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From: Xiaoyao Li <xiaoyao.li@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
	Sean Christopherson <sean.j.christopherson@intel.com>,
	kvm@vger.kernel.org
Cc: Nadav Amit <namit@cs.technion.ac.il>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	linux-kernel@vger.kernel.org, Xiaoyao Li <xiaoyao.li@intel.com>
Subject: [RFC PATCH 1/3] kvm: x86: Rename KVM_DEBUGREG_RELOAD to KVM_DEBUGREG_NEED_RELOAD
Date: Thu, 16 Apr 2020 18:15:07 +0800	[thread overview]
Message-ID: <20200416101509.73526-2-xiaoyao.li@intel.com> (raw)
In-Reply-To: <20200416101509.73526-1-xiaoyao.li@intel.com>

To make it more clear that the flag means DRn (except DR7) need to be
reloaded before vm entry.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
 arch/x86/include/asm/kvm_host.h | 2 +-
 arch/x86/kvm/x86.c              | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index c7da23aed79a..f465c76e6e5a 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -511,7 +511,7 @@ struct kvm_pmu_ops;
 enum {
 	KVM_DEBUGREG_BP_ENABLED = 1,
 	KVM_DEBUGREG_WONT_EXIT = 2,
-	KVM_DEBUGREG_RELOAD = 4,
+	KVM_DEBUGREG_NEED_RELOAD = 4,
 };
 
 struct kvm_mtrr_range {
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index de77bc9bd0d7..cce926658d10 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1067,7 +1067,7 @@ static void kvm_update_dr0123(struct kvm_vcpu *vcpu)
 	if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
 		for (i = 0; i < KVM_NR_DB_REGS; i++)
 			vcpu->arch.eff_db[i] = vcpu->arch.db[i];
-		vcpu->arch.switch_db_regs |= KVM_DEBUGREG_RELOAD;
+		vcpu->arch.switch_db_regs |= KVM_DEBUGREG_NEED_RELOAD;
 	}
 }
 
@@ -8407,7 +8407,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
 		set_debugreg(vcpu->arch.eff_db[2], 2);
 		set_debugreg(vcpu->arch.eff_db[3], 3);
 		set_debugreg(vcpu->arch.dr6, 6);
-		vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD;
+		vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_NEED_RELOAD;
 	}
 
 	kvm_x86_ops.run(vcpu);
@@ -8424,7 +8424,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
 		kvm_update_dr0123(vcpu);
 		kvm_update_dr6(vcpu);
 		kvm_update_dr7(vcpu);
-		vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD;
+		vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_NEED_RELOAD;
 	}
 
 	/*
-- 
2.20.1


  reply	other threads:[~2020-04-16 11:46 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-16 10:15 [RFC PATCH 0/3] kvm: x86: Cleanup and optimazation of switch_db_regs Xiaoyao Li
2020-04-16 10:15 ` Xiaoyao Li [this message]
2020-04-23 19:09   ` [RFC PATCH 1/3] kvm: x86: Rename KVM_DEBUGREG_RELOAD to KVM_DEBUGREG_NEED_RELOAD Sean Christopherson
2020-04-24 13:28     ` Xiaoyao Li
2020-04-24 20:21     ` Peter Xu
2020-04-24 20:29       ` Sean Christopherson
2020-04-24 20:59         ` Peter Xu
2020-04-25  7:48       ` Paolo Bonzini
2020-04-27 14:37         ` Peter Xu
2020-04-27 16:06           ` Xiaoyao Li
2020-04-25  8:07   ` Paolo Bonzini
2020-04-25 16:54     ` Nadav Amit
2020-04-25 19:16       ` Paolo Bonzini
2020-04-16 10:15 ` [RFC PATCH 2/3] kvm: x86: Use KVM_DEBUGREG_NEED_RELOAD instead of KVM_DEBUGREG_BP_ENABLED Xiaoyao Li
2020-04-23 19:29   ` Sean Christopherson
2020-04-24 13:21     ` Xiaoyao Li
2020-04-16 10:15 ` [RFC PATCH 3/3] kvm: x86: skip DRn reload if previous VM exit is DR access VM exit Xiaoyao Li
2020-04-23 19:31   ` Sean Christopherson

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