linux-kernel - [RFC PATCH 33/67] KVM: Export kvm_is_reserved

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Message-Id: <166f7cdaac4eadf86615bcc508164235e13d76b7.1605232743.git.isaku.yamahata@intel.com>
Date:   Mon, 16 Nov 2020 10:26:18 -0800
From:   isaku.yamahata@...el.com
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     isaku.yamahata@...el.com, isaku.yamahata@...il.com,
        Sean Christopherson <sean.j.christopherson@...el.com>
Subject: [RFC PATCH 33/67] KVM: Export kvm_is_reserved_pfn() for use by TDX

From: Sean Christopherson <sean.j.christopherson@...el.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@...el.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 aa5f27753756..a60dcf682f33 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -185,6 +185,7 @@ 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)
 {
-- 
2.17.1