linux-kernel - [PATCH 08/12] KVM: VMX: Use ept_caps_to_lpage_level() in hardware

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Message-Id: <20211124122055.64424-9-jiangshanlai@gmail.com>
Date:   Wed, 24 Nov 2021 20:20:50 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     kvm@...r.kernel.org, Lai Jiangshan <laijs@...ux.alibaba.com>,
        Paolo Bonzini <pbonzini@...hat.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 08/12] KVM: VMX: Use ept_caps_to_lpage_level() in hardware_setup()

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

Using ept_caps_to_lpage_level is simpler.

Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>
---
 arch/x86/kvm/vmx/vmx.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index c6d9c50ea5d4..3b07f5bd86b1 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7693,7 +7693,7 @@ static __init int hardware_setup(void)
 {
 	unsigned long host_bndcfgs;
 	struct desc_ptr dt;
-	int r, ept_lpage_level;
+	int r;
 
 	store_idt(&dt);
 	host_idt_base = dt.address;
@@ -7790,16 +7790,8 @@ static __init int hardware_setup(void)
 		kvm_mmu_set_ept_masks(enable_ept_ad_bits,
 				      cpu_has_vmx_ept_execute_only());
 
-	if (!enable_ept)
-		ept_lpage_level = 0;
-	else if (cpu_has_vmx_ept_1g_page())
-		ept_lpage_level = PG_LEVEL_1G;
-	else if (cpu_has_vmx_ept_2m_page())
-		ept_lpage_level = PG_LEVEL_2M;
-	else
-		ept_lpage_level = PG_LEVEL_4K;
 	kvm_configure_mmu(enable_ept, 0, vmx_get_max_tdp_level(),
-			  ept_lpage_level);
+			  ept_caps_to_lpage_level(vmx_capability.ept));
 
 	/*
 	 * Only enable PML when hardware supports PML feature, and both EPT
-- 
2.19.1.6.gb485710b