linux-kernel - [PATCH v3 5/9] KVM: x86: update exception bitmap on CPUID changes

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Message-Id: <20200710154811.418214-6-mgamal@redhat.com>
Date:   Fri, 10 Jul 2020 17:48:07 +0200
From:   Mohammed Gamal <mgamal@...hat.com>
To:     kvm@...r.kernel.org, pbonzini@...hat.com
Cc:     linux-kernel@...r.kernel.org, vkuznets@...hat.com,
        sean.j.christopherson@...el.com, wanpengli@...cent.com,
        jmattson@...gle.com, joro@...tes.org
Subject: [PATCH v3 5/9] KVM: x86: update exception bitmap on CPUID changes

From: Paolo Bonzini <pbonzini@...hat.com>

Allow vendor code to observe changes to MAXPHYADDR and start/stop
intercepting page faults.

Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/kvm/cpuid.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 8a294f9747aa..ea5bbf2153bb 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -128,6 +128,8 @@ int kvm_update_cpuid(struct kvm_vcpu *vcpu)
 	kvm_mmu_reset_context(vcpu);
 
 	kvm_pmu_refresh(vcpu);
+	kvm_x86_ops.update_exception_bitmap(vcpu);
+
 	return 0;
 }
 
-- 
2.26.2