From: Paolo Bonzini <pbonzini@redhat.com>
To: Vitaly Kuznetsov <vkuznets@redhat.com>, kvm@vger.kernel.org
Cc: Sean Christopherson <sean.j.christopherson@intel.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>,
Junaid Shahid <junaids@google.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 7/9] KVM: nSVM: implement nested_svm_load_cr3() and use it for host->guest switch
Date: Thu, 9 Jul 2020 19:57:17 +0200 [thread overview]
Message-ID: <4d3f5b01-72d9-c2c5-08e8-c2b1e0046e5e@redhat.com> (raw)
In-Reply-To: <20200709145358.1560330-8-vkuznets@redhat.com>
On 09/07/20 16:53, Vitaly Kuznetsov wrote:
> + if (nested_npt_enabled(svm))
> + nested_svm_init_mmu_context(&svm->vcpu);
> +
> ret = nested_svm_load_cr3(&svm->vcpu, nested_vmcb->save.cr3,
> nested_npt_enabled(svm));
This needs to be done in svm_set_nested_state, so my suggestion is that
the previous patch includes a call to nested_svm_load_cr3 in
svm_set_nested_state, and this one adds the "if" inside
nested_svm_load_cr3 itself.
Paolo
> @@ -364,13 +388,6 @@ static int nested_prepare_vmcb_save(struct vcpu_svm *svm, struct vmcb *nested_vm
> static void nested_prepare_vmcb_control(struct vcpu_svm *svm)
> {
> const u32 mask = V_INTR_MASKING_MASK | V_GIF_ENABLE_MASK | V_GIF_MASK;
> - if (nested_npt_enabled(svm))
> - nested_svm_init_mmu_context(&svm->vcpu);
> -
> - /* Guest paging mode is active - reset mmu */
> - kvm_mmu_reset_context(&svm->vcpu);
> -
> - svm_flush_tlb(&svm->vcpu);
>
next prev parent reply other threads:[~2020-07-09 17:57 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-09 14:53 [PATCH v3 0/9] KVM: nSVM: fixes for CR3/MMU switch upon nested guest entry/exit Vitaly Kuznetsov
2020-07-09 14:53 ` [PATCH v3 1/9] KVM: nSVM: split kvm_init_shadow_npt_mmu() from kvm_init_shadow_mmu() Vitaly Kuznetsov
2020-07-09 14:53 ` [PATCH v3 2/9] KVM: nSVM: stop dereferencing vcpu->arch.mmu to get the context in kvm_init_shadow{,_npt}_mmu() Vitaly Kuznetsov
2020-07-09 17:47 ` Paolo Bonzini
2020-07-09 14:53 ` [PATCH v3 3/9] KVM: nSVM: reset nested_run_pending upon nested_svm_vmrun_msrpm() failure Vitaly Kuznetsov
2020-07-09 17:48 ` Paolo Bonzini
2020-07-09 14:53 ` [PATCH v3 4/9] KVM: nSVM: prepare to handle errors from enter_svm_guest_mode() Vitaly Kuznetsov
2020-07-09 14:53 ` [PATCH v3 5/9] KVM: nSVM: introduce nested_svm_load_cr3() Vitaly Kuznetsov
2020-07-09 14:53 ` [PATCH v3 6/9] KVM: nSVM: move kvm_set_cr3() after nested_svm_uninit_mmu_context() Vitaly Kuznetsov
2020-07-09 17:51 ` Paolo Bonzini
2020-07-09 14:53 ` [PATCH v3 7/9] KVM: nSVM: implement nested_svm_load_cr3() and use it for host->guest switch Vitaly Kuznetsov
2020-07-09 17:57 ` Paolo Bonzini [this message]
2020-07-09 17:59 ` Paolo Bonzini
2020-07-10 11:40 ` Vitaly Kuznetsov
2020-07-10 12:08 ` Paolo Bonzini
2020-07-10 12:30 ` Vitaly Kuznetsov
2020-07-09 14:53 ` [PATCH v3 8/9] KVM: nSVM: use nested_svm_load_cr3() on guest->host switch Vitaly Kuznetsov
2020-07-09 14:53 ` [PATCH v3 9/9] KVM: x86: drop superfluous mmu_check_root() from fast_pgd_switch() Vitaly Kuznetsov
2020-07-09 18:01 ` [PATCH v3 0/9] KVM: nSVM: fixes for CR3/MMU switch upon nested guest entry/exit Paolo Bonzini
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