linux-kernel - [RFC V2 1/9] Introduce new fields in kvm_arch/vcpu

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Message-Id: <d7684439e1aa1c213c3a29219afda55b9b70b662.1598868204.git.yulei.kernel@gmail.com>
Date:   Tue,  1 Sep 2020 19:54:43 +0800
From:   yulei.kernel@...il.com
To:     pbonzini@...hat.com
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        sean.j.christopherson@...el.com, jmattson@...gle.com,
        junaids@...gle.com, bgardon@...gle.com, vkuznets@...hat.com,
        xiaoguangrong.eric@...il.com, kernellwp@...il.com,
        lihaiwei.kernel@...il.com, Yulei Zhang <yuleixzhang@...cent.com>
Subject: [RFC V2 1/9] Introduce new fields in kvm_arch/vcpu_arch struct for direct build EPT support

From: Yulei Zhang <yuleixzhang@...cent.com>

Add parameter global_root_hpa for saving direct build global EPT root point,
and add per-vcpu flag direct_build_tdp to indicate using global EPT root
point.

Signed-off-by: Yulei Zhang <yuleixzhang@...cent.com>
---
 arch/x86/include/asm/kvm_host.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 5ab3af7275d8..485b1239ad39 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -788,6 +788,9 @@ struct kvm_vcpu_arch {
 
 	/* AMD MSRC001_0015 Hardware Configuration */
 	u64 msr_hwcr;
+
+	/* vcpu use pre-constructed EPT */
+	bool direct_build_tdp;
 };
 
 struct kvm_lpage_info {
@@ -963,6 +966,8 @@ struct kvm_arch {
 
 	struct kvm_pmu_event_filter *pmu_event_filter;
 	struct task_struct *nx_lpage_recovery_thread;
+	/* global root hpa for pre-constructed EPT */
+	hpa_t  global_root_hpa;
 };
 
 struct kvm_vm_stat {
-- 
2.17.1