Jim Mattson <jmattson@google.com>,
        Joerg Roedel <joro@8bytes.org>, erdemaktas@google.com,
        Connor Kuehl <ckuehl@redhat.com>,
        Sean Christopherson <seanjc@google.com>, x86@kernel.org,
        linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc:     isaku.yamahata@intel.com, isaku.yamahata@gmail.com,
        Sean Christopherson <sean.j.christopherson@intel.com>
Subject: [RFC PATCH v2 40/69] KVM: Export kvm_is_reserved_pfn() for use by TDX
Date:   Fri,  2 Jul 2021 15:04:46 -0700
Message-Id: <1ef40d74af89c4e347e46412a5d07f6e7eebf839.1625186503.git.isaku.yamahata@intel.com>
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From: Sean Christopherson <sean.j.christopherson@intel.com>

TDX will use kvm_is_reserved_pfn() to prevent installing a reserved PFN
int SEPT.  Or rather, to prevent such an attempt, as reserved PFNs are
not covered by TDMRs.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
---
 virt/kvm/kvm_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 8b075b5e7303..dd6492b526c9 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -188,6 +188,7 @@ bool kvm_is_reserved_pfn(kvm_pfn_t pfn)
 
 	return true;
 }
+EXPORT_SYMBOL_GPL(kvm_is_reserved_pfn);
 
 bool kvm_is_transparent_hugepage(kvm_pfn_t pfn)
 {
-- 
2.25.1