linux-kernel - [PATCH 1/4] KVM: X86: Fix comments in update_permission

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Message-Id: <20211207095039.53166-2-jiangshanlai@gmail.com>
Date:   Tue,  7 Dec 2021 17:50:36 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     Lai Jiangshan <laijs@...ux.alibaba.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH 1/4] KVM: X86: Fix comments in update_permission_bitmask

From: Lai Jiangshan <laijs@...ux.alibaba.com>

The commit 09f037aa48f3 ("KVM: MMU: speedup update_permission_bitmask")
refactored the code of update_permission_bitmask() and change the
comments.  It added a condition into a list to match the new code,
so the number/order for conditions in the comments should be updated
too.

Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>
---
 arch/x86/kvm/mmu/mmu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 63c04c25fd66..9d045395fe8d 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -4550,8 +4550,8 @@ static void update_permission_bitmask(struct kvm_mmu *mmu, bool ept)
 			 *   - Page fault in kernel mode
 			 *   - if CPL = 3 or X86_EFLAGS_AC is clear
 			 *
-			 * Here, we cover the first three conditions.
-			 * The fourth is computed dynamically in permission_fault();
+			 * Here, we cover the first four conditions.
+			 * The fifth is computed dynamically in permission_fault();
 			 * PFERR_RSVD_MASK bit will be set in PFEC if the access is
 			 * *not* subject to SMAP restrictions.
 			 */
-- 
2.19.1.6.gb485710b