linux-kernel - [PATCH V3 10/12] KVM: X86/MMU: Remove unused INVALID_PAE_ROOT and IS_VALID_PAE

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Message-Id: <20220521131700.3661-11-jiangshanlai@gmail.com>
Date:   Sat, 21 May 2022 21:16:58 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>
Cc:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Lai Jiangshan <jiangshan.ljs@...group.com>
Subject: [PATCH V3 10/12] KVM: X86/MMU: Remove unused INVALID_PAE_ROOT and IS_VALID_PAE_ROOT

From: Lai Jiangshan <jiangshan.ljs@...group.com>

They are unused and replaced with 0ull like other zero sptes and
is_shadow_present_pte().

Signed-off-by: Lai Jiangshan <jiangshan.ljs@...group.com>
---
 arch/x86/kvm/mmu/mmu_internal.h | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h
index bd2a26897b97..4feb1ac2742c 100644
--- a/arch/x86/kvm/mmu/mmu_internal.h
+++ b/arch/x86/kvm/mmu/mmu_internal.h
@@ -20,16 +20,6 @@ extern bool dbg;
 #define MMU_WARN_ON(x) do { } while (0)
 #endif
 
-/*
- * Unlike regular MMU roots, PAE "roots", a.k.a. PDPTEs/PDPTRs, have a PRESENT
- * bit, and thus are guaranteed to be non-zero when valid.  And, when a guest
- * PDPTR is !PRESENT, its corresponding PAE root cannot be set to INVALID_PAGE,
- * as the CPU would treat that as PRESENT PDPTR with reserved bits set.  Use
- * '0' instead of INVALID_PAGE to indicate an invalid PAE root.
- */
-#define INVALID_PAE_ROOT	0
-#define IS_VALID_PAE_ROOT(x)	(!!(x))
-
 typedef u64 __rcu *tdp_ptep_t;
 
 struct kvm_mmu_page {
-- 
2.19.1.6.gb485710b